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Небесная энциклопедия

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

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Мониторинг СМИ

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

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Применить Всего найдено 2248. Отображено 100.

01-03-2012 дата публикации

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

Номер: US20120051474A1

Автор: Deuk-Su Lyu, Eun-Young Choi, Hee-Jung Yu, Myung-Soon Kim, Sok-Kyu Lee, Taehyun Jeon

Принадлежит: Electronics and Telecommunications Research Institute ETRI

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

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Номер записи: 1

08-03-2012 дата публикации

MIMO OFDM System

Номер: US20120057661A1

Автор: Jack Harriman Winters, Nelson Ray Sollenberger, Ye Li

Принадлежит: AT&T Corp

A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

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Номер записи: 2

22-03-2012 дата публикации

CQI feedback mechanisms for distortion-aware link adaptation toward enhanced multimedia communications

Номер: US20120069927A1

Автор: Jeffrey R. Foerster, Minnie Ho, Ozgur OYMAN

Принадлежит: Intel Corp

Link adaptation parameters for encoding of a source are selected to minimize distortion between the source and a reconstructed source induced by transmission of the source over a multiple input multiple output (MIMO) channel. Such distortion-awareness and associated joint source-channel coding ideas to support link adaptation over MIMO channels may affect system architectures for MIMO systems. CQI feedback mechanisms may ensure that these distortion-aware MIMO link adaptation techniques are applicable for downlink channels, under different forms of link adaptation, including MS-controlled vs. BS-controlled link adaptation, long-term vs. dynamic link adaptation, and presence vs. absence of distortion-awareness at the BS, for different kinds of video coding including single-layer compression and layered compression.

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Номер записи: 3

17-05-2012 дата публикации

Apparatus for Transmitting and Receiving Data to Provide High-Speed Data Communication and Method Thereof

Номер: US20120121040A1

Автор: Deuk-Su Lyu, Eun-Young Choi, Hee-Jung Yu, Myung-Soon Kim, Sok-Kyu Lee, Taehyun Jeon

Принадлежит: Electronics and Telecommunications Research Institute ETRI

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

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Номер записи: 4

14-06-2012 дата публикации

Pilot addition method and pilot addition apparatus

Номер: US20120147829A1

Автор: Jianming Wu, Jie Zhang

Принадлежит: Fujitsu Ltd

A pilot addition method and a pilot addition apparatus. The pilot addition method is used in a transmitter for transmitting data to subscriber of an old system and subscriber of a new system serving as an updated system of the old system, including: judging whether or not to insert a pilot required by the subscriber of the new system into a current resource block, determining a sub-carrier symbol block serving as an insertion position of the pilot required by the subscriber of the new system, from one or more sub-carrier symbol blocks having a large influence on the statistical performance of a channel estimation for the subscriber of the old system; and inserting the pilot required by the subscriber of the new system into the sub-carrier symbol block serving as the insertion position of the pilot required by subscriber of a new system. determined by the determining.

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Номер записи: 5

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: 6

13-12-2012 дата публикации

Transmitter and method for transmitting data block in wireless communication system

Номер: US20120314801A1

Автор: Jong Ee OH, Min Ho CHEONG, Sok Kyu Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.

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Номер записи: 7

13-12-2012 дата публикации

Transmitter and method for transmitting data block in wireless communication system

Номер: US20120314802A1

Автор: Jong Ee OH, Min Ho CHEONG, Sok Kyu Lee

Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: encoding an information bit and generating a block coded with an NCBPSS bit; generating two sub-blocks by parsing the coded block; and transmitting the two sub-blocks to the transmitter. By preventing the bits that are contiguous to the encoding block from having continuous identical reliabilities on a signal constellation, the deterioration of the decoding performance of the transmitter can be prevented.

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Номер записи: 8

25-04-2013 дата публикации

Transmission of Information in a Wireless Communication System

Номер: US20130100833A1

Автор: HUA Xu, Mark Earnshaw, Mo-Han Fong, Robert Mark Harrison, Sean McBeath, Youn Heo, Zhijun Cai

Принадлежит: Individual

Methods, devices, and systems for the transmission of information in a wireless communication system are disclosed. In one embodiment, a method of transmission in a wireless communication system comprises determining by a wireless device ( 201 ) a configuration of a plurality of power amplifiers ( 207 ) to achieve a single antenna transmission mode; amplifying a signal by said wireless device ( 201 ) using the configuration of the plurality of power amplifiers ( 207 ) to form a plurality of amplified signals; simultaneously transmitting at or about the same time by the wireless device ( 201 ) to a base station ( 202 ) the plurality of amplified signals from a plurality of physical antennas ( 212 ), wherein the plurality of physical antennas ( 212 ) are coupled to the configuration of the plurality of power amplifiers ( 207 ); and wherein the measured transmit power from the totality of the plurality of physical antennas ( 212 ) is about the same as the required transmit power using the single antenna transmission mode.

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Номер записи: 9

06-06-2013 дата публикации

System and method for channel-adaptive antenna selection

Номер: US20130143506A1

Автор: Jack Winters, Pieter Roux, Pieter Van Rooyen, Severine Catreux-Erceg, Vinko Erceg

Принадлежит: Broadcom Corp

Systems and methods that provide channel-adaptive antenna selection in multi-antenna element communication systems are provided. In one embodiment, a method that selects a subset of receive antennas of a receiver to receive a transmitted RF signal may include, for example, one or more of the following: establishing possible subsets of the receive antennas; determining sets of channel parameter statistics corresponding to the possible subsets of the receive antennas; computing output bit error rates of the receiver, each output bit error rate being computed based on at least one set of channel parameter statistics; selecting a particular possible subset of the receive antennas based upon a criterion predicated on the computed output bit error rates; and connecting one or more RF chains of the receiver to the receive antennas of the selected particular possible subset.

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Номер записи: 10

27-06-2013 дата публикации

Wireless communication device and hybrid automatic repeat request transmission method

Номер: US20130163522A1

Автор: Isamu Yoshii, Lei Huang

Принадлежит: Panasonic Corp

By reducing the overlap between HARQ subpackets transmitted by means of a transmitting MS and a cooperative MS, the disclosed method is capable of increasing gains in HARQ IR signal synthesis. The method transmits a hybrid automatic repeat request (HARQ) in a cooperative communication system formed so as to comprise a transmitting mobile station (MS) and a cooperative MS, and involves creating individual HARQ subpackets transmitted by means of the transmitting MS and the cooperative MS such that said subpackets are arranged in mutually opposite directions in a circular buffer.

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Номер записи: 11

12-09-2013 дата публикации

Transmit Diversity Scheme

Номер: US20130235951A1

Автор: Jolyon White, Phong Nguyen

Принадлежит: NEC Corp

The present invention relates to methods for implementing transmit diversity in a telecommunication network. In particular there is provided an algorithm for performing transmit diversity encoding in a transmitter ( 100 ) and transmit diversity decoding in a receiver ( 1700 ) respectively. In the method processed pairs of data blocks ( 314.1 A, 314.1 B) are transmitted on a first antenna ( 112.1 ) on N sub-carriers in a first temporal order; and a second antenna ( 112.2 ) in the reverse temporal order.

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Номер записи: 12

03-10-2013 дата публикации

Multi-user communication using sparse space codes

Номер: US20130259149A1

Автор: Alireza Bayesteh, Amin Mobasher, Sagar Dhakal, Steve Hranilovic

Принадлежит: Individual

Multi-user sparse space codes are proposed as a new transmission scheme for uplink communication over a multi-user multiple-input-multiple-output (MIMO) communication channel.

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Номер записи: 13

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: 14

04-01-2018 дата публикации

BROADCAST SIGNAL TRANSMITTER/RECEIVER, AND BROADCAST SIGNAL TRANSCEIVING METHOD

Номер: US20180006766A1

Автор: BAEK Seoyoung, Ko Woosuk, Moon Sangchul

Принадлежит:

Disclosed are a broadcast signal transmitter, a broadcast signal receiver, and a method for transceiving a broadcast signal in the broadcast signal transmitter/receiver. A method for transmitting a broadcast signal comprises the following steps: signaling in-band signaling information to at least one of a service component physical layer pipe (PLP) including at least one service component of a broadcast service, a first information PLP including first service information applied to one broadcast service and a second information PLP including second service information applied commonly to a variety of broadcast services; performing the FEC encoding on data included in each PLP; performing time-interleaving on the FEC encoded data; generating a transmission frame including the time-interleaved data; and modulating the transmission frame and transmitting a broadcast signal including the modulated transmission frame. 112-. (canceled)13. A method for receiving a broadcast signal by an apparatus for receiving a broadcast signal , the method comprising:receiving the broadcast signal including a frame;detecting a first Orthogonal Frequency Division Multiplexing (OFDM) symbol and a second OFDM symbol in front of the frame;demodulating data of the frame by an OFDM method;parsing the frame including first layer data of a first physical layer pipe (PLP), second layer data of a second PLP and signaling data;decoding the signaling data; anddecoding the first layer data and the second layer data,wherein a postfix of the first OFDM symbol and a prefix of the second OFDM symbol are sequentially positioned in the time domain,wherein the signaling data includes type information for the first PLP including the first layer data, excluding the second PLP including the second layer data.14. The method of claim 13 , wherein the type information indicates whether sub-slicing is used for the first PLP including the first layer data.15. The method of claim 13 , wherein the postfix of the ...

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Номер записи: 15

07-01-2021 дата публикации

Initial Access Channel for Scalable Wireless Mobile Communication Networks

Номер: US20210007154A1

Автор: Boumendil Sarah, Jia Ming, Le Strat Evelyne, Ma Jianglei, Tong Wen, Xu Hua, Zhang Hang, ZHU PEIYING

Принадлежит:

Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure. 130.-. (canceled)31. An apparatus , comprising:one or more processing elements; and 'receive, via a wireless communication system having a system bandwidth, a first symbol carrying at least one primary synchronization sequence and a second symbol carrying at least one secondary synchronization sequence;', 'one or more memories having program instructions stored thereon that are executable by the one or more processing elements to cause the apparatus towherein the at least one primary synchronization sequence is selected from a set of two or more possible primary synchronization sequences common to multiple cells; andwherein the second symbol carrying the at least one secondary synchronization sequence is transmitted in an orthogonal frequency-division multiplexing (OFDM) symbol immediately following an OFDM symbol carrying a broadcast channel (BCH), and two OFDM symbols after transmission of the first symbol carrying the at least one primary synchronization sequence.32. The apparatus of claim 31 , wherein the broadcast channel is transmitted in a symbol at the end of a repeated frame.33. The apparatus of claim 32 , wherein the frame includes a single symbol for the at least one primary synchronization sequence and multiple symbols for the at least one secondary synchronization sequence.34. The apparatus of claim 31 , wherein the apparatus is a mobile device that further comprises:one or more ...

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Номер записи: 16

12-01-2017 дата публикации

METHOD OF CONTROLLING A COMMUNICATIONS LINK

Номер: US20170012682A1

Автор: BAINES Steven John

Принадлежит:

The present invention is directed to a method of controlling a communications link and apparatus configured to perform this method. This invention is particularly related to but in no way limited to MIMO (multiple inputs multiple outputs) wireless communications systems. The method comprises the steps of determining at the receiver the quality of the communications link and based on this, selecting a group of transmission parameters and an element from this group. These selections are then communicated to the transmitter. The transmission parameter may be the transmission configuration such as the modulation and coding scheme. The invention minimises the required feedback signalling from the receiver to the transmitter by exploiting temporal correlation of the parameter being controlled, whilst allowing rapid selection of the parameter. 1. A method for providing feedback from a user equipment (UE) to a base station of a wireless network , the method comprising: receiving signals from the base station of the wireless network;', 'determining a quality of a communication link based on the received signals;', 'selecting a predefined group of parameters and at least one parameter from the selected predefined group of parameters based on the determined quality of the communication link, the predefined group of parameters comprising an element corresponding to a modulation coding scheme (MCS);', 'sending to the base station an identification of the at least one selected parameter from the selected predefined group of parameters; and', 'sending to the base station an identification of the selected predefined group of parameters,', 'wherein the selected predefined group of parameters is selected from a plurality of predefined groups of parameters, and', 'wherein at least one predefined group of parameters includes a plurality of parameters., 'by the UE2. The method of claim 1 , wherein the at least one selected parameter comprises only one selected parameter.3. The method of ...

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Номер записи: 17

10-01-2019 дата публикации

METHOD AND APPARATUS FOR FTN COMMUNICATION USING TRANSMIT DIVERSITY

Номер: US20190013972A1

Автор: BAEK Myung-Sun, HUR Nam-Ho, Kim Young-Su, KWAK Sang-Woon, KWON Hae-Chan, LIM Hyoung-Soo, YUN Joung-Il

Принадлежит:

Disclosed herein are an apparatus and method for providing FTN communication using transmit diversity. A transmission apparatus generates a signal to be output through diversity modulation. A diversity order of diversity modulation may be set based on an FTN parameter, such as a variable for adjusting sampling time or a symbol transmission speed. When the diversity order is set based on the FTN parameter, the FTN parameter and the diversity order may be set so as to satisfy a QoS required of the transmission apparatus, such as a transmission rate and a Bit Error Rate. Depending on the circumstances, the set FTN parameter and diversity order may be provided to a reception apparatus that is to receive the output signal. 1. A method for transmitting a signal , performed by a transmission apparatus , comprising:setting a diversity order of diversity modulation based on a Faster-Than-Nyquist (FTN) parameter;generating a diversity signal by modulating a signal depending on the set diversity order;generating a linearly modulated signal by applying linear modulation, based on the FTN parameter, to the diversity signal; andoutputting the linearly modulated signal.2. The method of claim 1 , wherein the FTN parameter includes a variable for adjusting a sampling time.3. The method of claim 1 , wherein the FTN parameter includes a symbol transmission speed of linear modulation.4. The method of claim 3 , wherein the diversity order is set higher as the symbol transmission speed is higher.5. The method of claim 1 , further comprising:deriving the FTN parameter corresponding to a transmission rate required of the transmission apparatus.6. The method of claim 5 , further comprising:deriving the transmission rate from a Quality of Service (QoS) required of the transmission apparatus.7. The method of claim 1 , wherein the diversity order is set based on a Bit Error Rate required of the transmission apparatus.8. The method of claim 7 , wherein the Bit Error Rate is derived from a QoS ...

