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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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03-05-2012 дата публикации

Methods and systems for enabling feedback in wireless communication networks

Номер: US20120106483A1

Автор: Hang Zhang, Jianglei Ma, Mo-Han Fong, Peiying Zhu, Wen Tong

Принадлежит: ROCKSTAR BIDCO LP

Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented.

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Номер записи: 1

10-05-2012 дата публикации

Method for Processing Data

Номер: US20120114016A1

Автор: Joachim Wehinger

Принадлежит: INFINEON TECHNOLOGIES AG

A method includes encoding data according to a space time transmit diversity scheme and spatial-multiplexing the encoded data.

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Номер записи: 2

07-06-2012 дата публикации

Method and apparatus for antenna diversity in multi-input multi-output communication systems

Номер: US20120140798A1

Автор: Aamod Khandekar, Alexei Gorokhov, Dhananjay Ashok Gore, Tamer Kadous

Принадлежит: Qualcomm Inc

Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.

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Номер записи: 3

09-08-2012 дата публикации

Transmit methods with delay diversity and space-frequency diversity

Номер: US20120201329A1

Автор: Cornelius van Rensburg, Farooo Khan, Jianzhong Zhang, Yinong Ding

Принадлежит: Individual

In this invention, several open-loop solutions that encompass the small delay CDD codeword cycling, codeword cycling between different re-transmissions of both small and large delay CDD are proposed. In addition, an open-loop codeword cycling method for SFBC+FSTD scheme, as well as its extension to SFBC+FSTD based HARQ, are proposed. In one method, a plurality of information bits are encoded, scrambled and modulated to generate a plurality of modulation symbols. The plurality of modulation symbols are mapped onto the subcarriers in at least one transmission layer of a transmission resource. The modulation symbols are then precoded by using a matrix for cyclic delay diversity and a set of codewords from a certain codebook to generate a plurality of precoded symbols. The codewords are cycled for every a certain number of subcarriers. Finally, the precoded symbols are transmitted via a plurality of transmission antennas.

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Номер записи: 4

23-08-2012 дата публикации

Repetitive transmissions in multi-carrier based wireless access techniques

Номер: US20120216092A1

Автор: Jae-Won Chang, Jin-Hyuk Jung, Jin-Young Chun, Moon-Il Lee

Принадлежит: LG ELECTRONICS INC

According to one embodiment, a method for repetitive transmission using a plurality of sub-carriers includes: preparing a symbol to be transmitted using the plurality of sub-carriers within a single time domain unit; repeating the symbol a predetermined number (N) of times; applying a corresponding one of N different cyclic shift values to each of the N repeated symbols to be transmitted using the plurality of sub-carriers within the single time domain unit; performing an IFFT (Inverse Fast Fourier Transform) on each of the N repeated symbols to which the corresponding one of the N different cyclic shift values is applied; and transmitting the N repeated symbols on which the IFFT is performed using the plurality of sub-carriers.

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Номер записи: 5

04-10-2012 дата публикации

Transmitter for communications system

Номер: US20120252381A1

Автор: Kimihiko Imamura, Ryota Yamada, Toshizo Nogami

Принадлежит: Kimihiko Imamura, Ryota Yamada, Toshizo Nogami

An rf signal transmitter for transmitting rf signals through a plurality of antennas is described, which comprises: a transmit section adapted to selectively set, with respect to an input signal, the initial phase of an output to at least one of said antennas depending on a time or frequency region used for communication and to provide delay to the output on an antenna-by-antenna basis and on the basis of a transmission timing or a transmission frequency; and a quality information receive section for receiving quality information from destination station, i.e., a wireless terminal unit, said quality information concerning the rf signal transmitted from said transmit section and received at said destination station.

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Номер записи: 6

11-10-2012 дата публикации

Subscriber Station Transceiver Allocation of Groups of Subcarriers Between a Plurality of Transceiver Antennas

Номер: US20120257593A1

Автор: Louay Jalloul, Robert G. Lorenz, Sam P. Alex

Принадлежит: Broadcom Corp

Embodiments for at least one method and apparatus of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas are disclosed. One method includes the subscriber station transceiver receiving at least one downlink signal through each of the plurality of subscriber station antennas. The subscriber station transceiver characterizes a received signal of the at least one downlink signal over multiple subcarriers. The subscriber station transceiver allocates groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas, wherein the allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers.

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Номер записи: 7

11-10-2012 дата публикации

Transmission and reception apparatus and method

Номер: US20120257688A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Panasonic Corp

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

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Номер записи: 8

22-11-2012 дата публикации

Circular stapler with automatic locking mechanism

Номер: US20120292368A1

Автор: Anil K. Nalagatla, Barry Thomas Jamison, David A. Deupree, DEBASISH Pradhan, Pathik Aguan, Shrikant Udayrao Puranik

Принадлежит: Ethicon Endo Surgery Inc

A circular stapling instrument includes a casing, an anvil assembly, a staple driver, and a locking mechanism. The anvil assembly is configured to move back and forth between an open position away from the casing and a closed position adjacent the casing. The staple driver is configured to move within the casing from a pre-fired position to a fired position. The locking mechanism is configured to, whenever the anvil assembly is in the open position, automatically lock the staple driver in the pre-fired position preventing the staple driver from being moved to the fired position. The locking mechanism is also configured to, whenever the anvil assembly is in the closed position, automatically unlock the staple driver from the pre-fired position to allow the staple driver to be moved to the fired position.

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Номер записи: 9

17-01-2013 дата публикации

Multi-site mimo cooperation in cellular network

Номер: US20130016662A1

Автор: HUA Xu, Jiangei Ma, Mohammadhadi Baligh

Принадлежит: Individual

In a cellular communications network comprising a plurality of transmitting sites wherein each transmitting site comprises at least one antenna, a method of serving a given data stream to a target-mobile terminal, comprising: designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique.

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Номер записи: 10

23-05-2013 дата публикации

Transmission method, transmitter, and receiver for multi antenna wireless communication system

Номер: US20130129001A1

Автор: Koji Akita, Ren Sakata

Принадлежит: Toshiba Corp

A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.

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Номер записи: 11

06-06-2013 дата публикации

Systems and methods for communication over a plurality of frequencies and streams

Номер: US20130142275A1

Автор: Eugene J. Baik, Hemanth Sampath, Lin Yang, Sameer Vermani

Принадлежит: Qualcomm Inc

Methods and devices for communicating in a communication system are described herein. One aspect provides a method of communicating over one or more space-time streams. The method includes transmitting a first stream with a bandwidth of 2 MHz or less. The method further includes transmitting, when there are at least two streams, a second stream with a cyclic shift delay relative to the first stream equal to half a period. The method further includes transmitting, when there are at least three streams, a third stream with a cyclic shift delay relative to one of the first and second stream equal to a quarter of the period. The method further includes transmitting, when there are at least four streams, a fourth stream with a cyclic shift delay relative to the other of the first and second stream equal to a quarter of the period.

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Номер записи: 12

06-06-2013 дата публикации

Systems and methods for communication over a plurality of frequencies and streams

Номер: US20130142276A1

Автор: Eugene J. Baik, Hemanth Sampath, Lin Yang, Sameer Vermani

Принадлежит: Qualcomm Inc

Methods and devices for communicating in a communication system are described herein. One aspect of the subject matter described in the disclosure provides a method of communicating over one or more space-time streams. The method includes transmitting a precoded portion of a first stream with a bandwidth of 1 MHz or less. The method further includes transmitting, when there are at least two streams, a precoded portion of a second stream with a cyclic shift delay, relative to the first stream, of 4 μs. The method further includes transmitting, when there are at least three streams, a precoded portion of a third stream with a cyclic shift delay, relative to the first stream, of 1 μs. The method further includes transmitting, when there are at least four streams, a precoded portion of a fourth stream with a cyclic shift delay, relative to the first stream, of 5 μs.

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Номер записи: 13

27-06-2013 дата публикации

Method for Transmitting a Data Signal in a MIMO System

Номер: US20130163691A1

Автор: Christian Drewes, Markus Mueck, WEN Xu

Принадлежит: Christian Drewes, Markus Mueck, WEN Xu

A method for transmitting a data signal by a transmission unit of a wireless multiple-input/multiple-output (MI MO) communication system. The communication system includes the transmission unit and a reception unit, the transmission unit having a plurality of transmission antennas and the reception unit having a plurality of reception antennas. The method includes performing a first transmission of a data signal, the first transmission including transmitting the data signal by each one of the plurality of transmission antennas, and performing a second transmission of the data signal at a time later than the first transmission, the second transmission including transmitting at least one spectrally modified signal variant of the data signal by at least one antenna of the plurality of transmission antennas.

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Номер записи: 14

26-09-2013 дата публикации

Method and system for enhanced transmission in mobile communication networks

Номер: US20130250789A1

Автор: Brendan McWilliams, Yannick Le Pezennec

Принадлежит: Vodafone IP Licensing Ltd

A transmission method and system for use in a base station of a mobile communication network. It provides a simple and efficient technique which improves the performance of prior art solutions for MIMO user equipments (especially in bad or medium radio conditions scenarios).

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Номер записи: 15

26-09-2013 дата публикации

Method and apparatus for transmission mode design for extension carrier of lte advanced

Номер: US20130250879A1

Автор: Boon Loong Ng, Jianzhong Zhang, Young-Han Nam

Принадлежит: SAMSUNG ELECTRONICS CO LTD

A system and method includes transmission mode design for Extension Carrier of LTE-Advanced. The system includes a base station capable of communicating with subscriber stations using an extension carrier. The extension carrier is not backwards compatible and does not transmit any LTE Release 8-10 cell-specific reference signals (CRS) or Physical Downlink Control Channel. The system including transmission mode design for Extension Carrier of LTE-Advanced uses a basic demodulation reference signal transmission scheme (Basic DM-RS TS) when the PDSCH transmission uses DCI format 1A. Basic DM-RS TS uses DM-RS ports and does not uses CRS ports.

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Номер записи: 16

03-10-2013 дата публикации

Beamforming method, apparatus for polarized antenna array and radio communication device and system thereof

Номер: US20130257655A1

Автор: David Astely, Hai Wang, Muhammad Imadur Rahman, Ruiqi ZHANG, YANG Hu, Zhiheng Guo

Принадлежит: Telefonaktiebolaget LM Ericsson AB

The invention discloses a beamforming method for polarized antenna array consisting of a plurality of antenna elements, applied to single layer beamforming or dual layer beamforming, which includes the steps: determining ( 201 ) first beamforming weights for phase compensation among the antenna elements within each polarization direction; determining ( 202 ) second beamforming weights for phase compensation between equivalent channels of two polarization directions; and calculating ( 203 ) hybrid beamforming weights as product of the first beamforming weights and the second beamforming weights. A beamforming apparatus for polarized antenna array is also provided in the invention as well as a radio communication device and a system thereof. With the invention, the single-layer and dual-layer beamforming weights are determined for the cross-polarized antenna array without requiring full channel knowledge or the aid of PMI. Computation complexity is lowered and full power amplifier utilization can be achieved.

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Номер записи: 17

21-11-2013 дата публикации

Communication apparatus and communication method

Номер: US20130308723A1

Автор: Takeo Miyata

Принадлежит: Kyocera Corp

When a determination is made that communication by an SM scheme is suitable, a setting unit performs switching from a communication level by an STC scheme to the communication level by the SM scheme, between the communication level at a first level of MCS by the space-time coding scheme and the communication level at a second level of MCS by the SM scheme. When a determination is made that communication by the SM scheme is unsuitable, the setting unit performs switching from the communication level by the STC scheme to the communication level by the spatial multiplexing scheme, between the communication level at a third level of MCS, which is higher than the first level, by the space-time coding scheme and a fourth level of the modulation scheme and the coding rate, which is higher than the second level, by the SM scheme.

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Номер записи: 18

12-12-2013 дата публикации

Subscriber Station Transceiver Allocation of Groups of Subcarriers Between a Plurality of Transceiver Antennas

Номер: US20130329679A1

Автор: Louay Jalloul, Robert G. Lorenz, Sam P. Alex

Принадлежит: Broadcom Corp

Embodiments for at least one method and apparatus of a subscriber station transceiver allocating and transmitting groups of subcarriers between a plurality of transceiver antennas are disclosed. One method includes the subscriber station transceiver receiving at least one downlink signal through each of the plurality of subscriber station antennas. The subscriber station transceiver characterizes a received signal of the at least one downlink signal over multiple subcarriers. The subscriber station transceiver allocates groups of subcarriers for uplink transmission through each of the plurality of subscriber antennas, wherein the allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers.

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Номер записи: 19

19-12-2013 дата публикации

Apparatus and methods for flexible rf configuratoin in multi-antenna wireless systems

Номер: US20130336242A1

Автор: Farooq Khan, Jianzhong Zhang, Krishna SAYANA, Richard Stirling-Gallacher, Sridhar Rajagopal

Принадлежит: SAMSUNG ELECTRONICS CO LTD

An apparatus includes a baseband signal processing block, processing circuitry, and at least one radio frequency (RF) communication module communicably coupled to the baseband signal processing block and configured to communicate using a selected mode of communication in a channel. The processing circuitry is configured to detect a sub-channel band of unavailable spectrum within the channel, the band of unavailable spectrum being less than a whole of the channel. The channel includes one contiguous band of frequencies divisible into at least two non-overlapping non-adjacent sub-channels. The processing circuitry is configured to select one mode of communication selected from a plurality of modes including: a carrier aggregation (CA) only mode, a multiple input multiple output (MIMO) only mode, and a carrier aggregation multiple input multiple output (CA-MIMO) hybrid mode.

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Номер записи: 20

16-01-2014 дата публикации

Phase-rotated reference signals for multiple antennas

Номер: US20140016451A1

Автор: Chandra Sekhar Bontu, Siva Dharshan Muruganathan, Tarik Tabet, Yi Song, Zhijun Cai

Принадлежит: Individual

Systems, methods, and apparatuses for phase-rotated reference signals are provided. In accordance with one implementation, phase-rotated reference signals are transmitted from multiple transmit antennas on the same reference signal (RS) resource elements. The receiver may determine channel coefficients for links corresponding to the multiple antennas, based on the received signals at the RS resource elements. Time-domain filtering or frequency-domain orthogonal codes may be used to determine the channel coefficients for links corresponding to the multiple antennas. The phase-rotation information may be broadcasted in a system information block (SIB) message or signaled in a radio resource control (RRC) message.

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Номер записи: 21

16-01-2014 дата публикации

Phase-rotated reference signals for multiple antennas

Номер: US20140016681A1

Автор: Chandra Sekhar Bontu, Siva Dharshan Muruganathan, Tarik Tabet, Yi Song, Zhijun Cai

Принадлежит: Individual

Systems, methods, and apparatuses for phase-rotated reference signals are provided. In accordance with one implementation, phase-rotated reference signals are transmitted from multiple transmit antennas on the same reference signal (RS) resource elements. The receiver may determine channel coefficients for links corresponding to the multiple antennas, based on the received signals at the RS resource elements. Time-domain filtering or frequency-domain orthogonal codes may be used to determine the channel coefficients for links corresponding to the multiple antennas. The phase-rotation information may be broadcasted in a system information block (SIB) message or signaled in a radio resource control (RRC) message.

