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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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Применить Всего найдено 18858. Отображено 100.

05-01-2012 дата публикации

Method and system for inter-delay product test for signal degradation detection in a gnss receiver

Номер: US20120001798A1

Автор: Jason Goldberg

Принадлежит: Broadcom Corp

A GNSS enabled communication device receives GNSS signals from GNSS satellites. The resulting GNSS baseband signals may be concurrently correlated with GNSS acquisition codes. Inter-delay products for the received GNSS signals may be generated utilizing the correlation IQ samples. The inter-delay products are utilized to calculate either an open loop or a close-loop estimate for inter-delay phase coherence of the received GNSS signals. A test statistic, generated from the inter-delay products, may be compared with a preset or dynamically determined threshold value in order to detect or declare signal degradation effects in the received GNSS signals. The early and late delays for the inter-delay phase coherence may be generalized to two or more delays. In this regard, the correlation IQ samples may be utilized to generate a correlation matrix. Variations derived from the correlation matrix may be utilized to declare or detect signal degradation effects in the received GNSS signals.

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Номер записи: 1

09-02-2012 дата публикации

Navigation receiver

Номер: US20120032846A1

Автор: Cormac S. Conroy, Douglas Rowitch, Leonid Sheynblat, Liang Zhao, Michael Kohlmann, Paul A. Conflitti, Roger Brockenbrough

Принадлежит: Qualcomm Inc

The subject matter disclosed herein relates to a system and method for processing navigation signals received from multiple global navigation satellite systems (GNSS′). In a particular implementation, signals received from multiple GNSS′ may be processed in a single receiver channel.

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Номер записи: 2

08-03-2012 дата публикации

Apparatus and method for ultra-fast gnss initial positioning scheme with peer assistance, and recording medium thereof

Номер: US20120056781A1

Автор: Seung-Hyun Kong, Wooseok Nam

Принадлежит: Korea Advanced Institute of Science and Technology KAIST

A method and an apparatus for acquiring an ultra-fast global navigation satellite systems (GNSS) initial position with peer assistance are disclosed. The apparatus includes a communication unit configured to receive assistance generated using a distance from a master terminal to a slave terminal and frequency error of a counterpart's terminal, a communication signal system configured to immediately receive immediately necessary information of the assistance, a Global Positioning System (GPS) receiver configured to rapidly search for a GPS satellite signal using the assistance and continuously track the GPS satellite signal so as to extract a pseudorange, and a computation processor configured to compute the position of the slave terminal using the assistance and the pseudorange. By this configuration, it is possible to perform fast initial position measurement as compared to the existing A-GPS technique, achieve direct communication between two GPS receivers regardless of presence/absence of a mobile communication network, and solve various limitations of the A-GPS technique.

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Номер записи: 3

29-03-2012 дата публикации

Multi-Stage GLONASS/GPS Automatic Frequency Control

Номер: US20120075142A1

Автор: Hao Zhou, Qinfang Sun

Принадлежит: Qualcomm Atheros Inc

A method of providing automatic frequency control pull-in for efficient receipt of GLONASS bits is described. This method can include first determining whether a channel noise (CNo) is greater than or equal to a predetermined value. When the CNo is greater than or equal to the predetermined value, the pull-in can be performed using a first series of predetection integration periods (PDIs) with activated decision-directed flips (DDFs) until a 20 ms boundary of a GLONASS data bit is found. When the CNo is less than the predetermined value, the pull-in can be performed using a second series of PDIs with always deactivated DDFs. A similar method of providing automatic frequency control pull-in for efficient receipt of GPS bits is also described.

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Номер записи: 4

10-05-2012 дата публикации

Access point, mobile terminal, global navigation satellite system using the access point, and method of providing position information using the access point

Номер: US20120112960A1

Автор: In-One Joo, Sang-Uk Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

An access point (AP), a mobile terminal, a global navigation satellite system (GNSS), and a method of providing position information using the AP are provided. The AP may be equipped with or connected to a GNSS receiver, and the GNSS may precisely determine the position of the mobile terminal using auxiliary satellite navigation information that is generated by the GNSS receiver.

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Номер записи: 5

17-05-2012 дата публикации

Systems and methods for mobile terminal location verification

Номер: US20120122471A1

Автор: Keith J. Brodie, Per Kristian Enge, Sanjai Kohli

Принадлежит: Individual

Methods and systems for using W-code to extend anti-spoof capability to civilian GPS receivers for verifying locations of mobile terminals are disclosed. A system for verifying a reported location of a mobile terminal includes a receiver of the mobile terminal and a verification processor. The receiver processes the radio ranging signals to generate measured quantities related to the W-code to the verification processor. The receiver also provides the reported location of the mobile terminal to the verification processor. The verification processor generates expected quantities related to the W-code based on the reported location of the mobile terminal. The verification processor further compares the measured quantities related to the W-code to the expected quantities related to the W-code to verify the reported location of the mobile terminal.

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Номер записи: 6

17-05-2012 дата публикации

Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas

Номер: US20120122479A1

Автор: Jeffrey Thomas Martin, Lance Douglas Pitt, Leslie Johann Lamprecht

Принадлежит: TeleCommunication Systems Inc

Locating satellites (e.g., GPS) are culled into a preferred group having a longest dwell time based on a time passing through an ellipsoid arc path through a cone of space, and communicated to mobile devices within a particular region (e.g., serviced by a particular base station). The culled locating satellites may select those visible, or more preferably those locating satellites currently within a cone of space above the relevant base station are selected for communication by a mobile device within the service area of the base station. The inverted cone of space may be defined for each antenna structure for any given base station, and each has 360 degrees of coverage, or less than 360 degrees of coverage, with relevant locating satellites. Thus, cell sites may be specifically used as reference points for culling the ephemeris information used to expedite Assisted GPS location determinations.

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Номер записи: 7

31-05-2012 дата публикации

System and method for gnss in-band authenticated position determination

Номер: US20120133552A1

Автор: Ryan Haoyun Wu

Принадлежит: Sensis Corp

The present invention provides a system and method for determining the authenticity of reported positions of GNSS receivers, such as aircraft equipped with GPS positioning devices, and provides an in-band verification capability for GNSS positions by tasking one or more GNSS satellites as designated authentication support (DAS) satellites that transmit corrupted ephemeris data in a pseudo-random error corrupted C/A signal on the L1 band and GNSS receiver determine authentication ranges to the DAS satellites and transmit the DAS authentication ranges as part of their position report. The surveillance system can verify the authenticity by comparing the transmitted authentication ranges to true authentication ranges determined using actual ephemeris data and the known C/A code pseudo-random error for the DAS satellites.

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Номер записи: 8

07-06-2012 дата публикации

Synchronized Interference Mitigation Scheme for Heterogeneous Wireless Networks

Номер: US20120140690A1

Автор: Hui-Ling Lou, Jihwan P. Choi, Yakun Sun

Принадлежит: Marvell International Ltd

In a method of synchronizing time domain multiplexing interference mitigation schemes of at least a first, second, and third wireless communication link within a first, second, and third network, respectively, a first set of parameters defining a first set of time intervals is determined. The first set of time intervals is utilized to schedule transmissions of the first wireless communication link to reduce interference with transmissions of the second wireless communication link. A second set of parameters defining a second set of time intervals is determined. The second set of time intervals is utilized to schedule transmissions of the first wireless communication link to reduce interference with transmissions of the third wireless communication link. The second set of parameters is determined based at least in part on at least one of the first set of parameters.

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Номер записи: 9

21-06-2012 дата публикации

GNSS Signal Processing to Estimate Orbits

Номер: US20120154210A1

Автор: Herbert Landau, Markus Nitschke

Принадлежит: TRIMBLE NAVIGATION LTD

Methods and apparatus are described for processing a set of GNSS signal data derived from signals of GNSS satellites observed at reference station receivers, the data representing code observations and carrier observations on each of at least two carriers over multiple epochs, comprising: obtaining an orbit start vector comprising: a time sequence of predicted positions and predicted velocities for each satellite over a first interval, and the partial derivatives of the predicted positions and predicted velocities with respect to initial positions, initial velocities, force model parameters and Earth orientation parameters, obtaining ionospheric-free linear combinations of the code observations and the carrier observations for each satellite at multiple reference stations, and iteratively correcting the orbit start vector using at each epoch the ionospheric-free linear combinations and predicted Earth orientation parameters, as soon as the ionspheric-free linear combinations of the epoch are available, to obtain updated orbit start vector values comprising a time sequence of predicted positions and predicted velocities for each satellite over a subsequent interval of epochs and an estimate of Earth orientation parameters.

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Номер записи: 10

21-06-2012 дата публикации

Receive Diversity in GNSS Receivers

Номер: US20120154212A1

Автор: Douglas Neal Rowitch, Emilija M. Simic, Sundar Raman

Принадлежит: Qualcomm Inc

The subject matter disclosed herein relates to receiving one or more SPS signals at two or more physically separated antennae. In an aspect, signals from the physically separated antennae may be downconverted into complex digital signals that may undergo further processing to improve one or more performance metrics related to position estimation operations, for example.

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Номер записи: 11

12-07-2012 дата публикации

Gps pre-aquisition for geotagging digital photos

Номер: US20120176510A1

Автор: David Noel Vanden Heuvel, Ngoc Bich Ngo, Piotr Konrad Tysowski

Принадлежит: Research in Motion Ltd

A handheld electronic device, such as a GPS-enabled wireless communications device with an embedded camera, a GPS-enabled camera-phone or a GPS-enabled digital camera, determines whether ephemeris data needs to be obtained for geotagging digital photos taken with the device. By monitoring user activity with respect to the camera, such as activation of the camera, the device can begin pre-acquisition of a GPS position fix by obtaining needed ephemeris data before the photograph is actually taken. This GPS pre-acquisition improves the likelihood that a position fix (GPS lock) is achieved by the time the photo is taken (to enable immediate geotagging). Alternatively, the photo can be geotagged retroactively by appending the current location to the metadata tag associated with the digital photo. An optional acquisition status indicator can be displayed on a user interface of the device to indicate that a position fix is being obtained.

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Номер записи: 12

02-08-2012 дата публикации

Temperature Compensating Device and Satellite Signal Receiving System

Номер: US20120194380A1

Автор: Chen-Chia Huang, Cho-Hsuan Wu, Chun-Ching Wang

Принадлежит: Individual

A temperature compensating device for providing active bias for an amplifier includes a voltage source, a plurality of loads, and a current generator for generating a current for the amplifier according to voltages provided by the voltage source and the plurality of loads, wherein a first load of the plurality of loads is a thermistor utilized for keeping the current within a specified range under a plurality of ambient temperatures.

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Номер записи: 13

16-08-2012 дата публикации

Use of self and neighboring vehicle gps/gnss data to estimate current and approaching sky visibility changes

Номер: US20120209519A1

Автор: Chaminda Basnayake

Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method and system for creating a sky visibility map, using data from a vehicle and its neighbors. A host vehicle with satellite-based navigation capability measures the quality of signals it receives from available satellites, where azimuth and elevation angles of the satellites are known from an ephemeris or almanac. The host vehicle also receives satellite signal data from surrounding vehicles via vehicle-to-vehicle communication. Using data from all of the vehicles, a sky visibility map is constructed, indicating where obstructions to satellite visibility exist for different locations. The sky visibility map is used to anticipate satellite signal quality. A driving environment classification can be used to configure other vehicle systems. The sky visibility map can also be constructed without using data from surrounding vehicles; the host vehicle can store its satellite signal data long-term and use it to estimate satellite visibility when returning to a location previously visited.

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Номер записи: 14

30-08-2012 дата публикации

Precise Absolute Time Transfer From A Satellite System

Номер: US20120218147A1

Автор: David A. Whelan, Gregory M. Gutt

Принадлежит: Boeing Co

Various techniques are provided for obtaining a precise absolute time using a satellite system. In one example, a method of transferring precise absolute time from a satellite to a device includes receiving data from a messaging channel, wherein the data has a frame structure. The method also includes using the data to identify the satellite and a position of the satellite, correcting for signal time of flight using the satellite identity and the position, and using the data as a time reference to align a receiver clock to the frame structure. The method also includes, with the receiver clock aligned to the frame structure, receiving a precision time signal from the satellite, wherein the precision time signal comprises a periodic repeating code. The method also includes determining a timing phase of the code and using the timing phase to determine a precise absolute time.

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Номер записи: 15

13-09-2012 дата публикации

Method and Apparatus for Enhanced Autonomous GPS

Номер: US20120229335A1

Автор: Charles Abraham, Frank van Diggelen, Sergei Podshivalov

Принадлежит: Broadcom Corp, Global Locate Inc

Method and apparatus for locating position of a remote receiver is described. In one example, long term satellite tracking data is obtained at a remote receiver. Satellite positioning system (SPS) satellites are detected. Pseudoranges are determined from the remote receiver to the detected SPS satellites. Position of the remote receiver is computed using the pseudoranges and the long term satellite tracking data. SPS satellites may be detected using at least one of acquisition assistance data computed using a previously computed position and a blind search. Use of long term satellite tracking data obviates the need for the remote receiver to decode ephemeris from the satellites. In addition, position of the remote receiver is computed without obtaining an initial position estimate from a server or network.

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Номер записи: 16

22-11-2012 дата публикации

System, method and computer program for ultra fast time to first fix for a gnss receiver

Номер: US20120293366A1

Автор: Francis Yuen, Zhe Liu

Принадлежит: BASEBAND Tech Inc

The present invention provides a system, method and computer program for a GNSS receiver that is operable to provide an ultra fast Time To First Fix (TTFF). The invention is implementable without requiring the decoding of a navigation message transmitted by GNSS satellite systems. The system of the present invention may comprise a parameter obtaining means, a clock obtaining means and a Fast TTFF engine. The parameter obtaining means may obtain satellite parameters of one or more GNSS satellites. The clock obtaining means may obtain a clock for estimating a GNSS time tag. The Fast TTFF engine may be linkable to a signal interface that is operable to provide I/Q samples from a GNSS antenna. The Fast TTFF engine may comprise a measurement generation utility, a coarse search utility and a fine search utility. The measurement generation utility may compute the Doppler frequency shift and the code phase of the one or more GNSS satellites based on the I/Q samples.

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Номер записи: 17

22-11-2012 дата публикации

System, method and computer program for navigation data bit synchronization for a gnss receiver

Номер: US20120293369A1

Автор: Francis Yuen, Zhe Liu

Принадлежит: BASEBAND Tech Inc

The present invention relates to navigation data bit synchronization for a GNSS receiver and more specifically to a software-based GNSS receiver that is operable to rapidly achieve accurate navigation data bit synchronization. It provides a system, method and computer program for navigation data bit synchronization for a GNSS receiver. The system comprises a navigation bit synchronization engine operable to detect one or more indicators in one or more data samples received from a GNSS satellite. The location of the navigation bit is derivable from the one or more indicators. The bit synchronization engine may include one or more of (i) a coarse search utility, (ii) a regular search utility, (iii) a fine search utility and (iv) a bit-edge prediction utility.

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Номер записи: 18

29-11-2012 дата публикации

System and/or method for reducing ambiguities in received SPS signals

Номер: US20120300885A1

Автор: Dominic Gerard Farmer, Rayman Wai Pon

Принадлежит: Qualcomm Inc

The subject matter disclosed herein relates to a system and method for resolving ambiguities associated with signals received from space vehicles (SVs) in a satellite navigation system.

