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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3219. Отображено 100.
14-06-2012 дата публикации

Secondary Surveillance Radar System for Air Traffic Control

Номер: US20120146833A1
Автор: Alexander Pawlitzki
Принадлежит: THALES DEUTSCHLAND HOLDING GMBH

The invention refers to a secondary surveillance radar, referred to hereinafter as SSR, system ( 1 ) for air traffic control. The SSR-system ( 1 ) comprises a plurality of secondary radar stations ( 2 ) and is adapted for determining a location of an air traffic vehicle within the range of coverage of at least some of the secondary radar stations ( 2 ) by means of propagation time measurement of data signals ( 8 ) transmitted between the secondary radar stations ( 2 ) and a transponder ( 9 ) of the air traffic vehicle. Each of the secondary radar stations ( 2 ) works on a synchronized local time base. In order to provide for a high-precision synchronisation of the radar stations ( 2 ) of the SSR system ( 1 ) free of clusters, it is suggested that an SSR system's ( 1 ) secondary radar station ( 2 ) is synchronized depending on the content of synchronisation signals ( 10 ) received by the secondary radar station ( 2 ) to be synchronized and broadcast by one of the other secondary radar stations ( 2 ) of the SSR system ( 1 ). Preferably, the content comprises a time of transmission of the synchronisation signal ( 10 ).

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Номер записи: 1
14-06-2012 дата публикации

Object detection method

Номер: US20120146839A1
Автор: Takayuki Hidume
Принадлежит: Honda Motor Co Ltd

A dummy target is set in a direction which is the same direction as that of a detected target and at the position whose distance is double that of the detected target; a second-order wave target detection area is set in the predetermined area including the position of the dummy target; the target detected in the second-order wave target detection area is judged as being a second-order wave target; a interpolated target is set in the direction which is the same as that of the second-order wave target, and at the position whose distance is half that of the second-order wave target; a fundamental wave target detection region is set in the predetermined area including the position of the interpolated target; and the interpolated target is outputted as a fundamental wave target in the case where no fundamental wave target is detected in the fundamental wave target detection region. Even if the fundamental wave target to be detected is undetected within a close range, data on the fundamental wave target is estimated and outputted on the basis of the interpolated target calculated from the second-order wave target which continues being detected, as described above. This makes it possible to continue detecting the fundamental wave target without interruption. Accordingly, it is possible to provide an object detection method which enables an object in a close range to be detected securely by a radar device.

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Номер записи: 2
21-06-2012 дата публикации

Apparatus and method for scanning image in image processing system

Номер: US20120154207A1
Автор: Bong-su Kim, Kwang-Seon Kim, Min-soo Kang, Woo-Jin Byun
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Disclosed is an image scanning apparatus in an image processing system, including: a frequency signal generator configured to synthesize at least two single frequency signals; a frequency up converter configured to up-convert and transmit the synthesized single frequency signals; a frequency down converter configured to down-convert and receive frequency signals reflected from an object by the up-converted frequency signals; a frequency sorter configured to sort the down-converted frequency signals so as to correspond to the at least two single frequency signals; a multiple frequency processor configured to generate a transfer function by performing parallel processing on each of the sorted frequency signals; and an image processing unit configured to generate an image of the object by using the transfer function.

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Номер записи: 3
06-12-2012 дата публикации

Radar equipment and received data processing method

Номер: US20120306684A1
Автор: Yoshikazu Shoji
Принадлежит: Individual

According to one embodiment, a radar equipment includes a signal processor, a first and second estimation module and an integration module. The signal processor generates first data based on range bin data. The first estimation module estimates a present position of a target based on second data, and shifts the second data to the estimated position to generate third data. The second estimation module estimates the present position based on first data of an n th previous scan, and shifts the first data of the n th previous scan to the estimated position to generate fourth data. The integration module adds the third data to, and subtracts the fourth data from first data obtained by the present scan to generate second data.

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Номер записи: 4
10-01-2013 дата публикации

Signal processing methods and apparatus

Номер: US20130009806A1
Автор: Mike Newman
Принадлежит: THALES HOLDINGS UK PLC

A signal processor performs a signal transform of a signal, and comprises a signal demodulator for demodulating said signal by a first chirp signal having a first chirp rate to obtain a reduced bandwidth chirped signal, a filter for filtering the reduced bandwidth chirped signal and delaying the reduced bandwidth chirped signal by an interval proportional to a reciprocal of said first chirp rate, a signal modulator for modulating said filtered signal by a second chirp signal having a second chirp rate to obtain an increased bandwidth chirped signal and to provide a time domain output spectrum of said signal, and wherein each of said first chirp signal and said second chirp signal is a complex signal representing a linear frequency modulated chirp.

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Номер записи: 5
16-05-2013 дата публикации

RADAR APPARATUS

Номер: US20130120185A1
Автор: Kishigami Takaaki, Mukai Hirohito, Nakagawa Yoichi
Принадлежит: Panasonic Corporation

A radar apparatus transmits a radio frequency transmission signal from a transmitter antenna in a given transmission period, and receives a signal of a reflected wave reflected by a target via a receiver antenna. The radar apparatus includes a transmission signal generator that generates a first transmission signal obtained by modifying a code having a third sub-code sequence and a fourth sub-code sequence coupled to each other in a first transmission period, and generates a second transmission period obtained by modifying a code having a fifth sub-code sequence and a sixth sub-code sequence coupled to each other in a second transmission period, and a transmitter RF unit that converts the first and second transmission signals into radio frequency transmission signals, and transmits the radio frequency transmission signals from the transmitter antenna. 1. A radar apparatus which transmits a radio frequency transmission signal from a transmitter antenna in a given transmission period , and receives a signal of a reflected wave reflected by a target via a receiver antenna , comprising:a transmission signal generator that generates a first transmission signal obtained by modifying a code having a third sub-code sequence and a fourth sub-code sequence coupled to each other in a first transmission period, and generates a second transmission period obtained by modifying a code having a fifth sub-code sequence and a sixth sub-code sequence coupled to each other in a second transmission period, among first and second sub-code sequences each having a sub-code length obtained by dividing a code sequence having a given code length, and third, fourth, fifth, and sixth sub-code sequences obtained by multiplying each of the first and second sub-code sequences by two kinds of different coefficients; anda transmitter RF unit that converts the first and second transmission signals generated by the transmission signal generator into radio frequency transmission signals, and transmits ...

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Номер записи: 6
30-05-2013 дата публикации

RADAR DEVICE

Номер: US20130135140A1
Автор: Kishigami Takaaki, Mukai Hirohito, Nakagawa Yoichi
Принадлежит: Panasonic Corporation

A high-frequency transmission signal is transmitted from a transmission antenna with a predetermined transmission period, and a signal of a reflected wave reflected from a target is received by a reception antenna. A code generator generates a first code sequence and second code sequence that constitute a pair of complementary codes. A first modulator modulates the first code sequence to generate a first transmission signal. A second modulator modulates the second code sequence to generate a second transmission signal. A quadrature modulator performs quadrature modulation by using the generated first and second transmission signals. The high-frequency transmission signal is generated from a signal that is quadrature modulated, and transmitted from the transmission antenna. 1. A radar device including:a code generator which generates a first code sequence and a second code sequence constituting a pair of complementary codes;a first modulator which modulates the first code sequence to generate a first transmission signal;a second modulator which modulates the second code sequence to generate a second transmission signal;a quadrature modulator which performs quadrature modulation by using the first transmission signal and the second transmission signal that are generated by the first modulator and the second modulator, respectively;an amplifier which generates a high-frequency transmission signal from a signal that is quadrature modulated by the quadrature modulator; andan antenna which transmits the high-frequency transmission signal from a transmission antenna.2. The radar device according to claim 1 , further comprising:a transmission code controller which, in each predetermined transmission period, switches the code sequence which is modulated by the first modulator or the second modulator, from the first code sequence or the second code sequence to the second code sequence or the first code sequence.3. The radar device according to claim 1 , further comprising:an ...

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Номер записи: 7
06-06-2013 дата публикации

Ultra-wideband short-pulse radar with range accuracy for short range detection

Номер: US20130141270A1
Автор: Adam Ferguson, Christopher T. Rodenbeck, Jeffrey Pankonin, Nicola Jean Kinzie, Richard E. Heintzleman, Zorana P. Popovic
Принадлежит: Sandia Corp

An ultra-wideband (UWB) radar transmitter apparatus comprises a pulse generator configured to produce from a sinusoidal input signal a pulsed output signal s having a series of baseband pulses with a first pulse repetition frequency (PRF). The pulse generator includes a plurality of components that each have a nonlinear electrical reactance. A signal converter is coupled to the pulse generator and configured to convert the pulsed output signal into a pulsed radar transmit signal having a series of radar transmit pulses with a second PRF that is less than the first PRF.

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Номер записи: 8
13-06-2013 дата публикации

RADAR APPARATUS

Номер: US20130147655A1
Автор: Kishigami Takaaki, Mukai Hirohito, Nakagawa Yoichi
Принадлежит: Panasonic Corporation

A radar apparatus transmits a high-frequency transmission signal, and receives a signal of a reflective wave reflected by a target. Given a first code sequence of a first code length, a second code sequence of a second code length which is longer than the first code sequence, and a third code sequence obtained by inverting each code of the first code sequence, a first transmission signal obtained by modulating the first code sequence, a second transmission signal obtained by modulating the second code sequence, a third transmission signal obtained by modulating the third code sequence and a fourth transmission signal obtained by modulating the second code sequence are generated in a first transmission period, a second transmission period, a third transmission period and a fourth transmission period respectively. 1. A radar apparatus comprising:a transmission signal generator which generates a first transmission signal in a first transmission cycle by modulating a first code sequence, generates a second transmission signal in a second transmission cycle by modulating a second code sequence, generates a third transmission signal in a third transmission cycle having the same length as the first transmission cycle by modulating a third code sequence that is obtained by inverting the sign of individual codes of the first code sequence, and generates a fourth transmission signal in a fourth transmission cycle by modulating the second code sequence; andan RF transmitter which converts the first, second, third, and fourth transmission signals generated by the transmission signal generator into respective high-frequency transmission signals, and transmits the high-frequency transmission signals from a transmission antenna.2. The radar apparatus according to claim 1 , wherein the second code sequence has a fourth code sequence and a fifth code sequence which are complementary to each other;wherein in the transmission signal generator, the second transmission signal is a ...

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Номер записи: 9
13-06-2013 дата публикации

CREATING AND PROCESSING UNIVERSAL RADAR WAVEFORMS

Номер: US20130147658A1
Автор: Burri Jeremy Francis, Farris Michael Howard, Pohlman Matthew Michael, Potter Randall Edward
Принадлежит: ARETE ASSOCIATES

A new approach to radar imaging is described herein, in which radar pulses are transmitted with an uneven sampling scheme and subsequently processed with novel algorithms to produce images of equivalent resolution and quality as standard images produced using standard synthetic aperture radar (SAR) waveforms and processing techniques. The radar data collected with these waveforms can be used to create many other useful products such as moving target indication (MTI) and high resolution terrain information (HRTI). The waveform and the correction algorithms described herein allow the algorithms of these other radar products to take advantage of the quality Doppler resolution. 1. A radar transmission system comprising:a transmitter system configured to generate one or more radar signals; and at least two neighboring elements that have a separation that is substantially unequal to the separation between at least two other neighboring elements within the aperture;', 'a mainlobe response with a width that is near or substantially equal to the minimum possible mainlobe width; and', 'a sidelobe response with substantially even energy distribution., 'an antenna system configured to radiate the one or more radar signals; wherein the one or more radar signals when radiated by the antenna system comprise an aperture that has2. The radar transmission system of further comprising a processing system configured to generate pulses using a Fourier transform which are used by the transmitter system to generate the one or more radar signals.3. The radar transmission system of wherein the mainlobe and sidelobe response results from that of a quadratic residue (QR) pattern.4. The radar transmission system of wherein the mainlobe and sidelobe response results from that of a pseudo-random pattern.5. The radar transmission system of wherein the substantially unequal separation includes substantially unequal separation in each of multiple dimensions.6. The radar transmission system of ...

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Номер записи: 10
11-07-2013 дата публикации

RADAR DEVICE

Номер: US20130176166A1
Автор: Kishigami Takaaki, Mukai Hirohito, Nakagawa Yoichi
Принадлежит: Panasonic Corporation

A first sector radar generates signals which are obtained by modulating a first code sequence at a first transmission cycle, obtained by modulating a second code sequence at a second transmission cycle, obtained by modulating the first code sequence at a third transmission cycle, and obtained by modulating the second code sequence at a fourth transmission cycle respectively. A second sector radar generates signals which are obtained by modulating the second code sequence at the first transmission cycle, obtained by modulating, at the second transmission cycle, a third code sequence having the opposite polarity to the first code sequence, obtained by modulating, at the third transmission cycle, a fourth code sequence having the opposite polarity to the second code sequence, and obtained by modulating the first code sequence at the fourth transmission cycle respectively. 1. A radar device comprising:a first transmission signal generator that determines codes of a first code sequence having a first code length according to a first rule and generates a modulated first transmission signal, and determines codes of a second code sequence having the first code length according to the first rule and generates a modulated second transmission signal;a first RF transmitter that converts the first transmission signal into a high frequency transmission signal and transmits the result through a first transmission antenna at a first transmission cycle, and converts the second transmission signal into a high frequency transmission signal and transmits the result through the first transmission antenna at a second transmission cycle;a second transmission signal generator that determines codes of the second code sequence according to the first rule and generates a modulated third transmission signal, and determines codes of the first code sequence according to the first rule and generates a modulated fourth transmission signal; anda second RF transmitter that converts the third ...

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Номер записи: 11
26-12-2013 дата публикации

Interference rejection device, radar device, and target finding method

Номер: US20130342383A1
Автор: Tatsuya Kojima
Принадлежит: Furuno Electric Co Ltd

An interference rejection device includes a change amount calculator, a detector, and a rejecter. The change amount calculator is configured to find change amounts in at least one of amplitude and phase of received signals of a plurality of sweeps in a distance direction between a first distance and a second distance. The detector is configured to detect radar interference occurring between the first distance and the second distance by comparing the change amounts calculated by the change amount calculator between the plurality of sweeps. The rejecter is configured to reduce the amplitude of the received signal corresponding to a position of the radar interference.

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Номер записи: 12
02-01-2014 дата публикации

Almost real-time sampling for ground-penetrating radar impulses

Номер: US20140002292A1
Автор: Daniel G. Knierim
Принадлежит: Tektronix Inc

A ground-penetrating RADAR-based system can include a transmitter configured to transmit multiple RADAR impulses and a receiver configured to receive a signal comprising return waves generated responsive to the transmitted RADAR impulses. The signal can include a direct wave portion and a reflected wave portion. The system can also include a processing unit configured to analyze the return waves by determining the direct wave portion, fitting the direct wave portion to determine parametric information corresponding to the return waves, determining the reflected wave portion, determining characteristics of the reflected wave portion based on the parametric information, and comparing the determined characteristics against known characteristics.

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Номер записи: 13
23-01-2014 дата публикации

Signal processing apparatus, radar apparatus, and signal processing method

Номер: US20140023120A1
Автор: Takeshi Fukuda
Принадлежит: Panasonic Corp

A signal processing apparatus which calculates a correlation value between an input analog signal and a digital code includes: an adder which adds a noise signal to the analog signal; an analog comparator which compares, synchronously with a clock signal having a first period, a magnitude of the analog signal added with the noise signal with a reference voltage; a multiplier which receives an input of a comparison result from the analog comparator and the digital code and calculates, synchronously with the clock signal, an exclusive OR between the comparison result and the digital code; and a counter which accumulates calculation results from the multiplier over a second period in a time series, and calculates, as the correlation value, a difference between an accumulation result and one-half of a quotient of the second period and the first period.

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Номер записи: 14
27-03-2014 дата публикации

Radar level gauging using frequency modulated pulsed wave

Номер: US20140085132A1
Автор: Anders Jirskog, Jan Westerling, Olov Edvardsson
Принадлежит: ROSEMOUNT TANK RADAR AB

A method for measurement of a distance to a surface of a product kept in a tank method comprises transmitting a pulse train of distinct carrier wave pulses having a duration greater than 1 microsecond and shorter than 100 milliseconds, the pulse train has an average duty cycle of less than 50 percent, each pulse has a defined center frequency, selected according to a frequency scheme within a predetermined frequency range, greater than 5% of an average center frequency. The method further comprises correlating actual phase properties of received pulses with expected phase properties to provide an updated estimation of the distance. The present invention is based on transmitting a set of carrier wave pulses, each having a distinct frequency selected within a frequency range. The method is therefore referred to as a Frequency Modulated Pulsed Wave (FMPW).