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Номер записи: 22

30-01-2014 дата публикации

Preamble extensions

Номер: US20140029685A1

Автор: Albert Van Zelst, Didier Johannes Richard Van Nee, Geert Arnout Awater

Принадлежит: Qualcomm Inc

Systems and/or methods for communication that generate a plurality of spatial streams are disclosed. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training sequence is distributed across a first symbol in a first one of the spatial streams and a second symbol in a second one of the spatial streams.

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Номер записи: 23

01-01-2015 дата публикации

Multi-site mimo cooperation in cellular networks

Номер: US20150003431A9

Автор: HUA Xu, Jianglei Ma, Mohammadhadi Baligh

Принадлежит: Individual

A method of serving a given data stream to a target mobile terminal, in a cellular communications network that includes a plurality of transmitting sites wherein each transmitting site including at least one antenna, is provided. The method includes designating at least two of the plurality of transmitting sites as cooperating sites; assigning tones to each transmitting site from a sub-band associated with the cooperating sites; dividing the data stream into at least two sub-data streams, each of the sub-data streams for transmission over selected tones; and interlacing tones of the cooperating sites in accordance with a selected one of a time switching and a frequency switching transmit diversity technique. Other techniques for multi-site MIMO cooperation are also provided.

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Номер записи: 24

04-01-2018 дата публикации

Method for transmitting radio signals from a base station, a system and a computer program product

Номер: US20180006671A1

Автор: Nidham Ben Rached, Patrick-Albert Krief

Принадлежит: Alcatel Lucent SAS

A method, in a telecommunications system, for transmitting radio signals from a base station comprising at least a pair of transmission branches configured to supply output signals for respective antennae of the base station, to at least one terminal comprising at least one antenna, the method comprising splitting a signal for transmission into at least first and second components, applying a phase shift to the first component to generate a modified first component and providing the modified first component and the second component to respective power amplifiers for transmission over the antennae.

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Номер записи: 25

04-01-2018 дата публикации

DESIGN OF MULTIUSER MIMO FOR LARGE ANTENNA SYSTEMS WITH HYBRID BEAMFORMING

Номер: US20180006696A1

Автор: Qi Xiao-Feng, Yue Guosen, Zhang Bohan

Принадлежит: Futurewei Technologis, Inc.

A hybrid combination of analog RF beamforming and digital pre-coding is used to improve signal-to-noise ratio and mitigate interference as between an RF base station and a plurality of wireless receivers within a cell area of the base station. Feedback overhead for beamforming training may be reduced by using indices for identifying the preferred beams of each wireless receiver. Scheduling for channel training may be based on identifying non-colliding ones of the RF beams and assigning these to corresponding wireless receivers which can best use the assigned beams in shared transmission slots. 1. A hybrid beamforming method by a base station , comprising:sequentially indexing through a finite set of RF output beam patterns using an analog beamforming subsystem of the base station while transmitting pilot signals;receiving wireless feedback reports from one or more terminals identifying at least one preferred RF output beam pattern as received by the respective feedback-providing terminal;assigning to one assignable transmission slot, two or more of the feedback-providing terminals for simultaneous use for forward link transmissions; andselecting different RF output beam patterns for carrying simultaneous data transmissions respectively for the two or more assigned terminals wherein the assigning of the two or more terminals to the assignable transmission slot and the selecting of the different RF output beams is based on the respective wireless feedback reports received by the base station.2. The method of wherein the base station has a plural number of available RF chains and a plural number of antennas operatively coupled to the available RF chains for forming the set of RF output beam patterns.3. The method of wherein said respective wireless feedback reports identifying preferred RF output beam patterns includes those identifying at least a strongest or best quality one of the received RF output beam patterns.4. The method of wherein said received signals for ...

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Номер записи: 26

04-01-2018 дата публикации

Channel State Feedback for a Wireless Link having Phase Relaxed Channels

Номер: US20180006700A1

Автор: Frenne Mattias, Harrison Robert Mark, Jöngren George

Принадлежит:

According to one of the aspects, there is provided a method for providing channel state feedback related to a wireless link between a transmitter having multiple transmit antennas and a receiver having at least one receive antenna. The method comprises determining (S) channel estimates for at least a subset of the effective channels between the transmitter and the receiver, each effective channel including a propagation channel, and signal paths in the transmitter and the receiver. The method also comprises determining (S) frequency-independent and/or inter-antenna-independent channel state information associated with phase relaxation of at least the subset of the effective channels based on the channel estimates, and generating (S) channel state feedback including at least a representation of the frequency-independent and/or inter-antenna-independent channel state information associated with the phase relaxation. The method further comprises transmitting (S) the channel state feedback to the transmitter. 142-. (canceled)43. A method for providing channel state feedback related to a wireless link between a transmitter having multiple transmit antennas and a receiver having at least one receive antenna , wherein the method comprises:determining channel estimates for at least a subset of effective channels between the transmitter and the receiver, each effective channel including a propagation channel, and signal paths in the transmitter and the receiver;determining frequency-independent and/or inter-antenna-independent channel state information associated with phase relaxation of at least the subset of the effective channels based on the channel estimates;generating channel state feedback, including at least a representation of the frequency-independent and/or inter-antenna-independent channel state information associated with the phase relaxation; andtransmitting the channel state feedback to the transmitter.44. The method of claim 43 , wherein each effective ...

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Номер записи: 27

07-01-2021 дата публикации

APPARATUS, SYSTEM AND METHOD OF COMMUNICATING A PHYSICAL LAYER PROTOCOL DATA UNIT (PPDU)

Номер: US20210006308A1

Автор: Cordeiro Carlos, Da Silva Claudio, Genossar Michael, Lomayev Artyom, Maltsev Alexander

Принадлежит: Intel IP Corporation

For example, an EDMG STA may generate an LDPC coded bit stream for a user based on data bits for the user in an EDMG PPDU, the LDPC coded bit stream for the user including a concatenation of a plurality of LDPC codewords, a count of the plurality of LDPC codewords is based at least on a codeword length for the user and on a code rate for the user; generate encoded and padded bits for the user by concatenating the LDPC coded bit stream with a plurality of coded pad zero bits, a count of the coded pad zero bits is based at least on a count of one or more spatial streams for the user and on the count of the plurality of LDPC codewords for the user; and distribute the encoded and padded bits for the user to the one or more spatial streams for the user. 1. An apparatus comprising: determine a count of data pad bits for a user based on a count of Low-Density Parity-Check (LDPC) codewords for the user, an LDPC codeword length for the user, an LDPC code rate for the user, and a length of a Physical Layer (PHY) Service Data Unit (PSDU) for the user;', 'determine scrambled PSDU bits for the user based on a concatenation of a scrambled PSDU for the user concatenated with a first plurality of zero bits, a count of zero bits in the first plurality of zero bits is equal to the count of data pad bits for the user;', 'convert the scrambled PSDU bits for the user into a plurality of LDPC codewords for the user;', 'generate a coded bitstream for the user based on the plurality of LDPC codewords for the user;', 'determine a count of coded pad bits for the user based on a count of Orthogonal Frequency Division Multiplexing (OFDM) symbols for the user, the count of LDPC codewords for the user, and the LDPC codeword length for the user;', 'generate encoded padded bits for the user based on a concatenation of bits of the coded bitstream for the user concatenated with a second plurality of zero bits, a count of zero bits in the second plurality of zero bits is equal to the count of coded ...

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Номер записи: 28

07-01-2021 дата публикации

APPARATUS, SYSTEM AND METHOD OF COMMUNICATING A PHYSICAL LAYER PROTOCOL DATA UNIT (PPDU)

Номер: US20210006309A1

Автор: Cordeiro Carlos, Da Silva Claudio, Genossar Michael, Lomayev Artyom, Maltsev Alexander

Принадлежит: Intel IP Corporation

For example, an EDMG STA may generate an LDPC coded bit stream for a user based on data bits for the user in an EDMG PPDU, the LDPC coded bit stream for the user including a concatenation of a plurality of LDPC codewords, a count of the plurality of LDPC codewords is based at least on a codeword length for the user and on a code rate for the user; generate encoded and padded bits for the user by concatenating the LDPC coded bit stream with a plurality of coded pad zero bits, a count of the coded pad zero bits is based at least on a count of one or more spatial streams for the user and on the count of the plurality of LDPC codewords for the user; and distribute the encoded and padded bits for the user to the one or more spatial streams for the user. 1. An apparatus comprising: convert Physical Layer (PHY) Service Data Unit (PSDU) bits for a user into a plurality of Low-Density Parity-Check (LDPC) codewords for the user according to an LDPC codeword length and an LDPC code rate of 7/8;', 'set a Superimposed-Code-Applied field according to the LDPC codeword length, wherein the Superimposed-Code-Applied field is configured to indicate whether the plurality of LDPC codewords are encoded according to a punctured LDPC code or a superimposed LDPC code; and', 'transmit an EDMG PHY Protocol Data Unit (PPDU) based on the plurality of LDPC codewords for the user, the EDMG PPDU comprising an EDMG header comprising the Superimposed-Code-Applied field; and, 'a processor comprising logic and circuitry configured to cause an Enhanced Directional Multi-Gigabit (DMG) (EDMG) wireless communication station (STA) toa memory to store information processed by the processor.2. The apparatus of claim 1 , wherein the punctured LDPC code corresponds to a first LDPC codeword length claim 1 , and the superimposed LDPC code corresponds to a second LDPC codeword length claim 1 , different from the first LDPC codeword length.3. The apparatus of claim 1 , wherein the Superimposed-Code-Applied field ...

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Номер записи: 29

03-01-2019 дата публикации

SIMULTANEOUS ANTENNA UTILIZATION IN MU-MIMO MODE

Номер: US20190007110A1

Автор: Gulbay Sinem, Koshy Kamal Joseph, Sultenfuss Andrew Thomas

Принадлежит: DELL PRODUCTS L.P.

A MIMO-enabled information handling system may have multiple antennas configured to transmit multiple spatial streams. In some modes, all antennas may be used such as during SU-MIMO communications. In other modes, less than all antennas may be used such as during MU-MIMO communications. When unused MIMO antennas are available during MU-MIMO mode, the elements may be reused for transmitting data for other wireless technologies or spectrums. For example, while transmitting MU-MIMO Wi-Fi data through one spatial stream, Bluetooth data may be simultaneously transmitted through one of the unused Wi-Fi MIMO antennas. 1. A method , comprising:communicating according to a first wireless technology in a first spectrum through a first antenna and a second antenna in a multiple-input-multiple-output (MIMO) mode;detecting multiple users sharing the first spectrum; and communicating according to the first wireless technology in the first spectrum through the first antenna; and', 'communicating according to a second wireless technology in a second spectrum through the second antenna simultaneously with communicating according to the first wireless technology in the first spectrum through the first antenna., 'when multiple users are detected in the first spectrum2. The method of claim 1 , wherein communicating according to the first wireless technology comprises communicating on a local area network (LAN) claim 1 , and wherein communicating according to the second wireless technology comprises communicating on a personal area network (PAN).3. The method of claim 1 , wherein communicating according to the first wireless technology comprises communicating on a Wi-Fi network claim 1 , and wherein communicating according to the second wireless technology comprises communicating on a Bluetooth network.4. The method of claim 1 , wherein the step of communicating according to the first wireless technology in the first spectrum through the first antenna when multiple users are detected in ...

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Номер записи: 30

27-01-2022 дата публикации

Method for selecting cyclic shift diversity sequence, and related apparatus

Номер: US20220029687A1

Автор: Kaifeng Xia, Ming GAN, Xin ZUO, Xun Yang

Принадлежит: Huawei Technologies Co Ltd

In a method of sending a frame using a cyclic shift diversity (CSD) sequence, a wireless device generates a frame comprising a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG) field, a repeated legacy signal (RL-SIG) field, an extremely high throughput signal A (EHT-SIG A) field, and an extremely high throughput signal B (EHT-SIG B) field. The wire device sends the frame through a set of transmit antennas by performing cyclic shift over the fields according to a CSD sequence. The number of transmit antennas is greater than 8. The number of cyclic shift diversities in the CSD sequence is equal to a number of the transmit antennas, and each cyclic shift diversity has a value that is a multiple of 12.5.

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Номер записи: 31

17-01-2019 дата публикации

BEAMFORMING USING PASSIVE TIME-DELAY STRUCTURES

Номер: US20190020399A1

Автор: Coutts Gordon Michael

Принадлежит:

Apparatuses, methods, and systems for beamforming to multiple users using switched passive time-delay structures are disclosed. One method includes an input switch that receives a plurality of input signals for transmission. Further, the apparatus includes a plurality of passive time-delay structures, wherein the input switch selectively connects the plurality of input signals to at least one of the plurality of passive time-delay structures, and wherein each of the passive time-delay structures is preconfigured to provide a plurality of delayed signals wherein each of the plurality of delayed signals is a delayed version of a one of the plurality of input signals. The apparatus further includes an antenna array, wherein the antenna array receives the plurality of delayed signals of the passive time-delay structures, and generates a beamforming pattern corresponding with a selected one of the passive time-delay structures. 1. An apparatus , comprising:a plurality of passive time-delay structures, wherein each of the plurality of passive time-delay structures is operative to generate a plurality of delayed signals, wherein the plurality of delayed signals is a delayed version of a plurality of communication signals;an antenna array, wherein the antenna array generates a beamforming pattern corresponding with a selected one of the plurality of passive time-delay structures; anda switch, wherein the switch operates to selectively connect the plurality of communication signals through the selected one of the plurality of passive time-delay structures to the antenna array.2. The apparatus of claim 1 , wherein each of the plurality of time-delay structures delay the plurality of communication signals to create a corresponding beamforming pattern by the antenna array.3. The apparatus of claim 2 , wherein the corresponding beamforming pattern formed by selection of each of the plurality of passive time-delay structures is different than a beamforming pattern formed by ...

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Номер записи: 32

02-02-2017 дата публикации

SIGNAL PROCESSING SYSTEM AND METHOD, BASE STATION AND USER EQUIPMENT

Номер: US20170033832A1

Автор: Dang Jian, SHI YU, Wei Chao, Zhang Zaichen

Принадлежит: SONY CORPORATION

The present disclosure provides a signal processing system and method for a non-orthogonal multiple access communication system, a base station and a user equipment. The signal processing system is configured to perform interleaving processing on information to be transmitted subjected to modulation processing. The signal processing system can obtain at least one of the following beneficial effects: capable of saving length of an interleaver; and capable of obtaining more diversity gain. 1. A signal processing system for a non-orthogonal multiple access communication system , the signal processing system being configured to perform interleaving processing on information to be transmitted which has been subjected to modulation processing.2. The signal processing system according to claim 1 , comprising:a symbol mapping device for performing modulation processing on the information to be transmitted; andan interleaver for performing interleaving processing on the information to be transmitted which has been subjected to modulation processing, to save a length of the interleaver.3. The signal processing system according to claim 2 , further comprising: a spreader for spreading the information to be transmitted which has been processed by the symbol mapping device claim 2 , and transmitting the spread information to be transmitted to the interleaver for interleaving processing claim 2 , so as to save the length of the interleaver.4. The signal processing system according to claim 2 , further comprising: a spreader for spreading the information to be transmitted claim 2 , and transmitting the information to be transmitted which has been spread to the symbol mapping device claim 2 , wherein the symbol mapping device performs modulation processing on the information to be transmitted which has been spread claim 2 , and transmits the information to be transmitted which has been subjected to the modulation processing to the interleaver for interleaving processing claim 2 , ...