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Номер записи: 18

15-01-2015 дата публикации

MANAGEMENT FRAME MAP DIRECTED OPERATIONAL PARAMETERS WITHIN MULTIPLE USER, MULTIPLE ACCESS, AND/OR MIMO WIRELESS COMMUNICATIONS

Номер: US20150016332A1

Автор: Amini Peiman, Erceg Vinko, Fischer Matthew James, Kim Joonsuk, Lauer Joseph Paul

Принадлежит: BROADCOM CORPORATION

Management frame map directed operational parameters within multiple user, multiple access, and/or MIMO wireless communications. A management frame map may be generated within and transmitted from a first wireless communication device to a group of other wireless communication devices. Thereafter, certain subsequently transmitted packets may be analyzed and processed by the receiving wireless communication devices based on that earlier received management frame map. One or more operational parameters are determined for a subsequently transmitted packet based on the previously received management frame map. The operational parameters govern the manner in which at least a portion of the subsequently transmitted packet is processed. 1. A method for operating a wireless communication device , the method comprising:transmitting a management frame map to a plurality of wireless communication devices; andtransmitting a multi-user packet to the plurality of wireless communication devices, wherein the multi-user packet including a map index indicating, based on the management frame map, at least one of a plurality of operational parameters to be employed by at least one of the plurality of wireless communication devices when processing at least one field following the map index within the multi-user packet.2. The method of claim 1 , wherein:the multi-user packet being a multiple input multiple output (MU-MIMO) packet or an orthogonal frequency division multiple access (OFDMA) packet.3. The method of claim 1 , wherein:the multi-user packet including the map index indicating, based on the management frame map, a first of the plurality of operational parameters to be employed by a first of the wireless communication devices when processing a first field following the map index within the multi-user packet; andthe multi-user packet including the map index indicating, based on the management frame map, a second of the plurality of operational parameters to be employed by a second ...

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Номер записи: 19

14-01-2021 дата публикации

Midamble operation in a wireless local area network

Номер: US20210014018A1

Автор: Dae Kyun Lee, Hyobin YIM, Jong-Ee Oh, Min Seoung KIM, Sichan NOH, YoungJae JUNG, Yujin Noh

Принадлежит: Newracom Inc

A method is described for generating and transmitting a frame by a station. The method includes determining a bandwidth of a frame to be transmitted by the station; generating a long training field for the frame, wherein the long training field includes a set of pilot tones located at a set of subcarrier positions, wherein when the bandwidth of the frame is 10 MHz, the set of subcarrier positions include four subcarrier positions and the four subcarrier positions are set as {−21-α1,−7-α2,7+α3,21+α4} where α1, α2, α3, and α4 are odd values, and wherein when the bandwidth of the frame is 20 MHz, the set of subcarrier positions include six sub carrier positions, including {−53-β1,−25-β2,−11-β3, 11+β4,25+β5,53+β6} where β1, β2, β3, β4, β5, and β6 are odd values.

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Номер записи: 20

09-01-2020 дата публикации

USER EQUIPMENT, BASE STATION, A METHOD PERFORMED BY A USER EQUIPMENT (UE) AND A METHOD PERFORMED BY A BASE STATION

Номер: US20200015227A1

Автор: Yamada Shohei

Принадлежит:

A User Equipment (UE) configured for multi-group communications is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE detects a plurality of cells. The UE also determines to use multiple groups of one or more cells. The UE further determines a primary secondary cell (PSCell) for a non-primary cell (non-PCell) group based on UE-specific radio resource control (RRC) signaling. The UE additionally receives information using the multiple groups. 1. A User Equipment (UE) , comprising:a computer processor;a memory in electronic communication with the computer processor; a serving cell which is included in one group of the multiple groups is a primary cell (PCell),', the primary cell (PCell) is configured with a physical uplink control channel (PUCCH), and', 'the specific cell is configured with a physical uplink control channel (PUCCH),', 'the primary cell (PCell) is configured with a physical random access channel (PRACH), and', 'the specific cell is configured with a physical random access channel (PRACH),, 'a serving cell which is included in another group of the multiple groups is a specific cell,'}, 'perform a radio link monitoring in the primary cell,', 'perform a radio link monitoring in the specific cell,', 'decode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a first random access radio network temporary identifier (RA-RNTI) in a common search space on the PCell; and', wherein one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the one group are mapped to the PUCCH on the PCell; and', 'one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the another group are mapped to the PUCCH on the specific Cell., 'decode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a second random access radio network temporary identifier (RA-RNTI) in a common ...

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Номер записи: 21

18-01-2018 дата публикации

Joint space-time and fec coding in multi-mode fiber optical transmission systems

Номер: US20180019841A1

Автор: El-Mehdi AMHOUD, Ghaya Rekaya Ben-Othman, Yves Jaouen

Принадлежит: Institut Mines Telecom IMT

Embodiments of the invention provide an optical transmitter configured to transmit a data sequence over at least two spatial propagation modes through an optical transmission channel in a multi-mode optical fiber transmission system, the transmission system being associated with a predefined value of a mode-dependent loss, wherein the optical transmitter comprises: a forward error correcting code encoder ( 22 ) configured to encode said data sequence into a codeword vector by applying at least one error correcting code; a modulator ( 23 ) configured to determine a set of modulated symbols by applying a modulation scheme to said codeword vector; and a Space-Time encoder ( 24 ) configured to determine a codeword matrix by applying a Space-Time code to said set of modulated symbols.

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Номер записи: 22

17-04-2014 дата публикации

METHOD AND ARRANGEMENT IN A MOBILE COMMUNICATIONS NETWORK

Номер: US20140105320A1

Автор: Hu Yang, Liu Yin, Song Xinghua, Wang Hai, WANG JIANFENG

Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

The present invention relates to an arrangement and method to design orthogonal UE-specific reference signals so that multiple UE-specific reference signals are feasible to support non-codebook-based multi-stream beamforming/precoding. This is achieved by re-using an existing UE-specific reference signal to obtain additional UE-specific reference signals being orthogonal to the existing UE reference signal. 1. A method in a network node of a mobile communication network , wherein the network node is associated with an antenna comprising a plurality of antenna ports using non-codebook-based multi-stream beamforming , the method comprises the steps of:applying a first UE specific reference signal on a first antenna port, andreusing the first UE specific reference signal to be applied orthogonally on an antenna port.2. The method according to claim 1 , wherein the reused first UE specific reference signal are multiplexed on a second antenna port in different time-frequency resource elements than the first UE specific reference signal applied on the first antenna port.32. The method according to any of - claims 1 , wherein the reused first UE specific reference signal are applied on the first antenna port sharing the same time-frequency resource elements as the first set of UE specific reference signals.4. The method according to claim 3 , wherein the step of re-using the first UE specific reference signal further comprises:code division multiplexing the reused first UE specific reference signal in a set of resource elements.5. The method according to claim 4 , wherein the reused first UE specific reference signal are cyclic shifts of the first set of UE specific reference signals.6. The method according to claim 4 , wherein the reused first UE specific reference signal are orthogonal covers of the first set of UE specific reference signals.74. The method according to any of - claims 1 , wherein the reused first UE specific reference signal are space-frequency block ...

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Номер записи: 23

18-01-2018 дата публикации

Initial Access Channel for Scalable Wireless Mobile Communication Networks

Номер: US20180020489A1

Автор: Boumendil Sarah, Jia Ming, Le Strat Evelyne, Ma Jianglei, Tong Wen, Xu Hua, Zhang Hang, ZHU PEIYING

Принадлежит:

Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure. 130-. (canceled)31. A transmitter configured to serve a cell , the transmitter comprising:one or more processing elements; and 'transmit, via an orthogonal frequency division multiplexing (OFDM) wireless communication system having a system bandwidth, at least a synchronization channel, wherein the synchronization channel comprises a primary synchronization channel and a secondary synchronization channel, wherein the primary synchronization channel is modulated by at least one primary synchronization sequence, and wherein the at least one primary synchronization sequence is a sequence selected from a set of two or more possible primary synchronization sequences common to multiple cells of a wireless communications system.', 'one or more memories having program instructions stored thereon that are executable by the one or more processing elements to cause the transmitter to32. The transmitter of claim 31 , wherein the secondary synchronization channel is transmitted three OFDM symbols prior to each transmission of the primary synchronization channel.33. The transmitter of claim 31 , wherein each transmission of the secondary synchronization channel consists of subcarriers modulated by two secondary synchronization sequences determined by a cell identifier of the cell.34. The transmitter of claim 33 , wherein subcarriers modulated by the two secondary synchronization sequences are interleaved in an ...

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Номер записи: 24

25-01-2018 дата публикации

Method and apparatus for communication based on common feedback information in multiple antenna system

Номер: US20180026694A1

Автор: Heejeong Cho, Hyeyoung Choi, Hyunsoo Ko, Ilmu BYUN, Kungmin Park

Принадлежит: LG ELECTRONICS INC

Disclosed is method and apparatus for communication using common feedback information in multiple antenna system. According to this method, a receiving side device receives rank Ni signals from a transmitting side device with a first type multiple antenna transmission scheme at a first receiving opportunity, and receives rank Nj signals from the transmitting side device with a second type multiple antenna transmission scheme at a second receiving opportunity, where Ni>Nj. The feedback information of this method is common feedback information comprising a combination of a first feedback information for the rank Ni signals and a second feedback information for the rank Nj signals. For this, the first type multiple antenna transmission scheme uses the second type multiple antenna transmission scheme for transmission of rank Nj signals among the rank Ni signals received at the first receiving opportunity.

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Номер записи: 25

29-01-2015 дата публикации

Method and apparatus for generating a phy header field

Номер: US20150030101A1

Автор: Hongyuan Zhang, Sudhir Srinivasa

Принадлежит: MARVELL WORLD TRADE LTD

In a method of generating a field of a physical layer (PHY) header of a data unit, bits to be included in the field are generated and the bits are duplicated to generate duplicated bits. First modulation data is generated based on the duplicated bits. The first modulation data corresponds to a first set of orthogonal frequency domain multiplexing (OFDM) sub-carriers corresponding to a first frequency band. Second modulation data is generated using the first modulation data. The second modulation data corresponds to a second set of OFDM sub-carriers corresponding to a second frequency band. One or more signals i) that span the first frequency band and the second frequency band and ii) that correspond to field of the PHY header are generated. Generating the one or more signals includes performing a frequency domain to time domain conversion based on the first modulation data and the second modulation data.

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Номер записи: 26

08-02-2018 дата публикации

METHOD OF CONTROLLING A COMMUNICATIONS LINK

Номер: US20180041292A1

Автор: BAINES Steven John

Принадлежит:

The present invention is directed to a method of controlling a communications link and apparatus configured to perform this method. This invention is particularly related to but in no way limited to MIMO (multiple inputs multiple outputs) wireless communications systems. The method comprises the steps of determining at the receiver the quality of the communications link and based on this, selecting a group of transmission parameters and an element from this group. These selections are then communicated to the transmitter. The transmission parameter may be the transmission configuration such as the modulation and coding scheme. The invention minimises the required feedback signalling from the receiver to the transmitter by exploiting temporal correlation of the parameter being controlled, whilst allowing rapid selection of the parameter. 1. An apparatus configurable for operation in a user equipment (UE) , the apparatus comprising:one or more processors; and receiving signals from a base station of a wireless network;', 'determining a quality of a communication link based on the received signals;', 'selecting a predefined group of parameters and at least one parameter from the selected predefined group of parameters based on the determined quality of the communication link, the predefined group of parameters comprising an element corresponding to a modulation coding scheme (MCS);', 'sending to the base station an identification of the at least one selected parameter from the selected predefined group of parameters; and', 'sending to the base station an identification of the selected predefined group of parameters,, 'a memory communicatively coupled to the one or more processors and storing instructions that, when executed on the one or more processors, cause the UE to perform actions includingwherein the selected predefined group of parameters is selected from a plurality of predefined groups of parameters, andwherein at least one predefined group of parameters ...

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Номер записи: 27

13-02-2020 дата публикации

TRANSMISSION AND RECEPTION SIGNAL PROCESSOR AND METHOD

Номер: US20200052851A1

Автор: Matsuoka Akihiko, MURAKAMI Yutaka, ORIHASHI Masayuki

Принадлежит:

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. 1. A transmission apparatus comprising:circuitry, which, in operation, maps reference signals in first subcarriers at a first time and in second sub-carriers at a second time for first Orthogonal Frequency Division Multiplexing (OFDM) signals, wherein no signal is mapped in the second sub-carriers at the first time and in the first sub-carriers at the second time for the first OFDM signals, andwhich, in operation, maps reference signals in the second sub-carriers at the first time and in the first sub-carriers at the second time for second OFDM signals, wherein no signal is mapped in the first sub-carriers at the first time and in the second sub-carriers at the second time for the second OFDM signals; anda transmitter, which is coupled to the circuitry and which, in operation, transmits the first OFDM signals and the second OFDM signals from different antennas.2. The transmission apparatus according to claim 1 , wherein data is mapped to third sub- ...

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Номер записи: 28

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: 29

20-02-2020 дата публикации

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS LAN SYSTEM AND APPARATUS THEREFOR

Номер: US20200059391A1

Автор: Choi Jinsoo, Kim Jinmin, PARK Sungjin, YUN Sunwoong

Принадлежит: LG ELECTRONICS INC.

The present specification presents a method for transmitting and receiving, by a station, a signal in a wireless LAN (WLAN) system supporting eight space time streams at most, and an apparatus therefor. More particularly, the present specification presents a method for transmitting and receiving a signal including a pilot sequence for 3-channel bonding or 4-channel bonding per each space time stream when a station transmits and receives a signal over a channel in which three or four channels are bonded, and an apparatus therefor. 1. A method in a wireless LAN (WLAN) system , the method comprising:generating, by a station (STA) supporting a plurality of space time streams (STSs), a transmission pilot sequence having 56 elements based on a first pilot sequence having 16 elements and a second pilot sequence having 12 elements, wherein the first pilot sequence is selected among first candidate sequences based on an STS used for the transmission pilot sequence, wherein the second pilot sequence is selected among second candidate sequences based on the STS used for the transmission pilot sequence, wherein the first candidate sequences are mutually orthogonal, and wherein the second candidate sequences are mutually orthogonal; andtransmitting, by the STA, a wireless signal including the transmission pilot sequence through three contiguous wireless channels.2. The method of claim 1 , wherein the three contiguous wireless channels include three contiguous 2.16 GHz channels3. The method of claim 1 , wherein a maximum number of the plurality of STSs is eight (8).4. The method of claim 1 , wherein the first pilot sequence and the second pilot sequence are repeated in the transmission pilot sequence.5. The method of claim 1 , wherein the 56 elements of the transmission pilot sequence are mapped to 56 subcarriers claim 1 , the 16 elements of the first pilot sequence are mapped to 16 subcarriers claim 1 , and the 12 elements of the first pilot sequence are mapped to 12 subcarriers ...