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Номер записи: 15
02-01-2020 дата публикации

Sealing dielectric filling member with mechanically reinforced element

Номер: US20200003603A1
Автор: Peter Elmberg, Rickard Uddh
Принадлежит: ROSEMOUNT TANK RADAR AB

A radar level gauge comprising a signal propagation device, a dielectric filling member arranged in the signal propagation device, and a sealing arrangement for preventing tank content from escaping into the outside environment. The dielectric filling member includes a main body formed of a polymer material, and at least one structurally reinforced element formed of a modified polymer material providing, the modified polymer material being obtained by modifying the polymer material with a filler material, wherein the at least one structurally reinforced element is integrally formed with the main body by sintering, and forms part of the sealing arrangement. The present invention is based on the realization that a structurally reinforced element, made of a modified polymer material, may be integrated into the main body by sintering.

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Номер записи: 16
02-01-2020 дата публикации

PULSED RADAR

Номер: US20200003881A1
Автор: Hjortland Hakon Andre
Принадлежит: Novelda AS

According to a first aspect, a pulsed radar comprises a transmitter; wherein the pulsed radar is arranged to generate a string of binary values; wherein the transmitter comprises a pulse generator arranged to generate a pulse signal comprising a series of transmit pulses with polarities determined in accordance with the string of binary values; wherein a first substring comprises a first series of values; wherein a second substring comprises a second series of values; wherein the second substring is different from the first substring; and wherein each value in the second series of values is either the same as or different from the corresponding value in the first series of values according to a repeating pattern; and wherein the string of binary values comprises at least the first substring and the second substring concatenated together and each optionally being reversed before concatenation. 1. A pulsed radar comprising a transmitter;wherein the pulsed radar is arranged to generate a string of binary values;wherein the transmitter comprises a pulse generator arranged to generate a pulse signal comprising a series of transmit pulses with polarities determined in accordance with the string of binary values;wherein a first substring comprises a first series of values;wherein a second substring comprises a second series of values;wherein the second substring is different from the first substring; andwherein each value in the second series of values is either the same as or different from the corresponding value in the first series of values according to a repeating pattern; andwherein the string of binary values comprises at least the first substring and the second substring concatenated together and each optionally being reversed before concatenation.2. A pulsed radar as claimed in claim 1 , wherein the first substring is the inverse of the second substring.3. A pulsed radar as claimed in claim 1 , wherein the values of the second substring are alternately equal to ...

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Номер записи: 17
07-01-2021 дата публикации

Method for adjusting length of golay sequence for object recognition and electronic device therefor

Номер: US20210003690A1
Автор: Chiho Kim, Junsu CHOI
Принадлежит: SAMSUNG ELECTRONICS CO LTD

A method for adjusting the length of a Golay sequence for object recognition and an electronic device therefor are provided. The method for operating the electronic device includes estimating a predicted distance to an external object, determining, based on the estimated predicted distance, the length of a Golay sequence included in a signal for recognizing the external object, and transmitting at least one signal including a Golay sequence having the determined length, and when a device for wireless communication, included in the electronic device, is utilized to perform a radar function, the length of a Golay sequence is adjusted to enable object recognition as much as a length required according to the use of an application, such that recognition efficiency and data communication efficiency can be optimally provided.

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Номер записи: 18
14-01-2016 дата публикации

RADAR AND OBJECT DETECTION METHOD

Номер: US20160011308A1
Автор: MINAMI Yoshiaki, ODA Yuji
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A DS-SS radar detects an object in such a way that a code generator an oscillator and an antenna repeatedly send a sending signal modulated with a predetermined-frequency code generated by the code generator an A/D converter samples the code, included in the reflected wave of the sending signal reflected by an object, with a sampling period lower than the period of the code, and a correlator calculates the correlation between the reference code, generated by re-arranging the code from the code generator at an interval of Nsp, and the sampling data converted by the A/D converter 1. A radar comprising:a sender that has a code generator and repeatedly sends a sending signal modulated by a code generated by the code generator, the code having a predetermined period;a receiver that samples a reflected wave of the sending signal, reflected by an object, with a sampling period lower than the predetermined period; anda detector that detects the object by calculating a correlation between re-arranged data and the reflected wave sampled by the receiver, the re-arranged data corresponding to data generated by re-arranging the code, generated by the code generator, at an interval corresponding to the sampling period.2. The radar according to whereinthe code is an M sequence code andthe sampling period is a period calculated by multiplying Nsp by a width of one chip of the code, Nsp being a number that is smaller than a code length N of the code and is a power of 2.3. The radar according to whereinthe detector outputs data generated by further re-arranging correlation output data at an interval of (N+1)/Nsp, the correlation output data being acquired by calculating the correlation between the re-arranged data and the reflected wave.4. The radar according to claim 1 , further comprising a reference code generator that is separate from the code generator whereinthe reference code generator generates the re-arranged data corresponding to data generated by re-arranging the code, ...

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Номер записи: 19
10-01-2019 дата публикации

SYSTEMS AND METHODS FOR RESOLVING VELOCITY AMBIGUITY IN AN AUTOMOTIVE RADAR SYSTEM

Номер: US20190011547A1
Автор: Han QH, Klotzbuecher Dirk
Принадлежит: Veoneer US, Inc.

In general the systems and methods described herein relate to velocity ambiguity resolution in an automotive radar system. More particularly, systems and methods produce a unique composite waveform that alternates between, interleaves or otherwise combines a plurality of component waveforms, each characterized by a different velocity ambiguity. Velocity ambiguity is then resolved by determining corresponding Doppler bins which correctly reflect ambiguous velocity calculations for both component waveforms. The systems and methods of the present disclosure are applied to a unique composite linear frequency modulated continuous waveform where component waveforms are generated by modulating one or more parameters of the waveform to change the velocity ambiguity range. Moreover, the systems and methods may selectively apply ambiguity resolution based on the velocity of a host vehicle. 1. A system for resolving velocity ambiguity in an automotive radar system the system comprising:one or more signal generators configured for generating a transmit signal including a composite linear frequency modulated continuous waveform formed by combining at least first and second component waveforms each characterized by a repeated super-pulse sequence (of N super-pulses) with a pre-determined cycle time (Tc), each super-pulse cycle including an active phase with a time Ta Подробнее

Номер записи: 20
09-01-2020 дата публикации

RADAR APPARATUS

Номер: US20200011983A1
Автор: HARA Teruyuki, Ito Masanori, KAGEME Satoshi
Принадлежит: Mitsubishi Electric Corporation

Transmission radars (1-n) (n=1, 2, . . . , N) generate mutually different modulation codes Code(n, h) by cyclically shifting the same code sequence by mutually different cyclic shift amounts Δτ(n), and generate mutually different transmission RF signals (4-n) using the mutually different modulation codes Code(n, h). As a result, the number of transmission radars 1-ncan be made larger, and target detection accuracy can be made higher than in a case where orthogonal codes are used as mutually different modulation codes. 19.-. (canceled)11. The radar apparatus according to claim 10 , wherein the signal processor includes an integrator which integrates the signal subjected to the code demodulation performed by the code demodulator claim 10 , and outputs the integrated signal to the target detector.12. The radar apparatus according to claim 11 , wherein the integrator includes a first integrator which coherently integrates the signal subjected to the code demodulation performed by the code demodulator claim 11 , by performing hit-direction complex integration on the signal subjected to the code demodulation.13. The radar apparatus according to claim 12 , wherein the integrator includes a second integrator which integrates the signal integrated by the first integrator claim 12 , on a basis of positions of the plurality of transmission radars claim 12 , a position of the reception radar claim 12 , and an assumed value of an angle with the target.14. The radar apparatus according to claim 11 , wherein the integrator includes a first integrator coherently integrates the signal subjected to the code demodulation performed by the code demodulator claim 11 , by performing hit-direction Fourier Transform on the signal subjected to the code demodulation.15. The radar apparatus according to claim 14 , wherein the integrator includes a second integrator which integrates the signal integrated by the first integrator claim 14 , on a basis of positions of the plurality of transmission ...

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Номер записи: 21
10-01-2019 дата публикации

Phase shifter

Номер: US20190013814A1
Автор: Cristian Pavao Moreira, Gilles Montoriol, Stephane Thuries
Принадлежит: NXP BV

The disclosure relates to a phase shifter having a first mode of operation and a second mode of operation, the phase shifter comprising a mixer stage configured to mix an oscillator signal with an analogue signal to provide a phase shifted signal, switching circuitry and a controller arranged to provide the analogue signal to the mixer stage as a voltage in the first mode of operation and as a current in the second mode of operation.

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Номер записи: 22
03-02-2022 дата публикации

ELECTRONIC DEVICE, METHOD FOR CONTROLLING ELECTRONIC DEVICE, AND ELECTRONIC DEVICE CONTROL PROGRAM

Номер: US20220034995A1
Автор: OOTSUKI Yutaka, SAHARA Tooru
Принадлежит: KYOCERA CORPORATION

An electronic device detects an object reflecting transmitted waves based on transmitted signals transmitted as the transmitted waves from transmitting antennas and received signals received from receiving antennas as reflected waves obtained by reflection of the transmitted waves. The electronic device determines that the object have been detected when the peak in the result obtained by performing a Fourier transform process on the beat signals generated based on the transmitted and received signals is equal to or higher than a predetermined threshold value. The electronic device sets a predetermined threshold value based on an object detection probability. 1. An electronic device , configured to:detect an object reflecting transmitted waves based on transmitted signals transmitted from a transmitting antenna as the transmitted waves and received signals received from a receiving antenna as reflected waves obtained by reflection of the transmitted waves;determine that the object has been detected when a peak in a result obtained by performing a Fourier transform process on beat signals generated based on the transmitted signals and the received signals is equal to or higher than a predetermined threshold value; andset the predetermined threshold value based on an object detection probability.2. The electronic device claim 1 , according to claim 1 , configured to determine whether the detection of the object has been successful based on a result obtained by performing a clustering process on the result obtained by performing the Fourier transform process on the beat signal.3. The electronic device claim 2 , according to claim 2 , configured to determine that the detection of the object has been successful when it is determined that the object exists as the result obtained by performing the clustering process.4. The electronic device claim 2 , according to claim 2 , configured to determine that the detection of the object has not been successful when it is estimated ...

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Номер записи: 23
03-02-2022 дата публикации

ELECTRONIC DEVICE, METHOD FOR CONTROLLING ELECTRONIC DEVICE, AND ELECTRONIC DEVICE CONTROL PROGRAM

Номер: US20220035018A1
Автор: Murakami Youhei, NISHIKIDO Masamitsu, SAHARA Tooru
Принадлежит: KYOCERA CORPORATION

This electronic device comprises a plurality of transmitting antennas installed in a mobile body and a transmission controller configured to control transmitted waves to be transmitted from the plurality of transmitting antennas to form a beam in a predetermined direction. The transmission controller controls the predetermined direction in which the beam is formed according to a steering direction of the mobile body. 1. An electronic device , comprising:a plurality of transmitting antennas installed in a mobile body; anda transmission controller configured to control transmitted waves to be transmitted from the plurality of transmitting antennas to form a beam in a predetermined direction,wherein the transmission controller controls the predetermined direction in which the beam is formed according to a steering direction of the mobile body.2. The electronic device claim 1 , according to claim 1 ,wherein the transmission controller controls the predetermined direction in which the beam is formed by changing at least one phase of transmitted waves to be transmitted from the plurality of transmitting antennas.3. The electronic device claim 1 , according to claim 1 ,wherein the transmission controller controls the predetermined direction in which the beam is formed according to a steering angle of a steering wheel of the mobile body.4. The electronic device claim 1 , according to claim 1 ,wherein the transmission controller controls change in the predetermined direction in which the beam is formed from a beam reference direction to increase as angular change in the steering wheel from a steering reference direction increases.5. The electronic device claim 1 , according to claim 1 ,wherein the transmission controller controls so that when the steering direction is left, the predetermined direction in which the beam is formed is left, and when the steering direction is right, the predetermined direction in which the beam is formed is right.6. The electronic device claim 1 ...

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Номер записи: 24
19-01-2017 дата публикации

Phase calibration of a stepped-chirp signal for a synthetic aperture radar

Номер: US20170016979A1
Автор: Kwang M. Cho
Принадлежит: Boeing Co

A Radar Calibration Processor (“RCP”) for calibrating the phase of a stepped-chirp signal utilized by a synthetic aperture radar (“SAR”) is disclosed. The RCP includes a periodic phase error (“PPE”) calibrator, first non-periodic phase error (“NPPE”) calibrator in signal communication with the PPE calibrator, and a second NPPE calibrator in signal communication with the first NPPE calibrator.

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Номер записи: 25
18-01-2018 дата публикации

Deceleration hysterisis measuring apparatus for soft recovery system

Номер: US20180017674A1
Автор: Jae-Hyun Choi, Jin-Eep ROH, Min-Sup SONG
Принадлежит: Agency for Defence Development

A deceleration hysteresis measuring apparatus for a soft recovery system is configured to transmit an electromagnetic wave to a pressure tube of the soft recovery system and receive the electromagnetic wave reflected from a projectile moving in the pressure tube so as to measure a distance of the projectile based on signals of the transmitted and received waves.

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Номер записи: 26
17-01-2019 дата публикации

METHOD FOR CODED ULTRASONIC ECHO DETECTION

Номер: US20190018126A1
Автор: Kluge Wolfram
Принадлежит:

A method of signal processing for suppressing at least one sidelobe of an autocorrelation function between a received code sequence and a mismatched filter coefficient vector comprises: setting a filter coefficient vector; modifying the filter coefficient vector, thus generating a modified filter coefficient vector; correlating the modified filter coefficient vector with the code sequence yielding an autocorrelation function comprising a main peak and sidelobes; generating a performance parameter that describes the sidelobe suppression of the autocorrelation function; setting the modified filter coefficient vector as the new filter coefficient vector for a subsequent iteration if the performance parameter shows a performance improvement; and discarding the modified filter coefficient vector if the performance parameter shows no performance improvement. 1. A method of signal processing for suppressing at least one sidelobe of an autocorrelation function between a code sequence and a mismatched filter coefficient vector , the method comprising the steps:setting a filter coefficient vector,modifying the filter coefficient vector, thus generating a modified filter coefficient vector,correlating the modified filter coefficient vector with the code sequence yielding an autocorrelation function comprising a main peak and sidelobes,generating a performance parameter that describes the sidelobe suppression of the autocorrelation function,setting the modified filter coefficient vector as the new filter coefficient vector for a subsequent iteration if the performance parameter shows a performance improvement,discarding the modified filter coefficient vector if the performance parameter shows no performance improvement.2. The method of claim 1 , wherein generating the modified filter coefficient vector comprises:setting a predetermined noise signal,scaling the noise signal by a first predetermined factor such that the amplitude of the noise signal is lower than the coefficients ...

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Номер записи: 27
17-01-2019 дата публикации

RADAR SYSTEM

Номер: US20190018127A1
Автор: BRETT Mark, GUARIN ARISTIZABAL Gustavo, REUTER Ralf
Принадлежит:

A method of detecting an object is disclosed, comprising generating a transmission signal by generating a carrier signal and digitally modulating the carrier signal with a transmission modulation signal, and transmitting the transmission signal. A reflected signal is received, the reflected signal having been reflected from the object, and demodulated to extract a received modulation signal. The received modulation signal is correlated with the transmission modulation signal and a range of the object is determined from the correlation of the received modulation signal and the transmission modulation signal. 1. A method of detecting an object , the method comprising: generating a carrier signal; and', 'digitally modulating the carrier signal with a transmission modulation signal;, 'generating a transmission signal bytransmitting the transmission signal;receiving a reflected signal, the reflected signal having been reflected from the object;demodulating the reflected signal to extract a received modulation signal;correlating the received modulation signal with the transmission modulation signal; anddetermining a range of the object from the correlation of the received modulation signal and the transmission modulation signal.2. The method of claim 1 , wherein the transmission modulation signal is shaped such that an autocorrelation of the transmission modulation signal comprises a delta function.3. The method of claim 1 , wherein the transmission modulation signal is selected from a set of orthogonal modulation signals.4. The method of claim 1 , wherein the method comprises: generating a carrier signal; and', 'digitally modulating the carrier signal with a transmission modulation signal, the transmission modulation signal selected from a set of orthogonal modulation signals;', 'wherein each transmission signal is digitally modulated with a different transmission modulation signal from the set of orthogonal modulation signals such that the transmission modulation signal ...