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Номер записи: 33

04-02-2016 дата публикации

AAS DIRECT SIGNALING FRAMING METHODOLOGIES TO SUPPORT HIGH CAPACITY WIRELESS LINKS

Номер: US20160036610A1

Автор: Branlund Dale A., Bromberg Matthew C.

Принадлежит:

A new frame structure applicable to the IEEE 802.16 OFDMA wireless waveform is described, for the purposes of increasing base station capacity, increasing subscriber link rates and extending base station range. The frame structure provides the necessary constructs so that advance signal processing technologies such as Stacked Carrier Spread Spectrum and adaptive antenna technology may be used in combination with these constructs in order to realize these gains. These concepts are equally applicable in other advanced wireless waveforms based on OFDM or OFDMA such as LTE or UMB. 1 a plurality of access subchannels, wherein each access subchannel is paired with a nonadjacent access subchannel, and wherein each access subchannel contains at least one data burst region;', 'a predefined number of orthogonal frequency-division multiple access (OFDMA) symbols containing training preambles for an adaptive antenna system (AAS) and distributed across all access subchannels that demarcate a selected AAS zone; and', 'a plurality of payload subchannels, wherein each payload subchannel is paired with a non-adjacent payload subchannel, wherein each payload subchannel contains at least one data burst region, and wherein each payload subchannel comprises one or two adaptive modulation and coding (AMC) bins of OFDM symbols;, 'constructing one or more subframes, each subframe includinggenerating a plurality of spatial planes using a combination of stacked carrier spread spectrum, code nulling, and array processing; andtransporting data in the one or more subframes on plurality of spatial planes.. A method of grouping orthogonal frequency-division multiple access (OFDMA) symbols, and subgroups of OFDMA subcarriers/subchannels therein, to enable stacked carrier spread spectrum (SCSS) and SCSS adaptive array processing, the method being performed in an adaptive antenna system, the method comprising: This application is a continuation of U.S. patent application Ser. No. 14/041,192 filed ...

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Номер записи: 34

11-02-2016 дата публикации

Systems and methods for focusing beams with mode division multiplexing

Номер: US20160043794A1

Автор: Nima Ashrafi, Roger Linquist, Solyman Ashrafi

Принадлежит: NxGen Partners IP LLC

A system for focusing a multiplexed beam includes OAM signal processing circuitry for generating a multiplexed OAM multiplexed signal. A plurality of antennas comprises an antenna array. An antenna array control circuit controls transmission of the multiplexed OAM signal from each of the plurality of antennas in the antenna array. The antenna array control circuit generates control signals to cause the antenna array to transmit the OAM multiplexed signal from each of the plurality of antennas of the antenna array toward a focus point as a transmission beam and controls a timing of the transmissions of the OAM multiplexed signal from each of the plurality of antennas of the antenna array to cause the transmitted OAM multiplexed signals to arrive at the focus point at substantially a same time.

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Номер записи: 35

11-02-2016 дата публикации

Transmission of Feedback Information for Multi-Carrier Operation

Номер: US20160043820A1

Автор: Damnjanovic Jelena, Montojo Juan, Zhang Xiaoxia

Принадлежит:

Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information may be sent on an uplink carrier that may or may not be paired with a downlink carrier on which data transmission is sent. A user equipment (UE) may receive data transmission on a downlink carrier among a plurality of downlink carriers. The UE may determine feedback information for the data transmission, determine an uplink carrier to use to send the feedback information from among a plurality of uplink carriers, and send the feedback information on the uplink carrier. In another aspect, feedback information for multiple downlink carriers may be sent on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA). A UE may receive data transmissions on a plurality of downlink carriers, determine feedback information for the data transmissions, and send the feedback information on at least one uplink carrier using SC-FDMA. 1. A method for wireless communication , comprising:receiving data transmissions on a plurality of downlink carriers;determining feedback information for the data transmissions; andsending the feedback information on at least one uplink carrier using Single-Carrier Frequency Division Multiple Access (SC-FDMA).2. The method of claim 1 , wherein the feedback information comprises acknowledgement (ACK) information claim 1 , or channel quality indicator (CQI) information claim 1 , or both.3. The method of claim 1 , wherein the sending the feedback information comprises sending the feedback information in a plurality of frequency regions of the at least one uplink carrier claim 1 , one frequency region for each downlink carrier.4. The method of claim 3 , further comprising:receiving signaling identifying at least one frequency offset for the plurality of frequency regions.5. The method of claim 1 , wherein the sending the feedback information comprises sending the feedback information in a single ...

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Номер записи: 36

12-02-2015 дата публикации

Architecture, devices and methods for supporting multiple channels in a wireless system

Номер: US20150045047A1

Автор: Dan Picker

Принадлежит: Redline Communications Inc

Devices, systems, and methods are presented for a wireless base station to assign dynamically a plurality of radio transceiver chains among a varying number of wireless channels. In this manner, the communication system including the wireless base station may transition between a range extension mode and an enhanced capacity mode. In the range extension mode, a system is configured for maximum communication range with Subscriber Stations that are relatively distant from the radio transceiver chains, although communication is still possible with nearby Subscriber Stations. In the enhanced capacity mode, the system is configured for maximum communication throughput with Subscriber Stations that are relatively near to the radio transceiver chains, whereas communication with relatively distant Subscriber Stations will be either terminated or at least non-optimized.

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Номер записи: 37

18-02-2016 дата публикации

Systems and Methods for Parallel Signal Cancellation

Номер: US20160049974A1

Автор: Anand P. Narayan, Eric S. Olson, John K. Thomas

Принадлежит: III Holdings 1 LLC

A receiver includes a first finger that receives a non-interference-cancelled signal and output first demodulated data, a first phase estimate, and a first PN code. The receiver also includes a second finger that selectively receives the non-interference-cancelled signal and a first interference-cancelled signal generated from the non-interference-cancelled signal based on the first phase estimate and the first PN code. The second finger also outputs second demodulated data.

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Номер записи: 38

22-02-2018 дата публикации

Transmission method, transmitter, and receiver for multi antenna wireless communication system

Номер: US20180054243A1

Автор: Koji Akita, Ren Sakata

Принадлежит: Toshiba Corp

A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.

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Номер записи: 39

25-02-2021 дата публикации

UE-RS-BASED OPEN-LOOP AND SEMI-OPEN-LOOP MIMO

Номер: US20210058120A1

Автор: Chen Wanshi, Gaal Peter, Hou Jilei, Liu Xiaohui, Wang Neng, Wei Chao, Xu Hao

Принадлежит:

Design of precoding and feedback for user equipment (UE)-specific reference signals (UE-RS)-based open-loop and semi-open-loop multiple input, multiple output (MIMO) systems is discussed. Aspects of the present disclosure provide for sub-resource block (RB) random precoding that allows for greater diversity gain in a lower bandwidth. In addition, the recoding may be performed using resource element (RE)-level layer shifting that provides for a number of precoders to be assigned to a number of layers for every such continuous subcarrier. As such, two codewords may experience the same effective channel quality with channel quality indicators (CQI) being averaged across all of the layers. 1. A method of wireless communication , comprising:measuring a reference signal received from a base station;determining a set of wideband and subband precoders associated with a configured antenna array;transmitting a precoding matrix indicator (PMI), wherein the PMI is associated with a wideband precoding matrix selected from a set of predetermined wideband precoders; andtransmitting a channel quality indicator (CQI) generated based on the measured reference signal, wherein the channel quality indicator is generated according to an assumption that precoder elements are cycled from a set of predetermined subband precoders.2. The method of claim 1 ,wherein the CQI includes a single CQI when a rank indicator is >1.3. The method of claim 1 , wherein the PMI is not reported when a rank indicator is >4 claim 1 , wherein the CQI is generated according to an assumption that precoder elements are cycled from a set of predetermined wideband precoders.4. The method of claim 1 , further including transmitting a rank indicator claim 1 , wherein the rank indicator corresponds to one of:a mode of transmit diversity or spatial multiplexing for data transmission; ora number of useful layers in a transmission channel.5. The method of claim 1 , further including:receiving from the base station ...

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Номер записи: 40

15-05-2014 дата публикации

Method and apparatus for transmitting control information

Номер: US20140133373A1

Автор: Hyeyoung Choi, Hyukmin SON, Hyunwoo Lee, Jinmin Kim, SEUNGHEE HAN

Принадлежит: LG ELECTRONICS INC

The present invention relates to a wireless communication system. In particular, the present invention relates to a method and an apparatus for transmitting uplink control information, including the steps of: generating a plurality of HRAQ-ACKs (Hybrid ARQ Acknowledgements), selecting one or more PUCCH (Physical Uplink Control Channel) resource indexes corresponding to the HARQ-ACKs from a plurality of PUCCH resource indexes, and transmitting one or more modulation symbols corresponding to the plurality of HARQ-ACKs using resources corresponding to the one or more PUCCH resource indexes, in which, when a number of the plurality of HARQ-ACKs is two, the one or more modulation symbols are transmitted only in a first multiple antenna transmission manner, and when a number of the plurality of HARQ-ACKs is three or more, the one or more modulation symbols are transmitted in any one of a plurality of second multiple antenna transmission manners.

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Номер записи: 41

21-02-2019 дата публикации

Transmission Of Information In A Wireless Communication System

Номер: US20190059080A1

Автор: Cai Zhijun, Earnshaw Andrew Mark, Fong Mo-Han, Harrison Robert Mark, Heo Youn Hyoung, McBeath Sean Michael, Xu Hua

Принадлежит: BlackBerry Limited

Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna. 130-. (canceled)31. A method at a network element in a wireless communication system , comprising: transmitting , to a user equipment , a downlink message using orthogonal frequency division multiplexing (OFDM) symbols , wherein the downlink message comprises a first control channel element , and ,wherein, a location of the first control channel element is associated with a first index, and,wherein, a second index is associated with the first index, and,wherein, an indicator of a first orthogonal resource is associated with the first index, and an indicator of a second orthogonal resource is associated with the second index;receiving an uplink transmission from the user equipment;despreading the received uplink transmission into a first modulated message using the first orthogonal resource, and, despreading the received uplink transmission into a second modulated message using the second orthogonal resource.32. The method of claim 31 , wherein the downlink message comprises a second control channel element claim 31 , the second control channel element being associated to the second orthogonal resource ...

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Номер записи: 42

12-03-2015 дата публикации

Method for transmitting a data signal in a mimo system

Номер: US20150071377A1

Автор: Christian Drewes, Markus Mueck, WEN Xu

Принадлежит: Intel Mobile Communications GmbH

A method operates to transmit a data signal by a transmission unit of a wireless multiple-input/multiple-output (MIMO) communication system. The communication system includes the transmission unit and a reception unit, the transmission unit having a plurality of transmission antennas and the reception unit having a plurality of reception antennas. The method includes performing a first transmission of a data signal, the first transmission including transmitting the data signal by each one of the plurality of transmission antennas, and performing a second transmission of the data signal at a time later than the first transmission, the second transmission including transmitting at least one spectrally modified signal variant of the data signal by at least one antenna of the plurality of transmission antennas.

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Номер записи: 43

10-03-2016 дата публикации

Method and System for Controlling a Communications Carrier's Power Spectral Density (PSD) Using Spread Spectrum for Matched Spectral Allocation

Номер: US20160073359A1

Автор: Beeler Michael, Davis Wallace, Mamaril Cris M.

Принадлежит:

A method of reducing adjacent satellite interference, the method comprising monitoring, by a processor, a power spectral density (PSD) of a signal transmitted by a remote transmitter, determining, by the processor, that the PSD of the signal transmitted by the remote transmitter is above a predetermined level, and reducing the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a power level, a modulation factor, and a forward error correction (FEC) rate using a modulator while maintaining a constant spectral allocation and center frequency of the signal. 1. A method of reducing adjacent satellite interference , the method comprising:monitoring, by a processor, a power spectral density (PSD) of a signal transmitted by a remote transmitter;determining, by the processor, that the PSD of the signal transmitted by the remote transmitter is above a predetermined level; andreducing the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a power level, a modulation factor, and a forward error correction (FEC) rate using a modulator while maintaining a constant spectral allocation and center frequency of the signal.2. The method of claim 1 , further comprising maintaining a communications link between the remote transmitter and a remote receiver while reducing the PSD of the signal.3. The method of claim 2 , further comprising applying one or more predetermined timing parameters by the modulator when more than one of the spread spectrum spreading factor claim 2 , the power level claim 2 , the modulation factor claim 2 , and the forward error correction (FEC) rate are adjusted.4. The method of claim 1 , further comprising interrupting a communications link between the remote transmitter and a remote receiver while reducing the PSD of the signal.5. The method of claim 1 , wherein the PSD of the signal is reduced by adjusting only the ...

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Номер записи: 44

09-03-2017 дата публикации

Method and Apparatus for Measuring and Feeding Back Channel Information

Номер: US20170070272A1

Автор: Liu Jianghua, LIU Kunpeng, ZHANG Leiming

Принадлежит:

A method for measuring and feeding back channel information and a corresponding apparatus are provided. A first network device receives a reference signal, measures the reference signal to obtain a measurement result, and selects a first codebook from a first codebook set according to the measurement result; for different sub-vectors W(1) and W(2), a location of a non-zero vector in the W(1) is the same as a location of a non-zero vector in the W(2); and formation according to different structures is: for different sub-vectors W(1) and W(2), a location of a non-zero vector in the W(1) is different from a location of a non-zero vector in the W(2); and the first network device sends a codebook index to a second network device, where the codebook index corresponds to the first codebook selected from the first codebook set. 1. A method for measuring and feeding back channel information , comprising:receiving, by a first network device, a reference signal, measuring the reference signal to obtain a measurement result, and selecting a first codebook from a first codebook set according to the measurement result; wherein{'sub': x', 'x', 'x', 'x', 'x', 'x', 'x', 'x', 'x', 'x', 'x, 'the first codebook set comprises at least two first codebooks, a sub-vector Wof each first codebook is formed by a zero vector and a non-zero vector, and the vectors forming the Wcorrespond to different groups of antenna ports; in each first codebook, different sub-vectors Ware formed according to a same structure or different structures; formation according to the same structure is: for different sub-vectors W(1) and W(2), a location of a non-zero vector in the W(1) is the same as a location of a non-zero vector in the W(2); and formation according to different structures is: for different sub-vectors W(1) and W(2), a location of a non-zero vector in the W(1) is different from a location of a non-zero vector in the W(2); and'}sending a codebook index to a second network device, wherein the ...