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Номер записи: 30

01-03-2018 дата публикации

Scattered Pilot Pattern And Channel Estimation Method For MIMO-OFDM Systems

Номер: US20180062896A1

Автор: Jia Ming, Ma Jianglei, Tong Wen, ZHU PEIYING

Принадлежит: BlackBerry Limited

A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain. 112-. (canceled)13. A method of transmitting symbols using Orthogonal Frequency Division Multiplexing (OFDM) frames at an OFDM base station using a plurality of processing paths of an OFDM transmitter to transmit OFDM signals , the OFDM frames having a time domain and a frequency domain , each of the OFDM frames comprising a plurality of OFDM symbols in the time domain and a plurality of sub-carriers in the frequency domain , the method comprising the steps of:for a first processing path of the OFDM transmitter, transmitting scattered pilot symbols in a scattered pattern in time-frequency by transmitting a first set of pilot symbols in a first pattern in time-frequency and transmitting a second set of pilot symbols in a second pattern in time-frequency at same frequencies as the first pattern, offset by one OFDM symbol in the time domain; andfor a second processing path of the OFDM transmitter, transmitting scattered pilot symbols using the scattered pattern.14. The method of claim 13 , wherein at least one of the OFDM frames includes a preamble.15. The method of claim 13 , wherein transmitting the ...

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Номер записи: 31

09-03-2017 дата публикации

Method for feeding back channel state in wireless communication system and device therefor

Номер: US20170070914A1

Автор: Dongguk Lim, Eunsung Park, Hangyu Cho, Jeongki Kim, Jinmin Kim, Jinsoo Choi, Jinyoung Chun, Kiseon Ryu

Принадлежит: LG ELECTRONICS INC

Disclosed herein is an operating method of a station (STA) in a wireless LAN (WLAN) system. The method includes receiving a downlink (DL) physical protocol data unit (PPDU) and sending an uplink (UL) PPDU as a response to the DL PPDU. The DL PPDU may include at least one MAC protocol data unit (MPDU) and the at least one MPDU may include a first high efficiency (HE) control field. The UL PPDU may include at least one MAC protocol data unit (MPDU) and the at least one MPDU may include a second high efficiency (HE) control field. The each of the first and second HE control fields corresponds to an HT control field and comprises a plurality of aggregated HE control subfield. The HT control field includes VHT subfield value set to “1” and HE subfield value set to “1”.

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Номер записи: 32

19-03-2015 дата публикации

Method and arrangement for pilot pattern based control signaling in mimo systems

Номер: US20150078311A1

Автор: Jung-Fu Cheng, Karl J. Molnar, Leonid Krasny, Stephen Grant, Yi-Pin Eric Wang

Принадлежит: Telefonaktiebolaget LM Ericsson AB

A radio base station, user equipment (UE), and method of control signaling in wireless communication systems. Control information is transferred from a base station to at least one UE, via a plurality of common pilot channels. A set of unique pilot sequences is predefined, and the base station assigns specific pilot sequences from the set of pilot sequences to specific common pilot channels, forming a pilot sequence assignment pattern representing specific control information. The UE, having knowledge of the relations between pilot sequence assignment patterns and control information, interprets the received pilot sequence assignment pattern as specific control information. The method is particularly well suited for broadcast type control information.

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Номер записи: 33

11-03-2021 дата публикации

Using rate buckets

Номер: US20210076263A1

Автор: James Randolph Winter Lepp, Michael Peter Montemurro, Stephen McCann

Принадлежит: BlackBerry Ltd

In some examples, a wireless device selects a selected rate bucket of a plurality of different rate buckets, where a rate bucket of the plurality of different rate buckets comprises a plurality of coding rates. A higher-level layer in the wireless device sends, to a lower-level layer in the wireless device, an indication of the selected rate bucket. The lower-level layer uses the selected rate bucket in a wireless communication by the wireless device.

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Номер записи: 34

16-03-2017 дата публикации

Method for feeding back channel state in wireless communication system and device therefor

Номер: US20170079027A1

Автор: Dongguk Lim, Eunsung Park, Hangyu Cho, Jeongki Kim, Jinmin Kim, Jinsoo Choi, Jinyoung Chun, Kiseon Ryu

Принадлежит: LG ELECTRONICS INC

Disclosed herein is a sounding method of a station (STA) for sending feedback information about a downlink (DL) channel state in a wireless LAN (WLAN) system. The sounding method includes receiving an NDP announcement (NDPA) frame providing notification of the transmission of a null data packet (NDP) frame; receiving the NDP frame; receiving a trigger frame comprising resource allocation information allocated to the STA; generating feedback information using the NDP frame; and sending a feedback frame comprising feedback information through uplink (UL) multi-user (MU) transmission using a frequency resource indicated by the resource allocation information. The feedback information may be generated in a frequency granularity (FG) unit with respect to a transmission bandwidth having a size smaller than or equal to the size of a transmission bandwidth of the NDP frame.

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Номер записи: 35

19-06-2014 дата публикации

Space-time/space-frequency coding for multi-site and multi-beam transmission

Номер: US20140169505A1

Автор: David Keith Roberts, Matthew Peter John Baker, Timothy James Moulsley, Xusheng Wei

Принадлежит: Koninklijke Philips NV

The present invention relates to space-time or space-frequency coding in cellular systems. The same data is transmitted from different antennas with different coverage areas, corresponding to different cells. The different data streams have different parts of the space-time block codes applied. A mobile terminal can combine the different parts of the space-time block codes in different received signals. This provides better performance than the known techniques for single frequency networks. The invention can also be applied to antennas with different coverage areas from the same site, and different beams formed with antenna arrays.

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Номер записи: 36

29-03-2018 дата публикации

DIFFERENTIAL MIMO TRANSCEIVER

Номер: US20180091261A1

Автор: Brady John H., Sayeed Akbar M.

Принадлежит:

A receiver detects a plurality of information symbols. A first signal and a second signal are received from a first transmitted signal and a second transmitted signal, respectively, transmitted by a first plurality of antennas and received by a second plurality of antennas connected to the receiver. The second signal is received after the first signal. The receiver spatially filters the first signal using a spatial filter matrix. The receiver computes a conjugate of the first filtered signal to define a conjugate first signal, and spatially filters a second signal using the spatial filter matrix. The receiver computes a Hadamard product of the first filtered signal and the conjugate first signal to define a differential measurement signal. The receiver detects the plurality of information symbols from the differential measurement signal. 1. A non-transitory computer-readable medium having stored thereon computer-readable instructions that when executed by a computing device cause the computing device to:spatially filter a first signal using a spatial filter matrix to define a first filtered signal, wherein the first signal is a result of a first transmitted signal transmitted by a first plurality of antennas and received by a second plurality of antennas connected to the receiver;compute a conjugate of the first filtered signal to define a conjugate first signal;spatially filter a second signal using the spatial filter matrix to define a second filtered signal, wherein the second signal is a result of a second transmitted signal transmitted by the first plurality of antennas and received by the second plurality of antennas connected to the receiver, wherein the second signal is received after the first signal;compute a Hadamard product of the first filtered signal and the conjugate first signal to define a differential measurement signal; anddetect a plurality of information symbols from the differential measurement signal.2. The non-transitory computer-readable ...

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Номер записи: 37

05-05-2022 дата публикации

SYSTEMS AND METHODS FOR SMART HARQ FOR WIFI

Номер: US20220140952A1

Автор: Ghosh Monisha, Lou Hanqing, Olesen Robert, Oteri Oghenekome, Shah Nirav B., Wang Xiaofei, Xia Pengfei, Zhang Guodong

Принадлежит: INTERDIGITAL PATENT HOLDINGS, INC.

Systems, methods, and instrumentalities are provided to implement a method of communicating a feedback in a wireless local area network (WLAN). A WLAN device may receive a data frame with a hybrid automatic repeat request (HARQ) data indicator in a frame header. The WLAN device may send an acknowledgement frame when the data frame is correctly received and decoded. The WLAN device may send a negative acknowledgement frame when the data frame is not correctly received and decoded.

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Номер записи: 38

14-04-2016 дата публикации

Method for transmitting a signal via a power line network, transmitter, receiver, power line communication modem and power line communication system

Номер: US20160105217A1

Автор: Andreas Schwager, Daniel Schneider, Lothar Stadelmeier

Принадлежит: Sony Corp

A method for transmitting signals over a power line network, wherein within the power line network at least one transmitter and at least one receiver communicate via at least two channels, each channel including a respective feeding port of at least one transmitter and the respective receiving port of the at least one transmitter and transmitter including at least two feeding ports. The method: determines a channel characteristic of each of the channels; applies a feeding port selection criterion based on the channel characteristic; and selects an excluded feeding port among the at least two feeding ports based on the feeding port selection criterion, wherein the excluded feeding port is not used during further communication. A corresponding power line communication modem can implement the method.

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Номер записи: 39

14-04-2016 дата публикации

System and Method for Space-Time Block Coded Communications

Номер: US20160105261A1

Автор: Aboul-Magd Osama, Suh Jung Hoon

Принадлежит:

A method for wireless communications includes encoding a training sequence thereby producing an encoded training sequence, placing the encoded training sequence in a first part of a multi-part preamble, and transmitting the multi-part preamble using a first transmit antenna and a second transmit antenna. 1. A method for wireless communications , the method comprising:encoding, by a transmission point, a training sequence thereby producing an encoded training sequence;placing, by the transmission point, the encoded training sequence in a first part of a multi-part preamble; andtransmitting, by the transmission point, the multi-part preamble on at least two streams using a first transmit antenna and a second transmit antenna.2. The method of claim 1 , wherein the training sequence comprises a legacy long training sequence.3. The method of claim 1 , further comprising placing an encoded legacy signal sequence in the first part of the multi-part preamble.4. The method of claim 3 , wherein the encoded legacy signal sequence comprises an encoded legacy signal sequence.5. The method of claim 3 , further comprising placing a duplicate of the encoded signal sequence in the first part of the multi-part preamble.6. The method of claim 5 , further comprising placing a guard interval between the encoded signal sequence and the duplicate of the encoded signal sequence in the first part of the multi-part preamble.7. The method of claim 1 , wherein the multi-part preamble further comprises a second part including two space-time streams.8. A method for wireless communications claim 1 , the method comprising:space-time block code (STBC) encoding, by a transmission point, a signal thereby producing two space-time streams;placing, by the transmission point, the two space-time streams in a first part of a multi-part preamble; andtransmitting, by the transmission point, the multi-part preamble.9. The method of claim 8 , wherein the signal further comprises at least one of a high ...

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Номер записи: 40

23-04-2015 дата публикации

Signal receiving method and electronic device

Номер: US20150110229A1

Автор: Young-Ju Kim

Принадлежит: SAMSUNG ELECTRONICS CO LTD

An electronic device including a first transceiver configured to process a first carrier, a second transceiver configured to process a second carrier, a switch, a baseband processor configured to process a first baseband signal and a second baseband signal, which are processed respectively by the first transceiver and the second transceiver, an antenna connected through the switch in association with some of a plurality of reception paths with respect to the first carrier, and a reception path configured to provide the second transceiver with the first carrier received via the antenna connected through the switch to the second transceiver.

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Номер записи: 41

08-04-2021 дата публикации

Apparatus, system and method of communicating a transmission according to a space-time encoding scheme

Номер: US20210105091A1

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

Принадлежит: Intel Corp

For example, a wireless station may be configured to map a plurality of data symbols to Orthogonal Frequency-Division Multiplexing (OFDM) symbols in a plurality of spatial (space-time) streams, to map a plurality of modulated pilot sequences to the OFDM symbols according to a pilot mapping scheme, and to transmit an OFDM Multiple-Input-Multiple-Output (MIMO) transmission based on the plurality of spatial streams.

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Номер записи: 42

02-06-2022 дата публикации

Initial Access Channel for Scalable Wireless Mobile Communication Networks

Номер: US20220174754A1

Автор: Boumendil Sarah, Jia Ming, Le Strat Evelyne, Ma Jianglei, Tong Wen, Xu Hua, Zhang Hang, ZHU PEIYING

Принадлежит:

Physical layer structures and access schemes for use in such networks are described and in particular initial access channel (IACH) structures are proposed. A spectrum efficient downlink (DL) IACH design supports different types of User Equipment (UE) capabilities and different system bandwidths. An IACH includes the synchronization channel (SCH) and broadcast-control channel (BCH). A non-uniform SCH for all system bandwidths is provided, as well as scalable bandwidth BCH depending on system bandwidth. An initial access procedure is provided, as well as an access procedure. 130.-. (canceled)31. A method , comprising:receiving, by a mobile device, a first orthogonal frequency-division multiplexing (OFDM) symbol carrying at least one primary synchronization sequence and a second OFDM symbol carrying at least one secondary synchronization sequence;wherein the at least one primary synchronization sequence is selected from a set of two or more possible primary synchronization sequences; andwherein the second symbol carrying the at least one secondary synchronization sequence is transmitted immediately following a third OFDM symbol carrying a broadcast channel (BCH), and two OFDM symbols after transmission of the first symbol carrying the at least one primary synchronization sequence.32. The method of claim 31 , wherein the set of two or more possible primary synchronization sequences is common to multiple cells.33. The method of claim 31 , wherein the broadcast channel is transmitted in a symbol at the end of a repeated frame.34. The method of claim 33 , wherein the frame includes a single symbol for the at least one primary synchronization sequence and multiple symbols for the at least one secondary synchronization sequence.35. The method of claim 31 , wherein a secondary synchronization channel for the at least one secondary synchronization sequence is modulated by at least one secondary synchronization sequence that is cell-specific.36. The method of claim 31 , ...