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Номер записи: 28
16-01-2020 дата публикации

BEAMFORMING TRAINING USING ECHOES OF AN OMNIDIRECTIONAL PULSE

Номер: US20200018842A1
Автор: KARLS Ingolf, Priale Olivares Camila
Принадлежит:

Methods and devices for estimating an angle between a transmitter and a receiver for beamforming are provided. A method includes, with an antenna element in a first device, transmitting an omnidirectional pulse and detecting an echo of the pulse reflected from a second device. An angle between the first device and the second device is estimated based at least on a characteristic of the echo. The method includes transmitting the angle to the second device for use in beamforming between the first device and the second device. 1. A device comprising:a first antenna element; cause the first antenna element to transmit an omnidirectional pulse;', 'cause the first antenna element to detect an echo of the transmitted pulse reflected from a second device;', 'estimate an angle between the device and the second device based at least on a characteristic of the echo; and', 'cause the device to provide the angle to the second device., 'angle estimator circuitry configured to2. The device of claim 1 , wherein the omnidirectional pulse comprises discrete coded waveforms.3. The device of claim 1 , further comprising:a second antenna element to be disposed a first distance from the first antenna element; cause the second antenna element to transmit the omnidirectional pulse simultaneously with the first antenna element;', 'cause the second antenna element to detect the echo;', 'estimate a second distance between the first antenna element and the second device;', 'estimate a third distance between the second antenna element and the second device; and', 'estimate the angle based on the first distance, the second distance, and the third distance., 'wherein the angle estimator circuitry is further configured to4. The device of claim 1 , wherein the angle estimator circuitry is configured to detect the echo based on reflection characteristics in a detected signal that indicate that the signal comprises an echo that is reflected from a communication device.5. The device of claim 1 , ...

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Номер записи: 29
28-01-2016 дата публикации

METHODS AND APPARATUS FOR 3D RADAR DATA FROM 2D PRIMARY SURVEILLANCE RADAR AND PASSIVE ADJUNCT RADAR

Номер: US20160025849A1
Автор: Brookner Eli, Chang Yueh-Chi, Drake Peter R., Fournier Bradley, Ponsford Anthony M., WANG Jian
Принадлежит: RAYTHEON CANADA LIMITED

Methods and apparatus for combining radar signals of a two-dimensional primary radar covering a surveillance area and a passive adjunct radar to provide three-dimensional data for targets and weather. In exemplary embodiments, high beam and low beam data from the primary radar and elevation data from the adjunct radar can be used to mitigate interference from clutter, such as wind farms. 1. A method , comprising:transmitting radar signals using a two-dimensional primary radar to cover a surveillance area;receiving return from the transmitted radar signals at the primary radar;performing high beam and low beam pulse compression on the received return to provide high beam data and low beam data;receiving return from the transmitted radar signal at a passive adjunct radar comprising elevation beam data;synchronizing the primary radar and the adjunct radar;combining range and azimuth data from the primary radar with elevation data from the adjunct radar to provide three-dimensional data for targets and weather; andintegrating data from the primary radar with data from adjunct radar to improve coverage of the radar.2. The method according to claim 1 , wherein the low beam data comprises targets and interference and wherein the some elevation beam data contains interference and not targets; performing adaptive filtering of the low beam data and the elevation beam data to remove the interference.3. The method according to claim 1 , providing capability to simultaneously detect and track surface claim 1 , low flying and air targets to the primary radar.4. The method according to claim 1 , further including using a land clutter path and a no-land clutter path for the elevation beam data.5. The method according to claim 4 , wherein the land-clutter path includes CFAR processing.6. The method according to claim 4 , further including adaptively using weather clutter cancellation in the no-land clutter path.7. The method according to claim 1 , wherein the interference is ...

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Номер записи: 30
10-02-2022 дата публикации

AUTOMATIC DEVICE ORDERING

Номер: US20220043135A1
Автор: Brandt David D., Crum Kyle, Griffiths Scott T., Koczwara Wojciech, Mossakowski Marek, WANG Yutao
Принадлежит:

For automatic device addressing, a processor configures each node device on a serial network for an order measurement. The processor further measures an order parameter for each of the node devices. The processor determines an order number of each of the node devices based on the order parameter for the node device. 1. An apparatus comprising:a processor;a memory storing code executable by the processor to perform:configuring each node device on a serial network for an order measurement;measuring an order parameter for each of the node devices; anddetermining an order number of each of the node devices based on the order parameter for the node device.2. The apparatus of claim 1 , the processor further assigning a serial network unique device address to each of the node devices based on the order number of the node device.3. The apparatus of claim 2 , the processor further communicating with a node device based on the device address.4. The apparatus of claim 1 , wherein at least one node device comprises at least one node component presenting a constant Direct Current (DC) resistance in series with data lines of the serial network and configuring each of the node devices comprises applying a specified current to the data lines and directing each node device to report a node voltage and a node device identifier.5. The apparatus of claim 4 , wherein measuring the order parameter comprises receiving the node voltage as the order parameter associated with the node device identifier claim 4 , wherein the order number is from highest to lowest node voltage.6. The apparatus of claim 1 , wherein configuring each of node devices comprises iteratively directing one of the node devices to communicate an answering pulse and directing all other of the node devices to not communicate the answering pulse.7. The apparatus of claim 6 , wherein measuring the order parameter comprises transmitting a pulse over the data lines claim 6 , receiving an answering pulse selected from the ...

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Номер записи: 31
23-01-2020 дата публикации

Method for filtering the ground and/or sea clutter echoes intercepted by an airborne radar, and radar implementing such a method

Номер: US20200025901A1
Автор: Bernard Joseph, Philippe Goy, Rodolphe Cottron, Vincent Corretja
Принадлежит: Thales SA

The echoes being picked up in the distance-speed domain, the method being wherein it includes a step of producing a mask, in the distance-speed plane, overlying the zone of detection of the ground and/or sea clutter echoes picked up by the sidelobes, the zone being determinable by the antenna parameters of the radar, the waveform emitted by the radar and the environmental context of the radar, all the points of the distance-speed plane which are covered by the mask being assigned a characteristic which is specific to the mask; a step of filtering the received echoes, in which the echoes covered by the mask are rejected from the radar reception processing.

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Номер записи: 32
23-01-2020 дата публикации

SLOW TIME FREQUENCY DIVISION MULTIPLEXING WITH BINARY PHASE SHIFTERS

Номер: US20200025914A1
Автор: Li Zhengzheng, Oster Kurt J.
Принадлежит:

An illustrative example embodiment of a detector device includes a plurality of transmitters and a controller that controls the transmitters to transmit respective signals defined at least in part by a sequence of 2N pulses within a period. N is an integer greater than 1. A first one of the transmitters transmits 2N first signal pulses within the period. Each of the 2N first signal pulses have a first phase. A second one of the transmitters transmits 2N second signal pulses within the period. Each of the 2N first signal pulses is simultaneous with one of the 2N second signal pulses. N second signal pulses have a phase shift of 180° relative to the first phase. Others of the second signal pulses have the first phase. The N second signal pulses having the phase shift are immediately adjacent each other in the sequence. 1. A detector device , comprising:a plurality of transmitters; anda controller that controls the transmitters to transmit respective signals defined at least in part by a sequence of 2N pulses within a period,wherein:N is an integer greater than 1,a first one of the transmitters transmits 2N first signal pulses within the period,each of the 2N first signal pulses have a first phase,a second one of the transmitters transmits 2N second signal pulses within the period,each of the 2N first signal pulses is simultaneous with one of the 2N second signal pulses,N second signal pulses have a phase shift of 180° relative to the first phase,others of the second signal pulses have the first phase, andthe N second signal pulses having the phase shift are immediately adjacent each other in the sequence.2. The detector device of claim 1 , comprising a binary phase shifter that introduces the phase shift of the N second signal pulses having the phase shift.3. The detector device of claim 1 , whereina third one of the transmitters transmits 2N third signal pulses within the period,each of the 2N first signal pulses is simultaneous with one of the 2N third signal pulses ...

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Номер записи: 33
17-02-2022 дата публикации

CONTACTLESS SLEEP DETECTION AND DISTURBANCE ATTRIBUTION

Номер: US20220047208A1
Автор: Dixon Michael, Goldenson Andrew William, Shin Dongeek
Принадлежит: Google LLC

Various systems, devices, and methods for contactless sleep tracking are presented. Based on data received from a contactless sensor, such as a radar sensor, determine that a user has entered a sleep state. A transition time may be determined at which the user transitions from the sleep state to an awake state. An environmental event, based on data received from an environmental sensor, may be identified as occurring within a time period of the transition time. The user waking may be attributed to the environmental event based on the environmental event occurring within the time period of the transition time. An indication of the attributed environmental event as a cause of the user waking may be output. 1. A contactless sleep tracking device , comprising:a housing;a first environmental sensor housed by the housing;a contactless sensor, housed by the housing, that remotely monitors movement of a user;{'claim-text': ['determine, based on data received from the contactless sensor, that the user has entered a sleep state;', 'determine a transition time at which the user transitions from the sleep state to an awake state;', 'identify an environmental event, based on data received from the first environmental sensor, occurring within a time period of the transition time;', 'attribute the user waking to the environmental event based on the environmental event occurring within the time period of the transition time; and', 'output an indication of the attributed environmental event as a cause of the user waking.'], '#text': 'a processing system, comprising one or more processors, housed by the housing, that receives data from the first environmental sensor and the contactless sensor, wherein the processing system is configured to:'}2. The contactless sleep tracking device of claim 1 , wherein the contactless sensor uses low-power continuous wave (CW) radar.3. The contactless sleep tracking device of claim 2 , wherein:the first environmental sensor is an ambient light sensor ...

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Номер записи: 34
17-02-2022 дата публикации

Contactless sleep detection and disturbance attribution for multiple users

Номер: US20220047209A1
Автор: Andrew William Goldenson, Dongeek Shin, Michael Dixon
Принадлежит: Google LLC

Various devices, systems and methods for performing contactless monitoring of the sleep of multiple users over a same time period are presented herein. Clustering may be performed based on data received from a radar sensor. Based on the clustering performed on the data received from the radar sensor, a determination may be made that two users are present within the region. In response to determining that two users are present, a midpoint location may be calculated between the clusters. A first portion of the data may be mapped to a first user and a second portion of the data may be mapped to a second user based on the calculated midpoint. Separate sleep analyses may be performed for the first user and the second user.

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Номер записи: 35
17-02-2022 дата публикации

Initializing Sleep Tracking on a Contactless Health Tracking Device

Номер: US20220047210A1
Автор: Ajay KANNAN, Andrew William Goldenson, Desmond Chik, Dongeek Shin, Michael Dixon
Принадлежит: Google LLC

Various arrangements for performing an initial setup process of a sleep tracking device are presented. User input may be received that requests a sleep tracking setup process be performed. In response to the user input, a detection process may be performed based on data received from the radar sensor to determine whether a user is present and static. In response to the detection process determining that the user is present and static, a consistency analysis may be performed over a time period to assess a duration of time that the user is present and static. Based on the consistency analysis, sleep tracking may be activated such that when the user is detected in bed via the radar sensor, the user's sleep is tracked.

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Номер записи: 36
04-02-2016 дата публикации

RADAR DATA COMPRESSION SYSTEM AND METHOD

Номер: US20160033631A1
Автор: Alland Stephen W., SEARCY JAMES F.
Принадлежит:

A radar system includes a controller equipped with memory for storing data. The controller is configured to receive a time-domain signal representative of a reflected signal detected by an antenna, and transform the time-domain signal into a plurality of range datasets. Each range dataset corresponds to one of the plurality of chirps, each range dataset is represented by a series of values assigned to a plurality of range bins, and each of the values includes a sign bit. The controller is also configured to compress the plurality of range datasets by storing in the memory a portion of each of the values assigned to at least one of the plurality of range bins, wherein the portion is defined to exclude a first number of redundant sign bits of each value. The controller may further compress the portion by retaining a second number of bits of the data by excluding some of the least significant bits of each value. 1. A radar system comprising:{'b': '18', 'claim-text': 'wherein the emitted signal includes of a plurality of chirps; and', 'an antenna configured to detect a reflected signal characterized as a reflection of an emitted signal reflected by an object present in a field-of-view of the antenna,'}a controller equipped with memory for storing data, said controller configured to receive a time-domain signal representative of the reflected signal detected by the antenna,transform the time-domain signal into a plurality of range datasets, wherein each range dataset corresponds to one of the plurality of chirps, each range dataset is represented by a series of values assigned to a plurality of range bins, and each of the values includes a sign bit, andcompress the plurality of range datasets by storing in the memory a portion of each of the values assigned to at least one of the plurality of range bins, wherein the portion is defined to exclude a first number of redundant sign bits of each value.2. The system in accordance with claim 1 , wherein the first number of ...

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Номер записи: 37
17-02-2022 дата публикации

RADAR TRANSCEIVER

Номер: US20220050174A1
Автор: Delbecq Dominique, Goumballa Birama, Montoriol Gilles, Pavao Moreira Cristian
Принадлежит:

The disclosure relates to a radar transceiver having a transmitter comprising a phase shifter. Example embodiments include a radar transceiver () having a normal mode of transmitter operation and a self-test mode of operation, the transceiver () comprising: a digital controller () configured to provide a digital control signal indicative of a phase shift; a digital to analogue converter () configured to receive the digital control signal and provide an analogue signal in accordance with the phase shift; a phase shifter () configured to receive the analogue signal and provide a phase shifted output signal for transmission; a dummy load () connected to receive the analogue signal from the digital to analogue converter () and to provide an analogue output; a resistor network () connected across an output of the dummy load (); a testing module () configured to measure the analogue output of the dummy load (); and a controller module () configured to control operation of the dummy load (); testing module () and digital controller () during the self-test mode of operation by: enabling the dummy load (); operating the digital controller () to provide a range of digital control signals to the digital to analogue converter (); and operate the testing module () to measure the analogue output of the dummy load () to determine a measure of linearity of the digital to analogue converter (). 1. A radar transceiver having a normal mode of transmitter operation and a self-test mode of operation , the transceiver comprising:a digital controller configured to provide a digital control signal indicative of a phase shift;a digital to analogue converter configured to receive the digital control signal and provide an analogue signal in accordance with the phase shift;a phase shifter configured to receive the analogue signal and provide a phase shifted output signal for transmission;a dummy load connected to receive the analogue signal from the digital to analogue converter and to provide ...

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Номер записи: 38
17-02-2022 дата публикации

Slow Time Frequency Division Multiplexing with Binary Phase Shifters

Номер: US20220050197A1
Автор: Li Zhengzheng, Oster Kurt J.
Принадлежит:

An illustrative example embodiment of a detector device includes a plurality of transmitters and a controller that controls the transmitters to transmit respective signals defined at least in part by a sequence of 2N pulses within a period. N is an integer greater than 1. A first one of the transmitters transmits 2N first signal pulses within the period. Each of the 2N first signal pulses have a first phase. A second one of the transmitters transmits 2N second signal pulses within the period. Each of the 2N first signal pulses is simultaneous with one of the 2N second signal pulses. N second signal pulses have a phase shift of 180° relative to the first phase. Others of the second signal pulses have the first phase. The N second signal pulses having the phase shift are immediately adjacent each other in the sequence. 1. A system comprising:a plurality of transmitters;one or more receivers; and cause a first of the transmitters to transmit a set of first radar pulses within a period;', a number of the second radar pulses is equal to a number of the first radar pulses,', 'the second radar pulses are simultaneous with the first radar pulses,', 'a plurality of adjacent second radar pulses have a phase shift relative to the first radar pulses, and', 'second radar pulses other than the adjacent second radar pulses do not have the phase shift;, 'cause a second of the transmitters to transmit a set of second radar pulses within the period, wherein, 'receive, via one of the receivers, a reflection signal for the period that is caused by the first and second sets of radar pulses reflecting off an object; and', 'determine a first portion of the reflection signal that corresponds to the set of first radar pulses from the first of the transmitters and a second portion of the reflection signal that corresponds to the set of second radar pulses from the second of the transmitters., 'a controller configured to2. The system of claim 1 , wherein the controller is further configured ...