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Номер записи: 19

20-12-2012 дата публикации

Method of detecting multipath, gnss receiving apparatus , and mobile terminal

Номер: US20120319898A1

Автор: Takaki Tominaga, Takuji Yasumoto

Принадлежит: Furuno Electric Co Ltd

An existence of multipath is detected accurately based on not only a C/No. A C/No (iv) of a reception signal, a pseudorange PR(iv), and a delta range DR(iv) are acquired (S 101 ). First, as determination processing based on individual measurement values, thresholds are set thereto respectively, and the existence of multipath is detected (S 102 -S 104 ). Next, as determination processing based on continuous values, an average value C/No(Av) and a standard deviation σ C/No of the C/No, and an average value DV(Av) and a standard deviation σ DV of the difference values are calculated, thresholds are similarly set thereto respectively, and the existence of multipath is determined (S 105 -S 109 ). Then, if multipath is determined that it does not exist based on the individual measurement values and the continuous values, it is determined ultimately that multipath does not exist (S 110 ).

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Номер записи: 20

17-01-2013 дата публикации

Remote visualization of band-spectrum interference for a global navigation satellite system receiver

Номер: US20130016006A1

Автор: Javad Ashjaee, Sergey Yudanov

Принадлежит: Individual

An apparatus for determining signal strength data within allocated GNSS frequency band(s) is provided. The apparatus includes a GNSS antenna. The GNSS antenna receives signals within the allocated GNSS frequency band. The apparatus further includes receiving circuitry. The receiving circuitry is for demodulating the received signals. The apparatus further includes a processor and memory for storing instructions, executable by the processor. The instructions include instructions for generating signal strength data for the received signals within the GNSS allocated frequency based on the demodulated signals, and for determining a position for a point of interest based upon the demodulated signals. Included in the apparatus is a display screen for displaying a graphical representation of the signal strength data of at least a portion of the at least one GNSS allocated frequency band. The graphical representation identifies interference within at least the portion of the at least one GNSS allocated frequency band.

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Номер записи: 21

21-02-2013 дата публикации

Wireless apparatus and processing method thereof

Номер: US20130044839A1

Автор: Kun-Sui HOU

Принадлежит: Realtek Semiconductor Corp

The present invention relates to a wireless apparatus and the processing method thereof. The wireless apparatus according to the present invention comprises a demodulating circuit, a computing circuit, and a compensating circuit. The demodulating circuit receives and demodulates an input signal for producing a baseband signal. The computing circuit is coupled to the demodulating circuit and receives the baseband signal. It performs inner product on the baseband signal for producing an output signal. The compensating circuit is coupled to the computing circuit, and produces and transmits a compensation signal to the demodulating circuit according to the output signal for adjusting the demodulating circuit. Accordingly, by means of the computing circuit according to the present invention, erroneous outputs sent to the compensation circuit due to erroneous judgment of a signal received with large frequency deviation can he avoided effectively, and hence enhancing the efficiency of the wireless apparatus.

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Номер записи: 22

21-03-2013 дата публикации

Dynamic location of a subordinate user

Номер: US20130073966A1

Автор: Andrew Ivar Erickson, Barry Appelman, Larry L. Lu, Robert Eugene Weltman

Принадлежит: Facebook Inc

Providing location information to a supervisory user includes providing a parental control, using a computer automatically to determine a location of a subordinate user, and storing location information indicative of the location of the subordinate user in a database. A request of the supervisory user to locate the subordinate user is received and a user interface informs the supervisory user of the location of the subordinate user based on the stored location information. At least one of the storing and/or the informing are based on the parental control.

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Номер записи: 23

21-03-2013 дата публикации

Dynamic location of a subordinate user

Номер: US20130073968A1

Автор: Andrew Ivar Erickson, Barry Appelman, Larry L. Lu, Robert Eugene Weltman

Принадлежит: Facebook Inc

Providing location information to a supervisory user includes providing a parental control, using a computer automatically to determine a location of a subordinate user, and storing location information indicative of the location of the subordinate user in a database. A request of the supervisory user to locate the subordinate user is received and a user interface informs the supervisory user of the location of the subordinate user based on the stored location information. At least one of the storing and/or the informing are based on the parental control.

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Номер записи: 24

11-04-2013 дата публикации

Method and system for locating interferences by frequency sub-band

Номер: US20130090078A1

Автор: Bruno Montagne, Franck Letestu, Nicolas Martin

Принадлежит: Thales SA

Method and system for locating sources interfering on a signal received by a receiver comprising an array of antennas, comprising the following steps: a step of calculating the spatio-temporal intercorrelation matrix R xx , a step of subdividing the useful band of the said signals into sub-bands (b), for each sub-band (b), a step of calculating the spatial intercorrelation matrix R(b) associated with the sub-band (b) and of calculating at least one of its eigenvalues {λ 1 , λ 2 , . . . λ M }, a step of detecting interference with the aid of the following detection criterion: log  ( ( ∑ m = k M  λ m )  /  ( M - k + 1 ) ) - log  ( ∏ m = k M  λ m )  /  ( M - k + 1 ) > threshold , a step of determining the eigenvectors {U 1 , U 2 , . . . U N } of the spatial intercorrelation matrix R(b), a step of determining the directions of arrival of the interfering sources by searching for the vectors of relative gains belonging to the said interference sub-space or which are orthogonal to the orthogonal noise sub-space and complementary to the interference sub-space.

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Номер записи: 25

18-04-2013 дата публикации

DUAL FREQUENCY RECEIVER FOR SATELLITE BASED POSITIONING AND ASSOCIATED METHOD OF RECEPTION

Номер: US20130093620A1

Автор: REVOL Marc

Принадлежит: THALES

Dual-frequency (L, L) receiver for satellite-based positioning, comprising a main measurement channel (L) and a secondary channel (L) for a calculation for correction of ionospheric propagation robust to differential errors linked to the local reception environment of the signals, each channel comprising a code generator, a carrier phase generator, integrators, phase and code discriminators, a code phase numerically-controlled oscillator (NCOC), a carrier phase numerically-controlled oscillator (NCOP), carrier phase loop matched filtering means, and code phase loop matched filtering means, comprising, furthermore: 11212. Dual-frequency (L , L) receiver for satellite-based positioning , comprising a main measurement channel (L) and a secondary channel (L) for a calculation for correction of ionospheric propagation robust to differential phase errors linked to the local reception environment of the signals , each channel comprising a code phase generator , a carrier phase generator , integrators , phase and code discriminators , a code phase numerically-controlled oscillator (NCOC) , a carrier phase numerically-controlled oscillator (NCOP) , carrier phase loop matched filtering means , and code phase loop matched filtering means , characterized in that it comprises:{'b': 3', '3', '1', '2, 'means for determining the respective code and carrier phase errors in the said main and secondary channels comprising means of interspectral correlation (INT, M) of the signals of the main and secondary channels (L, L) already correlated by the local code, after frequency compensation of the relative Doppler shifts of the said signals; and'}{'b': 1', '2, 'respective feedback loops (B, B) for the said code and carrier phase errors in the said main and secondary channels.'}23312. Receiver according to claim 1 , in which the said determination means comprise means for compensating for the output signal of the said dedicated means of interspectral correlation (INT claim 1 , M) by the ...

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Номер записи: 26

18-04-2013 дата публикации

RECEIVING DEVICE, RECEIVING METHOD AND MOBILE TERMINAL

Номер: US20130093621A1

Автор: Awata Hideki, Takahashi Hideki, TANAKA Katsuyuki

Принадлежит: SONY CORPORATION

Provided is a receiving device, including a receiving unit that receives a signal from a satellite in a GPS, a frequency converting unit that converts a frequency of a reception signal received by the receiving unit into a predetermined IF, a synchronization acquiring unit that performs synchronization acquisition for detecting a phase of a spread code in the IF signal and detects a carrier frequency in the IF signal, a synchronization holding unit that assigns and sets the phase of the spread code and the carrier frequency detected by the synchronization acquiring unit to a plurality of channels, holds synchronization of the spread code and a carrier using the set phase of the spread code and the carrier frequency, and demodulates a message included in the IF signal, and a control unit that executes operation control including a positioning calculation using the message demodulated by the synchronization holding unit. 1. A receiving device , comprising:a receiving unit that receives a signal from a satellite in a Global Positioning System (GPS);a frequency converting unit that converts a frequency of a reception signal received by the receiving unit into a predetermined intermediate frequency (IF);a synchronization acquiring unit that performs synchronization acquisition for detecting a phase of a spread code in the IF signal converted by the frequency converting unit and detects a carrier frequency in the IF signal;a synchronization holding unit that assigns and sets the phase of the spread code detected by the synchronization acquiring unit and the carrier frequency detected by the synchronization acquiring unit to a plurality of channels that are independently provided for each satellite in order to correspond to a plurality of the satellites, holds synchronization of the spread code and a carrier using the set phase of the spread code and the carrier frequency, and demodulates a message included in the IF signal; anda control unit that executes operation ...

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Номер записи: 27

18-04-2013 дата публикации

Receiving device, receiving method, computer program, and portable terminal

Номер: US20130094541A1

Автор: Hideki Awata, Hideki Takahashi, Katsuyuki Tanaka

Принадлежит: Sony Corp

To provide a receiving device which is capable of reducing average power and peak power by holding pseudo synchronization of a satellite signal during a sleep period. Provided is a receiving device including a receiving unit for receiving a signal from a satellite, a frequency conversion unit for converting a frequency of the received signal into a predetermined intermediate frequency, a synchronization acquisition unit for carrying out synchronization acquisition and for detecting a carrier frequency, and a synchronization holding unit for assigning and setting, per satellite, a phase of the spread code and the carrier frequency to each of a plurality of channels independently provided in a corresponding manner to a plurality of the satellites to synchronously hold the spread code and a carrier and also for demodulating a message included in the intermediate frequency. The synchronization holding unit includes a spreading code generation unit for generating a spreading code synchronized with the spread code, and in a sleep period in which a positioning operation is not carried out, the synchronization holding unit causes only the spreading code generation unit to operate and a counter that the synchronization holding unit refers to also operates.

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Номер записи: 28

18-04-2013 дата публикации

Method and Apparatus for Testing Received Signals in a Radio Signal Positioning System

Номер: US20130096861A1

Автор: Belloni Fabio, Kainulainen Antti, Ranki Ville

Принадлежит:

A method including receiving signals associated with multiple antenna elements; obtaining a parameter of the received signals for at least some of the multiple antenna elements; testing the obtained parameters; if the test fails, rejecting the received signals for use in positioning the apparatus; if the test passes, using the received signals for positioning the apparatus. 1. A method comprising:receiving signals associated with multiple antenna elements;obtaining a parameter of a subset of the received signals for at least some of the multiple antenna elements; andtesting the obtained parameters;if the test fails, rejecting the received signals for use in positioning an apparatus to be positioned; andif the test passes, using the received signals to determine a three-dimensional bearing of the apparatus from a first location.2. A method as claimed in claim 1 , wherein the parameter is dependent upon signal strength.3. A method as claimed in claim 1 , wherein the parameter is received power.4. A method as claimed in claim 1 , wherein the obtained parameter is independent of polarization of the received signals.5. A method as claimed in claim 1 , wherein the testing detects whether the parameters satisfy a defined relationship.6. A method as claimed in claim 1 , wherein the multiple antenna elements define a reception volume and a test pass is indicative that a source of the received signals is within the reception volume.7. A method as claimed in claim 1 , wherein the multiple antenna elements define a reception volume and a test fail is indicative that a source of the received signals is outside the reception volume.8. A method as claimed in claim 1 , wherein testing compares the parameter for a reference antenna element against the parameter for one or more other antenna elements and the comparison has a first characteristic for a test pass.9. A method as claimed in claim 1 , wherein testing compares the parameter for a reference antenna element against the ...

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Номер записи: 29

25-04-2013 дата публикации

Method and System for Extending the Usability Period of Long Term Orbit (LTO)

Номер: US20130099969A1

Автор: van DIGGELEN Frank

Принадлежит: BROADCOM CORPORATION

Aspects of a method and system for extending the usability period of long term orbit (LTO) are provided. A GPS enabled handset may receive LTO data from an AGPS server via a wireless communication network such as 3GPP or WiMAX. The GPS enabled handset may be enabled to receive broadcast GPS signals. The GPS enabled handset may extract navigation information from the received broadcast GPS signals to be used to adjust the received LTO data. The usability period of the received LTO data may be extended, accordingly. A clock model and a satellite health model associated with the extracted navigation information may be used to update or replace the clock model and/or the satellite health model of the received LTO data, respectively. A navigation solution for the GPS enabled handset may be determined more accurately based on the adjusted LTO data. 1. A method for wireless communication , the method comprising:receiving, from a server, satellite tracking data at a remote receiver;receiving a satellite broadcast signal at said remote receiver; andadjusting said received satellite tracking data based on said received satellite broadcast signal.2. The method of claim 1 , wherein said satellite tracking data is determined based on ephemeris data broadcast from a satellite and is valid longer in time than the ephemeris data broadcast from the satellite.3. The method according to claim 1 , further comprising receiving claim 1 , at said remote receiver claim 1 , said satellite tracking data a 3GPP signal claim 1 , a 3GPP Long Term Evolution (LTE) signal claim 1 , or a WiMAX signal.4. The method according to claim 1 , further comprising extending a usability period of said satellite tracking data based on navigation information extracted from said received satellite broadcast signal.5. The method according to claim 1 , further comprising extracting navigation information from said received satellite broadcast signal claim 1 , the extracted navigation information comprising ...

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Номер записи: 30

25-04-2013 дата публикации

Information processing apparatus, reception information server, information processing method, program, and recording medium

Номер: US20130099971A1

Автор: Tomohisa Takaoka

Принадлежит: Sony Corp

There is provided an information processing apparatus including a satellite positioning unit that performs positioning based on a positioning signal received from a positioning satellite, an environment information acquiring unit that acquires environment information unique to a current location, a reception information acquiring unit that acquires reception information indicating a state of the positioning signal at the current location based on the environment information, and an operation condition setting unit that sets an operation condition of the satellite positioning unit based on the reception information.

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Номер записи: 31

09-05-2013 дата публикации

METHOD OF REDUCING THE GLARE OF A RECEIVER RECEIVING SIGNALS FROM EMITTERS

Номер: US20130113656A1

Автор: Samama Nel, Vervisch-Picois Alexandre

Принадлежит: INSTITUT-TELECOM/TELECOM SUDPARIS

The present invention relates to a method of reducing the glare of at least one receiver within a positioning system, the system including a plurality of emitters, each emitter emitting signals modulated by one and the same code whose autocorrelation function exhibits a main peak and at least one white zone in which the autocorrelation function is a minimum, the signals for each emitter includes a first signal modulated by the code and a second signal out of phase with respect to the first signal, the second signal being modulated by the code which is delayed with respect to the code modulating the first signal, and a receiver, the latter being configured so as to detect signals emitted by the emitters and implementing, for the tracking of the first and second signal emitted by one of the emitters, a local signal modulated by the code. 2. The method as claimed in claim 1 , wherein the code used is a maximal length sequence code.3. The method as claimed in claim 1 , wherein claim 1 , for the emitters of the system claim 1 , the phase shift of the code modulating the first claim 1 , respectively second claim 1 , signal are chosen beforehand from one emitter to the next claim 1 , in such a way that the main correlation peak of the first signal and that of the second signal of each emitter are in a white region of the calculated correlation function for the correlation between the local signal and the signals emitted by all the other emitters of the system.4. The method as claimed in claim 3 , wherein the code phase shift between the code modulating the first signal emitted by one emitter and the code modulating the first signal emitted by another emitter is equal to the code phase shift between the code modulating the second signal emitted by said emitter and the code modulating the second signal emitted by the other emitter.5. The method as claimed in claim 1 , wherein the delay of the code modulating the second signal with respect to the code modulating the first ...

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Номер записи: 32

16-05-2013 дата публикации

DIFFERENTIALLY COHERENT STROBE CORRELATOR

Номер: US20130120189A1

Автор: Banh Nam Dieu

Принадлежит: CSR Technology Inc.