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Номер записи: 43

30-04-2015 дата публикации

METHOD FOR TRANSMITTING CONTROL AND TRAINING SYMBOLS IN MULTI-USER WIRELESS COMMUNICATION SYSTEM

Номер: US20150117429A1

Автор: Lee Sok-Kyu, LEE Yu-Ro, SON Jung-Bo

Принадлежит:

The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result. 1. A method of transmitting a frame in a wireless local area network , the method comprising:generating a legacy short training field (STF) used for at least one receiver to estimate an automatic gain control and a coarse frequency offset;generating a legacy long training field (LTF) used for the at least one receiver to estimate a fine frequency offset;generating a first Very High Throughput (VHT) control field including common control information which is common to each receiver;generating a VHT STF used for improving automatic gain control estimation in a wireless transmission;generating a VHT LTF used for estimating a wireless channel;generating a second VHT control field including specific control information specific to each receiver;generating a physical layer protocol data unit (PPDU) including the legacy STF, the legacy LTF, the first VHT control field, the VHT STF, the VHT LTF, the second VHT control field and a data field; andtransmitting the PPDU to the at least one receiver,wherein the specific control information includes information indicating a length of the data field for ...

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Номер записи: 44

13-05-2021 дата публикации

Communication Devices, Systems, Software and Methods employing Symbol Waveform Hopping

Номер: US20210144033A1

Автор: Jerrold Prothero

Принадлежит: Astrapi Corp

Systems, devices, and methods of the present invention facilitate secure communication by altering the set of symbol waveforms that may be in use in particular symbol times defined herein as Symbol Waveform Hopping. SWH may be enabled by selecting two or more modulation formats that have sufficiently comparable communication performance (e.g., occupied bandwidth and signal power efficiency), but characterized by symbol waveform alphabet that include different symbol waveform, so that the overall transmission/communication performance of data stream in a signal transmission channel of the system is not significantly affected by switching between modulation formats. Some or all of the symbol waveforms in each alphabet may not be present in other alphabets.

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Номер записи: 45

04-05-2017 дата публикации

Transmission Apparatus and Method, and Reception Apparatus and Method

Номер: US20170126446A1

Автор: Akihiko Matsuoka, Kiyotaka Kobayashi, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Panasonic Intellectual Property Corp of America

Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. As modulated signal B, modulated symbols S2(i) and S2(i+1) obtained from different data are transmitted at time i and time i+1 respectively. In contrast, as modulated signal A, modulated symbols S1(i) and S1(i)′ obtained by changing the signal point arrangement of the same data are transmitted at time i and time i+1 respectively. As a result the reception quality can be changed intentionally at time i and time i+1, and therefore using the demodulation result of modulated signal A of a time when the reception quality is good enables both modulated signals A and B to be demodulated with good error rate performances.

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Номер записи: 46

25-04-2019 дата публикации

Scattered Pilot Pattern And Channel Estimation Method For MIMO-OFDM Systems

Номер: US20190123949A1

Автор: Jia Ming, Ma Jianglei, Tong Wen, ZHU PEIYING

Принадлежит: BlackBerry Limited

A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain. 112-. (canceled)13. A method of receiving symbols using Orthogonal Frequency Division Multiplexing (OFDM) frames at an OFDM receiver having a plurality of processing paths to receive OFDM signals , the OFDM frames having a time domain and a frequency domain , each of the OFDM frames comprising a plurality of OFDM symbols in the time domain and a plurality of sub-carriers in the frequency domain , the method comprising the steps of:for a first processing path of the OFDM receiver, receiving scattered pilot symbols in a scattered pattern in time-frequency by receiving a first set of pilot symbols in a first pattern in time-frequency and receiving a second set of pilot symbols in a second pattern in time-frequency at same frequencies as the first pattern, offset by one OFDM symbol in the time domain; andfor a second processing path of the OFDM receiver, receiving scattered pilot symbols using the scattered pattern.14. The method of claim 13 , wherein at least one of the OFDM frames includes a preamble.15. The method of claim 13 , wherein receiving the scattered pilot symbols in the scattered pattern in ...

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Номер записи: 47

16-04-2020 дата публикации

SYSTEMS AND METHODS FOR SMART HARQ FOR WIFI

Номер: US20200119859A1

Автор: Ghosh Monisha, Lou Hanqing, Olesen Robert L., Oteri Oghenekome, Shah Nirav B., Wang Xiaofei, Xia Pengfei, Zhang Guodong

Принадлежит: INTERDIGITAL PATENT HOLDINGS, INC.

Systems, methods, and instrumentalities are provided to implement a method of communicating a feedback in a wireless local area network (WLAN). A WLAN device may receive a data frame with a hybrid automatic repeat request (HARQ) data indicator in a frame header. The WLAN device may send an acknowledgement frame when the data frame is correctly received and decoded. The WLAN device may send a negative acknowledgement frame when the data frame is not correctly received and decoded. 1. A method associated with a data transmission , the method comprising:receiving, by a first station, a first transmission from a second station, wherein the first transmission comprises first data, and wherein the first transmission is associated with an 802.11 exchange; and when the first station determines that the first data was received correctly, the combination packet comprises the data part and an ACK, and', 'when the first station determines that the first data was not received correctly, the combination packet comprises the data part and a NACK, wherein the combination packet comprises a frame comprising a type field and a subtype field, and wherein a value of the type field and a value of the subtype field are set to indicate a NACK., 'sending a second transmission associated with the 802.11 exchange to the second station, wherein the second transmission comprises a combination packet, and wherein the combination packet comprises a data part and an ACK/NACK part, wherein2. The method of claim 1 , further comprising receiving an indication that combining of data and HARQ information is configured.3. The method of claim 2 , wherein the indication is included in a HARQ capability element.4. The method of claim 1 , wherein when the first station determines that the first transmission is for the first station and that a data part associated with the first transmission cannot be decoded claim 1 , the first station immediately sends the second transmission to the second station.5. The ...

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Номер записи: 48

12-05-2016 дата публикации

Transmitting Node, Receiving Node and Methods Performed Therein

Номер: US20160134398A1

Автор: Mårten Sundberg, Miguel Lopez, Stefan Eriksson Löwenmark

Принадлежит: Telefonaktiebolaget LM Ericsson AB

Embodiments herein relate to a method performed in a transmitting node ( 12 ) for transmitting at least one burst of energy to one or more receiving nodes ( 10,13 ) in a wireless communication network ( 1 ). The transmitting node ( 12 ) comprises a number of transmit antennas being more than one and wherein the at least one burst of energy carries a payload for one or more receiving nodes ( 10,13 ). The transmitting node ( 12 ) determines a shift, for one or more transmit antennas, in one or more signal characteristics of a burst of energy of the at least one burst of energy. The shift indicates one or more additional information bits, in addition to the payload, for a first receiving node ( 10 ). The transmitting node further transmits, over the one or more transmit antennas, the burst of energy of the at least one burst of energy with the shift in the signal characteristic carrying the payload to one or more receiving nodes ( 10,13 ) in the wireless communication network ( 1 ).

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Номер записи: 49

10-05-2018 дата публикации

Dual Receive Processing In Wireless Communications

Номер: US20180131399A1

Автор: Burnet Craig, Low Tze-Ping, MOON JANGWOOK

Принадлежит:

A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal. 1. An apparatus , comprising:an antenna configured to receive an incoming signal;a plurality of receive processing circuits comprising at least a first receive processing circuit and a second receive processing circuit, each of the plurality of receive processing circuits coupled to the antenna and configured to receive the incoming signal from the antenna and process the incoming signal to produce a respective processing result;a determination circuit configured to receive the processing results from the plurality of receive processing circuits and generate a determination output, the determination output comprising either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing circuits or a weighted combination of more than one respective processing result from more than one receive processing circuit of the plurality of receive processing circuits; anda decoder configured to receive the determination output from the determination circuit and decode the determination output to provide a decoded signal, a plurality of weight ...

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Номер записи: 50

10-05-2018 дата публикации

DUAL RECEIVE PROCESSING IN WIRELESS COMMUNICATIONS

Номер: US20180131400A1

Автор: Burnet Craig, Low Tze-Ping, MOON JANGWOOK

Принадлежит:

A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal. 1. An apparatus , comprising:an antenna configured to receive an incoming signal;a plurality of receive processing circuits comprising at least a first receive processing circuit and a second receive processing circuit, each of the plurality of receive processing circuits coupled to the antenna and configured to receive the incoming signal from the antenna and process the incoming signal to produce a respective processing result;a determination circuit configured to receive the processing results from the plurality of receive processing circuits and generate a determination output, the determination output comprising either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing circuits or a weighted combination of more than one respective processing result from more than one receive processing circuit of the plurality of receive processing circuits; anda decoder configured to receive the determination output from the determination circuit and decode the determination output to provide a decoded signal, a plurality of decoding metric ...

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Номер записи: 51

02-05-2019 дата публикации

USER SEQUENCE TRANSMISSION METHOD, NETWORK DEVICE, AND TERMINAL DEVICE

Номер: US20190132084A1

Автор: LI Rong, RONG Lu, WANG Jian, YU Rongdao, ZHANG Huazi

Принадлежит:

This application discloses a user sequence transmission method, a network device, and a terminal device. The method includes: sending, by a network device, first signaling to a terminal device, where the first signaling includes first information indicating a quantity of user sequences in a first user sequence space, and the user sequences in the first user sequence space include a universal set of user sequences used by the terminal device served by the network device; receiving, by the network device, a first user sequence sent by the terminal device based on the first information; and performing, by the network device, user detection and/or communication parameter estimation based on the first user sequence. 1. A user sequence transmission method , comprising:sending, by a network device, first signaling to a terminal device, wherein the first signaling comprises first information indicating a quantity of user sequences in a first user sequence space, wherein the user sequences in the first user sequence space comprise a universal set of user sequences used by the terminal device served by the network device;receiving, by the network device, a first user sequence sent by the terminal device based on the first information; andperforming, by the network device, user detection and/or communication parameter estimation based on the first user sequence.2. The method according to claim 1 , wherein the first information comprises an index indicating a configuration of the first user sequence space claim 1 , the index is agreed on in advance in the network device and the terminal device claim 1 , and the configuration of the first user sequence space comprises the quantity of user sequences in the first user sequence space.3. The method according to claim 2 , wherein the configuration of the first user sequence space further comprises at least one of a type of the user sequence in the first user sequence space claim 2 , a space level of the first user sequence space ...

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Номер записи: 52

03-06-2021 дата публикации

INTEGRATED CIRCUIT

Номер: US20210167836A1

Автор: Kimura Tomohiro, MURAKAMI Yutaka, Ouchi Mikihiro

Принадлежит:

A transmission apparatus includes M signal processors that respectively generate modulated signals directed to M reception apparatuses, M being an integer equal to or greater than 2, and an antenna section. Each signal processor modulates a first bit sequence made up of two bits to generate a first modulated signal and a second modulated signal, and modulates a second bit sequence made up of other two bits to generate a third modulated signal and a fourth modulated signal, in a case of transmitting multiple streams to a corresponding one of the M reception apparatuses. The antenna section includes a first antenna that transmits the first modulated signal and the third modulated signal and a second antenna that transmits the second modulated signal and the fourth modulated signal. At least either the signals transmitted from the first antenna or the signals transmitted from the second antenna are phase-changed signals. 1. An integrated circuit comprising:control circuitry which, in operation, controls:when a phase change before precoding is enabled,modulating a bit sequence to generate a symbol sequence to which a first phase change before precoding is applied, an amount of the first phase change before precoding being cyclically switched; andperforming precoding on the symbol sequence to generate a first precoded signal and a second precoded signal, wherein a second phase change is applied to the second precoded signal; andwhen a phase change before precoding is not enabled,modulating a bit sequence to generate a first symbol sequence and a second symbol sequence; andperforming precoding on the first symbol sequence and the second symbol sequence to generate a third precoded signal and a fourth precoded signal, to which a third phase change and a fourth phase change are applied, respectively; andtransmission circuitry, which is coupled to the control circuitry and which, in operation, controls transmission of the first precoded signal and the second precoded signal ...

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Номер записи: 53

03-06-2021 дата публикации

METHODS AND APPARATUS FOR TRANSMITTING MODULATION SIGNALS

Номер: US20210167915A1

Автор: Matsuoka Akihiko, MURAKAMI Yutaka, ORIHASHI Masayuki

Принадлежит:

A plurality of multicarrier signals is generated. Each of the plurality of multicarrier signals includes a pilot symbol sequence at a same temporal point in each multicarrier signal. Each pilot symbol sequence includes a plurality of pilot symbols with non-zero amplitude. The pilot symbol sequences are orthogonal to each other at the same temporal point. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of multicarrier signals to be transmitted. The plurality of multicarrier signals are transmitted in an identical frequency band from a plurality of antennas. The plurality of antennas includes two, three, or four antennas. 1. A method of transmitting multicarrier signals comprising:generating a plurality of multicarrier signals, each of the plurality of multicarrier signals including a pilot symbol sequence at a same temporal point in each multicarrier signal, and each pilot symbol sequence having a plurality of pilot symbols with non-zero amplitude,wherein the pilot symbol sequences are orthogonal to each other at the same temporal point, andwherein a quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of multicarrier signals to be transmitted; andtransmitting, in an identical frequency band, the plurality of multicarrier signals, including respective independent transmission data, from a plurality of antennas,wherein the plurality of antennas comprises a number of antennas that is greater than or equal to a number of independent multicarrier signals.2. The method of claim 1 , wherein the plurality of pilot symbols are for estimating a frequency offset and/or for synchronization.3. The method of claim 1 , wherein the plurality of pilot symbols each include real or complex numbers.4. The method of claim 1 , wherein the plurality of pilot symbols includes four claim 1 , eight claim 1 , or more pilot symbols.5. ...

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Номер записи: 54

18-05-2017 дата публикации

Data Transmission Method and Apparatus

Номер: US20170141829A1

Автор: Deli Qiao, Lei Wang, YE Wu

Принадлежит: Huawei Technologies Co Ltd

A data sending method including receiving uplink data or a pilot sent by user equipment by using an uplink subframe, performing beam characteristic design according to at least one of the uplink data or the pilot, generating beam characteristic information, determining a precoding mode according to the beam characteristic information, and performing precoding processing on to-be-sent data according to the determined precoding mode where the precoding mode includes at least one of a space-time based precoding mode or a space-frequency based precoding mode and sending precoded to-be-sent data to the user equipment. The precoding mode can be flexibly selected according to at least one of uplink data or a pilot sent by user equipment.