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Номер записи: 39
30-01-2020 дата публикации

Multicarrier and Frequency Hopped Radar Waveform Generator using Efficient Digital Synthesis

Номер: US20200033441A1
Автор: Colin J. O'Brien, Michael P. Civerolo, Nicholas A. Lumsden, Nicholas T. Johnson
Принадлежит: US Department of Navy

A radar pulse generator includes a multiplexer, a polyphase synthesizer, a first signal channel and a second signal channel. The multiplexer has a baseband radar pulse input, a multiplexer control input, a first channel output and a second channel output. The baseband radar pulse input signal is a single channel baseband radar pulse signal. The multiplexer control input signal selects one of the group consisting of the first channel output and the second channel output. The polyphase synthesizer synthesizes the first channel output signal, synthesizes the second channel output signal and outputs a desired radar pulse signal based on the synthesized first channel output signal and the synthesized second channel output signal. The first signal channel provides the first channel output signal from the first channel output to the polyphase synthesizer. The second signal channel provides the second channel output signal from the second channel output to the polyphase synthesizer.

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Номер записи: 40
04-02-2021 дата публикации

METHODS AND SYSTEMS FOR DETECTING AND PASSIVELY MONITORING COMMUNICATIONS OF AN UNMANNED AERIAL VEHICLE

Номер: US20210033715A1
Автор: Flower Nathan D., MASSARIK David Michael
Принадлежит:

Methods and systems for detecting and passively monitoring communication of an unmanned aerial vehicle are disclosed. In an example method, a radio frequency spectrum is scanned to detect one or more radio signals transmitted within a pre-defined area. A modulated radio signal of interest from the one or more radio signals is determined. The radio signal of interest is associated with a drone. The radio signal of interest is captured. The radio signal of interest is demodulated to determine coded sensor data carried by the radio signal of interest. The sensor data is determined by the drone. The coded sensor data is decoded to determine a characteristic of the sensor data. An alert is generated based on the characteristic of the sensor data. 1. A method comprising:scanning a radio frequency spectrum to detect one or more radio signals transmitted within a pre-defined area;determining a modulated radio signal of interest from the one or more radio signals, wherein the radio signal of interest is associated with a drone;capturing the radio signal of interest;demodulating the radio signal of interest to determine coded sensor data carried by the radio signal of interest, wherein the sensor data is determined by the drone;decoding the coded sensor data to determine a characteristic of the sensor data; andgenerating an alert based on the characteristic of the sensor data.2. The method of claim 1 , wherein the generating the alert is further based on a comparison of the characteristic of the sensor data to a pre-defined characteristic.3. The method of wherein the determining the radio signal of interest comprises comparing the one or more radio signals captured by scanning the radio frequency spectrum to a set of known radio signals.4. The method of claim 1 , wherein the sensor data comprises at least one of video data claim 1 , image data claim 1 , sound data claim 1 , material detection data claim 1 , material measurement data claim 1 , and environmental data.5. The ...

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Номер записи: 41
01-02-2018 дата публикации

Angle of arrival (aoa) positioning method and system for positional finding and tracking objects using reduced attenuation rf technology

Номер: US20180035256A1
Автор: Truman Prevatt
Принадлежит: Polte Corp

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival

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Номер записи: 42
17-02-2022 дата публикации

Systems and methods for enabling and utilizing radar capability on a wireless communication

Номер: US20220053463A1
Автор: Arda Aksu, Donna L. Polehn, Jin Yang, Lalit R. KOTECHA, Vishwanath Ramamurthi
Принадлежит: VERIZON PATENT AND LICENSING INC

A base station may allocate wireless communication resources to configure a synthetic wireless communication signal for use as a radar signal. The synthetic wireless communication signal may be configured according to a wireless communication protocol of a wireless communication network that is associated with the base station. The base station may transmit, from an antenna and toward an area associated with the base station, the synthetic wireless communication signal. The base station may detect a reflected signal that is associated with the synthetic wireless communication signal. The base station may process the reflected signal to generate radar data; and perform an action associated with the radar data and the area.

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Номер записи: 43
31-01-2019 дата публикации

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Номер: US20190037350A1
Автор: Prevatt Truman
Принадлежит:

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining an elevation of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with at least two antennas, wherein a first antenna among the at least two antennas is displaced in a vertical direction with respect to a second antenna among the at least two antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel, determining an angle of arrival between a baseline of the at least two antennas and incident energy from the UE to at least two antennas; andutilizing the angle of arrival to calculate the elevation of the UE.2. The method of claim 1 , wherein the at least two antennas are antenna elements of an antenna array.3. The method of claim 2 , wherein the antenna elements are located in a single antenna enclosure in a sector.4. The method of claim 2 , wherein the ...

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Номер записи: 44
31-01-2019 дата публикации

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Номер: US20190037351A1
Автор: Prevatt Truman
Принадлежит:

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining a position of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with a plurality of antennas in at least one antenna enclosure, wherein each antenna among the plurality of antennas is displaced in one or more of a vertical direction and a horizontal direction with respect to other antennas among the plurality of antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel, determining an angle of arrival between a baseline of the plurality of antennas and incident energy from the UE to the plurality of antennas; andutilizing the angle of arrival to calculate the position of the UE.2. The method of claim 1 , wherein the antenna enclosure is an antenna array.3. The method of claim 2 , wherein antenna elements of the antenna enclosure are located in a single ...

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Номер записи: 45
15-02-2018 дата публикации

MULTI-RESOLUTION FMCW RADAR DETECTION METHOD AND RADAR IMPLEMENTING SUCH A METHOD

Номер: US20180045819A1
Автор: Cornic Pascal, Le Bihan Patrick, Quellec Jean-Michel
Принадлежит:

A detection method implementing an FMCW waveform is provided, the emitted waveform is formed of a recurring pattern of given period Tr covering an emission frequency band of given width B, each pattern being divided into a given number P of sub-patterns of duration Tr/P covering an excursion frequency band ΔF=B/P, the sub-patterns being mutually spaced by a frequency interval equal to ΔF. The radar performs: a first distance-compression processing operation carrying out a low-resolution distance compression at the scale of each recurring pattern on a fraction B/P of the emission band of width B corresponding to the frequency band covered by each of the sub-patterns; a Doppler processing operation on a given number N of successive recurrences so as to form P ambiguous distance-Doppler maps of low distance resolution, the maps being segmented into various speed domains; a second distance-compression processing operation of resolution that differs depending on the speed domain to which the relative speed of the target with respect to the radar belongs. 1. A radar target-detection method implementing an FMCW waveform , wherein the emitted waveform being formed of a recurring pattern of given period Tr covering an emission frequency band of given width B , each pattern being divided into a given number P of sub-patterns of duration Tr/P covering an excursion frequency band ΔF=B/P , said sub-patterns being mutually spaced by a frequency interval equal to ΔF , said method performs at least:a first distance-compression processing operation carrying out a low-resolution distance compression at the scale of each recurring pattern on a fraction B/P of said emission band of width B corresponding to the frequency band covered by each of said sub-patterns;a Doppler processing operation on a given number N of successive recurrences so as to form P ambiguous distance-Doppler maps of low distance resolution, said maps being segmented into at least two speed domains one of which ...

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Номер записи: 46
03-03-2022 дата публикации

Detecting an object outside of a field of view

Номер: US20220063602A1
Автор: Chang-Heng Wang, Onur Altintas, Takayuki Shimizu
Принадлежит: Toyota Motor Engineering and Manufacturing North America Inc

A message can be received from a first object. The message can include information about a position of the first object. An electromagnetic energy can be caused to be transmitted in a direction of the first object at a time in which the first object is in motion. A reflection of the electromagnetic energy can be received from the direction of the first object. A first possible position of a second object can be determined based on the reflection of the electromagnetic energy having traveled entirely along a path defined by a line formed by the first object and the vehicle. A second possible position of the second object can be determined based on the reflection of the electromagnetic energy having traveled along a path outside of the line. An actual position of the second object being the second possible position of the second object can be determined.

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Номер записи: 47
03-03-2022 дата публикации

Pulsed radar system and method with digital mixer for frequency hopping

Номер: US20220065985A1
Автор: Himamshu Gopalakrishna Khasnis, Nikhil Birur Gururaja Rao
Принадлежит: Signalchip Innovations Pvt Ltd

A radar system for generating a fast frequency hopping output for frequency agility using a transmitter block and a receiver block. The transmitter block is configured to (i) modulate a digital signal using a first digital mixer, (ii) convert a modulated signal into an inphase analog signal and provide the inphase analog signal to at least one of a first RF IQ mixer or a third RF IQ mixer, (iii) convert the modulated signal into a quadrature analog signal provide the quadrature analog signal to at least one of the first RF IQ mixer or the third RF IQ mixer, and (iv) generate the fast frequency hopping output radar signal by mixing the inphase analog signal and the quadrature analog signal with an inphase RF local oscillator signal and a quadrature RF local oscillator signal.

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Номер записи: 48
14-02-2019 дата публикации

METHOD AND APPARATUS FOR MEASURING DISTANCE

Номер: US20190049569A1
Автор: CHOI Sungdo, Kim Donghan, KIM Jong-Sok, LEE Jaesup
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A distance measuring method and apparatus are provided. The distance measuring apparatus emits a transmission signal while changing a frequency over time, receives a reception signal from an object in response to the transmission signal being reflected from the object, samples a beat frequency indicating a difference between a frequency of the transmission signal and a frequency of the reception signal in a sampling range that changes based on the beat frequency, and determines a distance to the object based on the sampling. 1. A distance measuring method comprising:emitting a transmission signal while changing a frequency over time;receiving a reception signal from an object, in response to the transmission signal being reflected from the object;sampling a beat frequency indicating a difference between a frequency of the transmission signal and a frequency of the reception signal in a sampling range that changes based on the beat frequency; anddetermining a distance to the object based on the sampling.2. The distance measuring method of claim 1 , wherein a first sampling range corresponding to a first beat frequency is lesser than a second sampling range corresponding to a second beat frequency that is greater than the first beat frequency.3. The distance measuring method of claim 1 , wherein a first sampling range corresponding to a first beat frequency is greater than a second sampling range corresponding to a second beat frequency that is greater than the first beat frequency.4. The distance measuring method of claim 1 , wherein the frequency of the transmission signal changes with time.5. The distance measuring method of claim 1 , wherein the frequency of the transmission signal linearly changes with time for a single period.6. The distance measuring method of claim 1 , wherein the determining of the distance comprises calculating the distance to the object based on the difference between the frequency of the transmission signal and the frequency of the ...

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Номер записи: 49
25-02-2016 дата публикации

Combining Reflected Signals

Номер: US20160054432A1
Автор: Chen Ee, LILBURN Lindsay, Phillips Roger
Принадлежит:

A system, computer-readable medium, and method for receiving reflected signals. In one implementation, the system includes a receiver, a pulse compressor, a framer, and a frame generator. The receiver receives the reflected signals. The pulse compressor compresses the reflected signals and the framer interprets the reflected signals. The frame generator combines one or more modified frames associated with the reflected signals. 1. A radar system for processing one or more reflected signals , the system comprising:a receiver for receiving the one of more reflected signals;a pulse compressor for compressing the one of more reflected signals;a framer for interpreting the one of more reflected signals; anda frame generator for combining one or more modified frames associated with the one of more reflected signals.2. The radar system of claim 1 , wherein the frame generator is configured to generate a super-frame based on combining the one or more modified frames.3. The radar system of claim 1 , wherein the compressing the one of more reflected signals includes correlating the one or more reflected signals with a corresponding reference signal.4. The radar system of claim 1 , wherein the interpreting the one of more reflected signals comprises generating one or more truncated frames associated with the one of more reflected signals.5. The radar system of claim 1 , wherein the frame generator comprises:an equalizer for equalizing a noise floor associated with the one or more reflected signals;a noise corrector for correcting a noise distribution associated with the one of more reflected signals;a mainlobe reformer for normalizing one or more mainlobes associated with the one of more reflected signals; anda resampler for decimating one or more reformed frames associated with the one of more reflected signals.6. A method for processing one or more reflected signals claim 1 , comprising:receiving the one of more reflected signals;compressing the one of more reflected signals ...

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Номер записи: 50
25-02-2016 дата публикации

Common Burst for Pulse Compression Radar

Номер: US20160054437A1
Автор: Chen Ee, LILBURN Lindsay, Phillips Roger
Принадлежит:

Various implementations described herein are directed to a common burst for pulse compression radar. In one implementation, a method may include determining a first burst for a first range using a pulse compression radar system, where the first burst comprises one or more first transmission frames. The method may also include determining a second burst for a second range using the pulse compression radar system, where the second burst comprises one or more second transmission frames. The method may further include transmitting a common burst for the first range and the second range using the pulse compression radar system, where the common burst includes the one or more first transmission frames and the one or more second transmission frames. 1. A method , comprising:determining a first burst for a first range using a pulse compression radar system, wherein the first burst comprises one or more first transmission frames;determining a second burst for a second range using the pulse compression radar system, wherein the second burst comprises one or more second transmission frames; andtransmitting a common burst for the first range and the second range using the pulse compression radar system, wherein the common burst includes the one or more first transmission frames and the one or more second transmission frames.2. The method of claim 1 , wherein at least one common transmission frame is included in the one or more first transmission frames and included in the one or more second transmission frames claim 1 , and wherein the at least one common transmission frame is transmitted once with the common burst.3. The method of claim 1 , further comprising:determining a third burst for a third range using the pulse compression radar system, wherein the third burst comprises one or more third transmission frames; andtransmitting a common burst for the first range, the second range, and the third range using the pulse compression radar system, wherein the common burst ...

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Номер записи: 51
25-02-2021 дата публикации

Determining a Mixing Ratio in HVAC Systems

Номер: US20210055400A1
Автор: Konrad Hilmar, Petry Karl-Heinz, Weiers Tilman
Принадлежит: SIEMENS SCHWEIZ AG

Device for determining the mixing ratio of a mixture of at least two different fluids, the device comprising: a pipe section with a measuring region; wherein the mixture flows through the measuring region; a radar sensor system with a radar sensor chip arranged on an outer wall of the pipe section. The radar sensor system is configured to: irradiate frequency-modulated millimeter-radar waves (f) in a specified frequency range (Δf) into the measuring region; receive millimeter-radar waves (f) backscattered by the mixture; determine a frequency-dependent reflection coefficient (ρ) for the specified frequency range (Δf) using the backscattered millimeter-radar waves (f); and calculate or allocate the mixing ratio from the determined frequency-dependent reflection coefficient (ρ). 1. A device for determining the mixing ratio of a mixture comprising at least two different fluids , the device comprising:a pipe section with a measuring region, wherein the mixture flows through the measuring region;a radar sensor system including a radar sensor chip with a sensor outer side arranged on an outer wall of the pipe section; irradiate frequency-modulated millimeter-radar waves in a specified frequency range into the measuring region;', 'receive millimeter-radar waves backscattered back from the mixture;', 'determine a frequency-dependent reflection coefficient for the specified frequency range using the backscattered millimeter-radar waves; and', 'calculate the mixing ratio from the determined frequency-dependent reflection coefficient., 'wherein the radar sensor system is configured to2. The device as claimed in claim 1 , wherein the radar sensor chip is configured to:irradiate frequency-modulated millimeter-radar waves in a specified frequency range into the measuring region (MR); andreceive millimeter-radar waves backscattered at the mixture.3. The device as claimed in claim 1 , wherein:the radar sensor system comprises a microcontroller in operative communication with the ...

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Номер записи: 52
25-02-2021 дата публикации

RADAR APPARATUS

Номер: US20210055401A1
Автор: TAKAYAMA Takuya
Принадлежит:

A radar apparatus is provided with a data calculation unit, a first threshold calculation unit, a second threshold calculation unit, a detection threshold calculation unit and a peak detecting unit. The data calculation unit performs a frequency analysis of the reception signal to produce complex data. The first threshold calculating unit adds a predetermined addition value to a power value of the average data where the complex data is averaged to calculate a first threshold. The second threshold calculation unit calculates a second threshold based on a noise power. The detection threshold calculation unit calculates, for each frequency bin, a larger value of the first threshold and the second threshold to be the detection threshold. 1. A radar apparatus mounted on a vehicle comprising:a transmission antenna configured to transmit radar waves;a reception antenna configured to receive reflected waves produced by reflection of the radar waves;a signal acquiring unit configured to acquire a reception signal based on the reflected waves;a data calculation unit configured to perform a frequency analysis applied to the reception signal acquired by the signal acquiring unit to calculate complex data as a function of a frequency;an average calculation unit configured to calculate an average data in which a plurality of the complex data in a predetermined period before current processing cycle are averaged for each frequency bin;a first threshold calculation unit configured to add a predetermined addition value to a power value of the average data calculated by the average calculation unit to calculate a first threshold as a function of a frequency;a second threshold calculation unit configured to calculate a second threshold as a function of a frequency based on a noise power in an observation of the radar apparatus;a detection threshold calculation unit configured to compare the first threshold calculated by the first threshold calculation unit with the second threshold ...