A GPS receiver for tracking a GPS signal. The receiver generates a mixed GPS signal by mixing the GPS signal with an oscillator signal, generates a first correlation signal by correlating the mixed GPS signal with a reference signal, and generates a filtered GPS signal from the GPS signal. The receiver also generates a filtered reference signal from the reference signal, generates a second correlation signal by correlating the filtered GPS signal with the filtered reference signal, and a generates a combined correlation signal by combining the first correlation signal with the second correlation signal. The receiver tracks the GPS signal by adjusting the phase of the oscillator signal based on the combined correlation signal. 1. A method of tracking a GPS signal , where a GPS receiver receives the GPS signal and tracks the GPS signal , the method comprising:mixing, by the GPS receiver, the GPS signal with an oscillator signal to generate a mixed GPS signal;correlating, by the GPS receiver, the mixed GPS signal with a reference signal to generate a first correlation signal;correlating, by the GPS receiver, the mixed GPS signal with the reference signal to generate a strobe correlation signal; andtracking, by the GPS receiver, the GPS signal by adjusting the phase of the oscillator signal based on the first correlation signal and the strobe correlation signal.2. The method of claim 1 , whereinto produce the first correlation signal, a T millisecond interval of the mixed GPS signal is respectively correlated with a T millisecond interval of one undelayed and N−1 delayed copies of the reference signal, andto produce the strobe correlation signal, the mixed GPS signal and reference signal are both filtered, and a T millisecond interval of the filtered mixed GPS signal is respectively correlated with a T millisecond interval of one undelayed and N−1 delayed copies of the filtered reference signal, where T>0 and N>0.3. The method of claim 1 , whereinthe mixed GPS signal is ...

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Номер записи: 33

23-05-2013 дата публикации

APPARATUS AND METHOD FOR GENERATING SATELLITE NAVIGATION SIGNAL BASED ON SOFTWARE

Номер: US20130127663A1

Автор: Kim Tae Hee, LEE Sang Uk

Принадлежит: Electronics and Telecommunications Research Institute

Provided is an apparatus and method for generating a satellite navigation signal, the method including: extracting, navigation data that is a parameter required to generate a navigation message; verifying visible satellites at a current position of a receiver based on a position of the receiver and positions of satellites calculated based on navigation data; calculating a pseudo distance from each visible satellite and a Doppler of each visible satellite; calculating, as a Doppler period, a duration of time corresponding to a Doppler displacement capable of being processed at the receiver; generating a navigation message frame to generate a satellite navigation signal, based on navigation data and a TOW; and generating a satellite navigation signal of a digitized IF for each visible satellite based on the navigation message frame, the pseudo distance for each visible satellite, and the Doppler for each visible satellite during the Doppler period. 1. An apparatus for generating a satellite navigation signal based on software , the apparatus comprising:an orbit data processing unit to calculate, based on receiver independent exchange format (RINEX) data, visible satellite information required to generate navigation data and a signal, a pseudo distance for each visible satellite, a Doppler for each visible satellite, and a Doppler period;a navigation message processing unit to generate, for each visible satellite based on the navigation data, a navigation message frame required to generate a satellite navigation signal; anda signal generating unit to generate a satellite navigation signal of a digitized intermediate frequency for each visible satellite based on the navigation message frame for each visible satellite, the pseudo distance for each visible satellite, and the Doppler for each visible satellite during the Doppler period.2. The apparatus of claim 1 , wherein the orbit data processing unit comprises:a RINEX converter to extract, from the RINEX data, the ...

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Номер записи: 34

23-05-2013 дата публикации

SPS Authentication

Номер: US20130127664A1

Автор: Lionel J. Garin

Принадлежит: Qualcomm Inc

Method and apparatus for SPS authentication, for example for use with GPS, are disclosed. The method may include receiving a first set of Y codes from a plurality of satellites, generating authentication decisions using W code estimates extracted from the first set of Y codes for satellite channels corresponding to the plurality of satellites, and generating an authentication response according to authentication decisions generated for the satellite channels.

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Номер записи: 35

30-05-2013 дата публикации

Systems and methods for ip and voip device location determination

Номер: US20130135147A1

Автор: Richard Keegan, Richard M. Lee

Принадлежит: Iposi Inc

A method and system for precise position determination of general Internet Protocol (IP) network-connected devices. A method enables use of remote intelligence located at strategic network points to distribute relevant assistance data to IP devices with embedded receivers. Assistance is tailored to provide physical timing, frequency and real time signal status data using general broadband communication protocols. Relevant assistance data enables several complementary forms of signal processing gain critical to acquire and measure weakened or distorted in-building Global Navigation Satellite Services (GNSS) signals and to ultimately extract corresponding pseudo-range time components. A method to assemble sets of GNSS measurements that are observed over long periods of time while using standard satellite navigation methods, and once compiled, convert using standard methods each pseudo-range into usable path distances used to calculate a precise geographic position to a known degree of accuracy.

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Номер записи: 36

30-05-2013 дата публикации

Method and System for Cross-Protocol Time Synchronization

Номер: US20130138826A1

Автор: Curtis Ling, Timothy Gallagher

Принадлежит: Individual

Methods and systems for cross-protocol time synchronization may comprise, for example in a premises-based network, receiving a signal that conforms to a first communications protocol (e.g., a general-purpose communications protocol), extracting a global time of day (GTOD) clock from the received signal; and synchronizing communication on the premises-based network in accordance with a second communication protocol, based at least in part on the extracted GTOD clock. The first communications protocol may comprise data over cable service interface specification (DOCSIS) or any protocol that provides a GTOD. The second communication protocol may comprise a multimedia over cable alliance (MoCA) standard, an IEEE 802.11x standard, or any non-public wireless network protocol. The GTOD clock may comprise a GPS clock, a GLONASS clock, and/or a Galileo clock. One or more of the networked devices may comprise a network controller, where the network controller comprises wireless network and wired network capability.

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Номер записи: 37

06-06-2013 дата публикации

POSITIONING SATELLITE SIGNAL RECEIVER, POSITIONING SATELLITE SIGNAL RECEIVING METHOD, AND COMPUTER READABLE STORAGE MEDIUM

Номер: US20130141279A1

Автор: SUZUKI Mitsuru

Принадлежит: Denso Corporation

A positioning signal receiver is disclosed. The receiver stores a correction table indicating a correspondence between a predetermined temperature and a drift amount of a frequency of a reference signal outputted from an oscillator unmounted in the receiver when the oscillator unmounted in the receiver has the predetermined temperature. The receiver further stores a specified frequency that is the frequency of the reference signal outputted from the oscillator incorporated into the receiver and having a specified temperature. The receiver estimates a drift amount of the frequency of the reference signal outputted from the oscillator incorporated into the receiver, based on a temperature data detected with a temperature sensor, the stored correction table and the stored specified frequency. 1. A receiver for receiving a positioning satellite signal from a positioning satellite , comprising:an oscillator that outputs a reference frequency signal used for down-converting the positioning satellite signal;a temperature sensor that detects temperature of the oscillator and provides a temperature data; a predetermined temperature and', 'a drift amount of a frequency of the reference frequency signal outputted from the oscillator unmounted in the receiver, wherein the drift amount stored in the correction table storage is an amount of change of a first frequency with respect to a second frequency, wherein the first frequency is the frequency of the reference frequency signal that is outputted from the oscillator unmounted in the receiver when the oscillator unmounted in the receiver has the predetermined temperature, wherein the second frequency is the frequency of the reference frequency signal outputted from the oscillator unmounted in the receiver when the oscillator unmounted in the receiver has a reference temperature;, 'a correction table storage that stores a correction table indicating a correspondence between'}a frequency storage that stores a specified frequency, ...

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Номер записи: 38

13-06-2013 дата публикации

Method for determining a change in a communication signal and using this information to improve sps signal reception and processing

Номер: US20130150079A1

Автор: Norman F. Krasner

Принадлежит: Qualcomm Inc

Methods and apparatuses for determining a position of a mobile satellite positioning system (SPS) receiver which is coupled to a communication receiver or transceiver. In one exemplary method, a change in a communication signal received by the communication receiver is determined. A parameter, based on the change, is determined, and SPS signals from SPS satellites are processed according to the parameter. According to further details of this method, the change involves the fluctuation of the level of the communication signal and the parameter is a motion information which specifies a frequency range for searching for SPS signals in the process of acquiring the SPS signals from SPS satellites. In an alternative embodiment the change in the communication signal is a change in the transmitted signal in response to power control commands. Apparatuses, such as a mobile communication system which includes an SPS receiver and a communication receiver, are also described.

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Номер записи: 39

20-06-2013 дата публикации

DIGITAL BEAMFORMING FOR SIMULTANEOUSLY MITIGATING WEAK AND STRONG INTERFERENCE IN A NAVIGATION SYSTEM

Номер: US20130154880A1

Автор: COSGROVE MATHEW A., DICKMAN JEFF

Принадлежит:

An adaptive cascaded electronic protection processing system for global navigation satellite system (GNSS) threat mitigation is provided. The system includes a precorrelation characterization component configured to provide at least one parameter characterizing a plurality of received signals. A correlator is configured to provide a plurality of correlation results, each representing one of the plurality of received signals. A spatial weight contribution component is configured to determine an optimal set of digital beam-forming weights via an optimization process according to the at least one parameter. A postcorrelation characterization component is configured to determine at least one constraint on the optimization process according to the plurality of correlation results. 1. An adaptive electronic protection system for a global navigation satellite system (GNSS) threat mitigation comprising:a precorrelation characterization component configured to provide at least one parameter characterizing a plurality of received signals;a correlator configured to provide a plurality of correlation results, each representing one of the plurality of received signals;a spatial weight computation component configured to determine an optimal set of digital beam-forming weights via an optimization process according to the at least one parameter; anda postcorrelation characterization component configured to determine at least one constraint on the optimization process according to the plurality of correlation results.2. The adaptive electronic protection processing system of claim 1 , wherein precorrelation characterization component provides a covariance matrix representing the plurality of received signals.3. The adaptive electronic protection processing system of claim 1 , the spatial weight computation component applying at least one constraint on the optimization process according to navigation data representing the position of at least one GNSS satellite.4. The adaptive ...

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Номер записи: 40

20-06-2013 дата публикации

Hydraulic shovel calibration device and hydraulic shovel calibration method

Номер: US20130158789A1

Автор: Masanobu Seki

Принадлежит: KOMATSU LTD

A hydraulic shovel calibration device is adapted to calibrate parameters in a hydraulic shovel including a current position computation unit configured to compute a current position of a working point included in a work tool of a hydraulic shovel based on a plurality of parameters that indicate dimensions and swing angles of a boom, an arm, and the work tool. The hydraulic shovel calibration device includes an input unit and a calibration computation unit. The input unit is configured and arranged to input working point position information indicating coordinates of a working point included in a work tool of the hydraulic shovel at a pluralty of positions which are measured by an external measurement device. The calibration computation unit is configured to compute calibration values of the parameters based on the working point position information input into the input unit.

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Номер записи: 41

27-06-2013 дата публикации

METHOD FOR DETERMINING A PROTECTION SPACE IN THE EVENT OF TWO SIMULTANEOUS SATELLITE FAILURES

Номер: US20130162472A1

Автор: Faurie Frederic, Giremus Audrey, Najim Mohamed

Принадлежит:

The present invention relates to a method for determining a protection space in the event of two faulty measurements of a pseudo-range between a satellite and a receiver for receiving signals transmitted by various satellites in a radio-navigation constellation, characterized in that said method includes the steps of: (a) determining, on the basis of the pseudo-ranges measured by the receiver, a test variable representative of the likelihood of a fault; (b) estimating, for each pair of pseudo-ranges from among the pseudo-ranges measured by the receiver and from the expression of the thus-obtained test variable, a set of minimum-bias pairs detectable for a given missed detection probability; (c) expressing, for each pair of pseudo-ranges, the estimated set of detectable minimum-bias pairs in the form of an equation defining an ellipse associated with the pair of pseudo-ranges in question; (d) expressing the equation of each ellipse in parametric coordinates and expressing each detectable associated minimum-bias pair on the basis of a single parameter; (e) projecting each of the thus-parameterized detectable minimum-bias pairs over at least one subspace of R3; (f) calculating, for each subspace and for each bias pair, the maximum position error induced by the bias pair; (g) selecting, for each subspace, the maximum from among all of the calculated maximum position errors, and transmitting the results of said selection outward. The present invention also relates to an integrity-monitoring system and to a vehicle therefor. 1. A method for determining a protection volume in the event of two faulty measurements of pseudorange between a satellite and a receiver receiving signals transmitted by different satellites of a radio-positioning constellation , characterised in that it comprises steps of:(a) Determining a test variable representative of the likelihood of a fault as a function of the pseudoranges measured by the receiver;(b) Estimating, for each pair of pseudoranges ...

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Номер записи: 42

27-06-2013 дата публикации

DUAL CIRCULARLY POLARIZED ANTENNA

Номер: US20130162473A1

Автор: Fear Elise, Johnston Ronald H.

Принадлежит: UTI LIMITED PARTNERSHIP

An antenna includes a waveguide having an aperture at a first end and a conducting component at a second end, the conducting component shorting the waveguide and a first set of two orthogonal dipoles, fed in quadrature, the orthogonal dipoles located near the aperture of the waveguide operating close to its dominant mode cut off frequency. 1. An antenna comprising:a waveguide having an aperture at a first end and a conducting component at a second end, the conducting component shorting the waveguide; anda first set of two orthogonal dipoles, fed in quadrature, the orthogonal dipoles located near the aperture of the waveguide operating close to its dominant mode cut off frequency.2. The antenna of further comprising:a second set of two orthogonal dipoles, connected in parallel to the first set of orthogonal dipoles, to resonate and match at a frequency band different from the first frequency.3. The antenna of wherein a connecting plate connects the two orthogonal dipoles to the conducting component.4. The antenna of wherein the two orthogonal dipoles are made of relatively thin conductors extending in a horizontal direction.5. The antenna of further comprising:one or more additional sets of two orthogonal dipoles wherein multiple sets of two orthogonal dipoles are mounted adjacent to each other and fed in parallel with each other.6. The antenna of wherein the orthogonal dipoles include signal feed structures that are positioned at or near the connecting plate.7. The antenna of wherein the signal feed structures are comprised of a component selected from the group consisting of microstrip lines claim 6 , striplines claim 6 , coplanar waveguides claim 6 , and miniature coaxial cables bonded to the connecting plate.8. The antenna of wherein the connecting plate has mounted thereon one or more components selected from the group consisting of LNAs (low noise amplifiers) claim 3 , matching circuits claim 3 , filters claim 3 , hybrid devices claim 3 , and combinations ...

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Номер записи: 43

27-06-2013 дата публикации

Antenna Selection for GNSS Receivers

Номер: US20130162477A1

Автор: Deric Wayne Waters, Tarkesh Pande

Принадлежит: Texas Instruments Inc

Embodiments of the invention provide a system and method to improve the performance of a GNSS receiver using antenna switching. The system has a plurality of antennas and at least one radio frequency RF chain. There are fewer RF chain(s) than antennas. A receiver processes a plurality of signals sent by a plurality of transmitters. The system also includes antenna switches and switch controller. The method includes processing signals from a plurality of satellite vehicles SVs using an antenna selected from a plurality of antennas.