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Номер записи: 55

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: 56

26-05-2016 дата публикации

ROBUST SYMBOL TRANSMISSION AND RECEPTION METHOD USING HIERARCHICAL MODULATION IN WIRELESS ACCESS SYSTEM

Номер: US20160149670A1

Автор: CHOI Kukheon, Chung Jaehoon, Kim Jinmin, Kim Kitae, NOH Kwangseok

Принадлежит: LG ELECTRONICS INC.

The present invention provides hierarchical modulation methods for robust symbol transmission and reception in a wireless access system, and devices supporting same. A method for transmitting a hierarchically modulated (HM) symbol in a wireless access system, according to an embodiment of the present invention, comprises the steps of: generating a first symbol; generating a second symbol; generating an HM symbol by combining the first symbol and the second symbol; and transmitting the HM symbol, wherein the first symbol can be generated by means of a spatial multiplexing (SM) technique, a beam-forming technique, or a space-time coding technique and the second symbol can be generated by means of a spatial multiplexing (SM) technique, a beam-forming technique, or a space-time coding technique. 1. A method for transmitting hierarchically modulated (HM) symbols in a wireless access system , the method comprising the steps of:configuring a first symbol;configuring a second symbol;configuring the HM symbols by combining the first symbol and the second symbol; andtransmitting the HM symbols,wherein the first symbol is configured by applying a spatial multiplexing (SM) scheme, a beamforming scheme, or a space time coding scheme, and the second symbol is configured by applying a spatial multiplexing (SM) scheme, a beamforming scheme, or a space time coding scheme.2. The method according to claim 1 , wherein a scheme applied to the first symbol and a scheme applied to the second symbol are different from each other.3. The method according to claim 2 , wherein information bits modulated to the first symbol are different from information bits modulated to the second symbol.4. The method according to claim 2 , wherein information bits modulated to the first symbol are same as information bits modulated to the second symbol.5. The method according to claim 2 , wherein a receiver for information bits modulated to the first symbol is different from a receiver for information bits ...

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Номер записи: 57

30-04-2020 дата публикации

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WLAN SYSTEM AND DEVICE THEREFOR

Номер: US20200136871A1

Автор: Choi Jinsoo, Kim Jinmin

Принадлежит: LG ELECTRONICS INC.

The present specification discloses a method for transmitting and receiving a signal in a WLAN system, by a station, and a device therefor. More particularly, the present specification discloses, when a station transmits and receives a signal through a channel on which one or two channels are bonded, a method for constituting an enhanced directional multi gigabit (EDMG) short training field (STF) for an orthogonal frequency division multiplexing (OFDM) packet, and transmitting and receiving a signal comprising the constituted EDMG STF field, and a device therefor. 1. A method in a wireless local area network (WLAN) system , comprising:generating, by a first station (STA), a short training field (STF) signal based on a STF sequence,wherein the STF signal is generated for an orthogonal frequency division multiplexing (OFDM) mode; andtransmitting a physical protocol data unit (PPDU) including the STF signal to a second STA based on at least one 2.16 GHz channel,wherein the STF sequence includes an A sequence and a B sequencewherein the STF sequence is configured based on {A, 0, 0, 0, B},wherein the STF sequence is configured for at least one space time stream (STS),wherein a maximum number of the at least one STS is eight (8), andwherein the A sequence and the B sequence are configured based on the at least one 2.16 GHz channel and an index of the at least one STS.2. The method of claim 1 , wherein the at least one 2.16 GHz channel includes a number of contiguous 2.16 GHz channels.3. The method of claim 1 , each of the A sequence and the B sequence has 176 elements claim 1 , and the STF sequence is configured for a single 2.16 GHz channel.4. The method of claim 3 , wherein the A sequence for a first index of the at least one STS is configured based on {0 claim 3 , 1 claim 3 , 0 claim 3 , 0 claim 3 , 0 claim 3 , +j claim 3 , 0 claim 3 , 0 claim 3 , 0 claim 3 , +j claim 3 , 0 claim 3 , 0 claim 3 , 0 claim 3 , −1 claim 3 , 0 claim 3 , 0 claim 3 , 0 claim 3 , −j claim 3 , ...

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Номер записи: 58

24-05-2018 дата публикации

Dual Receive Processing In Wireless Communications

Номер: US20180145711A1

Автор: Burnet Craig, Low Tze-Ping, MOON JANGWOOK

Принадлежит:

A technique, as well as select implementations thereof, pertaining to dual receive processing in wireless communications is described. The technique may involve receiving, by a plurality of receive processing modules, an incoming signal from an antenna to provide a plurality of processing results. The technique may also involve generating, by a determination mechanism, a determination output based on the plurality of processing results. The determination output may include either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing modules or a weighted combination of more than one respective processing result from more than one receive processing module of the plurality of receive processing modules. The technique may further involve decoding, by a decoder, the determination output to provide a decoded signal. 1. An apparatus , comprising:an antenna configured to receive an incoming signal;a plurality of receive processing circuits comprising at least a first receive processing circuit and a second receive processing circuit, each of the plurality of receive processing circuits coupled to the antenna and configured to receive the incoming signal from the antenna and process the incoming signal to produce a respective processing result;a determination circuit configured to receive the processing results from the plurality of receive processing circuits and generate a determination output, the determination output comprising either one or more decoding metrics based on a respective processing result from one of the plurality of receive processing circuits or a weighted combination of more than one respective processing result from more than one receive processing circuit of the plurality of receive processing circuits; anda decoder configured to receive the determination output from the determination circuit and decode the determination output to provide a decoded signal, a plurality of weight ...

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Номер записи: 59

10-06-2021 дата публикации

APPARATUS FOR TRANSMITTING AND RECEIVING DATA TO PROVIDE HIGH-SPEED DATA COMMUNICATION AND METHOD THEREOF

Номер: US20210176663A1

Автор: CHOI Eun-Young, JEON Taehyun, KIM Myung-Soon, Lee Sok-Kyu, LYU Deuk-Su, YU Hee-Jung

Принадлежит:

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used. 1. A device configured to be used in a terminal in a wireless communication , the device comprising: [ a first preamble,', 'a second and a third preambles positioned subsequent to the first preamble,', 'a first bit stream positioned between the second preamble and the third preamble, and', 'a data field positioned subsequent to the third preamble; and, 'cause the terminal to generate a frame, the frame comprising, 'cause the terminal to transmit the frame,', the first bit stream comprises information about whether or not the frame is transmitted using space time block coding, the first bit stream comprising at least one bit,', 'the third preamble comprises a fourth preamble and a fifth preamble, and', 'the second preamble is preceded by a guard interval having a length of 1.6 μsec, the first bit stream is preceded by a guard interval having a length of 0.8 μsec, the fourth preamble is preceded by a guard interval having a length of 0.8 μsec, fifth preamble is preceded by a guard interval having a length of 0.8 μsec, and the data field is preceded by a guard interval having a length of 0.8 μsec., 'wherein], 'a unit configured to2. The device of claim 1 , wherein the first and second preambles are time domain representations of a first and second sequence claim 1 ...

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Номер записи: 60

10-06-2021 дата публикации

Wireless communication method using ofdma random access and wireless communication terminal using same

Номер: US20210176799A1

Автор: Geonjung Ko, Jinsam Kwak, Juhyung Son, Woojin Ahn

Принадлежит: SK TELECOM CO LTD, Wilus Institute of Standards and Technology Inc

Provided is a wireless communication terminal that wirelessly communicates with a base wireless communication terminal. The wireless communication terminal includes a transceiver, and a processor. The processor is configured to set an integer selected from a range of 0 to a value equal to or smaller than an OFDMA Contention Window (OCW) as a counter for random access, receive a trigger frame for triggering random access using one or more resource units (RUs) allocated for the random access from the base wireless communication terminal using the transceiver, decrement a value of the counter based on the one or more RUs allocated for the random access, randomly select one RU based on the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU.

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Номер записи: 61

02-06-2016 дата публикации

Dynamic allocation of transceivers and frequency channels in mimo systems

Номер: US20160156400A1

Автор: Delaram Fakhrai, Mehran Moshfeghi

Принадлежит: Golba LLC

A communication system is provided that switches the communication of multi-antenna transmitter and receiver terminals between MIMO and frequency-bundle modes. In MIMO mode all transmitter and receiver antennas operate in the same frequency channel while in frequency-bundle mode each pair of one transmitter antenna and one receiver antenna is tuned to a different frequency channel. The communication system includes one or more control modules that collect, analyze, and apply configurations to the terminals and switch the operation of one or more transmit/receive terminal pairs between the MIMO and frequency-bundle modes based on the collected information and metrics. The monitored information and metrics include the availability of idle frequency channels in the available frequency band, propagation channel conditions, peak throughput demand by different users, power consumption budget and battery lives of different terminals, distance between transmitter and receiver antennas in each communicating transmitter/receiver pair, and overall traffic demand by terminals.

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Номер записи: 62

07-05-2020 дата публикации

MULTIPLE STREAM SPACE-TIME BLOCK CODING

Номер: US20200145137A1

Автор: CIOCHINA Dana, FELLHAUER Felix, HANDTE Thomas

Принадлежит: SONY CORPORATION

Transmitter having multiple transmit antennas for transmitting two or more streams. The transmitter comprises an encoding circuitry configured to perform space-time block encoding to obtain for at least one of the two or more streams a pair of space-time encoded streams. Further, a mapping circuitry is configured to assign each stream of each pair of space-time encoded streams to a transmit antenna of the multiple transmit antennas for wirelessly transmitting the two or more streams. Finally, a control circuitry is configured to adjust one or more parameters of the mapping circuitry in order to achieve a defined channel characteristic between the transmitter and a receiver. 1. Transmitter having multiple transmit antennas for transmitting two or more streams , comprising:an encoding circuitry configured to perform space-time block encoding to obtain for at least one of the two or more streams a pair of space-time encoded streams; 'a control circuitry configured to adjust one or more parameters of the mapping circuitry in order to achieve a defined channel characteristic between the transmitter and a receiver.', 'a mapping circuitry configured to assign each stream of each pair of space-time encoded streams to a transmit antenna of the multiple transmit antennas for wirelessly transmitting the two or more streams; and'}2. Transmitter according to claim 1 , wherein the encoding circuitry is configured to encode the two or more streams independently.3. Transmitter according to claim 1 , wherein the encoding circuitry is configured to apply to the at least one of the two or more streams Alamouti space-time block encoding such that a code rate of 1 for each pair of space-time encoded streams is achievable claim 1 , the code rate defining the number of symbols encoded per time slot on an average over the course of one block.4. Transmitter according to claim 1 , wherein the control circuitry is further configured to acquire channel feedback from a receiver in order to ...

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Номер записи: 63

17-06-2021 дата публикации

USER TERMINAL

Номер: US20210185709A1

Автор: Hou Xiaolin, Nagata Satoshi, Takeda Kazuki, Wang Lihui

Принадлежит: NTT DOCOMO, INC.

A user terminal according to an aspect of the present disclosure includes: a receiving section configured to receive a downlink shared channel transmitted from different transmission/reception points for each given number of repetitions; and a control section configured to control the reception of the downlink shared channel based on a transmission configuration indicator (TCI) state associated with a repetition among the given number of repetitions of the downlink shared channel or with a redundancy version of the downlink shared channel. 1. A user terminal , comprising:a receiving section that receives a downlink shared channel transmitted from different transmission/reception points for each given number of repetitions; anda control section that controls the reception of the downlink shared channel based on a transmission configuration indicator (TCI) state associated with a repetition among the given number of repetitions of the downlink shared channel or with a redundancy version of the downlink shared channel.2. The user terminal according to claim 1 , wherein the control section assumes that one or more antenna ports for reference signal demodulation of the downlink shared channel are quasi-co-located with a downlink reference signal indicated by the TCI state.3. The user terminal according to claim 1 , wherein the receiving section receives downlink control information used for scheduling all the repetitions of the downlink shared channel claim 1 , anda given field value in the downlink control information indicates the TCI state for the repetitions or the redundancy versions.4. The user terminal according to claim 3 , wherein the given field value or a field value other than the given field value in the downlink control information indicates the overall number of repetitions.5. The user terminal according to claim 1 , wherein the receiving section receives downlink control information used for scheduling the downlink shared channel with a change made for ...

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Номер записи: 64

28-08-2014 дата публикации

Spatio-Temporal Processing for Communication

Номер: US20140241314A1

Автор: Gregory G. Raleigh, Michael A. Pollack, Vincent K. Jones, IV

Принадлежит: Cisco Technology Inc

A space-time signal processing system with advantageously reduced complexity. The system may take advantage of multiple transmitter antenna elements and/or multiple receiver antenna elements, or multiple polarizations of a single transmitter antenna element and/or single receiver antenna element. The system is not restricted to wireless contexts and may exploit any channel having multiple inputs or multiple outputs and certain other characteristics. Multi-path effects in a transmission medium cause a multiplicative increase in capacity.

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Номер записи: 65

07-06-2018 дата публикации

Method and apparatus for wide bandwidth ppdu transmission in a high efficiency wireless lan

Номер: US20180160429A1

Автор: Yongho Seok

Принадлежит: Newracom Inc

Methods and apparatus for a wideband Physical layer Protocol Data Unit (PPDU) transmission in a High Efficiency WLAN (HEW) include a method for transmitting a Physical layer Protocol Data Unit (PPDU) in a wireless local area network. The method may further include performing a stream parsing of data bit streams to output blocks, determining whether to perform a segment parsing of the blocks based on a predetermined condition to output frequency subblocks, performing a constellation mapping of the blocks or the frequency subblocks, and transmitting the PPDU.

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Номер записи: 66

04-09-2014 дата публикации

Low Complexity Maximum Likelihood Detection of Concatenated Space Codes for Wireless Applications

Номер: US20140247896A1

Автор: Patrick Poon, Siavash Alamouti, Vahid Tarokh

Принадлежит: AT&T MOBILITY II LLC

Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.

