ПЕРЕСТАНОВКА КОДОВЫХ СЛОВ И УМЕНЬШЕННАЯ ОБРАТНАЯ СВЯЗЬ ДЛЯ СГРУППИРОВАННЫХ АНТЕНН

FIELD: information technology. SUBSTANCE: in a per group rate control MIMO system, a codeword can be linked to more than one layer. Codewords are mixed among antennae in the MIMO systems based upon a symmetric permutation of antenna groups. Further, codewords are transmitted in permuted form so that receivers can reduce feedback for a base channel quality indicator (CQI) and a differential CQI. Additionally, spatial diversity is increased for each codeword improving the robustness of the system against inaccurate CQI reports. EFFECT: reducing feedback required for transmission over a return communication channel in response to data transmission over a forward communication line for multiple-input multiple-output wireless communication systems. 39 cl, 18 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 417 527 (13) C2 (51) МПК H04B 7/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009112384/09, 04.09.2007 (24) Дата начала отсчета срока действия патента: 04.09.2007 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) R U Приоритет(ы): (30) Конвенционный приоритет: 06.09.2006 US 60/842,872 (72) Автор(ы): КИМ Биоунг-Хоон (US) (43) Дата публикации заявки: 20.10.2010 Бюл. № 29 2 4 1 7 5 2 7 (45) Опубликовано: 27.04.2011 Бюл. № 12 (56) Список документов, цитированных в отчете о поиске: EP 1655874 A2, 10.05.2006. RU 2264010 C2, 10.11.2005. WO 2005/109717 A, 17.11.2005. 2 4 1 7 5 2 7 R U (86) Заявка PCT: US 2007/077536 (04.09.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 06.04.2009 (87) Публикация заявки РСТ: WO 2008/030806 (13.03.2008) Адрес для переписки: 129090, Москва, ул.Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Ю.Д.Кузнецову, рег.№ 595 (54) ПЕРЕСТАНОВКА КОДОВЫХ СЛОВ И УМЕНЬШЕННАЯ ОБРАТНАЯ СВЯЗЬ ДЛЯ СГРУППИРОВАННЫХ АНТЕНН (57) Реферат: Заявленное изобретение относится к беспроводной связи. Технический результат ...

ПЕРЕДАЧА MIMO C ПЕРЕСТАНОВКОЙ УРОВНЕЙ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ

FIELD: information technology. SUBSTANCE: techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennae (e.g., virtual antennae), the number of codewords being less than the number of antennae. Each codeword may be mapped across the multiple antennae. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennae on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords. EFFECT: high signal quality. 71 cl, 26 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 424 616 (13) C2 (51) МПК H04B 7/06 (2006.01) H04L 1/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009121517/09, 06.11.2007 (24) Дата начала отсчета срока действия патента: 06.11.2007 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) R U Приоритет(ы): (30) Конвенционный приоритет: 06.11.2006 US 60/864,581 (72) Автор(ы): МАЛЛАДИ Дурга Прасад (US), КИМ Биоунг-Хоон (US), ЙОО Таесанг (US) (43) Дата публикации заявки: 20.12.2010 Бюл. № 35 2 4 2 4 6 1 6 (45) Опубликовано: 20.07.2011 Бюл. № 20 2 4 2 4 6 1 6 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 08.06.2009 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 2006/161432, A1, 20.07.2006. WO 2006/018710, A1, 23.02.2006. US 2006/155533, A1, 13.07.2006. US 2006/223449, A1, 05.10.2006. RU 2147392, C2, 10.04.2000. RU 2233010, C2, 20.07.2004. RU 2237975, C1, 10.10.2004. (86) ...