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Номер записи: 45

18-03-2021 дата публикации

Multi-User MIMO Systems and Methods

Номер: US20210084665A1

Автор: Jia Ming, Tong Wen, WU Jianming, Yu Dong-Sheng, ZHU PEIYING

Принадлежит:

A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI. 1. A method comprising:transmitting a composite metric specifying a channel quality indicator (CQI) of a multiple-input multiple-output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) channel and a MIMO-OFDM mode indication to a receiver of the composite metric;transmitting an indication of a MIMO-OFDM capability, the MIMO-OFDM capability indicating a number of antennas on a user terminal from which the composite metric is transmitted; andreceiving data transmitted from a base station to the user terminal, at least one of a modulation and coding of the data or a MIMO-OFDM mode of the data being based on the composite metric, wherein the composite metric comprises at least a first bit specifying the CQI and at least a second bit specifying the MIMO-OFDM mode.2. The method of claim 1 , wherein the composite metric is transmitted using a MIMO-OFDM transmission.3. The method of claim 1 , further comprising receiving pilot signals corresponding to each of a plurality of antennas using a respective set of OFDM sub-carriers and OFDM symbol durations for each antenna.4. A user terminal comprising:a transmitter configured to transmit a composite metric specifying a channel quality ...

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Номер записи: 46

19-06-2014 дата публикации

Methods and Systems for Combined Cyclic Delay Diversity and Precoding of Radio Signals

Номер: US20140169498A1

Автор: Göransson Bo, Jöngren George

Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

In a transmitter or transceiver, signals can be precoded by multiplying symbol vectors with various matrices. For example, symbol vectors can be multiplied with a first column subset of unitary matrix which spreads symbols in the symbol vectors across virtual transmit antennas, a second diagonal matrix which changes a phase of the virtual transmit antennas, and a third precoding matrix which distributes the transmission across the transmit antennas. 1. A method for transmitting information signals having a plurality of symbol vectors associated therewith on a radio channel comprising: a first column subset of a unitary matrix which spreads symbols in said symbol vectors across all virtual transmit antennas,', 'a second diagonal matrix which changes a phase of said virtual transmit antennas, and', 'a third precoding matrix which distributes transmit energy across physical transmit antennas,, 'precoding said symbol vectors by multiplying said symbol vectors withfurther processing said precoded symbol vectors to generate said information signals, andtransmitting said information signals.2. The method according to claim 1 , wherein said physical transmit antennas are antenna ports.3. The method according to claim 1 , wherein said symbol vectors are first multiplied by said first column subset of unitary matrix claim 1 , next multiplied by said second diagonal matrix and then multiplied by said third precoding matrix.4. The method according to claim 1 , wherein when transmitting using r layers claim 1 , said third precoding matrix has l columns claim 1 , said second diagonal matrix has l rows and l columns claim 1 , said first column subset of unitary matrix has l rows and r columns claim 1 , and said symbol vectors have r elements.5. The method according to claim 1 , wherein when transmitting using r layers claim 1 , said third precoding matrix has r columns claim 1 , said second diagonal matrix has r rows and r columns claim 1 , said first column subset of unitary ...

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Номер записи: 47

21-03-2019 дата публикации

UE-RS-BASED OPEN-LOOP AND SEMI-OPEN-LOOP MIMO

Номер: US20190089429A1

Автор: Chen Wanshi, Gaal Peter, Hou Jilei, Liu Xiaohui, Wang Neng, Wei Chao, Xu Hao

Принадлежит:

Design of precoding and feedback for user equipment (UE)-specific reference signals (UE-RS)-based open-loop and semi-open-loop multiple input, multiple output (MIMO) systems is discussed. Aspects of the present disclosure provide for sub-resource block (RB) random precoding that allows for greater diversity gain in a lower bandwidth. In addition, the recoding may be performed using resource element (RE)-level layer shifting that provides for a number of precoders to be assigned to a number of layers for every such continuous subcarrier. As such, two codewords may experience the same effective channel quality with channel quality indicators (CQI) being averaged across all of the layers. 1. A method of wireless communication , comprising:selecting a first precoder associated with a first transmission block, wherein the first transmission block includes one of: a first resource block, a first set of bundled resource blocks, or a first sub-resource block selected as a group of contiguous resource elements within a resource block;transmitting user equipment (UE)-specific reference signals (UE-RS) and data within the first transmission block, wherein the UE-RS and data are precoded using the first precoder;selecting a next precoder associated with a next transmission block, wherein the next transmission block includes one of: a next resource block, a next set of bundled resource blocks, or a next sub-resource block selected as a next group of contiguous resource elements within the resource block; andtransmitting the UE-RS and data in the next transmission block, wherein the UE-RS and data are precoded with a next precoder.2. The method of claim 1 , wherein the first precoder and the next precoder are based on a product of a wideband precoding matrix and a subband precoding matrix claim 1 , wherein the subband precoding matrix is cyclically selected from a set of predetermined precoding matrices.3. The method of claim 2 , wherein the wideband precoding matrix is one of: ...

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Номер записи: 48

12-05-2022 дата публикации

Method of two-layer uplink transmission with cyclic delay diversity

Номер: US20220149906A1

Автор: Haralabos Papadopoulos, Nadisanka Rupasinghe

Принадлежит: NTT DOCOMO INC

A method of applying rank two transmission from a plurality of sets of coherent antennas of a user equipment (UE) in a wireless communication system includes: transmitting two information streams using a first set from the plurality of sets of coherent antennas of the UE; and transmitting the two information streams using a second set from the plurality of sets of the coherent antennas of the UE. The first set and the second set are incoherent with respect to each other. The two information streams are common to the first set and the second set.

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Номер записи: 49

26-03-2020 дата публикации

SOUNDING REFERENCE SIGNAL CONFIGURATIONS TO SUPPORT UPLINK TRANSMISSIONS WITH CYCLIC DELAY DIVERSITY

Номер: US20200099490A1

Автор: Gaal Peter, Huang Yi, Sridharan Gokul, Sundararajan Jay Kumar, Wang Xiao Feng, Yang Wei

Принадлежит:

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a sounding reference signal (SRS) resource set to be used to signal a virtual port used for a physical uplink shared channel (PUSCH) communication, wherein the virtual port is a combination of at least two non-coherent or partially-coherent antenna ports of the UE using precoding and cyclic delay diversity; and transmit an SRS for the at least two non-coherent or partially-coherent antenna ports using one or more resources of the SRS resource set. Numerous other aspects are provided. 1. A method of wireless communication performed by a user equipment (UE) , comprising:receiving an indication of a sounding reference signal (SRS) resource set to be used to signal a virtual port used for a physical uplink shared channel (PUSCH) communication, wherein the virtual port is a combination of at least two non-coherent or partially-coherent antenna ports of the UE using precoding and cyclic delay diversity; andtransmitting an SRS for the at least two non-coherent or partially-coherent antenna ports using one or more resources of the SRS resource set.2. The method of claim 1 , wherein the SRS resource set does not overlap in time with another indicated SRS resource set having a different use than the SRS resource set.3. The method of claim 1 , wherein the SRS resource set does not overlap in time with an antenna switching SRS resource set used to indicate downlink channel state information with reciprocity between an uplink and downlink channel.4. The method of claim 1 , wherein the SRS is transmitted on the virtual port using precoding and cyclic delay diversity.5. The method of claim 1 , wherein the SRS resource set partially or fully overlaps in time with another indicated SRS resource set having a different use than the SRS resource set.6. The method of claim 1 , wherein the SRS resource set partially or fully overlaps in ...

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Номер записи: 50

21-04-2016 дата публикации

Methods and systems for combined cyclic delay diversity and precoding of radio signals

Номер: US20160112104A1

Автор: Bo Göransson, George JÖNGREN

Принадлежит: Telefonaktiebolaget LM Ericsson AB

In a transmitter or transceiver, signals can be precoded by multiplying symbol vectors with various matrices. For example, symbol vectors can be multiplied with a first column subset of unitary matrix which spreads symbols in the symbol vectors across virtual transmit antennas, a second diagonal matrix which changes a phase of the virtual transmit antennas, and a third precoding matrix which distributes the transmission across the transmit antennas.

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Номер записи: 51

30-04-2015 дата публикации

Method and Apparatus for Coordinating a Cell on a Plurality of Resource Blocks

Номер: US20150117394A1

Автор: Jiang Huiling, Liu Liu, Takeda Kazuaki, Wang Jing

Принадлежит: NTT DOCOMO, INC.

A method and an apparatus for coordinating a cell on a plurality of resource blocks, and a method for selecting, by a central control device, a mode for coordinating a cell on a plurality of resource blocks in a communication system including a base station and the central control device are disclosed. The method for coordinating a cell comprises: determining whether the cell needs to be muted on at least one resource block; determining a ratio of the resource block on which the cell is muted to the plurality of resource blocks, in a case where the cell needs to be muted on the at least one resource block; and determining, based on the ratio, the resource block on which the cell is muted among the plurality of resource blocks, the resource block being a time resource block, a frequency resource block or a time-frequency resource block. 1. A method for coordinating a cell on a plurality of resource blocks , the cell forming a cluster with at least one other cell , the method comprising:determining whether the cell needs to be muted on at least one resource block;determining a ratio of the resource block on which the cell is muted to the plurality of resource blocks, in a case where the cell needs to be muted on the at least one resource block; anddetermining, based on the ratio, the resource block on which the cell is muted among the plurality of resource blocks, the resource block being a time resource block, a frequency resource block or a time-frequency resource block.2. The method of claim 1 , wherein the determining whether the cell needs to be muted on at least one resource block includes:determining whether the cell needs to be muted on at least one resource block, according to whether interference from the cell to a user of the other cell in the cluster exceeds a predetermined level.3. The method of claim 1 , wherein the determining whether the cell needs to be muted on at least one resource block includes:determining whether the cell needs to be muted on the ...

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Номер записи: 52

20-04-2017 дата публикации

Channel quality measurement method in multiple antenna wireless communication system and device for same

Номер: US20170111098A1

Автор: Bonghoe Kim, Hanjun PARK, Jonghyun Park, Kijun KIM, Kunil YUM, Youngtae Kim

Принадлежит: LG ELECTRONICS INC

The present invention relates to a method and device for measuring channel quality by a base station having a two-dimensional active antenna system including multiple antennas. Particularly, the method comprises: receiving channel state information (CSI) generated on the basis of a first reference signal relating to a part of multiple antennas, from a terminal; selecting a precoding and a rank based on a precoding matrix indicator (PMI) and a rank indicator (RI) of the received CSI; generating a port by applying the selected precoding and the selected rank; through the generated port, transmitting, to the terminal, a physical downlink shared channel (PDSCH) and a demodulation-reference signal (DM-RS) configured for the terminal; and receiving, from the terminal, a channel quality indication (CQI) feedback for reducing a mismatch for the CQI of the CSI, wherein the CQI feedback may be generated based on the DM-RS.

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Номер записи: 53

02-04-2020 дата публикации

Decoding data in new radio ultra-reliable low latency communications with multiple transmission points

Номер: US20200106486A1

Автор: Arunabha Ghosh, Sairamesh Nammi

Принадлежит: AT&T INTELLECTUAL PROPERTY I LP

Described is a technology to reduce the interference between two or more transmit receive (Tx/Rx) points (TRPs) and improve the reliability for New Radio ultra reliable low latency communication (NR URLLC) applications. The technology operates in one aspect at a network node, and in another aspect at a user equipment. If a network device decides to use packet duplication, the network device can indicate duplication to the user equipment. The network device can send duplicate copies, e.g., via two different antenna panels, or can send one copy and coordinate with another network device (e.g., another cell) to send the other copy. When the user equipment receives the copies, the user equipment combines the data, e.g., via soft combining or concatenation into combined data, and decodes the combined data. Weights, such as corresponding to channel quality from each transmit source, can be used as factors in the combining of the data.

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Номер записи: 54

02-04-2020 дата публикации

FACILITATION OF BEAM MANAGEMENT FOR 5G OR OTHER NEXT GENERATION NETWORK

Номер: US20200106512A1

Автор: Akoum Salam, Wang Xiaoyi

Принадлежит:

A test transmission can be used to train and/or select a signal. For example, a cellular network can configure a receiver with a recommended receiver signal sweeping pattern for mobile devices. A transmitter device can duplicate a data packet transmission and send it to a receiver device to ensure that the receiver can receive the duplicated packets from different signals. Consequently, the duplicated data packet can be indicated in the associated control channel so that the receiver is aware that the data packet is a duplicated transmission, and based on this info and configuration data, the receiver can select a more favorable signal. 1. A method , comprising:receiving, by a wireless network device comprising a processor, configuration data representative of a configuration for reception of patterns of signals;based on the configuration data, receiving, by the wireless network device from a signal transmission device, a duplicate data packet associated with a data packet to be sent to a mobile device; andin response to the receiving the duplicate data packet, selecting, by the wireless network device, a beam to be used based on the configuration data.2. The method of claim 1 , wherein the duplicate data packet is duplicative of the data packet to be sent to the mobile device.3. The method of claim 2 , further comprising:receiving, by the wireless network device, an indication of a number of times the duplicate data packet is to be received.4. The method of claim 1 , further comprising:in response to receiving the signals, determining, by the wireless network device, a signal priority associated with a signal of the signals.5. The method of claim 4 , further comprising:in response to the determining the signal priority, utilizing, by the wireless network device, the signal for a remainder of a communication session.6. The method of claim 1 , further comprising:in response to receiving the signals, comparing, by the wireless network device, a first signal of the ...

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Номер записи: 55

26-04-2018 дата публикации

Method and Systems using Quasi-Synchronous Distributed CDD Systems

Номер: US20180115359A1

Автор: Kim Kyeong Jin, Orlik Philip

Принадлежит: Mitsubishi Electric Research Laboratories, Inc.

Systems and methods for a communication system including a set of transmitters, wherein operations of the set of transmitters are synchronized with an accuracy bound by a synchronization error. A controller communicatively connected to each transmitter in the set of transmitters, wherein the controller is configured to: determine a tap delay for a communication channel between a receiver and each transmitter in the set of transmitters to produce a set of tap delays. Determine a minimal length of a cyclic prefix as a function of a sum of the synchronization error and a maximal tap delay in the set of tap delays. Finally, controls at least some transmitters in the set of transmitters to transmit a message to the receiver using a cyclic delay diversity (CDD) with the cyclic prefix having at least the minimal length. 1. A communication system , comprising:a cyclic delay diversity (CDD) having a set of spatially distributed cooperating transmitters to transmit a message, wherein operations of the set of transmitters are synchronized with an accuracy bound by a synchronization error; and determine a tap delay for a communication channel between a receiver and each transmitter in the set of transmitters to produce a set of tap delays;', 'determine a minimal length of a cyclic prefix as a function of a sum of the synchronization error and a maximal tap delay in the set of tap delays; and', 'control at least some transmitters in the set of transmitters to transmit the message to the receiver using the CDD with the cyclic prefix having at least the minimal length., 'a controller communicatively connected to each transmitter in the set of transmitters, wherein the controller is configured to2. The communication system of claim 1 , wherein the set of transmitters synchronize the operations by operating on a universal clock at the controller using signals from a global navigation satellite system (GNSS).3. The communication system of claim 1 , wherein the transmitters ...