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Номер записи: 44

04-07-2013 дата публикации

METHOD AND DEVICE FOR DETECTING AND EXCLUDING MULTIPLE SATELLITE FAILURES IN A GNSS SYSTEM

Номер: US20130169478A1

Автор: Vourch Sebastien

Принадлежит: SAGEM DEFENSE SECURITE

According to a first aspect, the invention relates to a method for checking the integrity of position information output by a satellite (GNSS) positioning device () including a bank () of Kalman filters each producing a navigation solution (dX, dXi, dXn) from raw measurements of signals transmitted by the satellites, characterized in that the method comprises the steps of, for each filter in the bank: (i) correcting the navigation solution produced by the filter according to an estimate of the impact of a failure of a satellite on the navigation solution; (ii) calculating a cross-innovation reflecting the deviation between an observation corresponding to a raw measurement from a satellite not used by the filter and an a posteriori estimate of said observation from the navigation solution produced by the filter and corrected in accordance with step (i); and (iii) performing a statistical test of the cross-innovation in order to declare whether or not the satellite, the raw measurement of which is not used by the filter, is faulty. 1130. A method for checking the integrity of pieces of position information delivered by a satellite positioning device () (GNSS) comprising a bank () of Kalman filters each elaborating a navigation solution (dX , dXi , dXn) from raw measurements of signals transmitted by satellites , characterized in that for each filter of the bank , it includes the steps of:(i) correcting the navigation solution elaborated by the filter according to an estimate of the impact of a failure of a satellite on the navigation solution;(ii) calculating a cross-innovation reflecting the deviation between an observation corresponding to a raw measurement from a satellite not used by the filter and an a posteriori estimate of said observation from the navigation solution elaborated by the filter and corrected according to step (i);(iii) conducting a statistical test of the cross-innovation in order to declare whether the satellite, for which the raw measurement is ...

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Номер записи: 45

11-07-2013 дата публикации

Information processing apparatus and method, and program storage medium

Номер: US20130176456A1

Автор: Hiroyuki Bando

Принадлежит: Sony Corp

Disclosed is an information processing method comprising the steps of: storing measured position information in association with first time information representing times of day at which the measured position information is obtained; storing video information in association with second time information representing times of day at which the video information is obtained; and associating the measured position information with the video information in accordance with degrees of difference between the first time information and the second time information.

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Номер записи: 46

18-07-2013 дата публикации

Autonomous orbit propagation system and method

Номер: US20130181866A1

Автор: Dave Cayer, Eric Derbez, Guylain Roy-MacHabee

Принадлежит: RX NETWORKS Inc

A method of predicting a location of a satellite is provided wherein the GPS device, based on previously received information about the position of a satellite, such as an ephemeris, generates a correction acceleration of the satellite that can be used to predict the position of the satellite outside of the time frame in which the previously received information was valid. The calculations can be performed entirely on the GPS device, and do not require assistance from a server. However, if assistance from a server is available to the GPS device, the assistance information can be used to increase the accuracy of the predicted position.

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Номер записи: 47

01-08-2013 дата публикации

SATELLITE RECEIVER AND SYSTEM EMPLOYING SERVER FOR IDENTIFYING SATELLITE STATE

Номер: US20130194132A1

Автор: CHUNG Do-Hyoung, Kim Woo-young, LEE Seung-Yoon

Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

Provided is a system and method for transmitting a satellite state to a satellite receiver to determine use or non-use of a satellite signal in positioning estimation. A satellite navigation system includes at least one satellite, a satellite control center for controlling the at least one satellite, and a server. The server transmits satellite state information about the at least one satellite identified through the satellite control center to the satellite receiver. The satellite receiver restricts the use of the satellite signal for positioning estimation when the satellite state is identified as erroneous. 1. A method operative in a satellite receiver , comprising:receiving satellite state information from a server;determining whether an erroneous satellite is present based on the satellite state information received from the server; andwhen at least one erroneous satellite is present, restricting the use of a satellite signal received from the at least one erroneous satellite.2. The method of claim 1 , wherein receiving the satellite state information includes:receiving extended ephemeris data from the server; andidentifying satellite state information included in the extended ephemeris data.3. The method of claim 1 , further comprising:prior to receiving the satellite state information from the server, receiving satellite state information from a transmitting satellite;determining whether the transmitting satellite is erroneous based on the satellite state information received from that satellite; andrestricting the use of a satellite signal received from the transmitting satellite when it is determined to be erroneous.4. The method of claim 1 , further comprising:prior to receiving the satellite state information from the server, determining whether a satellite state request event occurs; if so, requesting satellite state information from the server.5. The method of claim 4 , wherein determining whether the satellite state request event occurs is based on at ...

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Номер записи: 48

01-08-2013 дата публикации

Controlling fast acquisition hardware to pre-position a satellite to constrain baseband searches

Номер: US20130196592A1

Автор: Mike Vukas, Stephen Vickers

Принадлежит: Honeywell International Inc

A system of searching for and acquiring a satellite signal comprises a system controller, a receiver controller operatively coupled to the system controller and configured to identify one or more satellites for which a search is to be conducted, and a fast acquisition module in operative communication with the receiver controller. The fast acquisition module is configured to receive a satellite search request from the receiver controller and divide the search request into a plurality of smaller search space requests. A hardware search device is in operative communication with the fast acquisition module. The hardware search device is configured to conduct a search for a satellite based on one or more of the search space requests and send search results back to the fast acquisition module. A baseband processor is operatively coupled to the receiver controller and configured to track one or more satellites based on the search results.

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Номер записи: 49

08-08-2013 дата публикации

METHOD AND APPARATUS FOR POSITION DETERMINATION WITH EXTENDED SPS ORBIT INFORMATION

Номер: US20130201056A1

Автор: Biacs Zoltan, Gum Arnold Jason, Moeglein Mark Leo, Sheynblat Leonid, Wengler Michael James

Принадлежит: QUALCOMM Incorporation

A method and system for assisting mobile stations to locate a satellite use an efficient messaging format. A server computes a correction between coarse orbit data of a satellite and precise orbit data of the satellite. A coordinate system is chosen such that variation of the correction is substantially smooth over time. The server further approximates the correction with mathematical functions to reduce the number of bits necessary for transmission to a mobile station. The mobile station, upon receiving the coefficients, evaluates the mathematical functions using the coefficients and a time of applicability (e.g., the current time), converts the evaluated result to a standard coordinate system, and applies the conversion result to the coarse orbit data to obtain the precise orbit data. 1. A method by a mobile station of locating a satellite , the method comprising:receiving by the mobile station coarse orbit data of the satellite including a coarse estimate of the satellite's position;generating by the mobile station a coarse satellite position of the satellite using at least the coarse estimate of the satellite's position;receiving by the mobile station coarse orbit correction data of the satellite calculated using the coarse orbit data and predicted orbit data of the satellite, wherein the calculation of the coarse orbit correction data occurs at an entity geographically distinct from the mobile station, and wherein the predicted orbit data is more accurate than the coarse orbit data;reconstructing by the mobile station at least one spatial correction value to the coarse orbit data at least based on the coarse orbit correction data; anddetermining by the mobile station a corrected position of the satellite using the coarse satellite position of the satellite and the at least one spatial correction value, wherein the corrected position of the satellite is more accurate than the coarse satellite position.2. The method of claim 1 , wherein the coarse orbit data ...

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Номер записи: 50

08-08-2013 дата публикации

PROCESSING SATELLITE DATA FOR SLANT TOTAL ELECTRON CONTENT MEASUREMENTS

Номер: US20130201058A1

Автор: Komjathy Attila, Mannucci Anthony J., Stephens Philip John, Wilson Brian D.

Принадлежит: California Institute of Technology

A method, system, and apparatus provide the ability to estimate ionospheric observables using space-borne observations. Space-borne global positioning system (GPS) data of ionospheric delay are obtained from a satellite. The space-borne GPS data are combined with ground-based GPS observations. The combination is utilized in a model to estimate a global three-dimensional (3D) electron density field. 1. A method for estimating ionospheric observables using space-borne observations , comprising:obtaining space-borne global positioning system (GPS) data of ionospheric delay from a satellite;combining the space-borne GPS data with ground-based GPS observations; andutilizing the combination in a model to estimate a global three-dimensional (3D) electron density field.2. The method of claim 1 , wherein the space-borne GPS data is obtained via the Constellation Observing System for Meteorology claim 1 , Ionosphere and Climate (COSMIC).3. The method of claim 1 , wherein the utilizing comprises phase leveling the space-borne GPS data.4. The method of claim 3 , wherein the phase leveling comprises utilizing an unbiased level of a pseudorange code ionospheric observable to set a level of a carrier phase ionospheric observable.5. The method of claim 1 , wherein the utilizing comprises estimating a bias of a satellite and a receiver.6. The method of claim 5 , wherein the bias is estimated by taking cross correlations between multiple different ground based GPS measurements.7. The method of claim 5 , wherein the estimating the bias for the receiver comprises:tabulating a smallest measurement of an arc that passes through a filtered region of the ionosphere;averaging the smallest measurements over a course of a day; andsubtracting, from the average, a component for the ionosphere and plasmasphere contributions, to determine a daily bias for the receiver.8. The method of claim 7 , wherein the bias for the receiver comprises a 10-day running average of the daily biases.9. A system ...

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Номер записи: 51

08-08-2013 дата публикации

METHOD AND APPARATUS FOR POSITION DETERMINATION WITH EXTENDED SPS ORBIT INFORMATION

Номер: US20130201059A1

Автор: Biacs Zoltan F., Gum Arnold Jason, Moeglein Mark Leo, Sheynblat Leonid, Wengler Michael James

Принадлежит: QUALCOMM INCORPORATED

A method and system for assisting mobile stations to locate a satellite use an efficient messaging format. A server computes a correction between coarse orbit data of a satellite and precise orbit data of the satellite. A coordinate system is chosen such that variation of the correction is substantially smooth over time. The server further approximates the correction with mathematical functions to reduce the number of bits necessary for transmission to a mobile station. The mobile station, upon receiving the coefficients, evaluates the mathematical functions using the coefficients and a time of applicability (e.g., the current time), converts the evaluated result to a standard coordinate system, and applies the conversion result to the coarse orbit data to obtain the precise orbit data. 1. A method of a mobile station , comprising:receiving real-time orbit data from a plurality of satellites for a determination of spatial and time information of the mobile station; andusing the real-time orbit data of the plurality of satellites to correct an error of a clock bias in predicted orbit data of one or more additional satellites, wherein the number of satellites in the plurality of satellites is equal to or greater than the number of unknowns in the spatial and time information of the mobile station.2. The method of claim 1 , further comprising:using the real-time orbit data of a first satellite in the plurality of satellites to correct the error of the clock bias in the predicted orbit data of the first satellite.3. The method of claim 1 , further comprising:correcting the error of the clock bias in predicted orbit data using an estimation method.4. The method of claim 1 , wherein the estimation method includes a linear claim 1 , linearized claim 1 , or non-linear estimation method.5. The method of claim 1 , wherein the estimation method includes a Kalman filter or weighted least squares.6. A mobile station claim 1 , comprising:a receiver configured to receive real-time ...

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Номер записи: 52

15-08-2013 дата публикации

Strong WWAN-WLAN Intermodulation (IM) Mitigation and Avoidance Techniques

Номер: US20130207839A1

Автор: Farmer Dominic Gerard, PALS Timothy Paul, SIMIC Emilija Milorad

Принадлежит: QUALCOMM INCORPORATED

Apparatuses, methods, and computer-readable media for mitigating intermodulation (IM) distortion in wireless communications devices and systems are presented. Aspects of the present invention include several different techniques that can be used separately or in tandem. For example, a receiver mitigates IM distortion by altogether avoiding reception of satellites in a GNSS band(s) that are affected by it (e.g. “victim’ or “affected” band). A receiver may instead switch reception of satellites in a GNSS band that are affected by the IM distortion (e.g. the “victim” band) and not in a dedicated tracking mode, to another GNSS band that is not affected (e.g. “non-victim” band), while still maintaining tracking of satellites in the original victim GNSS band that are in a dedicated tracking mode. A receiver may also shift a local oscillator (LO) frequency. A receiver may also perform enhanced cross-correlation techniques, such a widening or expanding an existing Xcorr algorithm mask. 1. A method of a receiver for mitigating intermodulation (IM) distortion in a wireless communications system , comprising:identifying at least one distortion signal that interferes with a first satellite positioning system (SPS);maintaining reception of a first positioning channel within the first SPS; andswitching reception of a second positioning channel within the first SPS to reception of a third positioning channel within a second SPS.2. The method of claim 1 , wherein the first SPS is a victim SPS that is the subject of substantial interference.3. The method of claim 1 , wherein the second SPS is a non-victim SPS that is not subject to substantial interference.4. The method of claim 1 , wherein the first positioning channel with the first SPS is a satellite within the first SPS that is in a dedicated tracking mode.5. The method of claim 4 , wherein the first positioning channel that is in the dedicated tracking mode comprises an identification of a position of the satellite within the ...

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Номер записи: 53

15-08-2013 дата публикации

SYSTEM AND METHOD FOR ESTIMATING INDOOR LOCATION USING SATELLITE SIGNAL GENERATION DEVICE

Номер: US20130207840A1

Автор: Mook Jung Kan, Sup Lee Woo, Tai Shin Hee

Принадлежит:

A system for estimating an indoor location of using a satellite signal generation device, including a reception antenna for receiving satellite signals; a central control device for calculating and renewing real-time satellite information of all existing satellites, for extracting and synchronizing satellite time from the satellite signal received from the reception antenna, and selecting at least four satellite numbers that can be used for estimating the location from the all existing satellites, based on the satellite time information; and at least one satellite signal generation device for being allocated the satellite number from the central control device and generating the satellite signal corresponding to the allocated satellite number, wherein an environment is provided for a user of an indoors satellite signal receiving terminal to estimate the location of oneself, based on the satellite signal that corresponds to the at least four satellite numbers, transmitted from the satellite signal generation device. 18-. (canceled)9. A system for estimating an indoor location using a satellite signal generation device , the system comprising:a receiving antenna for receiving satellite signals;a central controller for periodically receiving and storing an update of real-time satellite information of all actual satellites, extracting satellite time from the satellite signals received from the receiving antenna, and selecting at least 4 satellite numbers available for location estimation among all the actual satellites based on information on the satellite time; andat least one satellite signal generation device receiving satellite numbers allocated by the central controller, and generating satellite signals corresponding to the satellite numbers allocated by the central controller,wherein the system provides an environment that enables an indoor satellite signal receiving terminal user to estimate his or her location based on the satellite signals corresponding to the ...

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Номер записи: 54

29-08-2013 дата публикации

ENHANCING SEARCH CAPACITY OF GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) RECEIVERS

Номер: US20130222181A1

Автор: Ganesan Aravind, Singh Jasbir, Tangudu Jawaharlal

Принадлежит: TEXAS INSTRUMENTS INCORPORATED

Enhancing search capacity of Global Navigation Satellite System (GNSS) receivers. A method for searching satellite signals in a receiver includes performing a plurality of searches sequentially. The method also includes storing a result from each search of the plurality of searches in a consecutive section of a memory. Further, the method includes detecting free sections in the memory. The method also includes concatenating the free sections in the memory to yield a concatenated free section. Moreover, the method includes allocating the concatenated free section for performing an additional search. 1. A method for searching satellite signals in a receiver , the method comprising:A. performing a plurality of searches sequentially;B. storing a result from each search of the plurality of searches in a consecutive section of a memory;C. detecting free sections in the memory;D. concatenating the free sections in the memory to yield a concatenated free section, the concatenating including shifting coherent and non-coherent correlation results corresponding to the plurality of searches from one or more non-consecutive sections in the memory to one or more consecutive sections in the memory if the free sections, in conjunction, are sufficient for enabling the additional search; andE. allocating the concatenated free section for performing an additional search.2. The method as claimed in in which shifting the coherent and the non-coherent correlation results includes shifting within a coherent and non-coherent allocated section when retaining associated base addresses occurs along with coherent and non-coherent integration thereby unaffecting power consumption.3. The method as claimed in in which concatenating the free sections in the memory includes concatenating the coherent and the non-coherent correlation results across searches if the free sections are sufficient to start the additional search This application is a Divisional of prior application Ser. No. 12/980,360, ...