ПЕРЕДАЧА MIMO C ПЕРЕСТАНОВКОЙ УРОВНЕЙ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ

... 1. Устройство для беспроводной связи, содержащее ! по меньшей мере один процессор, сконфигурированный с возможностью формировать несколько кодовых слов для передачи с нескольких антенн, причем количество кодовых слов меньше количества антенн, и отображать каждое из нескольких кодовых слов на несколько антенн; и ! память, соединенную по меньшей мере с одним процессором. ! 2. Устройство по п.1, в котором по меньшей мере один процессор сконфигурирован с возможностью однородно отображать каждое кодовое слово на несколько антенн таким образом, что равная часть кодового слова отображается на каждую из нескольких антенн. ! 3. Устройство по п.1, в котором по меньшей мере один процессор сконфигурирован с возможностью циклически отображать каждое кодовое слово на несколько антенн на нескольких поднесущих. ! 4. Устройство по п.1, в котором по меньшей мере один процессор сконфигурирован с возможностью формировать два кодовых слова, содержащие первое и второе кодовые слова, отображать первое кодовое ...

СПОСОБ СИГНАЛИЗАЦИИ ПРЕДВАРИТЕЛЬНОГО КОДИРОВАНИЯ В РЕЖИМЕ ПЕРЕДАЧИ С СОВМЕСТНЫМ ФОРМИРОВАНИЕМ ДИАГРАММЫ НАПРАВЛЕННОСТИ

... 1. Способ управления вторичной станцией (410, 610, 710, 810) в сети, причем вторичная станция содержит приемопередающее устройство, выполненное с возможностью одновременного приема передач (4002a, 4002b) из первой первичной станции (400a, 600a, 700a, 800a), управляющей первой сотой (401a, 601a, 701a, 801a), и передач, по меньшей мере, из одной второй первичной станции (400b, 600b, 700b, 800b), управляющей второй сотой (401b, 601b, 701b, 801b), при этом способ содержит этапы, на которых посредством вторичной станции:(a) выбирают первую матрицу предварительного кодирования для первой соты из первичного набора матриц предварительного кодирования для первой соты,(b) выбирают, в зависимости от первой матрицы предварительного кодирования в соответствии со схемой предварительного кодирования, поднабор из вторичного набора матриц предварительного кодирования для второй соты, причем поднабор состоит, по меньшей мере, из одной матрицы предварительного кодирования для второй соты,(c) выбирают вторую ...

Method and apparatus for providing efficient precoding feedback in a MIMO wireless communication system

Precoding feedback scheme based on Jacobi rotations to generate the feedback in the uplink. For a wireless communication system including a transmitter and a receiver. The system may use either a single codeword (SOW) or a double codeword (DCW). The precoding scheme is based on transmit beamforming (TxBF). Differential feedback is considered, with periodic non-differential feedback to avoid error accumulation or propagation due to differential processing.

METHOD AND APPARATUS FOR PROCESSING FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM

A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted. The feedback bits relate to non-differential or differential feedback or a combination thereof, or the feedback is a binary sign bit alone or in combination with non-differential feedback.

METHOD AND APPARATUS FOR PROCESSING FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM

A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effe ctive channel is calculated and a precoding matrix is selected. Feedback bit s are generated and transmitted. The feedback bits relate to non-differentia l or differential feedback or a combination thereof, or the feedback is a bi nary sign bit alone or in combination with non-differential feedback. ...

FEEDBACK OF CHANNEL STATE INFORMATION FOR MIMO AND SUBBAND SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM

Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state ...

CODEWORD PERMUTATION AND REDUCED FEEDBACK FOR GROUPED ANTENNAS

Systems and methodologies are described that facilitate reducing feedback required to be transmitted on a reverse link channel in response to a forward link data transmission for multiple-input multiple-output (MIMO) wireless communication systems. In a per group rate control MIMO system, a codeword can be linked to more than one layer. Codewords are mixed among antennas in the MIMO systems based upon a symmetric permutation of antennas groups. Further, codewords are transmitted in permuted form so that receivers can reduce feedback to a base channel quality indicator (CQI) and a differential CQI. Additionally, spatial diversity is increased for each codeword improving the robustness of the system against inaccurate CQI reports.