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Номер записи: 56

07-05-2015 дата публикации

METHOD AND SYSTEM FOR CALIBRATING A TRANSCEIVER ARRAY

Номер: US20150124634A1

Автор: CHEN Phil F., Harel Haim, Kludt Kenneth, Rivingston Thorp

Принадлежит:

A system and method for compensating phase differences between multiple local oscillators and group delay differences between multiple transceivers. The system may include; an antenna array; a plurality of transceivers connected to said antennas and operatively associated each with a local oscillator (LO), wherein at least some of the transceivers do not share a common LO, and wherein at least some of the LOs are using a common reference oscillator; a common digital beamformer circuit connected to the transceivers; a baseband processor configured to operate the system at a specified communication scheme; and a calibration circuit and software modules configured to eliminate or reduce mismatches and phase deviations between the different transceivers, wherein the calibration circuit and software modules are incorporated in system such that the elimination or reduction of mismatches and phase deviations is non-interrupting with a continuous operation of the system at the specified communication scheme. 1. A system comprising:an antenna array comprising antennas;a plurality of transceivers connected to said antennas and each transceiver operatively associated with a local oscillator (LO), wherein at least some of the transceivers are not associated with the same LO, and wherein at least some of the LOs use a common reference oscillator;a common digital beamformer circuit connected to said transceivers;a baseband processor configured to operate the transceivers and beamformer circuit at a specified communication scheme; anda calibration circuit,wherein said calibration circuit and said baseband processor executing software modules are configured to reduce mismatches and phase deviations between the transceivers in a non-interrupting manner with a continuous operation of the system at the specified communication scheme.2. The system according to claim 1 , wherein said calibration circuit and said baseband processor executing software are configured to enable the common ...

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Номер записи: 57

09-06-2022 дата публикации

Multi-User MIMO Systems and Methods

Номер: US20220183019A1

Автор: Jia Ming, Tong Wen, WU Jianming, Yu Dong-Sheng, ZHU PEIYING

Принадлежит:

A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI. 1. A method at a user terminal comprising:transmitting a composite metric specifying a channel quality indicator (CQI) of a multiple-input multiple-output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) channel and a MIMO-OFDM mode indication to a base station; andtransmitting an indication of a MIMO-OFDM capability, the MIMO-OFDM capability indicating a number of antennas on the user terminal from which the composite metric is transmitted.2. The method of claim 1 , wherein the composite metric is transmitted using a MIMO-OFDM transmission.3. The method of claim 1 , further comprising receiving pilot signals corresponding to each of a plurality of antennas using a respective set of OFDM sub-carriers and OFDM symbol durations for each antenna.4. The method of claim 1 , further comprising receiving data transmitted from the base station to the user terminal claim 1 , a modulation and coding of the data being based on the composite metric.5. The method of claim 1 , further wherein the MIMO capability indicates a rank of the MIMO channel.6. A user terminal comprising:a transmitter configured to:transmit a composite metric specifying a channel quality indicator (CQI) of a multiple- ...

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Номер записи: 58

05-05-2016 дата публикации

LOW-RATE DATA TRANSMISSION IN LTE BASED SATELLITE RATIO INTERFACE

Номер: US20160127032A1

Автор: KIM Hee Wook

Принадлежит:

Disclosed is a low-rate data transmission method in an LTE based satellite radio interface, which can secure a large number of low-rate data channels which can simultaneously access and increase frequency efficiency while providing compatibility with the existing LTE radio interface through a transmission technique which can secure more link margins in communication between portable terminals (handheld type terminals) without changing a basic LTE transmission frame structure in a satellite system requiring high transmission power. 1. A low-rate data transmission method in a radio interface , the method comprising:allocating transmission data to resource elements of a basic transport block to which a spreading code is applied, to be shared by a plurality of target UEs; andtransmitting data based on the spreading code through the basic transport block for signal transmission,wherein the plurality of target UEs share the same basic transport block to transmit data by using the corresponding spreading code.2. The method of claim 1 , wherein in communication of portable terminals for LTE based satellite communication claim 1 , the spreading code is applied to the basic transport block while maintaining compatibility with the existing radio interface and a link margin is improved by sharing the basic transport block to support the low-rate data transmission.3. The method of claim 1 , wherein the spreading code corresponding to the transport block size which decreases as compared with the existing LTE is applied to the plurality of target UEs allocated to the basic transport block and each transmission data spreads to allow transmission target UEs of the number corresponding to a maximum length of the spreading code to transmit data through the same basic transport block.4. The method of claim 1 , wherein the basic transport block includes a resource constituted by 12 subcarriers having a size of 15 kHz and one subframe having a size of 1 ms.5. The method of claim 1 , ...

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Номер записи: 59

14-05-2015 дата публикации

ANTENNA TIME OFFSET IN MULTIPLE-INPUT-MULTIPLE-OUTPUT AND COORDINATED MULTIPOINT TRANSMISSIONS

Номер: US20150131634A1

Автор: Gaal Peter, Geirhofer Stefan, Luo Tao

Принадлежит:

A method for wireless communication is provided which includes receiving first and second signals transmitted from first and second antennas, respectively, determining a time offset between the first and second antennas based on the first and second signals, and reporting information regarding the time offset, including information regarding the time offset as being above or below a predetermined threshold. Another method for wireless communication is provided which includes generating channel state information feedback based on an assumption that the time offset is being compensated at a transmitter side. Yet another method for wireless communication is provided which includes receiving information regarding a time offset between multiple transmit antennas, including information regarding the time offset as being above or below a predetermined threshold, and adapting downlink transmissions to account for the time offset. 1. A method of wireless communication , comprising:receiving downlink transmissions transmitted from first and second antennas;generating channel state information (CSI) feedback with respect to the downlink transmissions; andsending the CSI feedback to a base station;wherein the CSI feedback is conditioned based on whether or not a time offset between the first and second antennas is being compensated.2. The method of claim 1 , further including receiving information regarding an assumption of whether or not the base station is compensating for the time offset between the first and second antennas.3. The method of claim 2 , wherein the generating the CSI feedback is based on the assumption that the base station is compensating for the time offset by modifying a transmit time of a user equipment-specific reference signal (UE-RS).4. The method of claim 2 , wherein the generating the CSI feedback is based on the assumption that the base station is compensating for the time offset by applying precoder phase rotation.5. An apparatus for wireless ...

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Номер записи: 60

25-08-2022 дата публикации

COMMUNICATION DEVICES AND METHODS

Номер: US20220271800A1

Автор: CIOCHINA Dana, HANDTE Thomas

Принадлежит: Sony Group Corporation

The present disclosure presents an efficient backhaul operation that minimizes data rate requirements of the backhaul. Backhaul information is transmitted from a master AP to one or more slave APs for joint transmission from the one or more slave APs to an STA in coordination with a transmission from the master AP to the STA. 1. First communication device comprising: generate MAC output data units by performing media access control (MAC) layer processing of MAC input data units to be transmitted to a second communication device, and', 'generate control information for one or more selected MAC output data units, the control information indicating that the one or more selected MAC output data units are to be physical (PHY) layer processed by the third communication device and to be transmitted to the second communication device from the third communication device and from the first communication device; and', 'PHY layer circuitry configured to generate PHY output data units by performing PHY layer processing of the MAC output data units, wherein selected PHY output data units are generated from the selected MAC output data units for transmission to the second communication device from the first communication device in coordination with the transmission of selected PHY output data units generated by the third communication device from the selected MAC output data units,', 'wherein the first communication device is configured to provide the one or more selected MAC output data units and the associated control information to the third communication device., 'MAC layer circuitry configured to'}2. First communication device as claimed in claim 1 ,wherein the MAC layer circuitry is configured to select, for generating the selected MAC output data units, one or more MAC input data units based on one or more of a destination address of a MAC input data unit, the location of the second communication unit, channel state information between the first and second communication ...

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Номер записи: 61

25-04-2019 дата публикации

UPLINK TRANSMIT DIVERSITY AND PRECODING

Номер: US20190123950A1

Автор: Chen Wanshi, Huang Yi, Ji Tingfang, Jiang Jing, WANG Renqiu, Xu Hao, Zeng Wei

Принадлежит:

A configurable new radio (NR) uplink (UL) transmission may use transmit diversity. A user equipment (UE) may identify an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete Fourier transform spread orthogonal frequency division multiplexing. The UE may apply a precoding matrix to the at least one identified stream. The precoding matrix changes over time. The precoding matrix may change based on closed loop feedback, a precoding cycling pattern, and/or a code division multiplexing group. The UE may transmit the at least one identified stream from multiple antennas according to the applied precoding matrix. 1. A method of wireless communications , comprising:identifying, by a user equipment (UE) comprising at least two antennas, an uplink transmission of at least one stream as using one of cyclic prefix orthogonal frequency division multiplexing or discrete Fourier transform spread orthogonal frequency division multiplexing;applying, by the UE, a precoding matrix to the at least one identified stream, wherein the precoding matrix changes over time; andtransmitting, by the UE, the at least one identified stream from the at least two antennas according to the applied precoding matrix.2. The method of claim 1 , wherein applying the precoding matrix to the at least one identified stream comprises:applying the precoding matrix to a sounding reference signal (SRS), wherein the precoding matrix for the SRS follows a precoding cycling pattern.3. The method of claim 2 , wherein the precoding cycling pattern changes the precoding matrix on a symbol basis.4. The method of claim 2 , wherein the precoding cycling pattern changes the precoding matrix on a subframe basis.5. The method of claim 2 , further comprising receiving an indication from a base station indicating a preferred precoding matrix selected from the precoding cycling pattern.6. The method of claim 5 , wherein applying the precoding matrix to ...

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Номер записи: 62

16-04-2020 дата публикации

Methods and Systems for OFDM Using Code Division Multiplexing

Номер: US20200119827A1

Автор: Fong Mo-Han, Jia Ming, Ma Jianglei, Tong Wen, Xu Hua, Zhang Hang, ZHU PEIYING

Принадлежит:

In some embodiments of the invention, OFDM symbols are transmitted as a plurality of clusters. A cluster includes a plurality of OFDM sub-carriers in frequency, over a plurality of OFDM symbol durations in time. Each cluster includes data as well as pilot information as a reference signal for channel estimation. In some embodiments, a plurality of clusters collectively occupy the available sub-carrier set in the frequency domain that is used for transmission. In some embodiments of the invention data and/or pilots are spread within each cluster using code division multiplexing (CDM). In some embodiments pilots and data are separated by distributing data on a particular number of the plurality of OFDM symbol durations and pilots on a remainder of the OFDM symbol durations. CDM spreading can be performed in time and/or frequency directions. 1. A method for receiving downlink (DL) transmissions from a base station , the method comprising: receiving, in a time frequency resource including a plurality of OFDM symbols and a plurality of sub-carriers locations, first pilots for a plurality of antennas, wherein the first pilots are received in clusters of pilot locations, wherein the clusters of pilot locations are scattered within the time-frequency resource according to a pattern; and', 'receiving, in the time frequency resource, second pilots for the plurality of antennas, wherein for each respective antenna of the plurality of antennas, there is a respective set of first pilots and a respective set of second pilots, wherein for each antenna, the respective set of second pilots are received on a set of non-contiguous subcarrier locations., 'at a wireless device2. The method of claim 1 , wherein each sub-carrier location is adjacent to a sub-carrier location of another antenna of the plurality of antennas.3. The method of claim 1 , wherein each of the clusters of pilot locations spans two OFDM symbols.4. The method of claim 1 , wherein the plurality of antennas includes ...

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Номер записи: 63

01-09-2022 дата публикации

METHOD FOR QUASI-SYNCHRONOUS CODE DIVISION MULTIPLE ACCESS BASED ON SYNCHRONIZATION CLOCK BY PILOTING

Номер: US20220278744A1

Автор: DONG Mingke, HE Tao, JIN Ye, LIU Aimin, LV Guocheng, WANG Baoji

Принадлежит:

A method for quasi-synchronous code division multiple access based on synchronization clock by piloting can make CDMA operate in quasi-synchronous conditions, so it is suitable for open wireless channels with relay nodes, such as satellite communication systems, and open wireless channels without relay nodes. The method includes: adopting a mode of CDMA spread spectrum transmission to share power resources to transmit signals at multiple transmitting stations in open wireless channels; adopting an external pilot signal to provide synchronization clock for the CDMA signals transmitted by multiple terminal stations in the open wireless channels, eliminating path delay differences from the multiple terminal stations to a relay node or receiving station, and making multi-channel CDMA signals received at the relay node or receiving station clock synchronized and phase aligned. The method can realize the quasi-synchronous reception of multi-channel CDMA signals. 1. A method for quasi-synchronous code division multiple access (CDMA) based on a synchronization clock by piloting , comprising:adopting a mode of CDMA spread spectrum transmission to share power resources to transmit signals at multiple transmitting stations in open wireless channels;adopting an external pilot signal to provide the synchronization clock for CDMA signals transmitted by multiple terminal stations in the open wireless channels;eliminating path delay differences from the multiple terminal stations to a relay node or a receiving terminal station; andmaking multi-channel CDMA signals received at the relay node or the receiving terminal station realize a clock synchronization and a phase alignment, so as to realize a quasi-synchronous reception of the multi-channel CDMA signals.2. The method according to claim 1 , whereinthe external pilot signal comprises stable and continuous synchronization clock information and continuous reference timing information;the method further comprises receiving the ...

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Номер записи: 64

01-09-2022 дата публикации

Detecting the Number of Transmit Antennas in a Base Station

Номер: US20220279481A1

Автор: Callard Aaron, Ma Jianglei

Принадлежит:

Data is scrambled at a transmitter according to one of a number of predetermined scrambling sequences which are associated with a particular one of a number of predetermined transmit antenna diversity schemes (i.e., a specific number of transmit antenna ports). Received data is decoded using one or more of the known transmit antenna diversity schemes and the scrambled data is descrambled according to a corresponding descrambling sequence (related to the scrambling sequence). Based on the descrambled data, the receiver determines which transmit antenna diversity scheme (i.e., the number of antenna ports) is used by the transmitter. In one specific embodiment, CRC parity data is scrambled in the transmitter and the receiver descrambles the recovered CRC parity data according to a descrambling sequence, computes CRC parity data from the received data, and compares the descrambled CRC parity data to the newly computed CRC parity data. 1. A method comprising:selecting, by a communications device in a wireless communication network, a scrambling sequence from a plurality of scrambling sequences dependent upon a number of transmit antennas at a transmitter, wherein the scrambling sequence of (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0) indicates the number of transmit antennas is 1 and the scrambling sequence of (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) indicates the number of transmit antennas is 2; andscrambling, by the communications device, a plurality of bits of data using the selected scrambling sequence.2. The method of claim 1 , wherein the data comprises transport data and cyclic redundancy check (CRC) data claim 1 , wherein the CRC data is computed based on the transport data.3. The method of or claim 1 , further comprising transmitting claim 1 , by the communications device claim 1 , the plurality of scrambled bits to a remote communication device.4. The method of or claim 1 , further comprising transmitting claim 1 , by the communications device claim 1 , the plurality of ...

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Номер записи: 65

14-08-2014 дата публикации

Method of demodulating modulation signals

Номер: US20140226760A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Panasonic Corp

A method of generating modulation signals is disclosed including generally three steps. A plurality of modulation signals are generated, each of which is to be transmitted from a different one of a plurality of antennas in an identical frequency band, wherein each modulation signal includes a pilot symbol sequence including a plurality of pilot symbols used for demodulation. Each of the pilot symbol sequences is inserted at the same temporal point in each modulation signal, wherein the pilot symbol sequences are orthogonal to each other with zero mutual correlation among the plurality of modulation signals, each pilot symbol having a non-zero amplitude, the quantity of the plurality of pilot symbols in each sequence being greater than the quantity of the plurality of modulation signals to be transmitted. The plurality of modulation signals each including different transmission data and one of the pilot symbol sequences are output to the antennas.