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Номер записи: 53
01-03-2018 дата публикации

Asymmetric Double-Sided Two-Way Ranging in an Ultrawideband Communication System

Номер: US20180059235A1
Автор: McLaughlin Michael, VERSO Billy
Принадлежит: DECAWAVE LTD.

In an ultra-wideband (“UWB”) communication system comprising a pair of UWB transceivers, an asynchronous two-way ranging method for closely estimating the time-of-flight between the transceivers after the exchange of only 3 messages between the transceivers. In an alternate asynchronous two-way ranging method, the time-of-flight between the transceivers may be closely estimated after the exchange of only 4 messages between the transceivers. 2. The method of further including the step of:{'sub': 'f', '[1.4.3] developing an estimate of a distance between A and B as a function of {tilde over (T)}.'}4. The method of further including the step of:{'sub': 'f', '[3.6.3] developing an estimate of a distance between A and B as a function of {tilde over (T)}.'}5. An asymmetric two-way ranging circuit configured to perform the method of any preceding claim.6. A wireless receiver comprising an asymmetric two-way ranging circuit according to .7. A wireless transceiver comprising a wireless receiver according to .8. A wireless communication system comprising a wireless transceiver according to .9. A non-transitory computer readable medium including executable instructions which claim 7 , when executed in a processing system claim 7 , causes the processing system to perform the steps of a method according to any one of to . This application is related to Provisional Application Ser. No. 62/160,469, filed 12 May 2015 (“Parent Provisional”).This application claims priority to the Parent Provisional, and hereby claims benefit of the filing date thereof pursuant to 37 CFR §1.78(a)(4).The subject matter of the Parent Provisional, in its entirety, is expressly incorporated herein by reference.The present invention relates generally to wireless communication systems, and, in particular, to a wireless communication system adapted to perform asymmetric double-sided two-way ranging.In general, in the descriptions that follow, we will italicize the first occurrence of each special term of ...

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Номер записи: 54
17-03-2022 дата публикации

Robot Guiding System and Method

Номер: US20220083075A1
Автор: Heiss Heinrich Guenther, Soloperto Raffaele
Принадлежит:

Embodiments of the present disclosure relate to a guiding system for a robot. The guiding system includes a millimeter-wave positioning system and a transmitter. The millimeter-wave positioning system is configured to determine a position of the robot relative to a base station for charging the robot. The transmitter is configured to emit a radar guiding signal for guiding the robot to the base station and to steer the radar guiding signal towards the position of the robot. 1. A guiding system for a robot , the guiding system comprising:a millimeter-wave positioning system configured to determine a position of the robot relative to a base station for charging the robot; anda transmitter configured to emit a radar guiding signal for guiding the robot to the base station and to steer the radar guiding signal towards the position of the robot.2. The guiding system of claim 1 , wherein the millimeter-wave positioning system is configured to emit a radar positioning signal;receive a reflection of the radar positioning signal from the robot; anddetermine the position of the robot using the reflection.3. The guiding system of claim 2 , wherein the millimeter-wave positioning system is configured to emit the radar positioning signal using the transmitter.4. The guiding system of claim 1 ,wherein the millimeter-wave positioning system exhibits a first field of view; andwherein the transmitter is configured to emit the radar guiding signal within a second field of view enclosed by the first field of view.5. The guiding system of claim 1 ,wherein the transmitter comprises a plurality of transmit elements each having a respective field of view, andwherein the transmitter is configured to steer the radar guiding signal towards the position of the robot by emitting, using one of the transmit elements, the radar guiding signal selectively in a single field of view upon determination of the robot being located therein.6. The guiding system of claim 1 , further comprising a ...

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Номер записи: 55
28-02-2019 дата публикации

APPARATUS AND METHOD FOR RF INTERFERENCE AVOIDANCE IN AN AUTOMOTIVE DETECTION SYSTEM

Номер: US20190064335A1
Автор: Boutin Alain, Paradie Michael
Принадлежит: Veoneer US, Inc.

A method of mitigates RF interference from an RF interferer. An RF signal is received at an RF transceiver during a time period. The RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature. The received RF signal is analyzed in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern. Transmission of the RF signals from the RF transceiver are synchronized with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal. 1. A method of mitigating RF interference from an RF interferer , comprising:receiving at an RF transceiver during a time period an RF signal that includes, for at least a portion of the time period, an interference signal having a cyclic transmission pattern with at least one deterministic feature;analyzing the received RF signal in order to determine timing information for the at least one deterministic feature and the associated interference signal cyclic transmission pattern; andsynchronizing transmission of RF signals from the RF transceiver with the interference signal transmission pattern based on the determined timing information to mitigate interference between the RF signals and the interference signal.2. The method of claim 1 , wherein the interference signal comprises a direct wave from an interferer RF transceiver.3. The method of claim 2 , wherein the receiving RF transceiver and the interferer RF transceiver transmit in the same frequency band.4. The method of claim 1 , wherein analyzing the received RF signal comprises:measuring the power envelope of the received RF signal to identify the at least one deterministic feature and timing information associated therewith; andcomparing the identified at least one deterministic feature and ...

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Номер записи: 56
28-02-2019 дата публикации

Radar apparatus

Номер: US20190064336A1
Автор: Ryuhei Takahashi, Toru Takahashi
Принадлежит: Mitsubishi Electric Corp

Pulse compression units (9-m) (m=1, . . . , M) obtain frequency spectra of received signals by performing Fourier transform on the received signals output from receiver devices (7-m), calculate spectrum products of references for pulse compression, the references determined by beam directional angles indicating propagation directions of transmission pulses and carrier frequencies, and the frequency spectra, and perform inverse Fourier transform on the spectrum products. This enables reduction in the calculation scale by reducing the number of times of execution of Fourier transform and inverse Fourier transform when pulse compression is performed.

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Номер записи: 57
27-02-2020 дата публикации

USE OF THE SIDEBANDS OF A MACH-ZEHNDER MODULATOR FOR A FMCW DISTANCE MEASUREMENT

Номер: US20200064116A1
Автор: Le Floch Sebastien, ROHNER Marcel, Salvade Yves
Принадлежит: HEXAGON TECHNOLOGY CENTER GMBH

A distance measuring method and device, wherein a first and a second laser radiation are generated so that the first laser radiation has a first frequency modulation and the second laser radiation has a second frequency modulation, wherein at least in sections a time derivative of the first frequency modulation is different from a time derivative of the second frequency modulation. In accordance with the invention the first and the second laser radiation are generated by modulating a base radiation by means of an electro-optical modulator, so that an output radiation comprising a carrier component and a plurality of sideband components is produced, wherein a first sideband component provides the first laser radiation and a second sideband component provides the second laser radiation. 2. The distance measuring method according to claim 1 , wherein in at least a section of the second frequency modulation the second frequency modulation has a modulation direction running in opposite direction compared to the modulation direction of the first frequency modulation in a corresponding section of the first frequency modulation.3. The distance measuring method according to claim 1 , whereina reference signal is generated based on at least part of the control signal,a sampling of the reference signal is carried out, andthe sampling is taken into account when determining the at least one distance to the target.4. The distance measuring method according to claim 3 , wherein the control signal is generated based on an output signal of a signal generator claim 3 , whereinfrom the sampling a comparison parameter is determined by comparing the reference signal with a desired signal, andthe output signal is adjusted based on the comparison parameter.5. The distance measuring method according to claim 3 , wherein the reference signal is generated based on a transformation of at least part of the control signal claim 3 , wherein the frequency of the reference signal is lower than the ...

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Номер записи: 58
11-03-2021 дата публикации

OBJECT DETECTION USING RADAR

Номер: US20210072345A1
Автор: Lerner Arye, Menaker Yonattan, SHAPIRO Moshe
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Method and systems for object detection using a radar module are disclosed. Frames of range and doppler data are received from a radar module at sample time intervals. Doppler zero slice data is extracted from a current frame of the range and doppler data. A prediction of doppler zero slice data is maintained. The prediction of doppler zero slice data is based at least partly on doppler zero slice data from a previous frame of range and doppler data. Standard deviation data is determined based at least partly on prediction error data. The prediction error data relates to a difference between the prediction of doppler zero slice data and the doppler zero slice data. An object detection output is determined based on a comparison of the standard deviation data and an object detection threshold. 1. A method of object detection using a radar module , the method comprising:at least one processor receiving, from a radar module, frames of range and doppler data at sample time intervals, each frame of the range and doppler data comprising an array including range bins and doppler bins;the at least one processor extracting doppler zero slice data from a current frame of the range and doppler data, the doppler zero slice data corresponding to a zero doppler bin that has been extracted from remaining doppler bins in the range and doppler data and also corresponding to at least one range bin at a low-end distance range that has been extracted from remaining higher range bins in the range and doppler data;the at least one processor maintaining a prediction of doppler zero slice data, the prediction of doppler zero slice data based at least partly on doppler zero slice data from a previous frame of range and doppler data;the at least one processor determining standard deviation data based at least partly on prediction error data, the prediction error data related to a difference between the prediction of doppler zero slice data and the doppler zero slice data; andthe at least one ...

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Номер записи: 59
17-03-2016 дата публикации

Radar imaging via spatial spectrum measurement and MIMO waveforms

Номер: US20160077195A1
Автор: Donald C.D. Chang
Принадлежит: Spatial Digital Systems Inc

The proposed MIMO radar imaging method takes advantages of measurement techniques of spatial frequency components of an RF area image from radar returns. To minimize size, weight and power (SW&P), minimum redundancy arrays (MRAs) for both Tx and Rx with unique geometries are proposed. MIMO waveforms are utilized to index the radiated illuminations to a targeted area in the forms of 1-D spatial frequency components. Consequently, the corresponding radar returns from the targeted field of view (FOV) are captured by the Rx MRA. With the knowledge of uniquely designed MRA array geometries, virtual beams are synthesized in Rx processor; usually one Tx and many contiguous Rx fan beams. These virtual beams may be dynamically “moved” to different beam positions. The elongated beam direction for Tx fan beam and that for Rx fan beams are perpendicular to one another. Thus intersections of the Tx fan-beam and many Rx fan-beams are the very areas of radar returns. We refer those areas as virtual beam crosses. Conventional range and Doppler gating processing shall then be applied to the beam crosses concurrently. Radar return pixel-by-pixel within various beam crosses are measured individually. Radar images can then be synthesized. MIMO radars via spatial spectrum measurements are well suited for wide angle surveillance via improved angle estimation and minimum detectable velocity. SDS proposed MIMO radar design concepts on moving platforms can be used for both the line-of sight (LOS) SAR/GMTI applications. For fixed Radar, they are applicable for fixed radars LOS target detection and tracking, or imaging. They may also be useful for OTH maritime target detection and tracking utilizing evaporation duct propagation

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Номер записи: 60
15-03-2018 дата публикации

OBSTACLE DETECTION RADAR USING A PLOARIZATION TEST

Номер: US20180074166A1
Автор: Niv Haim, Slapak Alon
Принадлежит:

A system for detecting a target, the system comprises a transceiver and a signal processor; wherein the transceiver that is configured to: transmit a first pulse train that comprises multiple radio frequency (RF) pulses of a first non-linear polarity; receive first echoes resulting from the transmission of the first pulse train; generate first detection signals that represent the first echoes; and wherein the signal processor is configured to process the first detection signals to provide an estimated polarization orientation of a target; wherein the processing of the first detection signals comprises estimating a Jonas matrix of the target. 1. A system for detecting a target , the system comprises a transceiver and a signal processor;wherein the transceiver that is configured to:transmit a first pulse train that comprises multiple radio frequency (RF) pulses of a first non-linear polarity;receive first echoes resulting from the transmission of the first pulse train;generate first detection signals that represent the first echoes;wherein the signal processor is configured to process the first detection signals to provide an estimated polarization orientation of a target; wherein the processing of the first detection signals comprises estimating a Jonas matrix of the target.2. The system according to wherein the first detection signals represent different polarization components of the first echoes.3. The system according to wherein the transceiver is further configured to:transmit a second pulse train that comprises multiple radio frequency (RF) pulses of a linear polarity of a first polarization orientation that approximates the estimated polarization orientation of the target; receive second echoes resulting from the transmission of the second pulse train; and generate second detection signals that represent the second echoes; and wherein the signal processor is further configured to process the second detection signals.4. The system according to wherein the ...

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Номер записи: 61
15-03-2018 дата публикации

System and Method for Radar

Номер: US20180074173A1
Автор: Baheti Ashutosh, Bal Jagjit Singh, Jungmaier Reinhard Wolfgang, Nasr Ismail, Noppeney Dennis, Trotta Saverio
Принадлежит:

In accordance with an embodiment, a method of operating a radar system includes receiving radar configuration data from a host, and receiving a start command from the host after receiving the radar configuration data. The radar configuration data includes chirp parameters and frame sequence settings. After receiving the start command, configuring a frequency generation circuit is configured with the chirp parameters and radar frames are triggered at a preselected rate. 1. A method of operating a radar system , the method comprising:receiving radar configuration data from a host, the radar configuration data comprising chirp parameters and frame sequence settings;receiving a start command from the host after receiving the radar configuration data; and configuring a frequency generation circuit with the chirp parameters,', 'configuring a frame sequencer with the frame sequencer settings, and', 'triggering radar frames at a preselected rate., 'after receiving the start command,'}2. The method of claim 1 , further comprising:receiving a stop command from the host; andstopping triggering the radar frames upon receipt of the stop command.3. The method of claim 2 , further comprising powering down RF circuitry of the radar system upon receipt of the stop command.4. The method of claim 1 , further comprising powering up RF circuitry of the radar system upon receipt of the start command.5. The method of claim 1 , wherein triggering radar frames comprises:triggering a frequency generation circuit to generate a frequency ramp based on the chirp parameters;receiving samples from an analog-to-digital converter coupled to a receiver of the radar system; andsending the received samples to the host.6. The method of claim 5 , wherein triggering radar frames further comprises:enabling receive antennas and transmit antennas of the radar system at beginning of the radar frame; anddisabling the receive antennas and the transmit antennas of the radar system at end of the radar frame.7. A ...

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Номер записи: 62
15-03-2018 дата публикации

Ultrafast target detection based on microwave metamaterials

Номер: US20180074180A1
Автор: Michael Chung-Tse Wu
Принадлежит: WAYNE STATE UNIVERSITY

A system ( 100 ) for locating an object ( 114 ) includes a signal source ( 102 ) that generates a wideband signal ( 104 ) that includes a continuously variable frequency from a first frequency to a second frequency, a microwave metamaterial leaky wave antenna ( 106 ) that receives the wideband signal as an input and maps the wideband signal from the first frequency to the second frequency as electromagnetic radiation that increases as a function of an azimuthal direction ( 108,110,112 ), the microwave metamaterial leaky wave antenna ( 106 ) positionable to face toward an object that is within its field-of-view FOV, wherein the transceiver assembly is positioned to receive the electromagnetic radiation that is reflected from the object and convert the reflected electromagnetic radiation to a reflected electrical signal, and an analyzer ( 118 ) configured to identify a main beam frequency of the reflected electrical signal and determine an azimuthal angle ( 108,110,112 ) and distance to the object based on the main beam frequency.

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Номер записи: 63
15-03-2018 дата публикации

Radar device

Номер: US20180074181A1
Автор: Kiyotaka Kobayashi, Tadashi Morita, Takaaki Kishigami
Принадлежит: Panasonic Intellectual Property Management Co Ltd

A radar device includes: a transmission beam controller that selects, every first period, a transmission beam set used for transmission of a radar signal from among a plurality of transmission beam sets each including at least two transmission beam directions; and a radar transmitter that transmits the radar signal in a predetermined transmission period by using the selected transmission beam set, wherein the transmission beam controller switching, every second period within the first period, among the at least two transmission beam directions included in the transmission beam set.