DOWNLINK TRANSMISSION IN A MULTIPLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT ("MU-MIMO") WIRELESS COMMUNICATION SYSTEM

Information transmission in a multiple-input multiple-output ("MIMO") wireless communication system is provided. In one embodiment, a method for transmitting information in a MIMO wireless communication system, comprising updating channel quality information ("CQI") values of a plurality of wireless devices, wherein updating said CQI values consider the effects of interference from transmissions to those wireless devices associated with a pre-assigned companion codeword set; pairing said plurality of wireless devices using at least said CQI values, a precoding matrix index ("PMI") value and said pre-assigned companion codeword set, wherein said pre-assigned companion codeword set, pre-assigned companion codewords associated with said pre-assigned companion codeword set and said PMI value are updated for each of said plurality of wireless devices; precoding the information for each of said plurality of wireless devices using said PMI value; and transmitting said precoded information to each ...

Feedback of channel state information for MIMO and subband scheduling in a wireless communication system

Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state ...

A method of transmitting at least one sub-packet based on feedback information in a wireless communication system

A method of transmitting subsequent sub-packets in a wireless communication system using a hybrid automatic request (HARQ) technique is disclosed. The method includes receiving feedback information from at least one receiving end, transmitting a transmit packet via at least one overhead channel, wherein the transmit packet includes information on carrier and antenna combination selected for subsequent transmission, and transmitting at least one sub-packet according to the selected carrier and antenna combination.

FEEDBACK OF CHANNEL STATE INFORMATION FOR MIMO AND SUBBAND SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM

본 발명은 차분 인코딩을 사용하여 채널 상태 정보를 효율적으로 전송하기 위한 기술들에 관한 것이다. 차분 인코딩(differential encoding)은 공간에 걸쳐, 주파수에 걸쳐, 공간 및 주파수에 걸쳐, 시간에 걸쳐, 주파수 및 시간에 걸쳐 또는 다른 결합된 차원들에 걸쳐 수행될 수 있다. 일 설계에서, 공간 상태 정보는 다수의 서브 대역들 상의 다수의 공간 채널들에 대하여 결정될 수 있다. 공간 채널들은 서로 다른 안테나들, 서로 다른 사전 코딩 벡터들 등등에 해당할 수 있다. 채널 품질 표시자(CQI) 값들은 다수의 서브 대역들 상의 다수의 공간 채널들에 대하여 획득될 수 있다. CQI 값들은 차분 CQI 정보를 획득하기 위해 다수의 공간 채널들 및 다수의 서브 대역들에 걸쳐 차분 인코딩될 수 있다. 또다른 설계에서, CQI 값들은 다수의 시간 간격들 내에 다수의 서브 대역들 상의 다수의 공간 채널들에 대하여 획득될 수 있고, 공간, 주파수 및 시간에 걸쳐 차분 인코딩될 수 있다. 차분 CQI 정보 및 공간 상태 정보는 피드백으로서 전송될 수 있다. The present invention relates to techniques for efficiently transmitting channel state information using differential encoding. Differential encoding may be performed over space, over frequency, over space and frequency, over time, over frequency and time, or over other combined dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, and so forth. Channel quality indicator (CQI) values may be obtained for multiple spatial channels on multiple subbands. CQI values may be differentially encoded across multiple spatial channels and multiple subbands to obtain differential CQI information. In another design, CQI values can be obtained for multiple spatial channels on multiple subbands within multiple time intervals and differentially encoded over space, frequency and time. The differential CQI information and spatial state information may be sent as feedback.

A method of transmitting at least one sub-packet based on feedback information in a wireless communication system

DIFFERENTIAL LINEAR ENCODING METHOD AND BASE STATION FOR SUPPORTING THE METHOD CAPABLE OF DETERMINING A PRECODING MATRIX THROUGH CODE BOOKS

PURPOSE: A differential linear encoding method and base station for supporting the method are provided to reduce interference between users and to increase the total of transfer rate. CONSTITUTION: A feedback receiving unit(240) receives sub information for adaptively updating a precoding matrix according to first channel state information, second channel information, and channel state change. A precoder(220) initializes the precoding matrix by using the first channel state information. The precoder updates the precoding matrix through sub information and second channel state information. The precoder precodes downward data to the precoding matrix. A data transmission unit(250) transmits downward data to the terminal. COPYRIGHT KIPO 2012 ...