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Номер записи: 55

29-08-2013 дата публикации

Verifying generic broadcast of location assistance data

Номер: US20130223626A1

Автор: Philip Michael Hawkes, Stephen William Edge, Sven Fischer

Принадлежит: Qualcomm Inc

Various techniques are provided for Location Services (LCS) Assistance Data broadcast, for example for implementation in LTE and LTE-A systems. The embodiments described herein may use the LPP/LPPe positioning protocol, by making use of existing unsolicited Provide Assistance Data (PAD) messages. Embodiments avoid the need to define and implement a separate broadcast Assistance Data protocol. Additional exemplary embodiments for scheduling and verifying of the broadcast Assistance Data messages are described herein.

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Номер записи: 56

29-08-2013 дата публикации

Scheduling generic broadcast of location assistance data

Номер: US20130225185A1

Автор: Stephen William Edge, Sven Fischer

Принадлежит: Qualcomm Inc

Various techniques are provided for Location Services (LCS) Assistance Data broadcast, for example for implementation in LTE and LTE-A systems. The embodiments described herein may use the LPP/LPPe positioning protocol, by making use of existing unsolicited Provide Assistance Data (PAD) messages. Embodiments avoid the need to define and implement a separate broadcast Assistance Data protocol. Additional exemplary embodiments for scheduling and verifying of the broadcast Assistance Data messages are described herein.

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Номер записи: 57

05-09-2013 дата публикации

RECEIVING METHOD AND RECEIVING APPARATUS

Номер: US20130229304A1

Автор: MURAKI Kiyotaka, Sasahara Hideo

Принадлежит: SEIKO EPSON CORPORATION

In a baseband process circuit unit, a demodulation unit demodulates a received satellite signal which carries a navigation message to obtain a demodulated data. Further, an error bit detection unit detects an error bit from among the demodulated data using a parity code included in the demodulated data. An inconsistent bit detection unit detects an inconsistent bit by comparing the demodulated data with prescribed comparison data. An adoption determination unit determines whether or not to adopt the demodulated data, based on a difference between the error bit and the inconsistent bit. In addition, a correction unit corrects the demodulated data, in a case where the demodulated data is determined to be adopted by the adoption determination unit. 1. A receiving method comprising:receiving a satellite signal which carries a navigation message;demodulating the received satellite signal to obtain a demodulated data;detecting an error bit from among the demodulated data using an error detection code included in the demodulated data;detecting an inconsistent bit, comparing the demodulated data with prescribed comparison data;determining whether or not to adopt the demodulated data, based on a difference between the error bit and the inconsistent bit; andcorrecting the demodulated data, in a case where the demodulated data is determined to be adopted by the determination.2. The receiving method according to claim 1 ,wherein the demodulated data comprises word data for each predetermined transport data unit, following a data format of the navigation message,wherein the detecting of the error bit includes detecting the error bit for each word data,the detecting of the inconsistent bit includes comparing the demodulated data with the comparison data with respect to word data in which an orbit calculation parameter is stored, andthe determining whether or, not to adopt the demodulated data includes determining whether or not to adopt the word data in which the orbit ...

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Номер записи: 58

12-09-2013 дата публикации

Adaptive Method for Estimating the Electron Content of the Ionosphere

Номер: US20130234886A1

Автор: Gonzague BERTIN DE LA HAUTIERE, Mathias Van Den Bossche, Sebastien Trilles

Принадлежит: Thales SA

An adaptive method for estimating the electron content of the ionosphere comprises: collecting a set of measurements carried out by a plurality of beacons receiving radio frequency signals transmitted by a plurality of transmitting satellites; computing coordinates of the points of intersection between the transmission axis of the signals and a surface surrounding the Earth, and of a vertical total electron content determined at each of these points; computing a vertical total electron content for each of the nodes of an initial mesh of the surface; a statistical dispersion analysis of the vertical total electron content; a computation step making it possible to define a suitable statistical estimator, or a computation step making it possible to generate a suitable mesh of the surface; a statistical error analysis making it possible to select between a validation of the adaptation of the method and a stopping of the method.

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Номер записи: 59

12-09-2013 дата публикации

Method and Apparatus for Locating Mobile Receivers Using a Wide Area Reference Network for Propagating Ephemeris

Номер: US20130234888A1

Автор: van DIGGELEN Frank

Принадлежит: Global Locate, Inc.

A method and apparatus for distribution and delivery of global positioning system (GPS) satellite telemetry data using a communication link between a central site and a mobile GPS receiver. The central site is coupled to a network of reference satellite receivers that send telemetry data from all satellites to the central site. The mobile GPS receiver uses the delivered telemetry data to aid its acquisition of the GPS satellite signal. The availability of the satellite telemetry data enhances the mobile receiver's signal reception sensitivity. 1. A method of improving acquisition sensitivity of a Global Positioning System (GPS) receiver , comprising:receiving ephemeris from a reference station network;generating, using the ephemeris, a first reduced search space for a first satellite signal of a first satellite, wherein the first reduced search space includes a reduced pseudo-range search window and a reduced pseudo-range late search window for the first satellite signal; andsearching for the first satellite signal, within the reduced search space, using a first increased integration time per search bin of the reduced search space.2. The method of claim 1 , further comprising:deriving a pseudo-range model from the ephemeris; andgenerating, using the pseudo-range model and an approximate position of the GPS receiver, pseudo-range and pseudo-range rate estimates for the first satellite signal.3. The method of claim 2 , further comprising:generating the first reduced search space for the first satellite signal using the pseudo-range and pseudo-range rate estimates.4. The method of claim 1 , further comprising:increasing an integration time per search bin to generate the first increased integration time per search bin, wherein the first increased integration time per search bin is a function of the first reduced search space for the first satellite signal.5. The method of claim 1 , wherein generating claim 1 , using the ephemeris claim 1 , the first reduced search space ...

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Номер записи: 60

26-09-2013 дата публикации

METHOD FOR DETECTING AND EXCLUDING MULTIPLE FAILURES IN A SATELLITE

Номер: US20130249734A1

Автор: Faurie Frederic, Giremus Audrey, Najim Mohamed

Принадлежит:

The present invention relates to a method for detecting and excluding at least one pseudo-range measured between a satellite and a receiver for receiving signals transmitted by different satellites of a radio-positioning constellation when said pseudo-range is faulty, characterized in that said method includes the steps of: (a) determining an estimation of the position of the receiver from the pseudo-ranges measured by the receiver, (b) estimating, from the thus-estimated position, biases in the measured pseudo-ranges; (c) processing the thus-obtained biases in order to derive a value representative of the probability of a fault for each pseudo-range; (d) preselecting, on the basis of the resulting values, a given number of pseudo-ranges which are most likely to be faulty; (e) determining, for each combination of pseudo-ranges from among the thus-preselected pseudo-ranges, a value of a test variable representative of the likelihood the combination is faulty; (f) selecting, on the basis of the values of the thus-obtained test variables, at least one combination of pseudo-ranges which are most likely to be faulty; and (g) comparing the test variable associated with the selected combination with a predetermined threshold, and transmitting the signals to the receiver or outward on the basis of the result of said comparison. The invention also relates to an integrity-monitoring system and to a vehicle therefor. 1. A method for detection and exclusion of at least one pseudorange measured between a satellite and a receiver receiving signals emitted by different satellites of a radio-positioning constellation , when this pseudorange is faulty , characterised in that it comprises steps of:(a) Determining estimation of the position of the receiver from the pseudoranges measured by the receiver;(b) Estimating, from the accordingly estimated position, biases in the pseudoranges measured;(c) Processing accordingly obtained biases to deduce therefrom a value representative of the ...

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Номер записи: 61

26-09-2013 дата публикации

DEVICE FOR RECEIVING RADIO-NAVIGATION SIGNALS WITH MULTIPLE ANTENNAS AND COMMON SYNCHRONIZATION SLAVING

Номер: US20130249735A1

Автор: Chopard Vincent, DEPRAZ David, MARTIN Nicolas

Принадлежит: THALES

The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier, in demodulating the signals received by each antenna separately and then in combining the various demodulated signals, thereby amounting to effecting a beam forming in an equivalent antenna pattern. The invention then requires only a single synchronization slaving for the set of demodulation pathways. 1. Device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array , for each antenna and for each satellite in view of the said device , means for demodulating the signals received comprising means for phase-wise multiplication with a local carrier , means for time-wise correlation with a local code , means for integration of the correlated signal in phase and in time , a carrier NCO numerical control operator able to deliver a local carrier phase for driving the generation of the local carrier and a code NCO numerical control operator able to deliver a time command for driving the generation of the local code and a measurement of the instant of emission by the satellite of the signal received ,wherein the said device furthermore comprises, for each satellite, means for tracking synchronization of the carrier and of the code comprising:{'sub': 1', '2', '1', '2', 'a', 'BL, 'beam forming means able to deliver, on the basis of the output signals Z, Zof the integration means, a unique formed signal Z equal to the sum of the said signals Z, Zweighted by complex weighting coefficients equal to the product of the gain Gof the associated antenna with a corrective gain Gof the lever arm between the phase centre of the antenna and the centre of symmetry O of the antenna array;'}a code discriminator and a phase discriminator which are applied to the said formed ...

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Номер записи: 62

03-10-2013 дата публикации

NAVIGATION BIT BOUNDARY DETERMINATION APPARATUS AND A METHOD THEREFOR

Номер: US20130257651A1

Автор: Gao Ke, Liu Mao, Zhang Weihua, Zou Jinghua

Принадлежит: O2MICRO INC.

A navigation bit boundary determination apparatus and a method therefor. In one example, the navigation bit boundary determination apparatus includes a satellite signal receiving module, a position receiving and clock calibration module, a detection module, a first calculation module, a second calculation module, and a determination module. The satellite signal receiving module is configured to receive a satellite signal from a satellite and record a local receiving time of the satellite signal. The position receiving and clock calibration module is configured to receive a time signal and a position of the navigation bit boundary determination apparatus. The detection module is configured to detect if ephemeris information of the satellite is available. The first calculation module is configured to calculate a coordinate of the satellite. The second calculation module is configured to calculate a transmitting time for the satellite signal. The determination module is configured to determine a navigation bit boundary of the satellite signal. 1. An apparatus for determining a navigation bit boundary of a satellite signal , comprising:a satellite signal receiving module configured to receive the satellite signal from a satellite, determine and record a local receiving time of the satellite signal;a position receiving and clock calibration module configured to receive a time signal and a position of the apparatus, and calibrate the local receiving time of the satellite signal according to the received time signal to obtain a calibrated local receiving time;a detection module configured to detect if ephemeris information of the satellite is available;a first calculation module configured to calculate a coordinate of the satellite based on the ephemeris information if the ephemeris information is available;a second calculation module configured to calculate a transmitting time for the satellite signal based on the position of the apparatus, the coordinate of the satellite ...

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Номер записи: 63

03-10-2013 дата публикации

APPARATUS AND METHOD

Номер: US20130257652A1

Автор: Mattos Philip

Принадлежит: EUROPEAN UNION EUROPEAN COMMISSION

Apparatus comprises: a first correlator configured to correlate a first signal component with a first code to provide a first output, said first signal component having a carrier frequency and data; a second correlator configured to correlate a second signal component with a second code to provide a second output, said second signal component having the same carrier frequency as the first signal component and the same data as the first signal component, said data on the second signal component being delayed with respect to the data on the first signal component; and a processor configured to process the first and second outputs, said data on said first output being aligned with the second output to provide frequency information about said carrier. 1. An apparatus comprising:a first correlator configured to correlate a first channel with a first code to provide a first output, said first channel having a carrier frequency and data;a second correlator configured to correlate a second channel with a second code to provide a second output, said second channel having the same carrier frequency as the first channel and the same data as the first channel, said data on the second channel being delayed with respect to the data on the first channel; anda processor configured to process the first and second outputs, said data on said first output being aligned with the second output to provide frequency information about said carrier.2. The apparatus as claimed in claimed in claim 1 , comprising a delay claim 1 , said delay configured to delay said first output and provide a delayed first output to said processor.3. The apparatus as claimed in claim 2 , wherein said delay is configured to delay said first output such that said data in said first output is aligned with the data in said second channel.4. The apparatus as claimed in claim 1 , wherein said data in said second channel is delayed with respect to said data in the first channel by n symbols.5. (canceled)6. The ...

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Номер записи: 64

03-10-2013 дата публикации

System and Method for Fast Code Phase and Carrier Frequency Acquisition in GPS Receiver

Номер: US20130257653A1

Автор: Sullivan Mark C.

Принадлежит:

A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths. 1. A method for detecting code phase in a GPS signal , comprising:multiplying each of a plurality of frequency domain representations of one millisecond segments of a GPS signal by a frequency domain representation of a Gold code corresponding to a GPS satellite to generate a plurality of products;converting each of the plurality of products to the time domain to produce converted signals; andcombining the plurality of converted signals to determine a correlation peak that is reflective of a code phase of the GPS signal, wherein at least one of the converted signals has been multiplied by a complex exponential to compensate for a frequency difference between an input signal and an estimated carrier frequency.2. The method of claim 1 , wherein the combining comprises determining a magnitude of each convolution signal and summing the determined magnitudes.3. The method of claim 1 , further comprising comparing points in the combination to a peak threshold.4. The method of claim 1 , further comprising pre-computing the frequency domain ...

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Номер записи: 65

10-10-2013 дата публикации

Navigation Bit Boundary Determination Apparatus and a Method Therefor

Номер: US20130265194A1

Автор: Jinghua Zou, Ke Gao, Mao Liu, Weihua Zhang

Принадлежит: O2Micro Inc

A navigation bit boundary determination apparatus and a method therefor. The navigation bit boundary determination apparatus includes a Beidou satellite signal receiving module, a position receiving and clock calibration module, a calculation module, and a determination module. The Beidou satellite signal receiving module receives a Beidou Geostationary Earth Orbit (GEO) satellite signal, determines and records a local receiving time of the Beidou GEO satellite signal. The position receiving and clock calibration module receives a GPS time signal and a position of the navigation bit boundary determination apparatus. The calculation module calculates a transmitting time for the Beidou GEO satellite signal. The determination module determines a navigation bit boundary of the Beidou GEO satellite signal.

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Номер записи: 66

17-10-2013 дата публикации

Detection of Falsified Signals in a Satellite Navigation System

Номер: US20130271316A1

Автор: TRAUTENBERG Hans, Vilzmann Johann

Принадлежит: Astrium GmbH

A device for detection of falsified signals in a satellite navigation system includes at least two antennas having one or more receivers for receiving navigation signals, a phase difference measuring unit for determining phase differences of the received navigation signals for each antenna, and a detection unit for detecting falsified navigation signals among the received navigation signals on the basis of the phase differences determined. 1. A device for detection of falsified signals in a satellite navigation system , comprisingat least two antennas having one or more receivers for receiving navigation signals;a phase difference measuring unit configured to determine phase differences of the received navigation signals for each antenna; anda detection unit configured to detect falsified navigation signals among the received navigation signals using the determined phase differences.2. The device according to claim 1 , wherein the phase difference measuring unit is configured to determine the phase differences between the navigation signals received from each antenna based on carrier phase measurements.3. The device according to claim 2 , further comprising:a reference wave unit configured to generate a reference wave with a same frequency as a carrier wave of the received navigation signals,wherein the phase difference measuring unit is configured to determine the phase differences between the navigation signals received by each antenna on the basis of measurements of the phase differences between the carrier phases of individual navigation signals and the phase of the reference wave.4. The device according to claim 1 , wherein the detection unit is configured to recognize navigation signals as being falsified navigation signals when the phase differences in the navigation signals on each antenna are almost identical.5. The device according to claim 1 , wherein the at least two antennas are omnidirectional antennas.6. A system that uses signals of a satellite ...