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Номер записи: 64
15-03-2018 дата публикации

Multiple Ranges for Pulse Compression Radar

Номер: US20180074182A1
Автор: Chen Ee, LILBURN Lindsay, Phillips Roger
Принадлежит:

Various implementations described herein are directed to multiple ranges for pulse compression radar. In one implementation, a method may include transmitting a first burst for a first range using a pulse compression radar system, where the first burst comprises one or more first pulse signals. The method may also include transmitting a second burst for a second range using the pulse compression radar system after transmitting the first burst, where the second burst comprises one or more second pulse signals. The method may further include repeating a transmission of the first burst using the pulse compression radar system after transmitting the second burst. 1. A method , comprising:transmitting a first burst for a first range using a pulse compression radar system, wherein the first burst comprises one or more first pulse signals;transmitting a second burst for a second range using the pulse compression radar system after transmitting the first burst, wherein the second burst comprises one or more second pulse signals; andrepeating a transmission of the first burst using the pulse compression radar system after transmitting the second burst.2. The method of claim 1 , further comprising continuously transmitting the first burst and the second burst each at different azimuth angles of an antenna of the pulse compression radar system.3. The method of claim 1 , further comprising continuously repeating transmissions of the first burst and the second burst in an alternating format.4. The method of claim 1 , further comprising transmitting a third burst for a third range using the pulse compression radar system after transmitting the second burst and prior to repeating the transmission of the first burst claim 1 , wherein the third burst comprises one or more third pulse signals.5. The method of claim 4 , further comprising continuously repeating transmissions of the first burst claim 4 , the second burst claim 4 , and the third burst in a round-robin format.6. The ...

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Номер записи: 65
07-03-2019 дата публикации

Signal processing system and signal processing method for object detection or data transmission

Номер: US20190072640A1
Автор: Hsiang-Feng Chi
Принадлежит: Richwave Technology Corp

A signal processing system includes a transmission module and a receiving module. The transmission module generates and transmits a transmitted radio frequency signal according to a data signal and a first spread vector. The transmission module includes a spread spectrum unit, a digital-to-analog converter and a mixer. The spread spectrum unit generates a spread spectrum signal according to the data signal and the first spread vector. The digital-to-analog unit generates an analog signal according to the spread spectrum signal. The mixer mixes the analog signal and a carrier signal so as to generate the transmitted radio frequency signal. The receiving module receives a received radio frequency signal and a second spread vector so as to generate a spectrum despread signal and generate object detection information data accordingly. The received radio frequency signal is generated by having the transmitted radio frequency signal reflected by a measured object.

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Номер записи: 66
07-03-2019 дата публикации

Distance Measurement and tracking positioning apparatus and method formobile device

Номер: US20190072660A1
Автор: Gangzhi He, Jianfei Zhang, Lei Zhao, Liyuan LIU, Qiang Wang, Tao He, Wenlong Liao
Принадлежит: Cowa Robotic Co Ltd

The present invention provides an apparatus and a method for ranging, following and positioning of a mobile device. The apparatus includes an emitting unit, a receiving unit, and a computing unit. The emitting unit and the receiving unit are connected to the computing unit. The emitting unit is configured to emit a centimeter wave to an object to be followed. The receiving unit is configured to receive the centimeter wave. The computing unit is configured to calculate a distance between the mobile device and the object to be followed according to a time difference between emission of the centimeter wave and reception of the centimeter wave, and further calculate a movement distance according to the distance and a threshold distance difference. The present invention can be made waterproof and oil resistant. Compared with the technology using laser, the present invention better prevents measurement failure caused by permeability of the medium.

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Номер записи: 67
05-03-2020 дата публикации

RADAR DEVICE, MONITORING DEVICE, PHASE CONTROL CIRCUIT AND METHOD FOR MONITORING A SIGNAL PROCESSING CIRCUIT

Номер: US20200072942A1
Автор: GRESLEHNER-NIMMERVOLL Bernhard, Gstoettenbauer Bernhard, HESCHL Lukas, KOUTSOURADIS Evangelos, ONIC Alexander
Принадлежит: INFINEON TECHNOLOGIES AG

One example of a radar device includes a phase-locked loop for generating a radiofrequency signal. The phase-locked loop has a multi-modulus divider. The radar device furthermore comprises a delta-sigma modulator for generating a modulated signal for the multi-modulus divider, and a signal generator for generating an input signal for the delta-sigma modulator. The radar device has monitoring circuits, wherein a first monitoring circuit is configured to monitor a locked state of the phase-locked loop, a second monitoring circuit is configured to monitor the delta-sigma modulator, and a third monitoring circuit is configured to monitor the signal generator. 1. A radar device , comprising:a phase-locked loop configured to generate a radio frequency signal, wherein the phase-locked loop includes a multi-modulus divider;a delta-sigma modulator configured to generate a modulated signal for the multi-modulus divider;a signal generator configured to generate an input signal for the delta-sigma modulator;a first monitoring circuit configured to monitor a locked state of the phase-locked loop;a second monitoring circuit configured to monitor the delta-sigma modulator; anda third monitoring circuit configured to monitor the signal generator.2. The radar device as claimed in claim 1 , wherein the first monitoring circuit implements a first monitoring method claim 1 , the second monitoring circuit implements a second monitoring method different from the first monitoring method claim 1 , and the third monitoring circuit implements a third monitoring method different from the first monitoring method and the second monitoring method.3. The radar device as claimed in claim 1 , wherein the first monitoring circuit is configured to output first information that indicates an out-of-lock state of the phase-locked loop claim 1 , wherein the second monitoring circuit is configured to output second information that indicates an incorrect behavior of the delta-sigma modulator claim 1 , and ...

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Номер записи: 68
26-03-2015 дата публикации

Detection Techniques

Номер: US20150084805A1
Автор: Dawber William Nicholas
Принадлежит:

Some embodiments are directed to techniques that mitigate the problems of range walk where fast moving objects are detected using pulsed target detection systems having relatively long dwell times. A pulse generator for a pulsed target detection system controls generation of a series of pulses to be transmitted by the target detection system. The time between pulses and pulse characteristics are controlled such that any range migration due to target movement in the time between pulses of said series is substantially equal and opposite to any variation in range-Doppler coupling between the pulses due to said target movement. By controlling the transmitted pulses in this way, any potential variation in range cell due to target motion is offset by an equal and opposite variation in range-Doppler coupling, whatever the target radial velocity. The techniques are particularly applicable to radar systems. 1. A pulse controller for a pulsed target detection system , the pulse controller being configured to , in use , control generation of a series of pulses to be transmitted by the pulsed target detection system , wherein the time between pulses and pulse characteristics are controlled such that any range migration due to target movement in the time between pulses of said series is substantially equal and opposite to any variation in range-Doppler coupling between the pulses due to said target movement.2. The pulse controller as claimed in claim 1 , wherein each pulse has a time-varying frequency modulation.3. The pulse controller as claimed in claim 2 , wherein said pulse characteristics controlled comprise at least one of nominal pulse frequency claim 2 , pulse duration and applied frequency modulation.4. The pulse controller as claimed in claim 2 , wherein said time-varying frequency modulation comprises a substantially linear frequency chirp.6. The pulse controller as claimed in claim 1 , wherein the controller is configured to claim 1 , in use claim 1 , generate a ...

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Номер записи: 69
22-03-2018 дата публикации

METHOD FOR MEASURING A TIME OF FLIGHT

Номер: US20180081042A1
Автор: Mellot Pascal
Принадлежит:

A method of measuring the phase of a response signal relative to a periodic excitation signal, comprises the steps of producing for each cycle of the response signal two transitions synchronized to a clock and framing a reference point of the cycle; swapping the two transitions to confront them in turns to the cycles of the response signal; measuring the offsets of the confronted transitions relative to the respective reference points of the cycles; performing a delta-sigma modulation of the swapping rate of the two transitions based on the successive offsets; and producing a phase measurement based on the duty cycle of the swapping rate. 1. A method of determining a phase offset of a series of burst pulses relative to a periodic generator signal , the method comprising:selecting a first half-wave signal from a plurality of half-wave signals as a selected half-wave signal for a first burst of the series of burst pulses;determining, as a first count, a number of pulses occurring in the first burst and before a transition of the selected half-wave signal;determining, as a second count, a number of pulses occurring in the first burst and after the transition of the selected half-wave signal;determining a difference between the first count and the second count for the first burst;repeating determination of the first count, the second count, and the difference between the first count and the second count using the first half-wave signal for successive bursts of the series of burst pulses that follow the first burst;integrating the differences between the first count and the second count determined for the first burst and the successive bursts until an integral value reaches a first threshold;selecting a second half-wave signal from the plurality of half-wave signals as the selected half-wave signal in response to the integral value reaching the first threshold;determining the difference between the first count and the second count, based on the second half-wave signal, ...

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Номер записи: 70
14-03-2019 дата публикации

MIMO DETECTOR DEVICE USEFUL FOR AUTOMATED VEHICLES

Номер: US20190081663A1
Автор: Fu Kan
Принадлежит:

An illustrative example embodiment of a detector device includes a receiver configured to receive radiation comprising a plurality of codes. Each of the codes is associated with one of a plurality of transmissions and each of the codes is distinct from the other codes. A processor is configured to obtain information corresponding to at least one predetermined phase code spectrum for the codes, determine a demodulated signal spectrum of radiation received by the at least one receiver, determine at least one characteristic of the determined demodulated signal spectrum, adjust the at least one predetermined phase code spectrum based on the determined characteristic to generate an adjusted phase code spectrum, and refine the determined demodulated signal spectrum based on the adjusted phase code spectrum to generate a refined demodulated signal spectrum. 1. A detector device , comprising:at least one receiver configured to receive radiation comprising a plurality of codes, each of the codes being associated with one of a plurality of transmissions, each of the codes being distinct from the other codes; anda processor that is configured toobtain information corresponding to a predetermined phase code spectrum for the codes;determine a demodulated signal spectrum of radiation received by the at least one receiver;determine at least one preselected characteristic of the determined demodulated signal spectrum, wherein the at least one preselected characteristic of the determined demodulated signal spectrum is determined by determining at least a frequency value corresponding to a location of at least one peak in the determined demodulated signal spectrum of the received radiation;adjust the predetermined phase code spectrum based on the determined characteristic to generate an adjusted phase code spectrum; andrefine the determined demodulated signal spectrum based on the adjusted phase code spectrum to generate a refined demodulated signal spectrum.2. The detector device of ...

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Номер записи: 71
19-06-2014 дата публикации

Radar System and Control Method thereof

Номер: US20140168004A1
Автор: Cheng-Hsiung Hsu, Hsin-Lung HSIAO, I-Shan Chen, Trsung-Fu Hsu
Принадлежит: WISTRON NEWEB CORP

A radar system comprises a transmitting device comprising a reference frequency source, for generating a reference frequency signal; a direct-digital synthesizer, coupled to the reference frequency source, for generating a synthesized frequency signal according to the reference frequency signal; a phase lock loop, coupled to the direct-digital synthesizer, for converting the synthesized frequency signal to an output signal; a transmitting antenna, coupled to the phase lock loop, for emitting the output signal to the air; and a loop switch module, coupled to the phase lock loop, for switching the phase lock loop between an open loop mode and a closed loop mode; and at least one receiving device, for receiving at least one wireless signal, and processing the at least one wireless signal according to the output signal generated by the phase lock loop.

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Номер записи: 72
29-03-2018 дата публикации

RADAR DEVICE AND TARGET DETECTION METHOD FOR RADAR DEVICE

Номер: US20180088223A1
Автор: AOYAGI Yasushi, KUKITA Kodai, YANO Hiroyasu
Принадлежит:

[OBJECT] To surely remove a multi-order echo or interference from another radar apparatus 1. A radar apparatus transmitting pulse signals at predetermined repetition cycles and receiving and analyzing the pulse signals reflected by a target object to thereby detect the target object , the radar apparatus comprising:a setting means setting so that at least a part of the repetition cycles of the pulse signals is different;a detection means detecting a distance to the target object specified by the pulse signal; anda removal means removing the target object as an interference wave from another radar apparatus or clutter when the distance to the target object detected in the different repetition cycle or in a period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.2. The radar apparatus according to claim 1 , whereinthe setting means sets so that at least a part of the repetition cycles of the pulse signals is different and so that a sampling cycle at a time of sampling the pulse signal is constant, andthe removal means removes the target object as the clutter when the distance to the target object detected in the period subsequent to the different repetition cycle by the detection means and the distance to the target object detected in the period other than that by the detection means are different.3. The radar apparatus according to claim 2 , whereinthe setting means sets so that all the repetition cycles of the plurality of pulse signals existing in the sampling cycle are different.4. The radar apparatus according to claim 2 , whereinthe setting means sets the repetition cycles with a unit being the pulse signals continuing a predetermined times at the same repetition cycles, and sets so that the repetition cycle of at least a part of unit among the plurality of units is different.5. The radar apparatus according to any one of to claim ...

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Номер записи: 73
29-03-2018 дата публикации

BEAMFORMING TRAINING USING ECHOES OF AN OMNIDIRECTIONAL PULSE

Номер: US20180088225A1
Автор: KARLS Ingolf, Priale Olivares Camila
Принадлежит:

Methods and devices for estimating an angle between a transmitter and a receiver for beamforming are provided. A method includes, with an antenna element in a first device, transmitting an omnidirectional pulse and detecting an echo of the pulse reflected from a second device. An angle between the first device and the second device is estimated based at least on a characteristic of the echo. The method includes transmitting the angle to the second device for use in beamforming between the first device and the second device. 1. A device comprising a first antenna element , wherein the device is adapted for beamforming used in mobile communication , comprising: cause the first antenna element to transmit an omnidirectional pulse;', 'cause the first antenna element to detect an echo of the transmitted pulse reflected from a second device;', 'estimate an angle between the device and the second device based at least on a characteristic of the echo; and', 'cause the device to provide the angle to the second device for use in beamforming between the first device and the second device., 'angle estimator circuitry configured to2. The device of claim 1 , wherein the omnidirectional pulse comprises discrete coded waveforms.3. The device of claim 1 , further comprising:a second antenna element to be disposed a first distance from the first antenna element; cause the second antenna element to transmit the omnidirectional pulse simultaneously with the first antenna element;', 'cause the second antenna element to detect the echo;', 'estimate a second distance between the first antenna element and the second device;', 'estimate a third distance between the second antenna element and the second device; and', 'estimate the angle based on the first distance, the second distance, and the third distance., 'wherein the angle estimator circuitry is further configured to4. The device of claim 1 , wherein the angle estimator circuitry is configured to detect the echo based on reflection ...

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Номер записи: 74
21-03-2019 дата публикации

Single-beam radar level and velocity sensing

Номер: US20190086247A1
Автор: David L. Rick
Принадлежит: Hach Co

An embodiment provides a method for measuring velocity and depth of fluid flow in a channel, including: transmitting, using a transmitter, directed energy comprising a single energy beam slant-wise toward a surface of a fluid in a fluid channel producing a plurality of reflections, wherein the transmitting comprises modulating a frequency associated with the single energy beam; detecting, at a receiver, received signals from the plurality of reflections; and determining, based upon differences between parameters of the transmitted single energy beam and parameters of the received signals, the velocity of the fluid and the depth of the fluid. Other embodiments are described and claimed.

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Номер записи: 75
21-03-2019 дата публикации

VARIABLE RANGE AND FRAME-RATE RADAR OPERATION FOR AUTOMATED VEHICLE

Номер: US20190086529A1
Автор: BHATIA GAURAV, WEI JUNQING, Xu Wenda
Принадлежит:

A radar system for an automated vehicle includes a digital-map, a radar, and a controller. The digital-map indicates a characteristic of a roadway traveled by a host-vehicle. The radar detects objects proximate to the host-vehicle. The radar is equipped with a range-setting that is selectively variable. The controller is in communication with the digital-map and the radar. The controller is configured to select the range-setting of the radar based on the characteristic of the roadway. The characteristic may be based on speed-limit, road-shape (e.g. curve-radius), a horizon-distance, and/or an obstruction (e.g. hill, sign, or building). The radar may be equipped with a frame-rate-setting (i.e. pulse repetition frequency or PRF) that is selectively variable, and the controller may be further configured to select the frame-rate-setting based on the characteristic of the roadway. 1. A radar system comprising:a digital map that indicates a characteristic of a roadway traveled by a host-vehicle;a radar equipped with a range-setting or a frame-rate-setting or a pulse repetition frequency that is selectively variable; anda controller in communication with the digital map and the radar, the controller configured to select at least one of the range-setting or the frame-rate-setting or the pulse repetition setting of the radar based on the characteristic of the roadway.2. The system in accordance with claim 1 , wherein the system includes a location-detector that indicates a location of the host-vehicle on the digital map.3. The system in accordance with claim 1 , wherein the characteristic of the roadway is indicated by or based on a road-shape.4. The system in accordance with claim 1 , wherein the radar is equipped with the frame rate setting or the pulse repetition frequency that is selectively variable claim 1 , and the controller is further configured to select the frame-rate-setting or the pulse repetition frequency based on the characteristic of the roadway.5. The ...