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Номер записи: 66

10-06-2021 дата публикации

TRANSMISSION METHOD, TRANSMISSION DEVICE, RECEPTION METHOD, AND RECEPTION DEVICE

Номер: US20210175939A1

Автор: Kimura Tomohiro, MURAKAMI Yutaka, Ouchi Mikihiro

Принадлежит:

A transmission method includes generating a first precoded signal and a second precoded signal by performing a precoding process on a first baseband signal and a second baseband signal, outputting a third signal by inserting a pilot signal into the first precoded signal, outputting a fourth signal by applying a first phase change to the second precoded signal, outputting a fifth signal by inserting a pilot signal into the fourth signal, and outputting a sixth signal by applying a second phase change to the fifth signal. 1. (canceled)2. (canceled)3. A transmission apparatus comprising:a signal processing circuit that, in operation, generates control signals and data streams, the control signals being generated by performing a cyclic shift diversity scheme, the data streams being phase-rotated by first signal processing and phase-adjusted by second signal processing; anda transmitter that, in operation, transmits the control signals and the data streams through multiple antennas in a single carrier mode, whereinin the first signal processing, data symbols included in each of the data streams are phase-rotated using a phase rotation value that is defined per data symbol included in the data symbols, according to an order of the data symbols,in the second signal processing, the data symbols included in each of the data streams are phase-adjusted using a phase adjustment value that is defined per data stream included in the data streams, andthe control signals are generated from control data having a field indicating whether the data streams are modulated using the single carrier mode or not.4. A transmission method executed by a transmission apparatus , comprising:generating control signals and data streams, the control signals being generated by performing a cyclic shift diversity scheme, the data streams being phase-rotated by first signal processing and phase-adjusted by second signal processing; andtransmitting the control signals and the data streams through ...

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Номер записи: 67

15-09-2022 дата публикации

Transmission Path Identification Based On Propagation Channel Diversity

Номер: US20220294276A1

Автор: Moghaddam Ahmad, Zeine Hatem Ibrahim

Принадлежит: Ossia Inc.

Various embodiments of the present technology relate generally to wireless power systems. More specifically, some embodiments relate to the use of time reversal techniques utilizing time diversity (e.g., different multipath arrivals at the same antenna) to achieve coherency from the same transmission node. For example, instead of initiating outgoing transmissions (e.g., power signals) at the same time, various embodiments can initiate the outgoing signals from the various antennas in a staggered timing that is a reversal of the arrival times of an incoming signal. As a result of staggering the start of the outgoing signals, the signals will arrive at the destination at approximately the same time even though they have traveled different paths having different propagation delays. 1. A method comprising:receiving, at an array of antennas, a wireless signal from a client device;recording the wireless signal received at each antenna in the array of antennas; andgenerating a coherent transmission signal to be sent to the client device from the array of antennas, wherein the coherent transmission signal is created by transmitting the coherent transmission signal at each antenna in a reverse order of the wireless signal received at each of the array of antennas.2. The method of claim 1 , further comprising recording a magnitude of the wireless signal received at each antenna in the array of antennas claim 1 , and wherein generating the coherent transmission signal includes adjusting corresponding magnitudes of the coherent transmission signal in the array of antennas.3. The method of claim 1 , wherein the array of antennas is an adaptively-phase antenna array and the method further comprises identifying side echoes and estimating a full channel response by removing any identified side echoes.4. The method of claim 1 , wherein the wireless signal is a beacon signal and the coherent transmission signal is a response to the beacon signal.5. The method of claim 1 , further ...

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Номер записи: 68

31-05-2018 дата публикации

METHOD AND DEVICE FOR SELECTING MULTIPLE USERS AND ALLOCATING RESOURCES FOR NON-ORTHOGONAL MULTIPLE ACCESS IN WIRELESS COMMUNICATION SYSTEM

Номер: US20180152273A1

Автор: CHOI Kyungjun, Kang Jiwon, Kim Heejin, KIM Kwangsoon

Принадлежит:

The present application provides a method for allocating resources in a wireless communication system using multiple antennas. The method for allocating resources comprising: transmitting a reference signal to first-type terminals based on type information of a plurality of terminals; receiving channel estimation information from the first-type terminals that have received the reference signal; generating beams based on the received channel estimation information; and allocating resources for the generated beams. First-type beams for the first-type terminals are primarily generated and allocated, and on the basis of the generated first-type beams, second-type beams for second-type terminals may be non-orthogonally generated and allocated when the resources for the beams are allocated. 1. A method for allocating resources in a wireless communication system using multiple antennas , the method comprising:transmitting reference signals to first-type user equipments (UEs) based on type information on a plurality of UEs;receiving channel estimation information from the first-type UEs that receive the reference signals;generating beams based on the received channel estimation information; andallocating resources for the generated beams,wherein when the resources are allocated for the beams, first-type beams for the first-type UEs are first generated and allocated, and then second-type beams for second-type UEs are generated and allocated based on the generated first-type beams in a non-orthogonal manner.2. The method of claim 1 , wherein the first-type and second-type beams are allocated together in one resource region in a non-orthogonal manner.3. The method of claim 2 , wherein the one resource region is divided into a first space including Nc of the first-type beams and a second space including No of the second-type beams based on the multiple antennas.4. The method of claim 3 , wherein after generation of the first space claim 3 , the second space is generated based ...

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Номер записи: 69

11-06-2015 дата публикации

METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL

Номер: US20150162964A1

Автор: Chung Jae Hoon, Ko Hyun Soo, Kwon Yeong Hyeon, Lee Moon Il

Принадлежит: LG ELECTRONICS INC.

The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting an RS (Reference Signal) from a transmission end. The present invention relates to an RS transmission method and an apparatus therefore, comprising the steps of: confirming RS resources which are defined according to each layer; and transmitting the precoded RS for the layers to a receiving end through a multiple antenna, wherein the RS resource includes a 1index for indicating an RS resource pattern group in which the precoded RS is mapped within a resource block and a 2index for indicating a code resource for multiplexing the precoded RSs within the RS resource pattern group. 1. A method for transmitting signals by a communication apparatus in a wireless communication system , the method comprising:mapping, by the communication apparatus, a plurality of reference signals to one or more resource blocks; andtransmitting, by the communication apparatus, the mapped plurality of reference signals on respective antenna ports of a first and second set of antenna ports,wherein each reference signal transmitted on the first set of antenna ports is code division multiplexed to a first group of resource elements in the one or more resource blocks by using a corresponding orthogonal sequence,wherein each reference signal transmitted on the second set of antenna ports is code division multiplexed to a second group of resource elements in the one or more resource blocks by using a corresponding orthogonal sequence, andwherein the first set of antenna ports comprises antenna ports {N, N+1, N+4, N+6} and the second set of antenna ports comprises antenna ports {N+2, N+3, N+5, N+7}.2. The method according to claim 1 , wherein the first group of resource elements or the second group of resource elements comprise three pairs of resource elements in one resource block claim 1 , two resource elements in each of the three pairs are contiguous in a time ...

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Номер записи: 70

16-06-2016 дата публикации

Multicode transmitter

Номер: US20160170009A1

Автор: Atul Jain, David A. Whelan

Принадлежит: Boeing Co

Systems, methods, and apparatus for transmitting and receiving signals are disclosed. In one or more embodiments, the disclosed method involves splitting a signal into low power portions. The method further involves coding the low power portions to produce coded low power portions, where the coding comprises convolving each low power portion with a respective different code. Also, the method involves summing the coded low power portions to produce a resultant coded signal. In addition, the method involves transmitting the resultant coded signal towards a target object. Additionally, the method involves receiving a reflected resultant coded signal, where the resultant coded signal reflects off the target object to produce the reflected resultant coded signal. Also, the method involves decoding the reflected resultant coded signal to produce a decoded signal. Further, the method involves correlating the decoded signal to produce a complete received signal.

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Номер записи: 71

14-05-2020 дата публикации

INTERFERENCE AWARE RECIPROCAL CHANNEL SOUNDING REFERENCE SIGNAL

Номер: US20200154444A1

Автор: Bhushan Naga, Ji Tingfang, Jiang Jing, Mukkavilli Krishna Kiran, SMEE John Edward, Soriaga Joseph Binamira

Принадлежит:

Systems, devices, and methods associated with interference aware sounding reference signals are provided. A method for wireless communication includes receiving, at a wireless communication device in communication with a first base station, an interfering signal from a second base station (or others); determining, at the wireless communication device, a spatial direction of the interfering signal; and transmitting, with the wireless communication device, a signal to the first base station based on the spatial direction of the interfering signal. Another method includes receiving, at a first base station, a signal from a wireless communication device, the signal based on a spatial direction of an interfering signal received by the wireless communication device from a second base station (or others); transmitting, with the first base station, a downlink communication to the wireless communication device, the downlink communication beamformed in the spatial direction based on the signal received from the wireless communication device. 1. A method for wireless communication , the method comprising:receiving, by a first communication device from a wireless communication device, a first signal during a first time period, the first signal based on a spatial direction of an interfering signal received by the wireless communication device from a second communication device, and the first time period configured for a transmission from a first antenna arrangement of the wireless communication device;receiving, by the first communication device from the wireless communication device, a second signal during a second time period after the first time period, the second signal based on the spatial direction of the interfering signal, and the second time period configured for a transmission from a second antenna arrangement of the wireless communication device; andtransmitting, by the first communication device to the wireless communication device, a communication beamformed in a ...

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Номер записи: 72

14-06-2018 дата публикации

Multi-user mimo systems and methods

Номер: US20180167952A1

Автор: Dong-Sheng Yu, Jianming Wu, Ming Jia, Peiying Zhu, Wen Tong

Принадлежит: BlackBerry Ltd

A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality, capacity, and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric, and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.

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Номер записи: 73

30-05-2019 дата публикации

SYSTEMS AND METHODS FOR FOCUSING BEAMS WITH MODE DIVISION MULTIPLEXING

Номер: US20190165849A1

Автор: ASHRAFI NIMA, ASHRAFI SOLYMAN, LINQUIST ROGER D.

Принадлежит:

A system for focusing an orbital angular momentum (OAM) multiplexed beam comprising OAM signal processing circuitry for generating an OAM multiplexed signal. The OAM multiplexed signal includes a plurality of data streams each having a unique orbital angular momentum applied thereto and multiplexed together within the OAM multiplexed signal. Each unique orbital angular momentum has a beam helicity value greater than l=2. An antenna array control circuit controls transmission of the multiplexed OAM signal from each of a plurality of antennas in an antenna array toward a focus point located below the ground as a transmission beam to cause the transmitted OAM multiplexed signals to converge at the focus point below the ground at substantially a same time to overcome a divergence of the transmitted plurality of OAM multiplexed signals caused by the beam helicity value of greater than l=2 for each of the unique orbital angular momentum. 1. A method for focusing an orbital angular momentum (OAM) multiplexed beam , comprising:receiving an OAM multiplexed signal from a data processing source, the OAM multiplexed signal including a plurality of data streams each having a unique orbital angular momentum applied thereto and multiplexed together within the OAM multiplexed signal, each unique orbital angular momentum having a beam helicity value greater than l=2;splitting the OAM multiplexed signal into a plurality of OAM multiplexed signals;providing each of the plurality of OAM multiplexed signals to a transmitting antenna of a plurality of transmitting antennas of an antenna array;controlling a timing of transmissions of each of the plurality of OAM multiplexed signals from an associated transmitting antenna of the plurality of transmitting antennas to cause a transmitted plurality of OAM multiplexed signals to focus at a predetermined focus point located below ground at substantially a same time to overcome a divergence of the transmitted plurality of OAM multiplexed signals ...

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Номер записи: 74

25-06-2015 дата публикации

METHOD FOR TRANSMITTING REFERENCE SIGNAL TO ANTENNA PORT IN WIRELESS ACCESS SYSTEM

Номер: US20150180628A1

Автор: Chung Jaehoon, Kim Jinmin, Ko Hyunsoo

Принадлежит: LG ELECTRONICS INC.

The present invention provides various methods for transmitting a channel state information reference signal (CSI-RS) by varying a transmission period for each antenna port or antenna port group, and also provides apparatuses supporting the methods. The method for receiving a CSI-RS in a wireless access system according to one aspect of the present invention may comprise the steps of: receiving a CSI-RS component information element for setting CSI-RS transmission periods for two or more antenna ports to be mutually different; receiving CSI-RSs for each of the two or more antenna ports based on the CSI-RS component information element; and acquiring channel state information for each of the two or more antenna ports based on the received CSI-RS. 1. A method for receiving a channel state information reference signal (CSI-RS) in a wireless access system , the method comprising:receiving a CSI-RS configuration information element for differently setting transmission periods of CSI-RSs for each of at least two antenna ports;receiving the CSI-RSs for each of the at least two antenna ports based on the CSI-RS configuration information element; andobtaining a channel state information for each of the at least two antenna ports based on the received CSI-RSs.2. The method of claim 1 , wherein the CSI-RS configuration information element includes at least two subframe configuration parameters indicating the transmission periods of the at least two antenna ports claim 1 , respectively.3. The method of claim 1 , further comprising: reporting the channel state information to a base station.4. A method for receiving a channel state information reference signal (CSI-RS) in a wireless access system claim 1 , the method comprising:receiving a CSI-RS configuration information element for differently setting transmission periods of CSI-RSs for each of at least two antenna port sets;receiving the CSI-RSs for each of the at least two antenna port sets based on the CSI-RS configuration ...

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Номер записи: 75

21-05-2020 дата публикации

Methods and Systems For Enabling Feedback In Wireless Communication Networks

Номер: US20200162138A1

Автор: Fong Mo-Han, Ma Jianglei, Tong Wen, Zhang Hang, ZHU PEIYING

Принадлежит:

Aspects of the present invention provide additional MAC functionality to support the PHY features of a wireless communication system framework. The additional MAC functionality aids in enabling feedback from wireless terminals to base stations. In some aspects of the invention the feedback is provided on an allocated feedback channel. In other aspects of the invention the feedback is provided by MAC protocol data units (PDU) in a header, mini-header, or subheader. The feedback may be transmitted from the wireless terminal to the base station autonomously by the wireless terminal or in response to an indication from the base station that feedback is requested. Aspects of the invention also provide for allocating feedback resources to form a dedicated feedback channel. One or more of these enhancements is included in a given implementation. Base stations and wireless terminals are also described upon which methods described herein can be implemented. 135-. (canceled)36. A method for transmitting feedback in a wireless communication network , the method comprising:at a mobile device:receiving, from a base station, signaling including a feedback request message utilizing orthogonal frequency division multiplexing (OFDM) in an uplink mapping component of a downlink transmission, wherein the feedback request message indicates allocated uplink resources for feedback information and a relative delay in data frames with reference to a current data frame when feedback information is to be provided by the mobile device on the allocated uplink resources; andtransmitting the feedback information requested by the base station according to the feedback request message.37. The method of claim 36 , further comprising:transmitting the feedback information requested by the base station periodically on the allocated uplink resources in response to the feedback request message.38. The method of claim 37 , wherein a period of the allocated uplink resources is determined from at least the ...