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Номер записи: 67

17-10-2013 дата публикации

ADVANCED GLOBAL NAVIGATION SATELLITE SYSTEMS (GNSS) POSITIONING USING PRECISE SATELLITE INFORMATION

Номер: US20130271318A1

Автор: Doucet Kenneth Donald, Landau Herbert

Принадлежит: TRIMBLE NAVIGATION LIMITED

A method is provided for estimating parameters useful to determine the position of a global navigation satellite system (GNSS) receiver or a change in the position thereof. The method includes the steps of: obtaining at least one GNSS signal received at the GNSS receiver from each of a plurality of GNSS satellites; obtaining, from at least one network node, precise satellite information on: (i) the orbit or position of at least one of the plurality of GNSS satellites, and (ii) a clock offset of at least one of the plurality of GNSS satellites; identifying, among the obtained GNSS signals, a subset of at least one GNSS signal possibly affected by a cycle slip, the identified subset being hereinafter referred to as cycle-slip affected subset; and estimating parameters useful to determine the position of the GNSS receiver or a change in the position of the GNSS receiver using at least some of the obtained GNSS signals which are not in the cycle-slip affected subset, and the precise satellite information. 1. Method for estimating parameters useful to determine the position of a global navigation satellite system (GNSS) receiver or a change in the position of the GNSS receiver , the method including the steps of:obtaining at least one GNSS signal received at the GNSS receiver from each of a plurality of GNSS satellites; (i) the orbit or position of at least one of the plurality of GNSS satellites, and', '(ii) a clock offset of at least one of the plurality of GNSS satellites;, 'obtaining, from at least one network node, information, here referred to as “precise satellite information”, onidentifying, among the obtained GNSS signals, a subset of at least one GNSS signal possibly affected by a cycle slip, the identified subset being hereinafter referred to as cycle-slip affected subset; and at least some of the obtained GNSS signals which are not in the cycle-slip affected subset, and', 'the precise satellite information., 'estimating parameters useful to determine the ...

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Номер записи: 68

24-10-2013 дата публикации

Method and Apparatus for Performing Frequency Synchronization

Номер: US20130279541A1

Автор: ABRAHAM Charles, Goldberg Jason, Tapucu Emre

Принадлежит:

A method and apparatus for performing frequency analysis of sub-epoch correlations to estimate an unknown frequency of a received signal is provided. The method includes forming a sequence of correlation values from a plurality of correlations performed over a period less than a repeating period of a code, and analyzing the sequence of correlation values to estimate the frequency that is used to receive a signal comprising the code. 1. A method for frequency estimation of a correlation signal comprising a sequence of correlation values from a plurality of correlations performed over a period less than a repeating period of a code , comprising:generating, using the processing device and based on the correlation signal, a first estimate of a frequency error;generating, using the processing device and based on the correlation signal, a second estimate of the frequency error based on the first estimate of the frequency error; anddetermining, using the processing device and based on the second estimate of the frequency error, a frequency for receiving a signal comprising the code, wherein the determined frequency corresponds to a maximum signal magnitude of the correlation signal or a maximum signal power of the correlation signal.2. The method of claim 1 , further comprising:generating subsequent estimates of the frequency error until a residual frequency error associated with the correlation signal is smaller than a predetermined amount.3. The method of claim 1 , wherein the determined frequency for receiving the signal comprising the code is determined without providing feedback to a numerically controlled oscillator (NCO) and without performing an additional correlation after the correlation values have been determined.4. The method of claim 1 , wherein the first estimate of the frequency error and the second estimate of the frequency error are generated using a frequency discriminator.5. The method of claim 4 , wherein generating the second estimate of the frequency ...

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Номер записи: 69

24-10-2013 дата публикации

GNSS Performance Enhancement Using Accelerometer-Only Data

Номер: US20130282276A1

Автор: Chansarkar Mangesh

Принадлежит:

The present invention provides apparatus and methods for improving satellite navigation by assessing the dynamic state of a platform for a satellite navigation receiver and using this data to improve navigation models and satellite tracking algorithms. The dynamic state of the receiver platform may be assessed using only accelerometer data, and does not require inertial navigation system integration. The accelerometers may not need to be very accurate and may not need to be aligned and/or accurately calibrated. 1. A method of accelerometer assisted satellite navigation , comprising:collecting accelerometer data;categorizing said accelerometer data into one of at least two acceleration levels; andutilizing the categorized accelerometer data to enhance satellite navigation.2. A method as in claim 1 , further comprising:detecting a stationary condition of an accelerometer set;gross-calibrating said accelerometer set when in said stationary condition, wherein gross-calibrating includes determining a combined-bias of said accelerometer set; anddefining at least two acceleration levels using said combined-bias.3. A method as in claim 2 , wherein said detecting said stationary condition comprises:collecting acceleration data;calculating the statistics of said acceleration data; andanalyzing said statistics to determine said stationary condition.4. A method as in claim 2 , wherein said accelerometer is within a vehicle and detecting said stationary condition includes monitoring a vibration profile for said vehicle.5. A method as in claim 2 , wherein said gross-calibrating said accelerometer set is repeated whenever a stationary condition is detected.6. A method as in claim 2 , wherein said accelerometer set is an accelerometer triad and said combined-bias is determined for said accelerometer triad as a whole.7. A method as in claim 2 , wherein said utilizing said categorized accelerometer data to enhance satellite navigation includes assisting satellite tracking.8. A method ...

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Номер записи: 70

31-10-2013 дата публикации

METHODS, DEVICES, AND USES FOR CALCULATING A POSITION USING A GLOBAL NAVIGATION SATELLITE SYSTEM

Номер: US20130285849A1

Автор: BEN-MOSHE Boaz, LEVI Harel

Принадлежит: ARIEL-UNIVERSITY RESEARCH AND DEVELOPMENT COMPANY, LTD.

The invention, in some embodiments, relates to the field of global navigation satellite systems, and more particularly to the field of methods and devices for improving accuracy of position determination by receivers of global navigation satellite systems. Some embodiments of the invention relate to methods for generating a three-dimensional (3-D) representation of an urban area by a receiver of a global navigation satellite system using blocked lines of sight to satellites of the system. Additional embodiments of the invention relate to methods for transmitting a three-dimensional (3-D) representation of an urban area by a receiver of a global navigation satellite system for improving calculation of location by the global navigation satellite system receiver. 1. A method for calculating the position of a GNSS (Global Navigation Satellite System) receiver , comprising:receiving a plurality of signals from a first plurality of GNSS satellites;calculating a region in which a GNSS receiver is located based on at least some of said received signals; said satellite is a line-of-sight (LOS) satellite, having a line of sight to said GNSS receiver; or', 'said satellite is a non-line-of-sight (NLOS) satellite, not having a line of sight to said GNSS receiver;, 'for each satellite in a second plurality of GNSS satellites, classifying whetherobtaining at least one three-dimensional representation of an area including said region;for each satellite in said second plurality of GNSS satellites, using said at least one three-dimensional representation to define a three-dimensional shading representation including at least one illuminated subregion and at least one shaded subregion, such that a GNSS receiver located in said at least one illuminated subregion has a line of sight said satellite and a GNSS receiver located in said at least one shaded subregion does not have a line of sight to said satellite;for each said three-dimensional shading representation defining a shading ...

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Номер записи: 71

31-10-2013 дата публикации

Method and Apparatus for Maintaining Integrity of Long-Term Orbits in a Remote Receiver

Номер: US20130285851A1

Автор: Frank van Diggelen, Matthew Riben

Принадлежит: Broadcom Corp, Global Locate Inc, Globate Locate Inc

A method and apparatus for maintaining integrity of long-term-orbit information used by a Global-Navigation-Satellite-System or other positioning receiver is described. The method comprises obtaining a predicted pseudorange from a first set of long-term-orbit information possessed by a positioning receiver; obtaining, at the positioning receiver from at least one satellite, a measured pseudorange; determining validity of the predicted pseudorange as a function of the predicted pseudorange and the measured pseudorange; and excluding from the long-term-orbit information at least a portion thereof when the validity of the predicted pseudorange is deemed invalid. Optionally, the method may comprise updating or otherwise supplementing the long-term-orbit information with other orbit information if the validity of the predicted pseudorange is deemed invalid.

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Номер записи: 72

07-11-2013 дата публикации

Signal receiver, portable computer and signal acquisition method used in satellite communication system

Номер: US20130295871A1

Автор: Hung-Yi Yang

Принадлежит: SkyTraq Tech Inc

A signal receiver used in a satellite communication system is provided. The signal receiver comprises a first type code generator, a second type code generator, a composite code generator, a correlation module and a determining module. The first type code generator generates a first type code corresponding to a first type signal. The second type code generator generates a second type code corresponding to a second type signal and having a code length N-time longer than that of the first type code. The composite code generator generates a composite code by superimposing N successive first type codes on the second type code. The correlation module correlates the composite code with a cell of a received signal to generate correlation results. The determining module determines a type of the received signal according to correlation results of the composite code with the received signal.

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Номер записи: 73

21-11-2013 дата публикации

Virtual Floating Correlators for GPS Sensor

Номер: US20130308687A1

Автор: Joseph Angelo, McCoy David

Принадлежит: AVIDYNE CORPORATION

In one embodiment, a correlator of a global positioning system receiver in a global positioning system receives a sample satellite signal. The correlator includes a signal comparator configured to receive the sample signal, a first normalized estimate signal, and a second normalized estimate signal. The signal comparator generates a first accumulated output and a second accumulated output. The first accumulated output represents the integration of a correlation of the sample signal and the first normalized estimate signal. The second accumulated output represents the integration of a correlation of the sample signal and the second normalized estimate signal. Using time-multiplexing, the high speed of a digital signal processing core is leveraged to perform calculations of the signal comparator and threshold comparator in real time. 1. A correlator of a global positioning system receiver in a global positioning system that receives a sample satellite signal comprising:a signal comparator configured to receive the sample signal, a first normalized estimate signal, and a second normalized estimate signal, the signal comparator generating a first accumulated output and a second accumulated output, the first accumulated output representing the integration of a correlation of the sample signal and the first normalized estimate signal, and the second accumulated output representing the integration of a correlation of the sample signal and the second normalized estimate signal; anda threshold comparator configured to receive the first accumulated output and the second accumulated output, the threshold comparator (a) calculating a first magnitude value based on the square of the first accumulated output and calculating a second magnitude value based on the square of the second accumulated output and (b) comparing the first and second magnitude values with a threshold value, wherein if the sum of the first and second magnitude values is greater than the threshold value, then ...

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Номер записи: 74

12-12-2013 дата публикации

ANTI-SPOOFING DETECTION SYSTEM

Номер: US20130328719A1

Автор: Gum Arnold Jason, Rowitch Douglas Neal

Принадлежит: QUALCOMM INCORPORATED

Spoofing of a satellite positioning system is detected by receiving position location data from multiple sources. The received data is compared and inconsistent data is marked. A position location is estimated based on the received position location data, while accounting for the marked inconsistent data. 1. A method for marking inconsistent position location data of a mobile device , comprising:receiving position location data from a plurality of data sources;comparing the received position location data; andmarking inconsistent position location data based on the comparison.2. The method of claim 1 , wherein marking inconsistent position location data is performed by at least one of a mobile device or a server.3. The method of claim 1 , wherein the plurality of data sources comprise at least one of a satellite system claim 1 , a base station claim 1 , or a wireless access point.4. The method of claim 1 , wherein one of the marked inconsistent position location data from a data source is associated with a spoofing signal.5. The method of claim 4 , wherein the marked inconsistent position location data is discarded.6. The method of claim 4 , wherein the marked inconsistent position location data is flagged.7. The method of claim 4 , wherein the marked inconsistent position location data is de-weighted.8. The method of claim 4 , further comprising sending notification of the marked inconsistent position location data.9. The method of claim 1 , further comprising estimating the position of the mobile device based on the received position location data claim 1 , while accounting for the marked inconsistent data.10. The method of claim 9 , wherein accounting for the marked inconsistent data includes discarding or de-weighting the marked inconsistent data.11. The method of claim 9 , in which marking comprises marking inconsistent data based upon a reliability of each data source.12. The method of claim 9 , in which marking comprises marking inconsistent data that is ...

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Номер записи: 75

19-12-2013 дата публикации

DETECTING METHOD OF GPS CLOCK SIGNAL JUMP USING CARRIER PHASE MEASUREMENTS IN REAL-TIME

Номер: US20130335267A1

Автор: CHO Jeongho, HEO Moon-Beom, HEO Youn Jeong

Принадлежит: KOREA AEROSPACE RESEARCH INSTITUTE

Provided is a method of detecting GPS clock signal jump, comprising a data obtaining step of obtaining GPS carrier phase measurements from a GPS receiver and satellite orbits from IGS to detect the GPS clock signal jump; a GPS clock bias calculating step of eliminating errors included in the data obtained from the data obtaining step and calculating GPS clock bias; a Teager energy calculating step of applying a Teager energy operator to the GPS clock bias calculated with respect to each satellite in the GPS clock bias calculating step and calculating Teager energy to determine whether the GPS clock jump is occurred; and a GPS clock jump detecting step of checking whether a Teager energy is larger than a threshold value. Therefore, the present invention can effectively detect the GPS clock signal jump in real-time. 1. A method of detecting GPS clock signal jump , comprising:{'b': '100', 'a data obtaining step S of obtaining GPS carrier phase measurements from a GPS receiver and precise satellite orbits from IGS to detect the GPS clock signal jump;'}{'b': 200', '100, 'sup': 'i', 'a GPS clock bias calculating step S of eliminating errors included in the data obtained from the data obtaining step S and calculating GPS clock bias B;'}{'b': 300', '200, 'sup': 'i', 'a Teager energy calculating step S of applying a Teager energy operator to the GPS clock bias Bcalculated with respect to each satellite in the GPS clock bias calculating step S and calculating Teager energy in order to determine whether the GPS clock jump is occurred; and'}{'b': 400', '300, 'a GPS clock jump detecting step S of checking whether a Teager energy obtained in the Teager energy calculating step S is larger than a threshold value, and it is determined that the GPS clock jump is occurred if the Teager energy is larger than the threshold value.'}4200. The method claims 1 , wherein the data used in the GPS clock bias calculating step S are data received from a receiver synchronized with an atomic clock ...

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Номер записи: 76

26-12-2013 дата публикации

RECEIVING DEVICE AND CORRELATION INTEGRATING METHOD

Номер: US20130343436A1

Автор: TERASHIMA Maho

Принадлежит:

In a baseband processing circuit unit, a sample memory stores a received data sequence obtained by sampling a signal received by an RF receiving circuit unit at a given sampling time interval. A data sequence estimating unit estimates an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from the sampling time of the received data sequence, on the basis of the received data sequence stored in the sample memory. A correlation operation unit performs a correlation operation on the estimated data sequence estimated by the data sequence estimating unit and a replica code. An integration unit integrates the correlation operation result from the correlation operation unit at a given integration time interval. 1. A receiving device comprising:a receiving unit that receives a satellite signal from a positioning satellite;a storage unit that stores a received data sequence obtained by sampling the signal received by the receiving unit at a given sampling time interval;an estimation unit that estimates an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from the sampling time of the received data sequence, based on the received data sequence;a correlation operation unit that performs a correlation operation on the estimated data sequence and a replica code; andan integration unit that integrates the correlation operation result in the correlation operation unit at a given integration time interval.2. The receiving device according to claim 1 , wherein the estimation unit estimates the estimated data sequence by performing a predetermined interpolating operation based on sampled values constituting the received data sequence.3. The receiving device according to claim 1 , wherein the estimation unit estimates the estimated data sequence using a time corresponding to a shift amount claim 1 , by which a peak phase is shifted ...