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Номер записи: 76
30-03-2017 дата публикации

Apparatus and method for attenuating close-range radar signals in an automotive radar sensor

Номер: US20170090013A1
Автор: Dirk Klotzbuecher, Matthew Douglas Marple, Michael Paradie, Olof Hugo Eriksson, Walter Poiger
Принадлежит: Autoliv ASP Inc

A radar system and method include a first transmitted radar signal having a first frequency and a second transmitted radar signal having a second frequency different from the first frequency. A receiver receives reflected radar signals generated by reflection of the transmitted radar signals and generates receive signals indicative of the reflected radar signals, a first receive signal being indicative of a first reflected radar signal generated by reflection of the first transmitted radar signal, and a second receive signal being indicative of a second reflected radar signal generated by reflection of the second transmitted radar signal. A processor receives the first and second receive signals and computes a difference between the first and second receive signals to generate a difference signal, the processor processing the difference signal to provide radar information.

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Номер записи: 77
01-04-2021 дата публикации

RADAR DEVICE

Номер: US20210096211A1
Автор: KITSUKAWA Yusuke, Takahashi Toru
Принадлежит: Mitsubishi Electric Corporation

The transmission unit generates a transmission signal obtained by multiplying a linearly FM-modulated pulse signal by a first window function. The pulse compression unit divides a signal, which is obtained by multiplying a first reference signal obtained by multiplying the pulse signal by a second window function different from the first window function, by a complex conjugate part of a second reference signal obtained by multiplying the pulse signal by a third window function, which is a function independent of the second window function, by a complex conjugate part of the transmission signal, and uses this as a reference signal. Then, the pulse compression unit performs pulse compression on the received signal using the reference signal. 1. A radar device comprising:processing circuitry performing a process to:generate, as a radar wave, a transmission signal obtained by multiplying a linearly FM-modulated pulse signal by a first window function; andperform pulse compression on a received signal, which is a signal obtained by receiving a reflected wave from a target of the radar wave, using a reference signal, whereinthe process divides a signal, which is obtained by multiplying a first reference signal obtained by multiplying the pulse signal by a second window function different from the first window function, by a complex conjugate part of a second reference signal obtained by multiplying the pulse signal by a third window function, which is a function independent of and different from the second window function, by a complex conjugate part of the transmission signal, and uses a signal of the division result as the reference signal.2. (canceled)3. The radar device according to claim 1 , the process further comprising to: extract the transmission signal claim 1 , wherein the process generates the reference signal using the transmission signal extracted.4. The radar device according to claim 1 , wherein the process includes to amplify a transmission signal and to ...

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Номер записи: 78
01-04-2021 дата публикации

Power-Splitter-Based Virtual Array

Номер: US20210096233A1
Автор: Jadidian Jouya, LI Chunshu, Vahid Far Mohammad B.
Принадлежит:

During operation, a transmitter in an electronic device may provide, to a transmission path, an electrical signal. This electrical signal may be divided by the power splitter into a first output electrical signal in a first output transmission path and a second output electrical signal in a second output transmission path, which may result in transmitting of the first wireless signal and the second wireless signal by antennas. Because the second output transmission path may include a delay element that provides a delay, the second wireless signal may be delayed relative to the first wireless signal. Moreover, N radar receivers in the electronic device may receive first wireless-return signals corresponding to the first wireless signal and second wireless-return signals corresponding to the second wireless signal. These wireless-return signals may be combined to create a virtual array MIMO radar having an antenna aperture size of 2N. 1. An electronic device , comprising:a radar transmitter; and provide, from the radar transmitter, an electrical signal to the transmission path in the transmission circuit;', 'divide, using the power splitter, the electrical signal into a first output electrical signal in the first output transmission path and a second output electrical signal in the second output transmission path;', 'transmit, from the first antenna, a first wireless signal corresponding to the first output electrical signal; and', 'transmit, from the second antenna, a second wireless signal corresponding to the second output electrical signal., 'a transmission circuit communicatively coupled to the radar transmitter, wherein the transmission circuit comprises a transmission path that is divided by a power splitter into a first output transmission path and a second output transmission path, wherein the second output transmission path comprises a delay element configured to provide a delay period, wherein the first output transmission path is communicatively coupled to ...

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Номер записи: 79
01-04-2021 дата публикации

RADAR COORDINATION FOR MULTI-RADAR COEXISTENCE

Номер: US20210096234A1
Автор: GULATI Kapil, Li Junyi, MAZHER Khurram Usman
Принадлежит:

Disclosed are techniques for transmitting and receiving a plurality of encoded information bits on a radar signal. In an aspect, a transmitter radar generates a first set of modulated phase-coded symbols to convey the plurality of encoded information bits, generates a second set of modulated phase-coded symbols as reference symbols having a known phase modulation, phase codes a plurality of chirps of the radar signal according to the first and second sets of modulated phase-coded symbols, and transmits the plurality of chirps according to the phase coding. A receiver radar determines a phase difference between the receiver and transmitter radars based on a phase of the plurality of chirps, equalizes the phase based on the determined phase difference, determines a phase code of the first set of symbols based on the equalized phase, and decodes the encoded information bits based on the phase code of the first set of symbols. 1. An apparatus , comprising: generate a first set of phase-shift keying (PSK) modulated phase-coded symbols to convey a plurality of encoded information bits;', 'generate a second set of PSK modulated phase-coded symbols as reference symbols having a known phase modulation;', 'phase code a plurality of chirps of a radar signal according to the first set of PSK modulated phase-coded symbols and the second set of PSK modulated phase-coded symbols; and', 'transmit the plurality of chirps of the radar signal according to the phase coding., 'a transmitter radar configured to2. The apparatus of claim 1 , wherein a number of PSK modulated phase-coded symbols in the first set is equal to a number of the plurality of chirps of the radar signal minus a number of PSK modulated phase-coded symbols in the second set.3. The apparatus of claim 1 , wherein a number of the plurality of encoded information bits is represented as (Nc−Nc1)*Q claim 1 , wherein Nc is a number of the plurality of chirps of the radar signal claim 1 , Nc1 is a number of PSK modulated ...

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Номер записи: 80
28-03-2019 дата публикации

METHOD FOR MONITORING THE PERFORMANCE RANGE OF AN AUTOMOTIVE RADAR SYSTEM

Номер: US20190094338A1
Автор: Fischer Thomas
Принадлежит:

A method for monitoring the performance range of a radar system placed behind a portion of a vehicle including, in an operational mode, the steps of: transmitting a first signal in a high range resolution mode from the radar system through the portion of the vehicle; receiving a first return signal comprising a part of the first signal that is reflected by the portion of the vehicle at the radar system; measuring the first return signal; comparing the first return signal with a calibration return signal representative of a part of the first signal that is reflected by the portion of the vehicle in a calibration mode; determining the relative loss of transmission of the portion of the vehicle from the comparing step. 1. A method for monitoring the performance range of a radar system placed behind a portion of a vehicle comprising , in an operational mode , the steps of:transmitting a first signal in a high range resolution mode from the radar system through the portion of the vehicle;receiving a first return signal comprising a part of the first signal that is reflected by the portion of the vehicle at the radar system;measuring the first return signal;comparing the first return signal with a calibration return signal representative of a part of the first signal that is reflected by the portion of the vehicle in a calibration mode;determining the relative loss of transmission of the portion of the vehicle from the comparing step.2. The method according to characterized in thatthe step of measuring the first return signal comprises a step of measuring the first n range bins from the first return signal up to a predetermined maximum distance of the portion of the vehicle from the radar system; andthe step of comparing comprising a step of comparing the first n range bins with the predetermined first n range bins of the calibration return signal.3. The method according to claim 2 , wherein n is in the interval [1-10].4. The method according to claim 1 , wherein the step ...

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Номер записи: 81
28-03-2019 дата публикации

DISPERSIVE TARGET DETECTION

Номер: US20190094339A1
Автор: McCaughey Dennis, Pressnall James Steven, Sanyal Shantanu
Принадлежит: FirstGuard Technologies Corporation

A first multitude of frequency elements between a first lower frequency and a first upper frequency; and a second multitude of frequency elements between a second lower frequency and a second upper frequency are transmitted. The second lower frequency and the second upper are shifted from the first upper frequency by the first delta, respectively, by a delta frequency. A return signal is split into: a first return signal comprising a first in-phase component and a first quadrature phase component; and a second return signal comprising a second in-phase component and a second quadrature phase component. A combined return signal is generated by combining the first return signal and the second return signal phase shifted by the first delta frequency. A probability of a potential target is determined when the combined return signal exceeds a threshold. 1. A process comprising: i) a first frequency agile signal waveform comprising a first multitude of frequency elements between: a first lower frequency and a first upper frequency; and', (1) the second lower frequency is shifted from the first lower frequency by a first delta frequency; and', '(2) the second upper frequency is shifted from the first upper frequency by the first delta frequency;, 'ii) a second frequency agile signal waveform comprising a second multitude of frequency elements between a second lower frequency and a second upper frequency, wherein], 'a) transmitting a combined frequency agile signal waveform comprising a combination ofb) receiving a combined return signal; i) a first return signal comprising a first in-phase component and a first quadrature phase component;', 'ii) a second return signal comprising a second in-phase component and a second quadrature phase component;, 'c) splitting the combined return signal into at least the followingd) generating a second phase shifted return signal by phase shifting the second return signal by the first delta frequency;e) generating a combined return signal ...

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Номер записи: 82
26-03-2020 дата публикации

ANGLE OF ARRIVAL (AOA) POSITIONING METHOD AND SYSTEM FOR POSITIONAL FINDING AND TRACKING OBJECTS USING REDUCED ATTENUATION RF TECHNOLOGY

Номер: US20200100059A1
Автор: BUYNAK Michael John, Prevatt Truman
Принадлежит:

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival 1. A method for determining an elevation of a user equipment (UE) in communication with a wireless system , the method comprising:buffering a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with at least two antennas or four or more omnidirectional antennas, wherein a first antenna among the at least two antennas or the four or more omnidirectional antennas is displaced in a vertical direction with respect to a second antenna among the at least two antennas or other antennas among the four or more omnidirectional antennas;identifying the signals from each receive channel among the receive channels as previously known signals based on the buffered I/Q samples;based on the previously known signals from each receive channel determining an angle of arrival between a baseline of the at least two antennas or the four or more omnidirectional antennas and incident energy from the UE to at least two antennas or the four or more omnidirectional antennas, wherein determining the angle of arrival includes determining a sub-sample ...

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Номер записи: 83
02-04-2020 дата публикации

Radar apparatus and radar method

Номер: US20200103515A1
Автор: Hidekuni Yomo, Kenta Iwasa, Ryosuke Shiozaki, Takaaki Kishigami
Принадлежит: Panasonic Intellectual Property Management Co Ltd

A radar apparatus includes a plurality of transmission antennae and a radar transmitter that transmits transmission signals by using the plurality of transmission antennae. In a virtual reception array including a plurality of virtual antennae formed of a plurality of reception antennae and the plurality of transmission antennae, disposition positions of at least two of the virtual antennae are the same as each other, and, transmission intervals of the transmission signals that are sequentially transmitted from transmission antennae corresponding to the at least two virtual antennae among the plurality of transmission antennae are an equal interval.

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Номер записи: 84
09-06-2022 дата публикации

Authentication Management Through IMU and Radar

Номер: US20220180659A1
Автор: Alok Chandel, Artur Tsurkan, Brandon Barbello, Johan PRAG, Leonardo Giusti, Lucas Dupin Moreira Costa, Selim Flavio Cinek, Tyler Reed Kugler, Vignesh Sachidanandam
Принадлежит: Google LLC

This document describes techniques and systems for authentication management through IMU and radar. The techniques and systems use inertial sensor data from an inertial measurement unit (IMU) and/or radar data to manage authentication for a computing device. By so doing, the techniques conserve power, improve accuracy, or reduce latency relative to many common techniques and systems for computing-device authentication.

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Номер записи: 85
14-05-2015 дата публикации

Pulse signal setting device, radar apparatus, method and program of setting pulse signal

Номер: US20150130654A1
Автор: Akira Okunishi, Koji Dai
Принадлежит: Furuno Electric Co Ltd

A radar apparatus using a pulse pair method to quickly measure a relative speed of an object. The radar apparatus includes: A data acquirer that acquires data relating to a pulse width, a repetition frequency, and a highest staggered ratio; A staggered pattern output unit that outputs a specific staggered pattern in which a total of phase changes within a sweep range of the target of the pulse pairing can be approximated to zero, wherein each phase change is caused by the pulse pairing on a target object at a constant speed due to a difference between an average transmission interval and a transmission interval between transmissions within the sweep range; And a setter that sets the transmission interval of a pulse signal by using the pulse width, the repetition frequency, the highest staggered ratio, and the specific staggered pattern.

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Номер записи: 86
14-05-2015 дата публикации

Method and Apparatus for Enhanced Multi-Node Utilization of an Electromagnetic State Space

Номер: US20150130656A1
Автор: Brian Pierce, Charles T. Hansen, Harry Marr
Принадлежит: Raytheon Co

Methods and systems are provided for efficiently packing nodes within an electromagnetic state space.

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Номер записи: 87
25-08-2022 дата публикации

Methods and Apparatus for Characterising the Environment of a User Platform

Номер: US20220268909A1
Автор: Small David
Принадлежит:

Apparatus and methods are presented for characterising the environment of a user platform. In certain embodiments RF signals are transmitted and received through an antenna array having a plurality of elements activated in a predetermined sequence, and received signals are manipulated with round-trip path corrections to enhance the gain of the array in one or more directions. Objects in those directions are detected from the receipt of returns of transmitted signals, and the manipulated received signals processed to estimate range to those objects. In other embodiments RF signals transmitted by one or more external transmitters are received and manipulated to enhance the gain of a local antenna array or antenna arrays associated with the one or more transmitters to enhance the gain of the arrays in one or more directions. Objects in those directions are detected from the receipt of reflected signals from the transmitters, and the manipulated received signals processed to estimate range to those objects. 1. A method for characterising the environment of a user platform , said method comprising the steps of:generating a signal;transmitting said signal through spatially distributed antenna elements of an antenna array, said antenna elements being activated in a predetermined sequence for transmitting or receiving signals;applying to incoming signals received through the sequentially activated antenna elements, in substantial synchronisation with said predetermined sequence, phase or gain manipulations incorporating round-trip path corrections for said antenna array and selected for forming a reciprocal beam of said antenna array in a predetermined direction;accumulating the manipulated incoming signals over an integration period to form said reciprocal beam; andinferring the presence of an object in said predetermined direction based on the detection in said reciprocal beam of a return of the transmitted signal.2. The method according to claim 1 , wherein said phase or ...

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Номер записи: 88
25-04-2019 дата публикации

Below-noise after transmit (bat) chirp radar

Номер: US20190120932A1
Автор: Jason R. Smith, Peter Petre, Peter S. Wittenberg, Shankar Rao, Simon L. Haxton
Принадлежит: HRL LABORATORIES LLC

A radar system including a transmit antenna for transmitting a radio frequency (RF) signal or a radar signal and a receive antenna for receiving a plurality of reflected signals created by a plurality of targets reflecting the RF signal or radar signal. The reflected signals include noise. The radar system also includes an analog-to-digital converter (ADC) that digitizes or samples the reflected signals to provide a digitized or sampled noisy input signal. The radar system further includes a reservoir computer that receives the noisy input signal. The reservoir computer includes a time-varying reservoir and is configured to de-noise the noisy input signal and provide a range measurement for each of the plurality of targets.