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Номер записи: 67

14-06-2018 дата публикации

COMPRESSION OF FREQUENT DATA VALUES ACROSS NARROW LINKS

Номер: US20180167082A1

Автор: Broussard Bryan P., Donley Greggory D., Kalyanasundharam Vydhyanathan

Принадлежит:

Systems, apparatuses, and methods for compression of frequent data values across narrow links are disclosed. In one embodiment, a system includes a processor, a link interface unit, and a communication link. The link interface unit is configured to receive a data stream for transmission over the communication link, wherein the data stream is generated by the processor. The link interface unit determines if blocks of data of a first size from the data stream match one or more first data patterns and the link interface unit determines if blocks of data of a second size from the data stream match one or more second data patterns. The link interface unit sends, over the communication link, only blocks of data which do not match the first or second data patterns. 1. A system comprising:a processor;a link interface unit; anda communication link; monitor a received data stream;', 'dynamically determine data patterns that occur frequently within the data stream; and', 'send, over the communication link, first portions of the data stream without sending second portions of the data stream, responsive to determining the second portions of the data stream match one or more of said dynamically determined data patterns., 'wherein the link interface unit is configured to2. The system as recited in claim 1 , wherein the link interface unit is further configured to send an encoding over the communication link to indicate which data pattern the second portions match.3. The system as recited in claim 2 , wherein the link interface unit is configured to send an indication as to which portions were not sent.4. The system as recited in claim 1 , wherein the link interface unit is configured to:partition the data stream into blocks of a first size; anddetermine if every other block of the blocks matches the one or more dynamically determined data patterns.5. The system as recited in claim 4 , wherein the link interface unit is further configured to drop said every other block in response ...

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Номер записи: 68

21-05-2020 дата публикации

RECEPTION APPARATUS AND RECEPTION METHOD

Номер: US20200162145A1

Автор: Kimura Tomohiro, MURAKAMI Yutaka, Ouchi Mikihiro

Принадлежит:

A transmission apparatus includes M signal processors that respectively generate modulated signals directed to M reception apparatuses, M being an integer equal to or greater than 2, and an antenna section. Each signal processor modulates a first bit sequence made up of two bits to generate a first modulated signal and a second modulated signal, and modulates a second bit sequence made up of other two bits to generate a third modulated signal and a fourth modulated signal, in a case of transmitting multiple streams to a corresponding one of the M reception apparatuses. The antenna section includes a first antenna that transmits the first modulated signal and the third modulated signal and a second antenna that transmits the second modulated signal and the fourth modulated signal. At least either the signals transmitted from the first antenna or the signals transmitted from the second antenna are phase-changed signals. 1. A reception apparatus comprising:a receiver, which, in operation, receives a first precoded signal and a second precoded signal; anda signal processor, which, in operation, performs a decoding and demodulation process on the first precoded signal and the second precoded signal, whereinin response to only one of the first precoded signal and the second precoded signal having its phase changed through precoding by a communication partner apparatus, the decoding and demodulation process generates one layer of signal for the reception apparatus and performs demodulation with phase change on the one layer of signal, andin response to both of the first precoded signal and the second precoded signal having their phase changed through precoding by the communication partner apparatus, the decoding and demodulation process generates two layers of signals for the reception apparatus and performs demodulation without phase change on the two layers of signals.2. The reception apparatus according to claim 1 , wherein claim 1 , when both of the first precoded ...

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Номер записи: 69

21-05-2020 дата публикации

Method for allocating reference signal resource in wireless communication system and apparatus therefor

Номер: US20200162213A1

Автор: Hanbyul Seo, Heejin Kim, Hyukjin Chae, Seungmin Lee, Youngtae Kim

Принадлежит: LG ELECTRONICS INC

The present invention relates to a method and apparatus for a transmission device to transmit a reference signal in a wireless communication system. Specifically, the method includes: a step for receiving the settings of a resource pool composed of uplink resources; and a step for mapping reference signals and data onto a specific uplink resource on the basis of the resource pool settings and N (where N is a natural number) antennas for the transmission device, and is characterized in that the reference signals are mapped to at least one resource element at a specific location on the specific uplink resource, and the data is mapped on the specific uplink resource excluding the at least one specific location to be mutually orthogonal on the basis of one resource axis among the time-frequency resources and so that the data is continuous depending on the number of antennas. The transmitting device is capable of communicating with at least one of another receiving device, a receiving device related to an autonomous driving vehicle, a base station or a network.

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Номер записи: 70

13-06-2019 дата публикации

Supporting or performing distribution of a paging message

Номер: US20190182803A1

Автор: Gunnar Mildh, Icaro L.J. Da Silva, Johan Rune, Jose Luis Pradas

Принадлежит: Telefonaktiebolaget LM Ericsson AB

A wireless device, a first network node and methods therein, for supporting or performing distribution of paging messages within a Radio Access Network Area, RANA, of a wireless network. The wireless device collects RANA related information from network nodes visited by the wireless device. The RANA related information indicates which RANAs are supported by the respective network nodes. A list of network nodes that support a RANA is extracted from the collected RANA related information, and the list is sent to the first network node to enable distribution of paging messages by the first network node within the RANA.

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Номер записи: 71

07-07-2016 дата публикации

Parallel bit interleaver

Номер: US20160197626A1

Автор: Mihail Petrov

Принадлежит: Panasonic Corp

A bit interleaving method applying a bit permutation process to a QC LDPC codeword made up of N cyclic blocks of Q bits each, dividing the processed codeword into constellation words of M bits each, and applying an intra-cyclic-block permutation process to the cyclic blocks, where the codeword is divided into F×N/M folding sections of M/F cyclic blocks each and the constellation words are each associated with one of the folding sections, and the bit permutation process is applied such that the constellation words are each made up of F bits from each of M/F different cyclic blocks in the associated section, after the permutation process.

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Номер записи: 72

16-07-2015 дата публикации

Mode hopping spread spectrum modulation

Номер: US20150200704A1

Автор: Gary M. Graceffo

Принадлежит: Raytheon Co

A method and apparatus for data modulation in an antenna array include: storing input data comprising of a plurality of data bits, in a buffer; generating a pseudo random number; computing a transmission mode from the pseudo random number; based on the computed transmission mode and the number of antenna elements in the antenna array, computing a particular phase offset for each antenna element; sequentially providing the stored input data, one bit at a time, to each antenna element; and transmitting the input data from each antenna element according to the computed particular phase offset for said each antenna element.

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Номер записи: 73

20-06-2019 дата публикации

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WLAN SYSTEM AND DEVICE THEREFOR

Номер: US20190190754A1

Автор: Choi Jinsoo, Kim Jinmin

Принадлежит: LG ELECTRONICS INC.

The present specification discloses a method for transmitting and receiving a signal in a WLAN system, by a station, and a device therefor. More particularly, the present specification discloses, when a station transmits and receives a signal through a channel on which one or two channels are bonded, a method for constituting an enhanced directional multi gigabit (EDMG) short training field (STF) for an orthogonal frequency division multiplexing (OFDM) packet, and transmitting and receiving a signal comprising the constituted EDMG STF field, and a device therefor. 1. A method in a wireless local area network (WLAN) system , the method performed by a first station (STA) in an Orthogonal Frequency Division Multiplexing (OFDM) mode and comprising:generating an Enhanced Directional Multi Gigabit Short Training Field (EDMG STF) signal a STF sequence,wherein the STF sequence includes an A sequence and a B sequence; andtransmitting an EDMG Physical Protocol Data Unit (PPDU) including the generated EDMG STF signal via a wireless channel based on one or more space-time streams (STSs)-to the second STA,wherein the A sequence and the B sequence are determined based on a number of contiguous 2.16 GHz channels for the wireless channel and an index value of the one or more STSs, andwherein the STF sequence is defined as {A, 0, 0, 0, B}.2. The method of claim 1 , wherein the wireless channel includes a single 2.16 GHz channel claim 1 , the A sequence and the B sequence have a length of 176 bits claim 1 , respectively.317-. (canceled)18. The method of claim 2 , wherein when the index value is ‘1’ claim 2 ,{'i': j,', 'j,', '−j,', 'j,', 'j,', 'j,', '−j,', '−j,', '−j,', 'j,', 'j,', '−j,', 'j,', 'j,', '−j,', 'j,', 'j,', 'j,, 'the A sequence is defined as {0, 1, 0, 0, 0, +0, 0, 0, +0, 0, 0, −1, 0, 0, 0, 0, 0, 0, +0, 0, 0, −1, 0, 0, 0, 1, 0, 0, 0, −1, 0, 0, 0, +0, 0, 0, 1, 0, 0, 0, −1, 0, 0, 0, 1, 0, 0, 0, −1, 0, 0, 0, +0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, ...

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Номер записи: 74

22-07-2021 дата публикации

A method for wireless data communication and a communication apparatus

Номер: US20210226673A1

Автор: BO LIU, Han Wang, Lichun Chen, Qiangeng CHENG, Yunyan XIE

Принадлежит: BOE Technology Group Co Ltd, Chongqing BOE Smart Electronics System Co Ltd

The present application discloses a method for operating a wireless communication system. The method includes receiving a series of input data bits in a current timeslot by a transmitter and encoding the input data bits with a cross-Gray coding scheme to obtain coded information bits. Additionally, the method includes mapping the coded information bits to obtain respective multiple transmission symbols X t for the current timeslot in a constellation diagram. Furthermore, the method includes converting the multiple transmission symbols X t to generate a space-time matrix S t of the current timeslot by incorporating spatial bits associated with orders of respective transmitting antennas based on a space-time matrix S t-1 of a previous timeslot. Moreover, the method includes transmitting a respective one of elements in the space-time matrix S t using a respective one transmitting antenna activated in the transmitter.

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Номер записи: 75

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: 76

18-06-2020 дата публикации

SPACE TIME BLOCK CODES FOR SEMI-ORTHOGONAL MULTI-ACCESS BASED WLAN SYSTEMS

Номер: US20200195381A1

Автор: Aboul-Magd Osama, Au Kwok Shum, Bayesteh Alireza, JIA Jia, Suh Jung Hoon

Принадлежит: Huawei Technologies Co., Ltd.

The disclosed systems, structures, and methods are directed to a wireless local area network (WLAN) transmission architecture and transmitting methodology that combines space-time block code (STBC) encoding techniques with semi-orthogonal multiple access (SOMA) schemes to improve throughput rate performance for lower signal strength data. The transmission architecture and method includes a data processing module that is configured to digitally process and format data produced by two wireless stations. A SOMA constellation quadrature encoding module operates to apply quadrature-based modulation to the processed data and map the data to a modulation constellation based on data signal strength and data bit reliability. An STBC encoding module is configured to block encode the SOMA modulated data with orthogonal codes to produce STBC-based SOMA-symbol data having time and space diversity properties that improve throughput performance at lower signal strength levels. 1. A wireless local area network (WLAN) communication device , comprising:a data processing module configured to digitally process first data for a first wireless station (STA) and second data for a second wireless station (STA);a space-time block code (STBC) encoding module operative to receive and encode the processed first data to produce first orthogonal block-encoded symbol data;a semi-orthogonal multiple access (SOMA) encoding module configured to apply quadrature-based modulation constellation mapping to the first orthogonal block-encoded symbol data and to the processed second data, to produce STBC-based SOMA-symbol data; anda communication module configured to transmit the STBC-based SOMA-symbol data to the first and second STAs.2. The WLAN communication device of claim 1 , wherein the STBC encoding module operates to digitally process the first data by scrambling the data claim 1 , binary convolutionally encoding the scrambled data claim 1 , and interleaving the binary convolutionally-encoded data. ...

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Номер записи: 77

29-07-2021 дата публикации

MULTIPLE STREAM SPACE-TIME BLOCK CODING

Номер: US20210234636A1

Автор: CIOCHINA Dana, FELLHAUER Felix, HANDTE Thomas

Принадлежит: Sony Group Corporation

Transmitter having multiple transmit antennas for transmitting two or more streams. The transmitter comprises an encoding circuitry configured to perform space-time block encoding to obtain for at least one of the two or more streams a pair of space-time encoded streams. Further, a mapping circuitry is configured to assign each stream of each pair of space-time encoded streams to a transmit antenna of the multiple transmit antennas for wirelessly transmitting the two or more streams. Finally, a control circuitry is configured to adjust one or more parameters of the mapping circuitry in order to achieve a defined channel characteristic between the transmitter and a receiver. 1. Transmitter having multiple transmit antennas for transmitting two or more streams , comprising circuitry configured to:perform space-time block encoding to obtain for at least one of the two or more streams a pair of space-time encoded streams;assign each stream of each pair of space-time encoded streams to a transmit antenna of the multiple transmit antennas for wirelessly transmitting the two or more streams; andadjust one or more parameters of the mapping circuitry in order to reduce interference between the two or more streams transmitted between the transmitter and a receiver,wherein a first subgroup of streams of the two or more streams is allocated to a first receiver and a second subgroup of streams of the two or more streams is allocated to a second receiver.2. Transmitter according to claim 1 , wherein the circuitry is further configured to encode the two or more streams independently.3. Transmitter according to claim 1 , wherein the circuitry is further configured to apply to the at least one of the two or more streams Alamouti space-time block encoding such that a code rate of 1 for each pair of space-time encoded streams is achievable claim 1 , the code rate defining the number of symbols encoded per time slot on an average over the course of one block.4. Transmitter according to ...

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Номер записи: 78

27-07-2017 дата публикации

METHOD AND APPARATUS FOR PACKET RETRANSMISSION

Номер: US20170214492A1

Автор: Li Dong, Liu Yong, Xu Yanli

Принадлежит: ALCATEL LUCENT

Example embodiments of the present invention provide a method and apparatus for packet retransmission. The method comprises binding a plurality of consecutive packets of the device to obtain a bound packet. The method further comprises transmitting the bound packet for multiple times in at least one of a time domain and a frequency domain, wherein at least one of a time interval and a frequency interval is present between every two consecutive transmissions. Through binding a plurality of consecutive packets into one bound packet and transmitting the bound packet for multiple times at a time interval and/or a frequency domain interval in the time domain and/or the frequency domain, upon reception of the packet, not only the gain obtained by joint channel estimation across a plurality of subframes is maintained, but also the time diversity gain and the frequency domain diversity gain may also be obtained for each of the plurality of consecutive packets, thereby enhancing link performance. 1. A method for packet retransmission , comprising:binding a plurality of consecutive packets of a device to obtain a bound packet, andtransmitting the bound packet for multiple times in at least one of a time domain and a frequency domain, wherein at least one of a time interval and a frequency interval is present between every two consecutive transmissions.2. The method according to claim 1 , wherein each packet included in the bound packet is a packet of the same redundancy version during the multiple times of transmission.3. The method according to claim 1 , wherein each packet included in the bound packet is a packet of a different redundancy version during the multiple times of transmission.4. The method according to claim 1 , wherein when the bound packet is transmitted for multiple times in the time domain claim 1 , the time interval between every two consecutive transmissions is set to obtain a time diversity gain; and wherein when the bound packet is transmitted for ...