TRANSMISSION BEAMFORMING METHOD AND APPARATUS IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING-BASED MIMO WIRELESS SYSTEM

The present invention relates to a transmission beamforming method and apparatus in an orthogonal frequency division multiplexing (OFDM)-based MIMO wireless system. In particular, the present invention relates to a transmission beamforming method in an OFDM-based MIMO wireless system and an apparatus therefor, wherein the transmission beamforming method comprises: estimating a channel from a received pilot signal, and obtaining time for the estimating channel and 2D channel correlation information of a frequency band; obtaining estimated channel information based on the channel correlation information; obtaining differential information that represents a difference between the current channel and the estimated channel and quantizing the differential information; and generating a transmission beam weight by using a predefined code book from the quantized differential information. The present invention may also provide a method and apparatus for reducing the channel quantization error and ...

DIFFERENTIAL FEEDBACK SCHEME FOR CLOSED-LOOP MIMO BEAMFORMING

A first NxM codebook of a first rank M may be used to generate a second Nx(N-M) codebook of a second rank (N-M). This second codebook is both orthogonal and complementary to the first codebook. In practice, this may reduce storage requirements in closed-loop MIMO beamforming, because the second codebook may be dynamically generated as needed by a base station and/or a mobile station. In some cases, a higher rank beamforming matrix or precoding matrix may be formed from a lower rank (e.g., one or two) beamforming matrix or precoding matrix. Also, a novel way to generate the rotation matrix is disclosed.

Delta modulation for channel feedback in transmit diversity wireless communication systems

A method is described herein for reducing the number of feedback bits needed to send channel state information over a feedback channel from a receiving unit (e.g., mobile terminal, base station) to a transmitter unit (e.g., base station, mobile terminal) in a wireless communication system. In the embodiment, the receiver unit is capable of performing the following steps: (1) receiving a pilot signal from a transmit antenna located at a transmitter unit; (2) analyzing a channel tap associated with the transmit antenna and exploiting the temporal correlations of the channel tap to generate the following (i) a delta-modulated feedback bit indicative of a real part of a complex coefficient of the channel tap associated with the transmit antenna and (ii) a delta-modulated feedback bit indicative of an imaginary part of the complex coefficient of the channel tap associated with the transmit antenna; and (3) sending the two feedback bits over a feedback channel to the transmitter unit which analyzes ...

Successive transmit beamforming methods for multiple-antenna orthogonal frequency division multiplexing (OFDM) systems

An improvement in a method of transmit beamforming between a transmitter and a receiver in an OFDM wireless system having a plurality of subcarriers for a time varying fading channel comprises performing successive beamforming for each of the plurality of subcarriers using less than complete knowledge of the previous fading blocks for the subcarriers by beamforming an adaptive codebook, C=(C1; . . . ; c2N}, of a current fading block for the subcarriers by correlating inter-frame and/or inter-subcarrier signals among the plurality of subcarriers.

Codebook construction

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having a codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each precoding matrix W satisfies W=W(1)W(2), where first matrix W(1) is chosen from first codebook (1), and second matrix W(2) is chosen from a second codebook. Other apparatuses, systems, and methods also are disclosed.

ПЕРЕСТАНОВКА КОДОВЫХ СЛОВ И УМЕНЬШЕННАЯ ОБРАТНАЯ СВЯЗЬ ДЛЯ СГРУППИРОВАННЫХ АНТЕНН

... 1. Способ, который способствует сокращению требуемой обратной связи для управления скоростью передачи данных в беспроводной связи, содержащий ! определение одного или больше группирований множества передающих антенн, ! перестановку кодовых слов потока данных в соответствии с перестановкой группирований антенн, и ! передачу переставленных кодовых слов через одно или больше группирований передающих антенн по каналу прямой линии связи. ! 2. Способ по п.1, определяющий одно или больше группирований, который содержит идентификацию активных антенн среди множества передающих антенн и игнорирование неактивных антенн при составлении одного или больше группирований. ! 3. Способ по п.2, дополнительно содержащий ! определение отношения уровня к кодовому слову, и ! ограничение размера одного или больше группирований отношением уровня к кодовому слову. ! 4. Способ по п.3, в котором каждое кодовое слово соответствует одному уровню. ! 5. Способ по п.3, в котором каждое кодовое слово соответствует двум ...