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Номер записи: 76

22-06-2017 дата публикации

MULTIPLE INPUT MULTIPLE OUTPUT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WITH INDEX MODULATION, MIMO-OFDM-IM, COMMUNICATIONS SYSTEM

Номер: US20170180032A1

Автор: BASAR Ertugrul

Принадлежит: ISTANBUL TEKNIK UNIVERSITESI REKTORLUGU

A communication system for the next generation wireless communications technology standards. The communication system architecture is created by the combination of the index modulation technique and the multiple input, multiple output orthogonal frequency division multiplexing which eliminates the need to utilize complex equalizers by parsing high speed data strings and transmitting them over multiple orthogonal subcarriers, and allows the bits to be transmitted via active subcarrier indices. The OFDM-IM and multiple input multiple output communication techniques are used in tandem. The communication system can be used in future generation mobile communication systems and standards (5G and beyond), Local Area Network system and standards, terrestrial digital TV system and standards, multi-carrier communication systems and broadband digital communication systems. 1. A multiple input multiple output orthogonal frequency division multiplexing with index modulation (MIMO-OFDM-IM) communications system , comprising:at least two transmit antennas in a transmitter side for transmitting signals obtained after orthogonal frequency division multiplexing with index modulation, wherein each transmit antenna transmits OFDM-IM frames;at least two receive antennas in a receiver side for receiving the signals transmitted from the transmit antennas for detection and demodulation;a block interleaver in the transmitter side, wherein said block interleaver interleaves the OFDM-IM frames to minimize the correlation between channel coefficients corresponding to different OFDM-IM subcarriers;a minimum mean square error (MMSE) detection and log-likelihood ratio (LLR) calculation based detector in the receiver side to detect and demodulate the OFDM-IM frames received from said each transmit antenna, wherein the detector is enabled to separate the OFDM-IM frames received from said each transmit antenna;a successive minimum mean square error (MMSE) estimator to eliminate interference between ...

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Номер записи: 77

18-09-2014 дата публикации

Transmitting spread signal in communication system

Номер: US20140269965A1

Автор: Daewon Lee, Dong Wook Roh, Joon Kui Ahn, Jung Hoon Lee, Ki Jun Kim

Принадлежит: LG ELECTRONICS INC

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information.

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Номер записи: 78

02-07-2015 дата публикации

Apparatus and method for estimating channel in wireless local area network (wlan) system

Номер: US20150188743A1

Автор: Chang Wahn YU, Hee Soo Lee, Sok Kyu Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

A method and apparatus for estimating a channel in a wireless local area network (WLAN) are provided. A channel estimation apparatus may include a channel estimation information combiner to combine at least one channel estimation information based on a difference between cyclic delay diversity (CDD) values, and a phase applier to generate a first phase value and to apply the first phase value to the combined channel estimation information.

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Номер записи: 79

28-06-2018 дата публикации

ANALOG BEAMFORMING DEVICES

Номер: US20180183509A1

Автор: DUPLEICH Diego, HAEFNER STEPHAN, LUO Jian, Mueller Robert, RÖDING Matthias, Schneider Christian, SCHULZ Dominik, THOMAE Reiner

Принадлежит:

An analog beamforming transmitter includes: a plurality of beamforming transmission circuits coupled in parallel between a signal input and an array of antenna ports, wherein the signal input is configured to receive an analog complex-valued communication signal having an in-phase and a quadrature component, wherein each antenna port of the array of antenna ports is configured to provide a dual-polarized antenna signal having a first polarization component and a second polarization component, wherein each beamforming transmission circuit is coupled between the signal input and a respective antenna port of the array of antenna ports, wherein each beamforming transmission circuit comprises a first coefficient input for receiving a first analog complex-valued beamforming coefficient a set of first analog complex-valued beamforming coefficients and a second coefficient input for receiving a second analog complex-valued beamforming coefficient of a set of second analog complex-valued beamforming coefficients. 1. An analog polarization adjustment transmitter , comprising:a plurality of polarization adjustment transmission circuits coupled in parallel between a signal input and an array of antenna ports;wherein the signal input is configured to receive an analog complex-valued communication signal having an in-phase and a quadrature component;wherein each antenna port of the array of antenna ports is configured to provide a dual-polarized antenna signal having a first polarization component and a second polarization component;wherein each polarization adjustment transmission circuit is coupled between the signal input and a respective antenna port of the array of antenna ports;wherein each polarization adjustment transmission circuit comprises a first coefficient input for receiving a first analog real-valued polarization adjustment coefficient of a set of first analog real-valued polarization adjustment coefficients and a second coefficient input for receiving a second ...

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Номер записи: 80

09-07-2015 дата публикации

Line of sight (los) multiple-input and multiple-output (mimo) system for reducing distance separating antennas

Номер: US20150195016A1

Автор: Bong Su Kim, Jong Soo Lim, Kwang Seon Kim, Min Soo Kang, Woo Jin Byun

Принадлежит: Electronics and Telecommunications Research Institute ETRI

A line of sight (LOS) multiple-input and multiple-output (MIMO) system and a method of designing the system are provided, wherein a MIMO transmitter may include N transmission antennas, and an output transfer function of the MIMO transmitter may be adjusted based on phase difference between a direct path from each of the N transmission antennas to each of the M reception antennas and a delay path from each of the N transmission antennas to each of the M reception antennas.

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Номер записи: 81

13-06-2019 дата публикации

MULTI-ANTENNA SYSTEM AND PRECODING METHOD THEREOF

Номер: US20190181994A1

Автор: CHEN JIA-MING, HSU Jen-Yuan, LAI Jiun-You, Lin Ming-Che

Принадлежит:

A precoding method in a multi-antenna system includes the following steps. A reference device transmits a first reference signal to base station antennas. A base station calculates uplink channel information and transmits it to a coordination server. The base station transmits a second reference signal to the reference device. The reference device calculates downlink channel information and transmits it to the coordination server. The coordination server performs the following steps: calculate carrier frequency offsets (CFO) between base stations according to the uplink channel information; calculate channel calibration coefficients according to the CFO, the uplink channel information, and the downlink channel information; calculate a first downlink channel at a first time point according to a user equipment's first uplink channel and the channel calibration coefficients; use a prediction function to predict a second downlink channel at a second time point; generate a precoder according to the second downlink channel. 1. A precoding method in a multi-antenna system , the method comprising:transmitting, by at least one reference device, a first reference signal to a plurality of base station antennas;calculating, by at least one base station, a plurality of uplink channel information of the base station antennas according to the first reference signal, and transmitting the uplink channel information to a coordination server;calculating, by the coordination server, a carrier frequency offset between the base station antennas according to the uplink channel information;transmitting, by the at least one base station, a second reference signal to the at least one reference device;calculating, by the at least one reference device a plurality of downlink channel information of the base station antennas according to the second reference signal, and transmitting the downlink channel information to the coordination server;calculating, by the coordination server, a channel ...

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Номер записи: 82

29-06-2017 дата публикации

Transmission Of Information In A Wireless Communication System

Номер: US20170188348A1

Автор: Cai Zhijun, Earnshaw Andrew Mark, Fong Mo-Han, Harrison Robert Mark, Heo Youn Hyoung, McBeath Sean Michael, Xu Hua

Принадлежит: BlackBerry Limited

Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method for the transmission of information in a wireless communication system comprises receiving a downlink message, wherein the downlink message includes a first control channel element; determining a first index using the location of the first control channel element; determining a second index; determining a first orthogonal resource using the first index; determining a second orthogonal resource using the second index; spreading an uplink message using the first orthogonal resource to form a first spread signal; spreading the uplink message using a second orthogonal resource to form a second spread signal; transmitting the first spread signal using a first antenna; and transmitting the second spread signal using a second antenna. 1. A method for the transmission of information in a wireless communication system , comprising:receiving a downlink message, wherein said downlink message includes a first control channel element;determining a first index using the location of said first control channel element;determining a second index;determining a first orthogonal resource using said first index;determining a second orthogonal resource using said second index;spreading an uplink message using said first orthogonal resource to form a first spread signal;spreading said uplink message using said second orthogonal resource to form a second spread signal;transmitting said first spread signal using a first antenna; andtransmitting said second spread signal using a second antenna.2. The method of claim 1 , wherein said determining a second index uses the location of a second control channel element of said downlink message.3. The method of claim 1 , wherein said determining a second index further comprises:obtaining said second index from another downlink message.4. The method of claim 1 , wherein said determining a second index uses ...

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Номер записи: 83

05-07-2018 дата публикации

HIGH SPEED PHASE SHIFT KEYING MODULATOR

Номер: US20180191425A1

Автор: LEE Ho Jik, YOO Tae Sam

Принадлежит: GENOHCO INC.

Provided is a high speed phase shift keying modulator. The high speed phase shift keying modulator has variable pipeline buffers formed at an input side and an output side of a bandlimiting filter and a compensation filter to ensure timing margins of the bandlimiting filter and the compensation filter, so that a ultra-high speed phase shift keying modulator is provided. 1. A high speed phase shift keying modulator comprising:a mapper configured to map a signal to modulating symbols representing a position according to an amplitude and a phase constellation;a first pipeline buffer having an in-phase component of an output of the mapper as an input;a second pipeline buffer having a quadrature phase component of the output of the mapper as an input;a first square root raised cosine (SRRC) filter having an output signal of the first pipeline buffer as an input;a second SRRC filter having an output signal of the second pipeline buffer as an input;a third pipeline buffer having an output signal of the first SRRC filter as an input;a fourth pipeline buffer having an output signal of the second SRRC filter as an input;a first compensation filter having an output signal of the third pipeline buffer as an input and configured to compensate for signal distortion;a second compensation filter having an output signal of the fourth pipeline buffer as an input and configured to compensate for signal distortion;a first digital-analog converter (DAC) having an output signal of the first compensation filter as an input; anda second DAC having an output signal of the second compensation filter as an input.2. The high speed phase shift keying modulator of claim 1 , wherein the high speed phase shift keying modulator is implemented using a field programmable gate array (FPGA).3. The high speed phase shift keying modulator of claim 2 , wherein the first and second SRRC filters and/or the first and second compensation filters are implemented in a digital signal processing unit in the FPGA ...

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Номер записи: 84

30-07-2015 дата публикации

Adjusting Receive-Transmit Timing to Compensate for Switching Errors in a Communication System

Номер: US20150215887A1

Автор: Kazmi Muhammad, Nejatian Alireza

Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Techniques for compensating for the time misalignment of receive-transmit switching in a multi-antenna radio network node are disclosed. An example method begins with the detection () of signal transmission timing for each of two or more antennas associated with the radio network node, for at least a first transmission period. Next, the radio network node determines () that transmit timing for at least one of the antennas is misaligned by at least a first threshold time interval, based on the detected signal transmission timings. The example method continues with the adjustment () of transmit timing for at least one of the antennas for one or more subsequent transmission periods, responsive to determining that the transmission timing for at least one of the antennas is misaligned. 148-. (canceled)49. A method for a radio network node to control downlink transmission timing , the method comprising:detecting a signal transmission timing for each of two or more antennas associated with the radio network node, for at least a first transmission period;determining, based on the detected signal transmission timings, that transmit timing for at least one of the antennas is misaligned by at least a first threshold time interval;responsive to the determining, adjusting transmit timing for at least one of the antennas for one or more subsequent transmission periods;transmitting assistance information to one or more mobile terminals, the assistance information indicating that the adjustment of the downlink timing is to occur or has occurred.50. The method of claim 49 , wherein the detecting of the signal transmission timing is performed at least at one of the following occasions:when switching between uplink and downlink subframes in a time-division duplexing (TDD) frame;when transmission power changes within the first transmission period;when transmission power changes between Orthogonal Frequency-Division Multiple Access (OFDMA) symbols within the first transmission period.51 ...

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Номер записи: 85

27-06-2019 дата публикации

Transmission Path Identification Based On Propagation Channel Diversity

Номер: US20190199145A1

Автор: Ahmad Moghaddam, Hatem Ibrahim Zeine

Принадлежит: Ossia Inc

Various embodiments of the present technology relate generally to wireless power systems. More specifically, some embodiments relate to the use of time reversal techniques utilizing time diversity (e.g., different multipath arrivals at the same antenna) to achieve coherency from the same transmission node. For example, instead of initiating outgoing transmissions (e.g., power signals) at the same time, various embodiments can initiate the outgoing signals from the various antennas in a staggered timing that is a reversal of the arrival times of an incoming signal. As a result of staggering the start of the outgoing signals, the signals will arrive at the destination at approximately the same time even though they have traveled different paths having different propagation delays.

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Номер записи: 86

27-06-2019 дата публикации

Transmission and reception signal processor and method

Номер: US20190199495A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Panasonic Intellectual Property Corp of America

A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band. A reception apparatus is provided, which includes a plurality of antennas that receive a plurality of OFDM modulation signals; a plurality of OFDM demodulators that transform the plurality of OFDM modulation signals to a plurality of reception signals using Fourier transform; an estimator that outputs a distortion estimation signal using one or more symbols for demodulation included in the plurality of reception signals; and a demodulator that compensates for distortion of the reception signals using the distortion estimation signal and demodulates a data symbol included in the reception signals.

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Номер записи: 87

20-07-2017 дата публикации

Detecting the Number of Transmit Antennas in a Base Station

Номер: US20170207844A1

Автор: Callard Aaron, Ma Jianglei

Принадлежит:

Data is scrambled at a transmitter according to one of a number of predetermined scrambling sequences which are associated with a particular one of a number of predetermined transmit antenna diversity schemes (i.e., a specific number of transmit antenna ports). Received data is decoded using one or more of the known transmit antenna diversity schemes and the scrambled data is descrambled according to a corresponding descrambling sequence (related to the scrambling sequence). Based on the descrambled data, the receiver determines which transmit antenna diversity scheme (i.e., the number of antenna ports) is used by the transmitter. In one specific embodiment, CRC parity data is scrambled in the transmitter and the receiver descrambles the recovered CRC parity data according to a descrambling sequence, computes CRC parity data from the received data, and compares the descrambled CRC parity data to the newly computed CRC parity data. 1. A method comprising:selecting a scrambling sequence from a plurality of scrambling sequences dependent upon a number of transmit antennas at a transmitter, wherein the selected scrambling sequence indicates that the transmitter operates with only one transmit antenna or with only two transmit antennas; andscrambling a plurality of bits of broadcast channel data using the selected scrambling sequence.2. The method of claim 1 , wherein the broadcast channel data comprises transport data and cyclic redundancy check (CRC) data claim 1 , wherein the CRC data is computed based on the transport data.3. The method of claim 1 , further comprising transmitting the plurality of scrambled bits within a data frame to a remote communication device claim 1 , wherein the plurality of scrambled bits are transmitted using a plurality of resource elements.4. The method of claim 1 , further comprising transmitting the plurality of scrambled bits within a broadcast channel in accordance with a Long Term Evolution (LTE) standard.5. The method of claim 4 , ...