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Номер записи: 79

13-08-2015 дата публикации

APPARATUS AND METHOD FOR SENDING AND RECEIVING BROADCAST SIGNALS

Номер: US20150229443A1

Автор: HONG Sungryong, Hwang Jaeho, Ko Woosuk

Принадлежит:

Disclosed is an apparatus for transmitting a broadcast signal including: an input formatter module configured to de-multiplex an input stream into at least one data pipe (DP); a BICM module configured to perform error correction on data of the at least one DP; a frame building module configured to generate a signal frame including the data of the DP; and an OFDM generation module configured to generate a transmission signal by inserting a preamble into the signal frame and performing OFDM modulation thereon. 1. An apparatus for transmitting a broadcast signal , the apparatus comprising:an input formatter module configured to de-multiplex an input stream into at least one data pipe (DP);a BICM module configured to perform error correction on data of the at least one DP;a frame building module configured to generate a signal frame including the data of the DP; andan OFDM generation module configured to generate a transmission signal by inserting a preamble into the signal frame and performing OFDM modulation,wherein the input formatting module comprises:a header compression module configured to compress IP headers of IP packets included in an IP stream when the input stream is the IP stream;a baseband (BB) frame slicer module configured to allocate data of the IP packets to a BB frame; anda BB frame header insertion module configured to insert a BB frame header into the BB frame.2. The apparatus of claim 1 , wherein the IP header compression information includes IP packet position information indicating positions of the IP packets within the BB frame.3. The apparatus of claim 2 , wherein the IP header compression information includes IP packet type information.4. The apparatus of claim 2 , wherein the IP packet position information is start position information of the IP packets within the signal frame or length information of the IP packets within the signal frame.5. The apparatus of claim 1 , wherein the IP header compression information is included in an extension ...

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Номер записи: 80

11-08-2016 дата публикации

Wireless communication system and transmitter

Номер: US20160233984A1

Автор: Hiroyuki Akutagawa, Takehiko Kobayashi

Принадлежит: HITACHI KOKUSAI ELECTRIC INC

A radio communication system that provides a transmission technique capable of suppressing degradation of communication quality even in an area other than an interference area of two base station radio waves.

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Номер записи: 81

09-08-2018 дата публикации

PILOTS FOR MIMO COMMUNICATION SYSTEMS

Номер: US20180227021A1

Автор: Howard Steven, Ketchum John, Wallace Mark, Walton J. Rodney

Принадлежит:

Pilots suitable for use in MIMO systems and capable of supporting various functions are described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered reference or steered pilot, and a carrier pilot. The beacon pilot is transmitted from all transmit antennas and may be used for timing and frequency acquisition. The MIMO pilot is transmitted from all transmit antennas but is covered with different orthogonal codes assigned to the transmit antennas. The MIMO pilot may be used for channel estimation. The steered reference is transmitted on specific eigenmodes of a MIMO channel and is user terminal specific. The steered reference may be used for channel estimation. The carrier pilot may be transmitted on designated subbands/antennas and may be used for phase tracking of a carrier signal. Various pilot transmission schemes may be devised based on different combinations of these various types of pilot. 1. A method for wireless multiple-input multiple-output (MIMO) communication utilizing orthogonal frequency division multiplexing (OFDM) comprising:obtaining a set of pilot symbols for each antenna in a plurality of antennas;obtaining an orthogonal sequence for each antenna in the plurality of antennas, wherein the plurality of antennas are assigned different orthogonal sequences;covering the set of pilot symbols for each antenna with the orthogonal sequence for the antenna to obtain a set of sequences of covered pilot symbols for the antenna;processing the set of sequences of covered pilot symbols for each antenna to obtain a sequence of OFDM symbols for the antenna; andtransmitting the plurality of sequences of OFDM symbols from the plurality of antennas.2. The method of claim 1 , wherein the pilot symbols correspond to one or more of a beacon pilot claim 1 , a MIMO pilot claim 1 , a steered pilot and a carrier pilot.3. The method of claim 1 , wherein the pilot symbols correspond to a MIMO pilot and wherein covering the set of pilot symbols ...

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Номер записи: 82

09-08-2018 дата публикации

METHODS AND DEVICES FOR ROBUSTNESS ENHANCEMENT IN A WIRELESS COMMUNICATION SYSTEM

Номер: US20180227084A1

Автор: Lu Qianxi, Zhang Zhan, Zhu Huaisong

Принадлежит: Telefonaktiebolaget lM Ericsson (publ)

The present disclosure provides methods and devices for robustness enhancement in a wireless communication system comprising a plurality of network nodes and a wireless communication device which is configured to be connected to the plurality of network nodes including a first network node. Embodiments disclosed herein describe a first network node, a wireless communication device, a method in the first network node, a method in the wireless communication device, a wireless communication system and a non-transitory machine-readable medium. The method in the first network node comprises the operations of transmitting a data packet to the wireless communication device; generating assistance information indicating to the wireless communication device when to search for the same data packet from at least a second network node of the plurality of network nodes for soft combination; and transmitting the assistance information to the wireless communication device. 1. A method in a first network node for enabling soft combination in a wireless communication device , wherein the wireless communication device is connected to a plurality of network nodes including the first network node , the method comprising:transmitting a data packet to the wireless communication device;generating assistance information indicating to the wireless communication device when to search for the same data packet from one or more second network nodes of the plurality of network nodes for soft combination; andtransmitting the assistance information to the wireless communication device.2. The method of claim 1 , wherein when the first network node and the second network node transmit the same data packet to the wireless communication device in an asynchronous manner claim 1 , the assistance information includes information regarding a search window within which the wireless communication device searches for the same data packet from the second network node.3. The method of claim 2 , wherein the ...

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Номер записи: 83

18-07-2019 дата публикации

TRANSMITTER AND METHOD FOR TRANSMITTING DATA BLOCK IN WIRELESS COMMUNICATION SYSTEM

Номер: US20190222378A1

Автор: Cheong Min Ho, Lee Sok Kyu, OH Jong Ee

Принадлежит:

Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (N) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the Nand generating a coded block; parsing the coded block based on the s and the Nand generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver. 1{'sub': 'ES', 'determining a number of bits assigned to a single axis of a signal constellation, s, and a number of encoders, N;'}{'sub': CBPSS', 'ES, 'encoding information bits to generate a coded block of Nbits based on s and N;'}{'sub': 'ES', 'parsing the coded block to generate a plurality of frequency subblocks based on s and N; and'}transmitting the plurality of frequency subblocks to a receiver.. A method of transmitting a data block in a wireless communication system, comprising: The present invention relates to wireless communication, and more particularly, to a method of transmitting a data block in a wireless communication system, and a transmitter.Recently, various wireless communication technologies are under development in accordance with the advancement of information communication technology. Among them, a wireless local area network (WLAN) is a technique allowing mobile terminals such as personal digital assistants (PDAs), lap top computers, portable multimedia players (PMPs), and the like, to wirelessly access the Internet at homes, in offices, or in a particular service providing area, based on a radio frequency technology.As a technology specification that has been relatively recently legislated in order to overcome a limitation in a communication speed that has been pointed out as a weak point in the WLAN, there is the IEEE (Institute of Electrical and Electronics Engineers) 802.11n. An object of the IEEE 802.11n is to increase a speed and reliability of ...

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Номер записи: 84

18-07-2019 дата публикации

METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN WIRELESS LAN SYSTEM AND APPARATUS THEREFOR

Номер: US20190222450A1

Автор: Choi Jinsoo, Kim Jinmin, PARK Sungjin, YUN Sunwoong

Принадлежит: LG ELECTRONICS INC.

The present specification presents a method for transmitting and receiving, by a station, a signal in a wireless LAN (WLAN) system supporting eight space time streams at most, and an apparatus therefor. More particularly, the present specification presents a method for transmitting and receiving a signal including a pilot sequence for 3-channel bonding or 4-channel bonding per each space time stream when a station transmits and receives a signal over a channel in which three or four channels are bonded, and an apparatus therefor. 1. A method in a wireless LAN (WLAN) system , the method comprising:generating, by a first station (STA) supporting a plurality of space time streams (STSs), a first pilot sequence related with 56 subcarriers for three bonded channels based on a second pilot sequence related with 16 subcarriers and a third pilot sequence related with 12 subcarriers, wherein the second pilot sequence is set to one sequence among a plurality of second pilot sequences for the plurality of STSs, wherein the third pilot sequence is set to one sequence among a plurality of third pilot sequences for the plurality of STSs, wherein the plurality of the second pilot sequences for the plurality of STSs are mutually orthogonal, and wherein the plurality of the third pilot sequences for the plurality of STSs are mutually orthogonal, wherein a maximum number of the STSs supported by the first STA is eight; andtransmitting, by the first STA to a second STA, a signal including the first pilot sequence through the three bonded channels.2. The method of claim 1 , whereinthe signal is transmitted through up to the 8 STSs.3. The method of claim 1 , whereinthe first pilot sequence is configured by repeating the second pilot sequence and the third pilot sequence twice.4. The method of claim 3 , whereinthe first pilot sequence is configured in an order of the second pilot sequence, the third pilot sequence, the third pilot sequence, and the second pilot sequence.6. A method in a ...

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Номер записи: 85

09-07-2020 дата публикации

RADIO TRANSMISSION APPARATUS AND METHODS

Номер: US20200220687A1

Автор: Matsuoka Akihiko, MURAKAMI Yutaka, ORIHASHI Masayuki

Принадлежит:

A radio transmission apparatus determines information indicative of an estimated communications channel condition and generates a single modulation signal or a plurality of modulation signals based on the estimated communications channel condition information. The single modulation signal is transmitted from a first antenna of a plurality of antenna or the plurality of modulation signals are transmitted from the first antenna and at least a second antenna of the plurality of antenna. The plurality of modulation signals include different information from each other and are transmitted over an identical frequency band and at an identical temporal point. The single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time. 1. A radio transmission apparatus comprising: determine information indicative of an estimated communications channel condition;', 'generate, based on the information indicative of the estimated communications channel condition, a single modulation signal or a plurality of modulation signals; and', 'transmit, based on the generation of the single modulation signal or the plurality of modulation signals, the single modulation signal from a first antenna of the plurality of antenna or the plurality of modulation signals from the first antenna and at least a second antenna of the plurality of antenna,, 'a plurality of antenna and circuitry configured towherein the plurality of modulation signals include different information from each other and are transmitted over an identical frequency band and at an identical temporal point, andwherein the single modulation signal and the plurality of modulation signals contain parameter information indicating a number of modulation signals transmitted at the same time.2. The radio transmission apparatus of claim 1 , wherein the information indicative of the estimated communications channel condition is estimated ...

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Номер записи: 86

06-11-2014 дата публикации

Method and apparatus for use in cooperative relays using incremental redundancy and distributed spatial multiplexing

Номер: US20140328244A1

Автор: Alexander Reznik, Ana Lucia Pinheiro, Eldad M. Zeira, Mihaela C. Beluri, Philip J. Pietraski, Prabakar R. Chitrapu, Sana Sfar

Принадлежит: InterDigital Patent Holdings Inc

A method and apparatus may be used in cooperative relays with incremental redundancy (IR) and distributed spatial multiplexing. A wireless transmit/receive unit (WTRU) may listen to the base station (BS) transmission during a first phase of the communication, and use cooperation between a relay station (RS) and the BS for the data transmission during a second phase to improve performance. During the second phase, both the BS and the RS may transmit data to the WTRU, using either distributed Space Time Block Codes/Space Frequency Block Codes (STBC/SFBC) or distributed spatial multiplexing.

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Номер записи: 87

16-07-2020 дата публикации

Apparatus, system and method of transmitting a ppdu

Номер: US20200228224A1

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

Принадлежит: Intel IP Corp

An apparatus of a transmitter may include, for example, a Golay builder to build modulated Golay sequences for at least a non-EDMG Short Training Field (L-STF), and a non-EDMG Channel Estimation Field (L-CEF) of a PPDU; a scrambler to generate scrambled bits by scrambling bits of a non-EDMG header (L-header) and a data field of the PPDU; an encoder to encode the scrambled bits into encoded bits according to a low-density parity-check (LDPC) code; a constellation mapper to map the encoded bits into a stream of constellation points according to a constellation scheme; a spreader to spread the stream of constellation points according to a Golay sequence; and a transmit chain mapper to map a bit stream output from the Golay builder and the spreader to a plurality of transmit chains by applying a spatial expansion with relative cyclic shift over the plurality of transmit chains.

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Номер записи: 88

26-08-2021 дата публикации

METHOD FOR TRANSMITTING CONTROL AND TRAINING SYMBOLS IN MULTI-USER WIRELESS COMMUNICATION SYSTEM

Номер: US20210266888A1

Автор: Lee Sok-Kyu, LEE Yu-Ro, SON Jung-Bo

Принадлежит: Electronics and Telecommunications Research Institute

The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result. 1. A wireless communication method comprising:receiving a legacy short training field;receiving a legacy long training field;receiving a legacy signal field;receiving a first non-legacy signal field;receiving a second non-legacy signal field using a first subfield of the first non-legacy signal field, the first subfield of the first non-legacy signal field indicating a modulation and coding scheme of the second non-legacy signal field;receiving a non-legacy long training fields; andreceiving a data field.2. The method of claim 1 , wherein the first non-legacy signal field further comprises a second subfield indicating a number of symbols of the second non-legacy signal field.3. The method of claim 2 , wherein the first non-legacy signal field further comprises a third subfield indicating a number of symbols of the non-legacy long training fields.4. The method of claim 3 , wherein the second non-legacy signal field comprises a first subfield indicating a modulation and coding scheme of the data field.5. The method of claim 4 , wherein the second non-legacy signal field further comprises a ...