KANALSTATUSDATEN-FEEDBACK FÜR MIMO- UND SUBBAND-ZEITPLANUNGEN IN EINEM FUNKKOMMUNIKATIONSSYSTEM

DOWNLINK TRANSMISSION IN A MULTIPLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT ("MU-MIMO") WIRELESS COMMUNICATION SYSTEM

Information transmission in a multiple-input multiple-output ("MIMO") wireless communication system is provided. In one embodiment, a method for transmitting information in a MIMO wireless communication system, comprising updating channel quality information ("CQI") values of a plurality of wireless devices, wherein updating said CQI values consider the effects of interference from transmissions to those wireless devices associated with a pre-assigned companion codeword set; pairing said plurality of wireless devices using at least said CQI values, a precoding matrix index ("PMI") value and said pre-assigned companion codeword set, wherein said pre-assigned companion codeword set, pre-assigned companion codewords associated with said pre-assigned companion codeword set and said PMI value are updated for each of said plurality of wireless devices; precoding the information for each of said plurality of wireless devices using said PMI value; and transmitting said precoded information to each ...

ПЕРДАЧА MIMO С ПЕРЕСТАНОВКОЙ УРОВНЕЙ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ

Описываются методики поддержания передачи MIMO с перестановкой уровней. В одном аспекте изобретения несколько кодовых слов могут быть формированы для передачи от нескольких антенн (например, виртуальных антенн), причем количество кодовых слов меньше количества антенн. Каждое кодовое слово может быть отображено на несколько антенн. Могут быть формированы два кодовых слова. Для ранга 3 первое кодовое слово может быть отображено на один уровень (или одну антенну на каждой поднесущей), и второе кодовое слово может быть отображено на два уровня (или две антенны на каждой поднесущей). Для ранга 4 каждое кодовое слово может быть отображено на два уровня. В другом аспекте изобретения может быть определен базовый индикатор CQI, который показывает среднее качество сигнала. Также может быть определен разностный индикатор CQI, который показывает улучшение относительно среднего качества сигнала. В еще одном аспекте может быть выполнен выбор с разными штрафными коэффициентами для разных рангов или разного ...

Codebook restructure, differential encoding/decoding, and scheduling

A method and apparatus for feedback of channel information characterizing a wireless transmission between a base station and a mobile station over a communications channel. The method involves, at the base station, receiving a primary identifier identifying a cluster associated with a channel response generated by a mobile station, receiving a differential identifier identifying channel response member within the cluster identified by the primary identifier, and locating in a codebook of predetermined channel responses a predetermined channel response identified by the primary identifier and the differential identifier. The predetermined channel responses in the codebook are grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members. The method also involves generating a control signal for controlling transmissions to the mobile station in accordance with the located predetermined channel response ...

TECHNIQUES FOR MIMO BEAMFORMING FOR FREQUENCY SELECTIVE CHANNELS IN WIRELESS COMMUNICATION SYSTEMS

Method and apparatus for signaling for multi-antenna transmission with precoding

A method and apparatus for signaling for multi-antenna transmission with precoding are disclosed. Precoder phase information may be signaled using bit sequences that provide a degree of error tolerance in that precoder phases having large differences are signaled using bit sequences having large Hamming distances.

Mimo transmission with layer permutation in a wireless communication system

TECHNIQUES UTILIZING ADAPTIVE CODEBOOKS FOR BEAMFORMING IN WIRELESS NETWORKS

An embodiment of the present invention provides a method, comprising using an adaptive codebook for beamforming for communications in wireless networks.