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Номер записи: 89
27-05-2021 дата публикации

REDUCED COMPLEXITY FFT-BASED CORRELATION FOR AUTOMOTIVE RADAR

Номер: US20210156979A1
Автор: Bhagat Nikhilesh, Bordes Jean P., Borho Steve, Davis Curtis, Maher Monier, Rao Raghunath K.
Принадлежит:

A radar system including a transmitter configured for installation and use with the radar system and configured to transmit radio signals. The transmitted radio signals are defined by a spreading code. The radar system also includes a receiver configured for installation and use with the radar system and configured to receive radio signals that include transmitted radio signals transmitted by the transmitter and reflected from objects in an environment. The receiver is configured to convert the received radio signals into frequency domain received samples. The receiver is also configured to correlate the frequency domain received samples to detect object distance. 1. A radar system comprising:a transmitter configured for installation and use with the radar system, and configured to transmit radio signals, wherein the transmitted radio signals are defined by a spreading code; anda receiver configured for installation and use with the radar system, and configured to receive radio signals that include transmitted radio signals transmitted by the transmitter and reflected from objects in an environment;wherein the receiver is configured to convert the received radio signals into frequency domain received samples; andwherein the receiver is configured to correlate the frequency domain received samples to detect object distance.2. The radar system of claim 1 , wherein the receiver is configured to convert the received radio signals into digital received samples claim 1 , wherein the digital received samples are time domain received samples claim 1 , and wherein the receiver is configured to convert the received radio signals into frequency domain received samples by converting the digital received samples into the frequency domain received samples.3. The radar system of claim 2 , wherein the receiver is configured to correlate the frequency domain received samples by multiplying the frequency domain received samples with frequency domain samples associated with the ...

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Номер записи: 90
27-05-2021 дата публикации

Center Fed Open Ended Waveguide (OEWG) Antenna Arrays

Номер: US20210159607A1
Автор: Izadian Jamal, Lim Edwin
Принадлежит:

Example radar systems are presented herein. A radar system may include radiating elements configured to radiate electromagnetic energy and arranged symmetrically in a linear array. The radiating elements comprise a set of radiating doublets and a set of radiating singlets. The radar system also includes a waveguide configured to guide electromagnetic energy between each of the plurality of radiating elements and a waveguide feed. The waveguide feed is coupled to the second side of the waveguide at a center location between a first half of the plurality of radiating elements and a second half of the plurality of radiating elements. The waveguide feed is configured to transfer electromagnetic energy between the waveguide and a component external to the waveguides. The radar system may also include a power dividing network defined by the waveguide and configured to divide the electromagnetic energy transferred by the waveguide feed based on a taper profile. 1. An antenna system comprising:a first layer having a first portion of a feed waveguide coupled to a feed port;a second layer having a second portion of the feed waveguide and a first portion of a waveguide, wherein the first portion of the feed waveguide is coupled to the second portion of the feed waveguide such that the feed waveguide enables propagation of electromagnetic energy in a direction parallel to a seam between the first layer and the second layer, and wherein the second portion of the feed waveguide is coupled to the first portion of the waveguide; anda third layer having a second portion of the waveguide and one or more radiating elements coupled to the second portion of the waveguide.2. The antenna system of claim 1 , wherein the one or more radiating elements coupled to the second portion of the waveguide comprises:a set of radiating elements arranged in a linear array.3. The antenna system of claim 2 , wherein the set of radiating elements arranged in the linear array comprises:a first subset of ...

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Номер записи: 91
23-04-2020 дата публикации

Systems and methods for detecting physiological information using multi-modal sensors

Номер: US20200121214A1
Автор: Brian C. Holloway, David William Wine, Mary Neuman, Roderick A. Hyde
Принадлежит: Deep Science LLC, Intellectual Ventures Management LLC

A micro impulse radar (MIR) system includes a first sensor, a second sensor, and a control circuit. The first sensor includes a micro impulse radar (MIR) sensor configured to receive a plurality of radar returns corresponding to an MIR radar signal transmitted towards a subject. The second sensor is configured to detect sensor data regarding the subject. The control circuit is configured to calculate a physiological parameter of the subject based on the plurality of radar returns and the sensor data.

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Номер записи: 92
02-05-2019 дата публикации

Radar System For Detecting Profiles Of Objects, Particularly In A Vicinity Of A Machine Work Tool

Номер: US20190129001A1
Автор: CONWAY Simon, Roulston John
Принадлежит: CATERPILLAR SARL

A radar system is disclosed for detecting profiles of objects, particularly in a vicinity of a machine work tool. The radar system uses a direct digital synthesiser to generate an intermediate frequency off-set frequency. It also uses an up-converter comprising a quadrature mixer, single-side mixer or complex mixer to add the off-set frequency to the transmitted frequency. It further uses a down-converter in the receive path driven by the off-set frequency as a local oscillator. The radar system enables received information to be transferred to the intermediate frequency. This in turn can be sampled synchronously in such a way as to provide a complex data stream carrying amplitude and phase information. The radar system is implementable with a single transmit channel and a single receive channel. 2. The radar system of further comprising:{'sub': 'out', 'a first directional antenna configured to transmit the transmission signal RFinto the environment.'}3. The radar system of further comprising;{'sub': in', 'out, 'a second directional antenna configured to receive the received signal RFcorresponding to the transmission signal RFas reflected by the environment.'}4. The radar system of further comprising a digital printed circuit board (PCB) and an analogue PCB claim 1 , wherein:the digital PCB comprises some or all of:the master clock signal generator;the sampling frequency generator; andthe processor configured to receive the digitised output; andthe analogue PCB comprises some or all of:the transmission channel signal generator;the direct digital synthesiser;the up-converter;the down-converter; andthe digitiser.5. The radar system of wherein the digital PCB comprises a serial programmable interface by which data is transferred between the digital PCB and the analogue PCB and between the analogue PCB and the digital PCB.6. The radar system of wherein the digital PCB comprises an automatic gain controller configured to provide an automatic gain control signal to the ...

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Номер записи: 93
03-06-2021 дата публикации

METHOD AND SYSTEM FOR INTRA-PULSE FREQUENCY ESTIMATION AGAINST AGILE EMITTERS

Номер: US20210165087A1
Автор: Liechty Robert
Принадлежит:

A radar detection system that estimates the received pulse frequency of a pulse in a received radar signal using a signal transmit frequency or one that uses frequency agility during a pulse duration. The radar detector system may include a radar detector that receives the radar signal from an antenna or antenna array. The receiver may be channelized, and each channel path may include Gaussian bandpass filter(s) centered at a different frequencies. The system includes an extended range radar detector that receives the signal in the channels and processing logic that processes the detected channel signals to identify the pulse frequency of emitters with or without frequency agility during a pulse duration. The frequency estimates of the pulse are based on calibrated amplitude differences in adjacent channels. 1. A method for detecting frequency of a pulse in a radar signal , comprising:receiving the radar signal containing the pulse at a receiver;at the receiver, dividing the received radar signal into channels;applying a respective Gaussian bandpass filter to the signal in each channel to produce a filtered signal in each channel, wherein each Gaussian bandpass filter is centered at a different frequency from the other bandpass filters;for at least two of the channels, detecting the pulse in the filtered signals in the channels, including an amplitude of the pulse in the filtered signals; andbased on differences in the amplitudes of the pulses detected for the filtered signals in the at least two channels, estimating a pulse frequency of the pulse in the received radar signal.2. The method of where the estimating comprises obtaining a value from a look up table.3. The method of wherein the estimating comprises estimating the pulse frequency with a processor that is programmed to perform the estimating.4. The method of further comprising passing the received radar signal through a high pass filter.5. The method of further comprising passing the received radar signal ...

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Номер записи: 94
18-05-2017 дата публикации

BUFFER SAMPLE SIZE CONTROL FOR VARIABLE CHIRP RADAR

Номер: US20170139036A1
Автор: Ginsburg Brian, Nayyar Jasbir Singh
Принадлежит:

A method of radar signal processing includes providing an analog front end (AFE) including an amplifier coupled between an antenna and an ADC in a receive path, where an ADC output is coupled to an input of an elastic ADC buffer (elastic buffer) including a divided memory with for writing samples from the ADC (samples) while reading earlier written samples to a first signal processor by a high speed interface. A transmit path includes at least one power amplifier provided by the AFE coupled to drive an antenna. A Greatest Common Divisor (GCD) is determined across all chirps in a radar frame programmed to be used. For each frame a sample size for the elastic buffer is dynamically controlled constant to be equal to the GCD for reading samples from one memory block and writing samples to another memory block throughout all chirps in the frame. 1. A method of radar signal processing , comprising:providing an analog front end (AFE) including an amplifier coupled between at least one antenna and at least one analog-to digital converter (ADC) in a receive path, an output of said ADC coupled to an input of an elastic ADC buffer (elastic buffer) including a divided memory with at least 2 memory blocks for writing samples from said ADC (samples) while reading earlier written ones of said samples out to a first signal processor by a high speed interface (HSI), and a transmit path including at least one power amplifier provided by said AFE, said transmit path including a waveform generator for generating a waveform from received waveform data from said first or a second signal processor, said waveform generator having an output coupling said waveform to an input of said power amplifier that is coupled to drive at said antenna or another antenna;determining a Greatest Common Divisor (GCD) across a plurality of chirps in a radar signal frame (frame) programmed to be used, andfor each said frame, dynamically controlling a size for said samples (sample size) for said elastic buffer ...

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Номер записи: 95
08-09-2022 дата публикации

RADAR APPARATUS AND ANTENNA APPARATUS

Номер: US20220283281A1
Автор: Ishikawa Hiroki
Принадлежит:

A radar apparatus includes a transmission-reception antenna unit including a plurality of transmission antennas and a plurality of reception antennas along a predetermined array direction, which form a virtual array in which a plurality of virtual reception antennas are arranged along the array direction. Based on virtual reception signals received by the virtual reception antennas, the radar apparatus detects an object that reflects transmission signals, calculates a transmission phase difference between the transmission antennas of the transmission signals transmitted by the transmission antennas, and calculates a reception phase difference between the reception antennas of reception signals received by the reception antennas. The radar apparatus calculates a transmission-reception phase difference that is a difference between the calculated transmission phase difference and the calculated reception phase difference, and determines that the detected object is a ghost, in response to the calculated transmission-reception phase difference being greater than a predetermined phase threshold. 1. A radar apparatus comprising: a plurality of transmission antennas along a predetermined array direction, and', 'a plurality of reception antennas along the array direction,', 'the plurality of transmission antennas and the plurality of reception antennas forming a virtual array in which a plurality of virtual reception antennas are arranged along the array direction;, 'a transmission-reception antenna unit that includes'}an object detecting unit that is configured to detect an object that reflects transmission signals that are transmitted from the plurality of transmission antennas, based on a plurality of virtual reception signals that are received by the plurality of virtual reception antennas;a transmission phase difference calculating unit that is configured to calculate a transmission phase difference between the plurality of transmission antennas of the transmission ...

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Номер записи: 96
30-04-2020 дата публикации

Radar Sensor FSM Low Power Mode

Номер: US20200132808A1
Автор: Christoph Rumpler, Reinhard-Wolfgang Jungmaier, Saverio Trotta
Принадлежит: INFINEON TECHNOLOGIES AG

In an embodiment, a method of operating a radar includes: transmitting a radiation pulse with the radar during an active mode; asserting a sleep flag after transmitting the radiation pulse; turning off a crystal oscillator circuit of the radar after the sleep flag is asserted; clocking a counter of the radar with a low power oscillator during a low power mode after the sleep flag is asserted; asserting a timer flag when the counter reaches a first threshold; and transitioning into the active mode after the timer flag is asserted.

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Номер записи: 97
30-04-2020 дата публикации

METHOD FOR MEASURING A TIME OF FLIGHT

Номер: US20200132820A1
Автор: Mellot Pascal
Принадлежит:

A method of measuring the phase of a response signal relative to a periodic excitation signal, comprises the steps of producing for each cycle of the response signal two transitions synchronized to a clock and framing a reference point of the cycle; swapping the two transitions to confront them in turns to the cycles of the response signal; measuring the offsets of the confronted transitions relative to the respective reference points of the cycles; performing a delta-sigma modulation of the swapping rate of the two transitions based on the successive offsets; and producing a phase measurement based on the duty cycle of the swapping rate. 1. A digital circuit for determining a phase offset of a series of burst pulses relative to a periodic generator signal , the digital circuit comprising:a shift register configured to generate a plurality of half-wave signals, wherein each of the plurality of half-wave signals is time delayed relative to a reference half-wave signal, and wherein respective delays of the plurality of half-wave signals are different;a selection circuit configured to select one of a first half-wave signal or a second half-wave signal from the plurality of half-wave signals as a selected half-wave signal in response to a control signal received by the selection circuit;a plurality of counters configured to determine a number of pulses occurring before and after a transition of the selected half-wave signal for each burst of the series of burst pulses;a phase comparator configured to determine a difference between the number of pulses occurring before and after the transition of the selected half-wave signal for each burst of the series of burst pulses;an integrator configured to integrate successive difference between the number of pulses occurring before and after the transition of the selected half-wave signal until an integral value reaches a threshold;a control circuit configured to change a value of the control signal in response to the integral ...

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Номер записи: 98
30-04-2020 дата публикации

TARGET DETECTION DEVICE AND TARGET DETECTION METHOD

Номер: US20200132828A1
Автор: HARA Teruyuki, KAGEME Satoshi, MANIWA Kazuaki
Принадлежит: Mitsubishi Electric Corporation

Target detection units respectively performing detection processing of targets which are different in spatial extent from each other on the basis of a detection result of amplitude or power by a detection unit are provided, and at least one determination processing unit is configured to determine presence or absence of targets from a result of the detection processing of targets by the target detection units. As a result of this configuration, it is possible to detect a target even when it has a spatial extent. 1. A target detection device comprising: processing circuitry:to detect, by a detector, amplitude or power of a received signal of an electromagnetic wave reflected by a target;to perform, by a plurality of target detectors, respectively, detection processing of targets which are different in spatial extent from each other on a basis of a detection result of the amplitude or power by the detector unit; andto determine, by at least one determination processor, presence or absence of a target from a result of the detection processing of targets obtained by the plurality of target detectors,wherein weight values each corresponding to a spatial extent of a detectable target is set for the plurality of target detectors, respectively, andthe at least one determination processor determines presence or absence of a target by calculating, for the plurality of target detectors, multiplication values of the weight values set for the plurality of target detectors and detection values each indicating the result of the detection processing of a target by each of the plurality of target detectors, respectively, and by comparing a sum of the multiplication values of the weight values and the detection values of the plurality of target detectors and a target determination threshold.2. (canceled)3. The target detection device according to claim 1 , wherein each of the plurality of target detectors perform constant false alarm rate processing as the detection processing of a ...

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Номер записи: 99
09-05-2019 дата публикации

Method of Processing A Signal Formed of A Sequence of Pulses

Номер: US20190137615A1
Автор: COIGNET Eric, GRANDIN Jean-Francois, LEMOINE Jean-Marie
Принадлежит:

A method for processing a signal formed of a sequence of pulses, including at least one repetitive pattern formed of at least one pulse, the pattern being repeated in the signal with a pattern repetition period, the method including estimating the pattern repetition period of the signal and calculating, as a function of (i) an arrival date of each pulse with respect to a chosen reference arrival date, and (ii) the estimated pattern repetition period, a sequence of phases; thereafter, the method includes estimating, on the basis of the calculated sequence of phases, at least one phase value and an associated standard deviation, the phase value being associated with a phase moment representative of the repetitive pattern, and obtaining and utilizing parameters characterizing the digital signal by using the estimated phase values. 1. A method for processing a signal formed of a sequence of pulses , comprising at least one repeating pattern formed of at least one pulse , the pattern being repeated in the signal with a pattern repetition period , the method comprising:estimating the pattern repetition period of said signal;calculating a sequence of phases as a function of an arrival date of each pulse relative to a chosen reference arrival date and of the estimated pattern repetition period;from said calculated sequence of phases, estimating at least one phase value and an associated standard deviation, the phase value being associated with a phase moment representative of the repetitive pattern; andobtaining and exploiting characterization parameters of the signal by using the estimated phase values.2. The method according to claim 1 , comprising claim 1 , after said calculating a sequence of phases:building a histogram of phases; andextracting one or several peak(s) from the histogram, each peak being associated with a phase moment of the sequence of pulses.3. The method according to claim 2 , wherein said estimating a phase associated with a moment of the sequence of ...

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Номер записи: 100