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Номер записи: 77

02-01-2014 дата публикации

Apparatus and method for handling jamming signal

Номер: US20140002303A1

Автор: Cheon Sig Sin, Sang Uk LEE, Seong Kyun JEONG, Young Bak KIM

Принадлежит: Electronics and Telecommunications Research Institute ETRI

The apparatus includes a first frequency conversion unit that converts a radio frequency (RF) signal of a first satellite into an intermediate frequency (IF) signal, a signal processing unit that acquires signal processing information by performing signal tracking with respect to the converted IF signal, a jamming determination unit that determines whether a jamming signal is generated based on the acquired signal processing information, and a signal complex processing unit that performs signal processing with respect to an RF signal of a second satellite based on the signal processing information to thereby generate a navigation message of the first satellite when the jamming signal is generated. Accordingly, a Global Positioning System (GPS) receiver that is installed in a fixed point may acquire stable visual information even in an environment in which a jamming signal is generated.

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Номер записи: 78

02-01-2014 дата публикации

METHOD AND APPARATUS FOR LOCATING TERMINAL DEVICE

Номер: US20140002304A1

Автор: Wei Konggang, Zhao Yu, Zhong Guanghua

Принадлежит: HUAWEI DEVICE CO., LTD.

The present invention is applicable to the field of GPS locating technologies and provides a method and an apparatus for locating a terminal device. The method includes: receiving information about starting a global positioning system; and obtaining a signal of a corresponding satellite currently in the sky according to pre-stored ephemeris data to implement locating. In embodiments of the present invention, ephemeris data is pre-stored before a terminal device starts GPS, so that after the terminal device starts GPS, corresponding satellites may be quickly determined according to the stored ephemeris data to implement quick locating, thereby effectively improving locating efficiency. 1. A method for locating a terminal device , wherein the method comprises:receiving information about starting a global positioning system; andobtaining a signal of a corresponding satellite currently in the sky according to pre-stored ephemeris data to implement locating.2. The method according to claim 1 , wherein before the step of receiving information about starting a global positioning system claim 1 , the method further comprises:obtaining ephemeris data at a preset time interval and storing the obtained ephemeris data.3. The method according to claim 2 , wherein the obtaining ephemeris data at a preset time interval comprises:when the terminal device is not in a sleep or standby state, determining whether the preset time interval expires; andif the preset time interval expires, obtaining ephemeris data.4. The method according to claim 2 , wherein the method further comprises:when the terminal device is in the sleep or standby state, stopping obtaining ephemeris data, and recording time when ephemeris data is obtained last time;when the terminal device is started from the sleep or standby state, obtaining a first time interval and determining whether the first time interval is greater than or equal to the preset time interval;if yes, obtaining ephemeris data; andif no, modifying ...

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Номер записи: 79

02-01-2014 дата публикации

CRYSTAL OSCILLATOR CALIBRATION

Номер: US20140004887A1

Автор: Agarwal Vishal, Farmer Dominic Gerard, FILIPOVIC Daniel Fred, MOWA Sasidhar, SIMIC Emilija Milorad

Принадлежит: QUALCOMM INCORPORATED

Systems and methods for temperature-calibration of an uncompensated XO in a mobile device during mobile device operation. The XO is temperature-calibrated based on assistance from wireless signals, such as from satellite source, and optionally from terrestrial sources such as WWAN, CDMA, etc. Based on one or more received wireless signals received at a receiver, corresponding frequency estimates of the XO are obtained and correlated with corresponding operating temperatures in a processor. Based on one or more samples of frequency estimates and associated temperatures, the XO is temperature-calibrated in the processor wherein a frequency-temperature (FT) model is formulated for the XO. The frequency of the temperature-calibrated XO can be determined from the FT model at any given temperature. 1. A method of temperature-calibrating an uncompensated crystal oscillator (XO) , in a mobile device during mobile device operation , the method comprising:receiving a first set of wireless signals comprising at least a first wireless signal of known frequency, at a first temperature;estimating a first frequency of the XO at the first temperature, based on at least the first wireless signal; andtemperature-calibrating the XO based on the first frequency and the first temperature.2. The method of claim 1 , wherein the uncompensated XO comprises a lack of built-in compensation for frequency variation of the XO with variation in temperature or voltage.3. The method of claim 1 , wherein the first wireless signal is transmitted by a first satellite.4. The method of claim 3 , wherein the first satellite comprises a global navigation satellite systems (GNSS) satellite.5. The method of claim 4 , further comprising receiving GNSS assistance information.6. The method of claim 5 , wherein the GNSS assistance information further comprises a location of the mobile device.7. The method of claim 5 , wherein the GNSS assistance information comprises GNSS Ephemeris information.8. The method of ...

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Номер записи: 80

02-01-2014 дата публикации

Low Authority GPS Aiding of Navigation System For Anti-Spoofing

Номер: US20140005938A1

Автор: Wang Hanching Grant

Принадлежит: The Boeing Company

A method and apparatus for generating navigation solutions. A global positioning system based navigation solution unit; an inertial navigation solution unit; a correction unit, a limiter, and an adding unit. The global positioning system based navigation solution unit is capable of generating a first navigation solution. The inertial navigation solution unit is capable of generating a second navigation solution. The correction unit is capable of generating a raw correction. The limiter is capable of selectively modifying the raw correction to fall within a selected range of corrections to form a correction. The adding unit is capable of adding the correction to the second navigation solution to form a navigation solution. 110-. (canceled)11. A method for generating a navigation solution , the method comprising:generating a set of inertial navigation solution using inertial sensor measurements;generating a blended global positioning system and inertial navigation system navigation solution using a set of global positioning system receiver measurements and a set of inertial sensor measurements;computing a raw global positioning system navigation correction as the difference between inertial navigation solution and blended global positioning system and inertial navigation system navigation solution;storing the raw global positioning system navigation correction with a time stamp;retrieving the raw global positioning system navigation correction at a specified past time stamp;computing a low authority global positioning system correction by applying a limit upon the retrieved raw global positioning system navigation correction; andadding the inertial navigation solution and the low authority global positioning system correction to form the navigation solution.12. The method of claim 11 , wherein the storing step comprises:storing the raw global positioning system navigation correction with the time stamp in earth centered inertial reference frame.13. The method of claim ...

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Номер записи: 81

09-01-2014 дата публикации

System And Transceiver Clocking To Minimize Required Number Of Reference Sources In Multi-Function Cellular Applications Including GPS

Номер: US20140011467A1

Автор: Alexander Zaslavsky, Brian T. Brunn, Gregory Uehara

Принадлежит: MARVELL WORLD TRADE LTD

A system includes a first clock module, a global positioning system (GPS) module, a phase-locked loop (PLL) module, a cellular transceiver, and a baseband module. The first clock module generates a first clock reference. The GPS module operates in response to the first clock reference. The WLAN module operates in response to the first clock reference. The PLL module generates a second clock reference by performing automatic frequency correction (AFC) on the first clock reference in response to an AFC signal. The cellular transceiver receives radio frequency signals from a wireless medium and generates baseband signals in response to the received radio frequency signals. The baseband module receives the baseband signals, operates in response to a selected one of the first clock reference and the second clock reference, and generates the AFC signal in response to the baseband signals.

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Номер записи: 82

30-01-2014 дата публикации

Global navigation satellite antenna systems and methods

Номер: US20140028497A1

Автор: Ulrich Vollath

Принадлежит: TRIMBLE NAVIGATION LTD

A method for reducing multipath when determining a location of a stationary or near stationary position, includes receiving a signal from an antenna moving continuously with respect to the stationary or near stationary position, the signal including a multipath component, processing the received signal including the multipath component, wherein multipath error in the received signal is reduced during the processing and determining a location of the stationary or near stationary position based on the processed received signal with the multipath error reduced.

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Номер записи: 83

06-02-2014 дата публикации

Multi-beam antenna array for protecting GPS receivers from jamming and spoofing signals

Номер: US20140035783A1

Автор: Pavlo Molchanov, Vincent M. Contarino

Принадлежит: Individual

Multi-beam antenna array for anti jam and anti-spoof protection of GPS satellite data using multiple directional antennas disposed in various orientations jamming or spoofing signals from any direction cannot damage all said directional antennas simultaneously. Each said directional antenna connected to filtering amplifier and to multiple GPS processors for calculating direction of signal arrival. An anti-jam/anti-spoof processor comparing directions of signals arrival with real satellites positions for arrival time from data storage filters signals from jamming or spoofing signals, which are not corresponding to the correct positions stored for each satellite at the transmit time.

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Номер записи: 84

06-02-2014 дата публикации

ENHANCING SEARCH CAPACITY OF GLOBAL NAVIGATION SATELLITE SYSTEM (GNSS) RECEIVERS

Номер: US20140035784A1

Автор: Ganesan Aravind, Singh Jasbir, Tangudu Jawaharlal

Принадлежит: TEXAS INSTRUMENTS INCORPORATED

Enhancing search capacity of Global Navigation Satellite System (GNSS) receivers. A method for searching satellite signals in a receiver includes performing a plurality of searches sequentially. The method also includes storing a result from each search of the plurality of searches in a consecutive section of a memory. Further, the method includes detecting free sections in the memory. The method also includes concatenating the free sections in the memory to yield a concatenated free section. Moreover, the method includes allocating the concatenated free section for performing an additional search. 1. A receiver comprising:A. a correlator;B. a memory; and i. a plurality of status registers,', 'ii. a plurality of shadow registers,', 'iii. a plurality of sets of configuration registers, and', 'iv. a state machine in electronic communication with the plurality of status registers, the plurality of shadow registers, and the plurality of configuration registers to enable searching for presence of data in a received signal by processing the received signal, moving bits from the plurality of shadow registers to the plurality of status registers based on the processing, and updating the plurality of configuration registers based on the processing., 'C. a memory squeezing unit in electronic communication with the correlator and the memory, the memory squeezing unit including2. The receiver as claimed in including an antenna claim 1 , a processing unit coupled to the antenna claim 1 , an analog-to-digital converter (ADC) coupled to the processing unit claim 1 , and a plurality of buffers coupled to the ADC.3. The receiver as claimed in in which the processing unit converts the received signal into an intermediate frequency (IF) signal claim 2 , and the ADC converts the IF signal into digital samples and provides the digital samples to the plurality of buffers.4. The receiver as claimed in in which the receiver is included comprised in a global navigation satellite system ...

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Номер записи: 85

13-02-2014 дата публикации

GLOBAL POSITIONING SYSTEM RADIOMETRIC EVALUATION

Номер: US20140043188A1

Автор: DESAI Shailen D., HAINES Bruce J.

Принадлежит: California Institute of Technology

Methods and devices for the analysis of global positioning system (GPS) data are described. The methods and devices comprise several metrics to analyse GPS data, such as tracking coverage, signal to noise ratio, multipath noise, positioning and receiver clock, troposphere and data noise. 1. A method for analyzing Global Positioning System (GPS) measurements , the method comprising:providing GPS receiver data from a GPS receiver;evaluating, by a computer, a measurement quality of the GPS receiver data, thereby obtaining measurement quality metrics;obtaining GPS metrics from the GPS receiver data;evaluating, by a computer, a positioning quality of the GPS receiver data, by analyzing the GPS metrics with a computer, thereby obtaining positioning quality metrics; anddisplaying to a user the measurement quality metrics and/or positioning quality metrics.2. The method of claim 1 , wherein the evaluating claim 1 , by a computer claim 1 , the measurement quality comprises steps taken from the group of: counting a number of satellites tracked by a GPS receiver claim 1 , measuring a length of continuous tracking of the satellites claim 1 , measuring gaps in the tracking of the satellites claim 1 , measuring absolute and/or relative temporal variations in signal to noise ratio of the GPS receiver data claim 1 , determining multipath noise in the GPS receiver data claim 1 , determining systematic errors claim 1 , biases and/or drifts in the GPS receiver data.3. The method of claim 1 , wherein the evaluating claim 1 , by a computer claim 1 , the positioning quality comprises steps taken from the group of: measuring temporal variations in a position of a GPS receiver claim 1 , measuring variations in a clock of the GPS receiver claim 1 , measuring variations in troposphere relevant for reception of the GPS receiver data claim 1 , measuring post-fit residuals claim 1 , determining a distribution of measurements by an elevation of line-of-sight from a local horizon to GPS ...

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Номер записи: 86

13-02-2014 дата публикации

Reference clock calibration

Номер: US20140044096A1

Автор: Frederic Bossy, Greg Heinrich

Принадлежит: Nvidia Corp

An apparatus comprising: a first transceiver arranged to communicate over a wireless network, the first transceiver comprising a first clock; and a second transceiver arranged to communicate other than by said wireless network, the second transceiver comprising a second clock. The second sends a request signal to the first transceiver. In response, the first transceiver transitions from a first mode to a second mode and provides to the second transceiver a response signal for calibrating the second clock relative to the first clock. In the first mode the first transceiver performs zero or more calibrations of the first clock relative to the wireless network, and in the second mode the first transceiver performs at least one additional calibration of the first clock relative to the wireless network, the response signal being based on the at least one additional calibration.

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Номер записи: 87

27-02-2014 дата публикации

Method and System for Adjusting a Measurement Cycle in a Wireless Receiver

Номер: US20140055301A1

Автор: Charles Abraham

Принадлежит: Global Locate Inc

A method for adjusting a frequency of a measurement cycle in a wireless receiver is described. The method includes adjusting a measurement cycle in a wireless receiver by computing a position state comprising at least one of a velocity and a heading of the satellite signal receiver, detecting a change in the position state, and automatically adjusting a frequency of said measurement cycle in response to the change in the position state.

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Номер записи: 88

06-03-2014 дата публикации

Method and Apparatus for Synchronizing Navigation Data

Номер: US20140062766A1

Автор: Gou Juan, Su Yen-Jung, Zou Jinghua

Принадлежит: O2MICRO INC.

Method, apparatus, and programs for synchronizing navigation data. Data synchronization is established between a receiver and a navigation device based on matching of a header of navigation data. The receiver receives the navigation data from the navigation device. If, subsequently, the data synchronization is interrupted, information related to the data synchronization from the receiver is retrieved. The data synchronization is then re-established between the receiver and the navigation device based on the retrieved information. 1. A method implement on a machine having a processor and memory for synchronizing navigation data , the method comprising the steps of:establishing data synchronization between a receiver and a navigation device based on matching of a header of navigation data, wherein the receiver receives the navigation data from the navigation device;if, subsequently, the data synchronization is interrupted, retrieving information related to the data synchronization from the receiver; andre-establishing the data synchronization between the receiver and the navigation device based on the retrieved information.2. The method of claim 1 , wherein the navigation device includes a satellite.3. The method of claim 1 , wherein the information related to the data synchronization includes at least one of:an ephemeris of the navigation device;a position of the receiver;time of week (TOW) and navigation bit count;information related to clock synchronization between a clock of the navigation device and a local clock of the receiver;information related to the local clock of the receiver; andinformation related to data synchronization between the receiver and a reference navigation device.4. The method of claim 1 , whereinthe retrieved information includes an ephemeris of the navigation device and a position of the receiver; anda local clock of the receiver has been synchronized with a clock of the navigation device5. The method of claim 4 , wherein the step of re- ...

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Номер записи: 89

06-03-2014 дата публикации

System and Method for Locating a Satellite Signal Receiver

Номер: US20140062769A1

Автор: Ke Gao, Mao Liu

Принадлежит: O2Micro Inc

System and method for locating a satellite signal receiver are disclosed. The system includes a channel opening module, a signal processing module, and a positioning module. The channel opening module is configured for opening a predetermined number of channels based on a priority schedule. The signal processing module is configured for capturing and tracking satellite signals via the opened channels, and demodulating the tracked satellite signals to obtain corresponding satellite data. The positioning module is configured for determining a position of the satellite signal receiver based on the satellite data.