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Номер записи: 88

29-07-2021 дата публикации

TRANSMISSION DEVICE AND TRANSMISSION METHOD

Номер: US20210234651A1

Автор: Kimura Tomohiro, Motozuka Hiroyuki, MURAKAMI Yutaka, Ouchi Mikihiro

Принадлежит:

A transmission device that improves data reception quality includes: a first pilot inserter that inserts a pilot signal into a first precoded signal; a phase changer that applies a phase change of i×Δλ to the second precoded signal, where i is a symbol number and an integer that is greater than or equal to 0; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. Δλ satisfies π/2 radians<Δλ<π radians or a radians<Δλ<3π/2 radians. When the communications scheme is an OFDM scheme, the phase changer and the phase changer apply a phase change, and when the communications scheme is a single-carrier scheme, do not apply a phase change. 12-. (canceled)3. A transmission device , comprising:a mapper that, in operation, generates first baseband signals and second baseband signals according to a 64-QAM scheme;a signal processor that, in operation, generates first transmission signals and second transmission signals from the first baseband signals and the second baseband signals; anda transmitter that, in operation, transmits the first transmission signals and the second transmission signals, whereinthe signal processor performs a precoding and a first phase changing for an orthogonal frequency division multiplexing (OFDM) transmission, the first phase changing applies a phase change of i×Δλ, where i is a symbol number and Δλ is π−π/m radians, where m is an integer greater than 3, andthe signal processor performs a second phase changing for a single-carrier transmission.4. A transmission method , comprising:generating first baseband signals and second baseband signals according to a 64-QAM scheme;generating first transmission signals and second transmission signals from the first baseband signals and the second baseband signals; andtransmitting the first transmission signals and the second ...

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Номер записи: 89

26-07-2018 дата публикации

DEVICE AND METHOD FOR PERFORMING NON-ORTHOGONAL MULTIPLEXING

Номер: US20180213535A1

Автор: KUSUNOKI Shigeo

Принадлежит:

A device includes circuitry configured to spread one or more symbols with one or more orthogonal codes into spread signals having a predetermined number of bits. The amplitude of the spread signals is modified via one or more layer coefficients and the spread signals are multiplexed into a layered transmit signal. 1. A device comprising: spread symbols into spread signals having a predetermined number of bits,', 'change an amplitude of the spread signals via layer coefficients, and', 'multiplex the amplitude modified spread signals into a layered transmit signal; and, 'circuitry configured to'} 'determine a highest layer coefficient to be greater than a sum of a plurality of remaining lower layer coefficients.', 'a communication interface configured to transmit the layered transmit signal, wherein the circuitry is configured to'}2. The device of claim 1 , wherein the circuitry is further configured todetermine the layer coefficients based on a coefficient difference factor that is less than one, andallocate the layered transmit signal to a predetermined number of subcarriers.3. The device of claim 2 , wherein the predetermined number of subcarriers corresponds to the predetermined number of bits of the spread signal.4. The device of claim 1 , wherein the circuitry is further configured to reduce a physical layer bit error rate by increasing the coefficient difference factor.5. The device of claim 1 , wherein the circuitry is further configured to modify a total transmit power by modifying at least one of a sum of the layer coefficients or the predetermined number of bits of the spread signal.6. The device of claim 1 , wherein the circuitry is further configured to reduce a total transmit power for the layered transmit signal by adding an offset to at least one of the layer coefficients.7. The device of claim 6 , wherein the circuitry is further configured to add the offset to alternating layers of the layered transmit signal.8. The device of claim 1 , wherein the ...

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Номер записи: 90

05-08-2021 дата публикации

Receiver device, transmitter device, reception method, and transmission method

Номер: US20210243733A1

Автор: Akihiko Nishio, Ayako Horiuchi, Hidetoshi Suzuki, Masayuki Hoshino

Принадлежит: Sun Patent Trust Inc

A communication apparatus includes circuitry and a transmitter. The circuitry maps a precoded downlink control signal to one of a plurality of mapping candidates. The precoded downlink control signal is prepared using a first precoding for single-antenna port transmission with a single antenna port in localized allocation mode. The precoded downlink control signal is prepared using a second precoding for multi-antenna ports transmission with two antenna ports in distributed allocation mode. The plurality of mapping candidates is comprised of a plurality of aggregation levels, and one or more of the aggregation levels that is higher than a boundary among the plurality of aggregation levels is associated with only the multi-antenna ports transmission, the boundary being determined based on signaling indicated from the base station apparatus. The transmitter transmits the precoded downlink control signal.

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Номер записи: 91

13-08-2015 дата публикации

METHOD AND APPARATUS FOR SIGNAL QUALITY LOSS COMPENSATION IN MULTIPLEXING TRANSMISSION SYSTEMS

Номер: US20150229436A1

Автор: Cheng Jung-Fu Thomas, Grant Stephen J., Molnar Karl J., RAMESH Rajaram, Wang Yi-Pin Eric

Принадлежит:

A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing. 1. A method of feeding back received signal quality information , the method comprising:receiving, at a receiver, a multiplexed signal including two or more signal streams;calculating, at the receiver, a received signal quality for the multiplexed signal as a function of two or more different stream-specific received signal qualities determined for the multiplexed signal;determining, at the receiver, a loss parameter that represents a loss in the received signal quality for the multiplexed signal arising from the two or more different stream-specific received signal qualities, wherein the determined loss parameter is useable to compensate the calculated received signal quality for the loss;generating, at the receiver, received signal quality information including the calculated received signal quality, or a quantized version thereof, and the loss parameter; andtransmitting, from the receiver, the received signal quality information as feedback.2. The method of claim 1 , wherein calculating the received signal quality comprises calculating a mode-specific received signal ...

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Номер записи: 92

02-08-2018 дата публикации

METHOD AND DEVICE FOR CANCELLING INTER-SYMBOL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM

Номер: US20180219717A1

Автор: Kim Jung Ju, LEE Hyunyong, Lee Joon-Young

Принадлежит:

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). The present invention provides a method and a device for cancelling inter-symbol interference in a wireless communication system. A method for a base station in a wireless communication system can comprises the steps of: transmitting multiple synchronous signals through multiple antennas to a terminal; receiving information on a propagation delay difference among the multiple synchronous signals from the terminal; and determining signal transmission timing for each of the multiple antennas on the basis of the information on the propagation delay difference. 115-. (canceled)16. An apparatus of a base station (BS) in a wireless communication system , the apparatus comprising:at least one transceiver; andat least one processor operably coupled to the at least one transceiver,wherein the at least one processor is configured to:transmit a plurality of synchronization signals to through a plurality of antennas;receive information related to a propagation delay difference (PDD) for the plurality of synchronization signals from a terminal; andtransmit signals through the plurality of antennas by adjusting a transmission timing of at least one of the signals based on the information related to the PDD.17. The apparatus of claim 16 , wherein the information related to the PDD includes identification information for indicating a reference antenna of the plurality of antennas and information indicating a PDD between the reference antenna and at least one other of the plurality of antennas.18. The apparatus of claim 17 , and wherein the reference antenna corresponds to a synchronization signal which is received first or last at the terminal among the plurality of synchronization signals claim 17 , andwherein each of the synchronization signals corresponds to each of ...

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Номер записи: 93

23-10-2014 дата публикации

APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION IN BEAMFORMING COMMUNICATION SYSTEM

Номер: US20140314167A1

Автор: JEONG Su-Ryong, KIM Tae-Young, PARK Jeong-Ho, SEOL Ji-Yun

Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A method for operating a mobile station in a mobile communication system. The method includes: receiving a plurality of transmit (Tx) beam signals from a base station; generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beam signals; and transmitting feedback information including the indication information to the base station. 1. A method for operating a mobile station in a mobile communication system , the method comprising:receiving a plurality of transmit (Tx) beam signals from a base station;generating indication information for indicating a difference in arrival time between effective Tx beam signals selected from the received Tx beam signals; andtransmitting feedback information including the indication information to the base station.2. The method of claim 1 , wherein the feedback information further includes channel quality information for the effective Tx beam signals.3. The method of claim 1 , wherein the plurality of Tx beam signals include a reference channel signal.4. The method of claim 1 , wherein the effective Tx beam signals include a predetermined number of selected Tx beam signals having excellent received signal quality among the received Tx beam signals.5. The method of claim 1 , wherein generating the indication information comprises:sequentially arranging the selected effective Tx beam signals;grouping effective Tx beam signals in which a difference in arrival time between adjacent Tx beam signals is smaller than a preset threshold value among the sequentially arranged effective Tx beam signals; andgenerating the indication information indicating whether each of the selected effective Tx beam signals is included in the grouped effective Tx beam signals.6. The method of claim 1 , wherein generating the indication information comprises:calculating a relationship of the difference in arrival time between the selected effective Tx beam signals; andgenerating ...

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Номер записи: 94

11-07-2019 дата публикации

Method and device for transmitting signal by switching phase in mobile communication system

Номер: US20190215204A1

Автор: Chanho Choi, Chongdon KIM, Hayoung YANG, Seijoon Shim

Принадлежит: SAMSUNG ELECTRONICS CO LTD

Disclosed are a method and a device for differently applying phase rotations for each antenna by dividing a frequency band in order to solve a problem in which reception performance deteriorates in a specific subcarrier when the correlation between antennas is high. According to the present invention, a method by which a transmitter transmits a signal comprises the steps of: estimating the transmission correlation between respective transmission paths; calculating a phase rotation value to be applied to a transmission signal on the basis of the estimated transmission correlation; applying a phase rotation in accordance with the phase rotation value to the transmission signal; and transmitting the transmission signal.

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Номер записи: 95

02-07-2020 дата публикации

Antenna configuration parameters

Номер: US20200212985A1

Автор: FENG Jiang, Jonathan Segev, Qinghua Li, Xiaogang Chen, Xintian Lin, Yuan Zhu

Принадлежит: FENG Jiang, Jonathan Segev, Qinghua Li, Xiaogang Chen, Xintian Lin, Yuan Zhu

This disclosure describes systems, methods, and devices related to antenna configuration parameters. A device may determine one or more antennas having one or more phases. The device may determine a first delay associated with a first antenna of the one or more antennas. The device may determine a second delay associated with a second antenna of the one or more antennas. The device may cause to send a frame to a first station device using the first antenna, wherein the frame comprises a first indication of the delay associated with the first antenna and a second indication of the delay associated with the second antenna.

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Номер записи: 96

20-08-2015 дата публикации

Method and apparatus for transmitting reference signal in multiple antenna system

Номер: US20150236775A1

Автор: Hyun Soo Ko, Jae Hoon Chung, Moon Il Lee, Seung Hee Han

Принадлежит: LG ELECTRONICS INC

A method and an apparatus for transmitting a reference signal in a multiple antenna system are provided. The method includes transmitting a first reference signal based on a first sequence through a first antenna group, and transmitting a second reference signal based on a second sequence through a second antenna group, wherein the first reference signal and the second reference signal are transmitted through a same radio resource.

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Номер записи: 97

20-08-2015 дата публикации

TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM

Номер: US20150236835A1

Автор: Ahn Joon Kui, Kim Ki Jun, Lee Daewon, Lee Jung Hoon, Roh Dong Wook

Принадлежит: LG ELECTRONICS INC.

A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information. 2. The method of claim 1 , wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist on different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.4. The method of claim 1 , wherein the antennas A and B are first two contiguously numbered antennas claim 1 , and the antennas C and D are second two contiguously numbered antennas.5. The method of claim 1 , wherein the antennas A and B are odd-numbered antennas claim 1 , and the antennas C and D are even-numbered antennas.7. The method of claim 6 , wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist on different Orthogonal Frequency-Division Multiplexing (OFDM) symbols.9. The method of claim 6 , wherein the antennas A and B are first two contiguously numbered antennas claim 6 , and the antennas C and D are second two contiguously numbered antennas.10. The method of claim 6 , wherein the antennas A and B are odd-numbered antennas claim 6 , and the antennas C and D are even-numbered antennas.12. The apparatus of claim 11 , wherein the first set of four available neighboring subcarriers and the second set of four available neighboring subcarriers exist on different Orthogonal ...

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Номер записи: 98

10-08-2017 дата публикации

HYBRID BEAMFORMING-BASED OPEN-LOOP MIMO TRANSMISSION METHOD AND APPARATUS THEREFOR

Номер: US20170230089A1

Автор: HAN Jiyeon, KIM Chanhong, KIM Hyunjung, KIM Jaeyoel, KIM Taeyoung, NA Inhak, SEOL Jiyun

Принадлежит:

A method for a transmitter of a mobile communication system transmitting and receiving signals according to an embodiment of the present specification comprises the steps of: transmitting to a receiver system information for transmitting a signal to the receiver including a connection between a wireless resource and a transmitting antenna; transmitting a reference signal to the receiver based on the system information; and receiving from the receiver feedback information generated based on the reference signal. According to an embodiment of the present specification, in a beamforming transmission method of a mobile communication system, a transmitter can determine whether to perform digital pre-coding without advance information from a receiver and can consequently perform a transmission, and can thereby perform lower-overhead and efficient signal transmission/reception. 116-. (canceled)17. A method of a transmitter for transmitting a signal in a communication system , the method comprising:identifying a code for spreading a transmission signal from at least two code, the code corresponding to at least one antenna;identifying a beam information for beamforming the transmission signal, the beam information corresponding to the at least one the antenna based on the code;transmitting, to a receiver, the transmission signal spread based on the code via the at least one antenna based on the beam information; andreceiving, from the receiver, feedback information for the transmission signal.18. The method of claim 17 , wherein a spreading factor of the code identified based on scheduling information for the receiver.19. The method of claim 17 , wherein the transmission signal is spread based on the code if channel information corresponding to the receiver is not met a predefined threshold.20. The method of claim 17 , wherein the code is identified based on a correlation of each of the at least one code at the receiver.21. The method of claim 17 , wherein the feedback ...

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Номер записи: 99

27-08-2015 дата публикации

INTERFERENCE CANCELLATION IN A SPREAD SPECTRUM COMMUNICATION SYSTEM

Номер: US20150244417A1

Автор: Cheung Gary, Grieco Donald M., MESECHER DAVID K., Reznik Alexander

Принадлежит: INTERDIGITAL TECHNOLOGY CORPORATION

A method and apparatus used to transmit and receive weighted data transmissions over a plurality of antennas using a plurality of different pilot signals. Different pilot signals are produced and a different pilot signal of the plurality of pilot signals is transmitted on each of a plurality of antennas. Each of the pilot signals is derived from a pseudo noise (PN) sequence and a bit sequence of the PN sequence for each of the pilot signals is different. A plurality of data streams are produced in which each of the data streams has data bits combined with bits of a PN sequence. The data streams are weighted in response to weight information received from a receiving device and the plurality of weighted data streams are transmitted using the plurality of antennas. 1. A transmitting device comprising:circuitry configured to produce a plurality of pilot signals; wherein a different pilot signal of the plurality of pilot signals is transmitted on each of a plurality of antennas; wherein each of the pilot signals is derived from a pseudo noise (PN) sequence and a bit sequence of the PN sequence for each of the pilot signals is different;the circuitry is further configured to produce a plurality of data streams; wherein each of the data streams has data bits combined with bits of a PN sequence; andthe circuitry is further configured to weight the data streams in response to weight information received from a receiving device and transmit the plurality of weighted data streams using the plurality of antennas.2. The transmitting device of wherein the plurality of weighted data streams are transmitted to the receiving device.3. A method for use by a transmitting device claim 1 , the method comprising:producing a plurality of pilot signals; wherein a different pilot signal of the plurality of pilot signals is to be transmitted on a respective one of a plurality of antennas; wherein each of the pilot signals is derived from a pseudo noise (PN) sequence and a bit sequence of ...

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Номер записи: 100