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Номер записи: 89

23-08-2018 дата публикации

TREE SEARCH-BASED DECODING

Номер: US20180241591A1

Автор: MEJRI Asma, Rekaya-Ben Othman Ghaya

Принадлежит: Institut Mines Telecom

A method, device, and a computer program are provided to decode a signal received through a transmission channel in a communication system, the received signal being represented by a signal vector. The method comprises: 2. The method of claim 1 , wherein at least one of the slope coefficient and the intercept coefficient depends on a first function parameter which is higher than a predefined threshold claim 1 , said threshold being determined from the initial estimate of the transmitted symbol vector.3. The method of claim 1 , wherein said transmission channel is associated with a channel matrix (H) of a given dimension (n) and a QR decomposition being previously applied to said channel matrix where Q designates an orthogonal matrix and R an upper triangular matrix.4. The method of claim 3 , wherein said bound parameter (C) is defined as the minimum value between:{'sub': 1', '2, 'sup': '2', 'A first quantity determined from at least one of a first radius (C) function of the noise variance (σ) and a second radius (C) function of the minimum of the diagonal elements of the Gram matrix of said channel matrix, and'}{'sub': d', {'sub2': 'DFE'}], 'a second quantity corresponding to the value of said linear function of said initial estimate (C).'}5. The method of claim 4 , wherein said first quantity is determined as the minimum between said first radius (C) and said second radius (C).6. The method of claim 1 , wherein said linear function is a multiplicative function claim 1 , said slope coefficient being different from one.8. The method of claim 4 , wherein the minimum threshold depends on the square of the initial estimate of the transmitted symbol vector (d) claim 4 , the square of the first radius (C) claim 4 , and/or the square of the second radius (C).10. The method of claim 1 , wherein said linear function is an additive function different from the identity function claim 1 , the slope coefficient being equal to one and the intercept coefficient being different ...

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Номер записи: 90

23-07-2020 дата публикации

Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, and method therefor

Номер: US20200235857A1

Автор: Gaurav POONIWALA, Young-Ho Oh

Принадлежит: SAMSUNG ELECTRONICS CO LTD

A transmitting device is disclosed. The transmitting device includes a controller that groups a plurality of transmitters into a plurality of groups including three or more groups and a plurality of code units that generate different output streams based on a data stream with respect to the plurality of groups. The controller delivers the output streams to the plurality of groups.

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Номер записи: 91

20-11-2014 дата публикации

Wireless feedback communications over unlicensed spectrum

Номер: US20140341053A1

Автор: Aleksandar Damnjanovic, Durga Prasad Malladi, Gavin Bernard Horn, Naga Bhushan, Peter Gaal, Tao Luo, Tingfang JI, Wanshi Chen, Yongbin Wei

Принадлежит: Qualcomm Inc

Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes receiving feedback information from a user equipment (UE) via a primary component carrier (PCC) uplink in a licensed spectrum. A second method includes transmitting feedback information from a UE to an evolved Node B (eNB) via a PCC uplink in a licensed spectrum. The feedback information may address signals transmitted to the UE via a downlink in an unlicensed spectrum

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Номер записи: 92

09-09-2021 дата публикации

Wireless transmission device, wireless reception device, remote communication monitoring system and wireless communication method

Номер: US20210281459A1

Автор: Akinori Nakajima

Принадлежит: Mitsubishi Electric Corp

A wireless transmission device includes a repetition coding unit that prepares a basic waveform having a length less than a frequency conversion length that is used in a wireless reception device, generates a repetition waveform having a length greater than or equal to the frequency conversion length by repeating the basic waveform a plurality of times, and generates a data frame including the repetition waveform and a known signal.

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Номер записи: 93

30-08-2018 дата публикации

Time division multiple access (TDMA) media access control (MAC) adapted for single user, multiple user, multiple access, and/or MIMO wireless communications

Номер: US20180249410A1

Автор: Amini Peiman, Fischer Matthew James

Принадлежит: Avago Technologies General IP (Singapore) Pte. Ltd.

Time division multiple access (TDMA) media access control (MAC) adapted for single user, multiple user, multiple access, and/or MIMO wireless communications. Various com systems may include smart meter stations (SMSTAs) and/or wireless stations (STAs). Appropriate coordination is made with respect to such communication devices to ensure appropriate uplink (and/or downlink) communications between a network manager or coordinator (e.g., an access point (AP)) and the SMSTAs and/or STAs. With respect to SMSTAs, the relative duration of time that such communication devices are awake and operative versus asleep (or in a reduced power and/or functionality state) can be significant. Certain implementations may include a relatively large number of such communication devices (e.g., 10s, 100s, 1000s, or more), and appropriate coordination and scheduling of such communications to/from them is made using one or more variations of TDMA signaling (e.g., including different respective service periods (SPs), communication medium access operational modes, adaptation thereof, etc.). 1. A wireless communication device comprising:a communication interface; and support, via the communication interface, first communications with a first other wireless communication device to provide at least one characteristic of the wireless communication device to the first other wireless communication device;', 'receive, via the communication interface, an announcement or assignment frame from the first other wireless communication device that is based on the at least one characteristic and that includes first information to direct the wireless communication device to awaken from a power savings mode to an operational mode and to support second communications with the first other wireless communication device at or during a first time specified within the announcement or assignment frame and also includes second information to direct a second other wireless communication device to awaken from the power ...

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Номер записи: 94

27-11-2014 дата публикации

METHOD FOR TRANSMITTING A SIGNAL VIA A POWER LINE NETWORK, TRANSMITTER, RECEIVER, POWER LINE COMMUNICATION MODEM AND POWER LINE COMMUNICATION SYSTEM

Номер: US20140348251A1

Автор: Schneider Daniel, Schwager Andreas, Stadelmeier Lothar

Принадлежит: SONY CORPORATION

A method for transmitting signals over a power line network, wherein within the power line network at least one transmitter and at least one receiver communicate via at least two channels, each channel including a respective feeding port of at least one transmitter and the respective receiving port of the at least one transmitter and transmitter including at least two feeding ports. The method: determines a channel characteristic of each of the channels; applies a feeding port selection criterion based on the channel characteristic; and selects an excluded feeding port among the at least two feeding ports based on the feeding port selection criterion, wherein the excluded feeding port is not used during further communication. A corresponding power line communication modem can implement the method. 18-. (canceled)9. A Power Line Communication (PLC) transmitter connectable to phase , neutral , and protective earth wires of a power line network , the PLC transmitter comprising:a first feeding port that is connectable to the phase and neutral wires and that is configured to output a first communication signal for transmission from the transmitter;a second feeding port that is connectable to the phase and protective earth wires or to the neutral and protective earth wires and that is configured to output a second communication signal for transmission from the transmitter;circuitry configured to perform a feeding port selection operation based on a disturbance of the power line network for output of at least one of the first communication signal and the second communication signal, for data transmission, via at least one of the first feeding port and the second feeding port, respectively, based on the feeding port selection operation; andtransmitting circuitry that transmits data via a selected feeding port, the transmitted data being at least one of the first communication signal and the second communication signal.10. The transmitter according to claim 9 , wherein the ...

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Номер записи: 95

30-07-2020 дата публикации

Methods and apparatus for transmitting modulation signals

Номер: US20200244416A1

Автор: Akihiko Matsuoka, Masayuki Orihashi, Yutaka Murakami

Принадлежит: Wi-Fi One LLC

A plurality of multicarrier signals is generated. Each of the plurality of multicarrier signals includes a pilot symbol sequence at a same temporal point in each multicarrier signal. Each pilot symbol sequence includes a plurality of pilot symbols with non-zero amplitude. The pilot symbol sequences are orthogonal to each other at the same temporal point. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of multicarrier signals to be transmitted. The plurality of multicarrier signals are transmitted in an identical frequency band from a plurality of antennas. The plurality of antennas includes two, three, or four antennas.

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Номер записи: 96

13-09-2018 дата публикации

METHOD FOR TRANSMITTING AND RECEIVING DATA IN COOPERATIVE COMMUNICATION SYSTEM, AND COOPERATIVE COMMUNICATION METHOD

Номер: US20180262263A1

Автор: Chang Kap-Seok, Chung Hyun-Kyu, Kim Kyeongpyo, Kwon Hyoung-Jin, LEE Woo-Yong

Принадлежит: Electronics and Telecommunications Research Institute

A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node. 1. A data transmission method of a source node , comprising:transmitting a data to a relay node in a first time slot;transmitting the data to a destination node in a second time slot after the first time slot,wherein the relay node transmits the data to the destination node in the second time slot,wherein the data includes first symbols and second symbols,wherein the first symbols and the second symbols are allocated in other frequency resource.Wherein the source node performs transmitting the data, after beamforming based on antenna pattern.2. The method of claim 1 , wherein the source node performs beamforming using a training sequence having a length.3. The method of claim 1 , wherein the first symbols are derived by applying a complex conjugation to the second symbols claim 1 , or the second symbols are derived by applying a complex conjugation to the first symbols.4. The data transmission method of claim 1 , wherein the relay node transmits the data to the destination node in the second time slot claim 1 , based on FD (Full Duplex) or HD (Half Duplex).5. The data transmission method of claim 1 , wherein the source node modulates the data using QPSK or 16 QAM.6. The data transmission method of claim 1 , wherein the first symbols are odd symbols and the second symbols are even symbols.7. The data transmission method of claim 1 , wherein the first symbols are even symbols and the second symbols are odd symbols.8. A data transmission method of a relay node claim 1 , comprising:receiving a data from a source node in a first time slot;transmitting the data to a destination node in a second time slot after the first time slot;wherein the data includes first symbols and second symbols,wherein the first ...

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Номер записи: 97

13-09-2018 дата публикации

METHODS AND APPARATUS FOR TRANSMITTING MODULATION SIGNALS

Номер: US20180262309A1

Автор: Matsuoka Akihiko, MURAKAMI Yutaka, ORIHASHI Masayuki

Принадлежит:

A plurality of modulation signals is generated. Each of the plurality of modulation signals includes a pilot symbol sequence having a plurality of pilot symbols. Each pilot symbol sequence is inserted at a same temporal point in each modulation signal, and each pilot symbol in the pilot symbol sequence has a non-zero amplitude. A quantity of the plurality of pilot symbols in each pilot symbol sequence is greater than or equal to a quantity of the plurality of modulation signals to be transmitted. The plurality of modulation signals are transmitted in an identical frequency band from a plurality of antennas. Each of the transmitted plurality of modulation signals includes transmission data and one of the pilot symbol sequences. 1. A method of transmitting modulation signals , the method comprising:generating a plurality of modulation signals, each of the plurality of modulation signals including a pilot symbol sequence having a plurality of pilot symbols;inserting each pilot symbol sequence at a same temporal point in each modulation signal, each pilot symbol in the pilot symbol sequence having a non-zero amplitude, a quantity of the plurality of pilot symbols in each pilot symbol sequence being greater than or equal to a quantity of the plurality of modulation signals to be transmitted; andtransmitting in an identical frequency band the plurality of modulation signals, each of the plurality of modulation signals including transmission data and one of the pilot symbol sequences, from a plurality of antennas.2. The method of claim 1 , wherein the plurality of pilot symbols are for estimating a frequency offset and/or for synchronization.3. The method of claim 1 , wherein the plurality of pilot symbols each include real or complex numbers.4. The method of claim 1 , wherein each of the plurality of modulation signals includes different transmission data.5. The method of claim 1 , wherein a number of the plurality of antennas is two claim 1 , three claim 1 , or four ...

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Номер записи: 98

06-08-2020 дата публикации

Multi-Antenna Processing for Reference Signal

Номер: US20200252255A1

Автор: Faxér Sebastian, Sorrentino Stefano, Sun Wanlu

Принадлежит:

The methods and apparatus disclosed herein processes reference signals in an antenna diversity system, e.g., where both the transmitting and receiving devices use multiple antennas The solution presented herein process reference signals at the transmitting device in such a way to enable the receiving device to efficiently and accurately estimate the covariance matrix associated with data transmitted using transmitter diversity. This is achieved by processing the reference signals used for the covariance estimation and the data signals in the same way, e.g., by precoding data and reference signal portions of one or more signals using the same coding scheme. 140-. (canceled)41. A method performed by a transmitting device for precoding one or more signals to be wirelessly transmitted to a receiving device , the transmitting device and the receiving device both using multiple antennas for implementing antenna diversity , the method comprising:applying a coding scheme to data portions and to reference signal portions of the one or more signals to generate one or more coded signals, wherein the coding scheme applied to the data portions is the same as the coding scheme applied to the reference signal portions and wherein the coding scheme maps different reference signal portions or their conjugates to adjacent subcarriers or to adjacent symbols to be transmitted by different antennas of the multiple transmit antennas; andtransmitting the one or more coded signals to the receiving device using multiple transmit antennas of the transmitting device.42. A transmitting device configured to precode one or more signals to be wirelessly transmitted to a receiving device , the transmitting device and the receiving device both configured to use multiple antennas for implementing antenna diversity , the transmitting device comprising:one or more processing circuits configured to apply a coding scheme to data portions and to reference signal portions of one or more signals to ...

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Номер записи: 99

28-10-2021 дата публикации

METHOD FOR FEEDING BACK CHANNEL STATE IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

Номер: US20210337537A1

Автор: Cho Hangyu, Choi Jinsoo, Chun Jinyoung, Kim Jeongki, Kim Jinmin, Lim Dongguk, PARK Eunsung, Ryu Kiseon

Принадлежит: LG ELECTRONICS INC.

Disclosed herein is an operating method of a station (STA) in a wireless LAN (WLAN) system. The method includes receiving a downlink (DL) physical protocol data unit (PPDU) and sending an uplink (UL) PPDU as a response to the DL PPDU. The DL PPDU may include at least one MAC protocol data unit (MPDU) and the at least one MPDU may include a first high efficiency (HE) control field. The UL PPDU may include at least one MAC protocol data unit (MPDU) and the at least one MPDU may include a second high efficiency (HE) control field. The each of the first and second HE control fields corresponds to an HT control field and comprises a plurality of aggregated HE control subfield. The HT control field includes VHT subfield value set to “1” and HE subfield value set to “1”. 1. An operating method of access point (AP) in a wireless local area network (WLAN) system , the method comprising:transmitting a downlink (DL) physical protocol data unit (PPDU) to station (STA); andreceiving, from the STA, an uplink (UL) PPDU as a response to the DL PPDU,wherein the DL PPDU comprises at least one MAC protocol data unit (MPDU) including a first high throughput (HT) control field,wherein the UL PPDU comprises at least one MPDU including a second HT control field,wherein each of the first HT control field and second HT control field includes information on a configuration of a HT control field,wherein the information on the configuration of the HT control field represents one of a HT variant, a very high throughput (VHT) variant and a high efficiency (HE) variant,wherein each of the first HT control field and second HT control field is configured based on the HE variant, based on the information on the configuration of the HT control field representing the HE variant, andwherein each of the first HT control field and second HT control field includes at least one aggregated control subfields.2. The method of claim 1 , wherein each of the at least one aggregated control subfields of the first ...

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Номер записи: 100