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Номер записи: 90

06-03-2014 дата публикации

Satellite Signal Receiver and Method for Updating Ephemeris Information Thereby

Номер: US20140062770A1

Автор: Gao Ke, Liu Mao

Принадлежит: O2MICRO INC.

A satellite signal receiver and a method for updating ephemeris information thereby are disclosed. The receiver includes an instruction module, a signal processing module, and an update module. The instruction module is configured to send an instruction for updating ephemeris information at a set time interval. The signal processing module is configured to obtain corresponding satellite data. The update module is configured to update the ephemeris information according to the obtained satellite data in response to the instruction for updating ephemeris information. 1. A satellite signal receiver , comprising:an instruction module configured to send an instruction for updating ephemeris information at a set time interval;a signal processing module configured to obtain corresponding satellite data; andan update module configured to update the ephemeris information according to the obtained satellite data in response to the instruction for updating ephemeris information.2. The receiver of claim 1 , wherein the signal processing module comprises:a capturing unit configured to capture satellite signals in response to the instruction for updating ephemeris information;a tracking unit configured to track the satellite signals captured by the capturing unit in response to the instruction for updating ephemeris information; anda demodulation unit configured to demodulate the satellite signals tracked by the tracking unit in response to the instruction for updating ephemeris information, and obtain corresponding satellite data.3. The receiver of claim 2 , further comprising:a signal intensity determination module configured to determine if the intensity value of the satellite signals is less than a predetermined threshold value,wherein the update module does not respond to the instruction for updating ephemeris information if the intensity value of the satellite signals is less than the predetermined threshold value.4. The receiver of claim 3 , further comprising:a counting ...

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Номер записи: 91

06-03-2014 дата публикации

DETECTION AND CORRECTION OF CARRIER PHASE INCONSISTENCY DURING THE TRACKING OF A RADIO NAVIGATION SIGNAL

Номер: US20140062771A1

Автор: Lebrat Jean-Philippe

Принадлежит:

The invention relates to a method for tracking the carrier phase of a signal received from a satellite by a carrier using a carrier loop of the carrier phase, said signal being acquired by a navigation system of the carrier, said navigation system including a receiver for location by radio navigation, and a self-contained unit, wherein the receiver is suitable for acquiring and tracking the phase of the carrier of the signal from the satellite. 1102010. A method for tracking the carrier phase of a signal received from a satellite by a carrier by means of a carrier phase tracking loop , said signal being acquired by a navigation system of the carrier which comprises a localization receiver () by radio navigation and a self-contained unit () , the receiver () being adapted for acquiring and tracking the phase of the carrier of the signal from the satellite , the method comprising the following steps:{'b': '1', 'determining (E) a closed-loop control error of the carrier phase loop, said closed-loop control error being determined between two sampling instants and corresponding to a first phase deviation;'}{'b': 2', '20, 'determining (E) an acceleration variation of the carrier between the two sampling instants by means of the self-contained unit ();'}{'b': '3', 'projecting (E) the acceleration variation on a satellite-receiver view axis for obtaining a second phase deviation;'}{'b': '4', 'comparing (E) the first and second deviations in order to detect an error on the measurement of the carrier phase tracked by said carrier phase loop, said comparison consisting of determining inconsistency of the first deviation with the second deviation.'}221. The method according to claim 1 , wherein the acceleration variation of the carrier is obtained by means of a numerical model implemented in a module () of the navigation system.321. The method according to claim 1 , wherein the acceleration variation of the carrier is determined by means of an inertial unit () of the navigation ...

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Номер записи: 92

06-03-2014 дата публикации

Fast gps recovery using map vector data

Номер: US20140062777A1

Автор: Glenn D. MacGougan, Robert W. Mayor, Stephen J. Rhee

Принадлежит: Apple Inc

Methods and apparatuses to assist a global positioning system (GPS) module to determine GPS position estimates for a wireless communication device is disclosed. Processing circuitry in the wireless communication device determines a potential or an actual inaccuracy in a GPS position estimate obtained from a GPS module. The processing circuitry obtains a set of map vector data stored in or associated with the wireless communication device. The processing circuitry determines a location estimate of the wireless communication device based on at least a portion of the set of map vector data. The processing circuitry provides the location estimate to the GPS module and obtains an updated GPS position estimate from the GPS module, the updated GPS position estimate based at least in part on the location estimate provided to the GPS module.

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Номер записи: 93

06-03-2014 дата публикации

CYCLE SLIP DETECTION

Номер: US20140062778A1

Автор: ASHJAEE Javad, YUDANOV Sergey

Принадлежит: JAVAD GNSS, Inc.

Systems and methods for detecting and displaying cycle slips are provided. In one example method, a first L1 signal and a second L2 signal may be received. The coarse/acquisition code from the L1 signal may be extracted and may be monitored to detect a phase shift in the code. In response to detecting a phase shift in the code, a data bit of the L1 signal may be monitored for a predetermined length of time to detect a change in the data bit. A cycle slip may be detected in response to detecting a change in the data bit during the predetermined length of time. In another example, a cycle slip may be detected in response to detecting a change between a phase of the L1 signal and a phase of the L2 signal. 1. A computer-implemented method for detecting cycle slips in a global navigation satellite system (GNSS) device , the method comprising:receiving, by a GNSS receiver, a first signal from a GNSS satellite;extracting a coarse/acquisition (C/A) code from the first signal;detecting a phase shift in the C/A code; anddetecting a cycle slip in response to detecting a change in a data bit of the first signal within a predetermined length of time after detecting the phase shift in the C/A code.2. The method of claim 1 , wherein the first signal comprises an L1 signal.3. The method of claim 1 , further comprising:receiving, by the GNSS receiver, a second signal from the GNSS satellite; anddetecting the cycle slip in response to a change between a phase of the first signal and a phase of the second signal.4. The method of claim 3 , wherein the second signal comprises an L2 signal.5. The method of claim 3 , wherein detecting the cycle slip in response to the change between the phase of the first signal and the phase of the second signal comprises:compensating the phase of the first signal for multipath and ionosphere effects;compensating the phase of the second signal for multipath and ionosphere effects; anddetecting the cycle slip in response to a change between the ...

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Номер записи: 94

06-03-2014 дата публикации

FAST TRANSFORM BASED OFFSET DETERMINATION

Номер: US20140062779A1

Автор: Adib Fadel, Al-Hassanieh Haitham Zuhair, INDYK Piotr, Katabi Dina

Принадлежит: Massachusetts Institute of Technology

An offset estimator (e.g., a time delay, a spatial image offset, etc.) makes use of a transform approach (e.g., using Fast Fourier Transforms). The sparse nature of a cross-correlation is exploited by limiting the computation required in either or both of the forward and inverse transforms. For example, only a subset of the transform values (e.g., a regular subsampling of the values) is used. In some examples, an inverse transform yields a time aliased version of the cross-correlation. Further processing then identifies the most likely offset of the original signals by considering offsets that are consistent with the aliased output. 1. Method for determining a relative offset estimate between a first signal and a second signal comprising:acquiring at least one of the first signal and the second signal;for each of the first signal and the second signal, determining a subset of transform coefficients of said signal;combining the subsets of the transform coefficients to determine a subset of transform coefficients of a correlation signal;performing an inverse transform of the subset of the transform coefficients of the correlation signal yielding a modified correlation signal;determining a set of two of more relative offsets consistent with the modified correlation signal;determining the relative offset estimate, including performing a correlation computation using the first and the second signals at multiple of the two of more relative offsets; andproviding a data signal representing the relative offset estimate.2. The method of wherein acquiring the at least one of the first signal and the second signal comprises receiving and demodulating a radio positioning system signal to yield the second signal at a receiver.3. The method of wherein the first signal comprises a pseudo-random signal known to the receiver claim 2 , wherein a component of the second signal includes the pseudo-random signal claim 2 , and wherein the relative offset estimate characterized a time ...

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Номер записи: 95

06-03-2014 дата публикации

Method and Apparatus for Synchronizing Navigation Data

Номер: US20140062780A1

Автор: Gou Juan, Su Yen-Jung, Zou Jinghua

Принадлежит: O2MICRO INC.

Method, apparatus, and programs for synchronizing navigation data. First synchronization information is obtained from a receiver. The first synchronization information was used for synchronizing first navigation data received by the receiver from a navigation device. A sending time of second navigation data sent from the navigation device is then determined based on the first synchronization information. Second synchronization information is computed based on the sending time of the navigation data. The second synchronization information is used for synchronizing the second navigation data. 1. A method implement on a machine having a processor and memory for synchronizing navigation data , the method comprising the steps of:obtaining first synchronization information from a receiver, wherein the first synchronization information was used for synchronizing first navigation data received by the receiver from a navigation device;determining a sending time of second navigation data sent from the navigation device based on the first synchronizing information; andcomputing second synchronization information based on the sending time of the navigation data, wherein the second synchronization information is used for synchronizing the second navigation data.2. The method of claim 1 , wherein the navigation device includes a satellite.3. The method of claim 1 , wherein the second synchronization information includes time of week (TOW) and navigation bit count.4. The method of claim 1 , wherein a local clock of the receiver continuously runs for a time interval between the first navigation data and the second navigation data.5. The method of claim 4 , wherein the step of determining a sending time includes the steps of:obtaining TOW and navigation bit count of the first navigation data from the first synchronizing information;obtaining the time interval from the local clock of the receiver; andcalculating the sending time of the second navigation data based on the TOW and ...

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Номер записи: 96

06-03-2014 дата публикации

GNSS LONG-CODE ACQUISITION, AMBIGUITY RESOLUTION, AND SIGNAL VALIDATION

Номер: US20140062781A1

Автор: MacDoran Peter F., Mathews Michael B.

Принадлежит: Loctronix Corporation

The present invention relates to a system and method using hybrid spectral compression and cross correlation signal processing of signals of opportunity, which may include Global Navigation Satellite System (GNSS) as well as other wideband energy emissions in GNSS obstructed environments. Combining spectral compression with spread spectrum cross correlation provides unique advantages for positioning and navigation applications including carrier phase observable ambiguity resolution and direct, long-code spread spectrum signal acquisition. Alternatively, the present invention also provides unique advantages for establishing the validity of navigation signals in order to counter the possibilities of electronic attack using spoofing and/or denial methods. 1. A system for providing direct acquisition of a long code spread spectrum RF emission , comprising:at least one emitter that emits a spread spectrum RF emission using long code sequence within a transmission medium; a spectral compressor configured to process the intercepted long code spread spectrum RF emission using spectral compression utilizing a non-linear operation to produce at least one of a chipping or a carrier-related observable;', 'a physical state estimator configured to determine at least one member of a relative physical state between the interceptor and the at least one emitter and a domain of code chips for at least one long code assigned to the at least one emitter based on the at least one observable; and', 'a long-code cross correlator configured to search a domain of code chips for a long code assigned to the at least one emitter., 'at least one interceptor that receives the emission propagated through the transmission medium from the at least one emitter, the interceptor comprising2. The system of claim 1 , wherein:the spread spectrum RF emission has a plurality of long code sequence signals; andthe spectral compressor is configured to process the plurality of long code sequence signals to ...

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Номер записи: 97

13-03-2014 дата публикации

INTERFERENCE WAVE SIGNAL REMOVING DEVICE, GNSS RECEPTION APPARATUS, MOBILE TERMINAL, INTERFERENCE WAVE SIGNAL REMOVING PROGRAM AND INTERFERENCE WAVE REMOVING METHOD

Номер: US20140070989A1

Автор: KONDO Hitoshi, Wang Dun

Принадлежит: FURUNO ELECTRIC CO., LTD.

An interference wave signal frequency is highly accurate and the interference wave signal is surely removed. A controller of an interference wave signal remover detects the interference wave signal based on a frequency scanning result by an entire-range frequency scanner, and sets a notch filter to attenuate the interference wave signal frequency. A local scan frequency band BWfof a local frequency scanner is set by having the interference wave signal frequency as its central frequency, and local scan frequencies BINare set so that frequency bands overlap with each other between adjacent frequency BIN. The local frequency scanner frequency-scans input signals to the notch filter. The controller calculates a frequency error δf of the interference wave signal frequency from the local frequency scanner, corrects the interference wave signal frequency which is from the entire-range frequency scanner by the frequency error δf, and updates the setting of the notch filter. 1. An interference wave signal removing device for removing an interference wave signal different from a desired signal that is contained in reception signals , comprising:a notch filter adjustable of an attenuation frequency band;a frequency scanner for outputting integrated signals of the reception signals at respective frequency bins which having a predetermined frequency width and partially overlapping with each other in a scan frequency band; anda controller for detecting a frequency of the interference wave signal and setting the attenuation frequency band of the notch filter based on intensities of the integrated signals of the respective frequency bins,wherein the controller calculates an estimation of error of the interference wave signal frequency based on the intensities of the integrated signals of the respective frequency bins, corrects the detected interference wave signal frequency by the error, and sets the attenuation frequency band of the notch filter.2. The interference wave signal ...

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Номер записи: 98

13-03-2014 дата публикации

Method, Apparatus, and System for Determining a Position of an Object Having a Global Navigation Satellite System Receiver by Processing Undifferenced Data Like Carrier-Phase Measurements and External Products Like Ionosphere Data

Номер: US20140070992A1

Автор: Hernandez-Pajares Manuel, Juan Zornoza José Miguel, Samson Jaron, Sanz Subirana Jaume, Tossaint Michel Mathias Maria

Принадлежит: EUROPEAN SPACE AGENCY

A method for determining a position of an object having a Global Navigation Satellite System (GNSS) receiver comprises receiving signals that are transmitted by GNSS transmitters positioned on board satellites positioned in view of the object; updating service data in the object, the service data including satellite clock data, satellite orbit data, satellite delay code bias data relating to delay code biases of the GNSS transmitters, and ionospheric model data indicating a state of an ionosphere; determining, based on the ionospheric model data, ionospheric delay data indicating corrections relating to delays of the signals, the delays of the signals resulting from passage of the signals through the ionosphere, and reception of the signals by the GNSS receiver; and determining a position of the object based on the signals, the satellite clock data, the satellite orbit data, the satellite delay code bias data, and the determined ionospheric delay data. 1. A method for determining a position of an object having a Global Navigation Satellite System (GNSS) receiver , the method comprising the steps of:{'sub': E1', 'En', '1', 'n, 'receiving signals by the GNSS receiver that are transmitted by GNSS transmitters (GNSSto GNSS) positioned on board satellites (SATto SAT) that are positioned in view of the object;'} [{'sub': 1', 'n, 'satellite clock data indicating internal clocks of the satellites (SATto SAT);'}, {'sub': 1', 'n, 'satellite orbit data indicating positions of the satellites (SATto SAT);'}, {'sub': E1', 'En, 'satellite delay code bias data relating to delay code biases of the GNSS transmitters (GNSSto GNSS); and'}, 'ionospheric model data indicating a state of an ionosphere;, 'updating service data in the object, the service data being provided by a GNSS service provider and including{'sub': E1', 'En', 'GNSS, 'determining, based on the ionospheric model data, ionospheric delay data indicating corrections relating to delays of the signals, the delays of the ...

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Номер записи: 99

13-03-2014 дата публикации

Decoding method and receiving device

Номер: US20140072017A1

Автор: Naoki Gobara

Принадлежит: Seiko Epson Corp

A first correlation calculation is performed based on a first predicted frequency, with respect to received data of a GPS satellite signal. An error frequency of the first predicted frequency is estimated using a carrier phase of the GPS satellite signal based on the result of the first correlation calculation. The first predicted frequency is corrected using the error frequency, and a second predicted frequency is thus calculated. Then, a second correlation calculation is performed with respect to the same received data, based on the second predicted frequency. A navigation message carried on the GPS satellite signal is decoded using the result of the second correlation calculation.

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Номер записи: 100