METHOD FOR DIFFERENTIALLY QUANTIZING CHANNEL INFORMATION IN MULTIPLE ANTENNA RADIO SYSTEM AND SYSTEM ADOPTING SAME

The present invention relates to a communication method for transmitting a signal to multiple user terminals using multiple antennas in a radio communication system, and particularly to a method for differentially quantizing channel information in a multiple antenna radio system and a system adopting the same, wherein the method comprises: a main codebook feedback step of quantizing the entire range of channel correlation information of a user terminal to create a main codebook, feeding a representative value index for the main codebook back to a base station, and forming multiple eigen-beams using the representative value index for the main codebook to transmit a data signal; and a sub-codebook feedback step of differentially quantizing only a part of region of the channel correlation information on the basis of the amount of change in the channel correlation information to generate a sub-codebook, feeding a representative value index for the sub-codebook back to the base station, and ...

Method and radio communications system for signalling of channel informations

AREA CALIBRATION AND BEAMFORMING REFINEMENT

СПОСОБЫ ФОРМИРОВАНИЯ ДИАГРАММЫ НАПРАВЛЕННОСТИ МIМО ДЛЯ ЧАСТОТНО-ИЗБИРАТЕЛЬНЫХ КАНАЛОВ В СИСТЕМАХ БЕСПРОВОДНОЙ СВЯЗИ

... 1. Устройство формирования диаграммы направленности при множестве входов и множестве выходов (MIMO), содержащееприемопередатчик, приспособленный для формирования диаграммы направленности при множестве входов и множестве выходов (MIMO) и дополнительно приспособленный для осуществления связи с приемником, который передает по обратной связи упомянутому приемопередатчику множество унитарных матриц формирования диаграммы направленности на поддиапазон и интерполирует упомянутые унитарные матрицы формирования диаграммы направленности по упомянутому поддиапазону, ипричем приемник интерполирует множество унитарных матриц формирования диаграммы направленности на грассмановом многообразии в области углов.2. Устройство формирования диаграммы направленности MIMO по п.1, в котором упомянутое множество унитарных матриц формирования диаграммы направленности на поддиапазон представляет собой две унитарные матрицы формирования диаграммы направленности для каждого конца упомянутого поддиапазона.3. Устройство ...

ИНФОРМАЦИЯ ОБРАТНОЙ СВЯЗИ ОБ ИНФОРМАЦИИ О СОСТОЯНИИ КАНАЛА ДЛЯ МIМО И ПЛАНИРОВАНИЕ ПОДПОЛОСЫ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ

... 1. Устройство, содержащее !процессор, выполненный с возможностью получения индикатора качества канала (CQI) для множества пространственных каналов по множеству подполос, с возможностью дифференциального кодирования значений CQI среди множества пространственных каналов и множества подполос для получения дифференциальной информации CQI, и с возможностью передачи дифференциальной информации CQI в качестве информации обратной связи; и ! запоминающее устройство, соединенное с процессором. ! 2. Устройство по п.1, в котором процессор выполнен с возможностью дифференциального кодирования значений CQI по множеству пространственных каналов и множеству подполос относительно опорного значения CQI, и передачи опорного значения CQI с дифференциальной информацией CQI. !3. Устройство по п.2, в котором опорное значение CQI представляет собой значение CQI для назначенного пространственного канала по назначенной подполосе. ! 4. Устройство по п.2, в котором опорное значение CQI представляет собой среднее значение ...

СПОСОБ БЕСПРОВОДНОЙ СВЯЗИ (ВАРИАНТЫ), БАЗОВАЯ И МОБИЛЬНАЯ СТАНЦИИ

... 1. Способ беспроводной связи с передачей информации обратной связи о канале, характеризующей беспроводную передачу между базовой станцией и мобильной станцией по каналам передачи, содержащийполучение первичного идентификатора, идентифицирующего кластер, связанный с откликом канала, сформированный мобильной станцией;.получение дифференциального идентификатора, идентифицирующего элемент отклика канала в кластере, идентифицируемого первичным идентификатором;определение местонахождения в кодовой книге предопределенных откликов предопределенных откликов канала, при этом предопределенный отклик канала идентифицируется указанным первичным идентификатором и указанным дифференциальным идентификатором, при этом предопределенных отклики канала в кодовой книге во множество кластеров в соответствии с критерием корреляции, причем каждый кластер включает множество предопределенных элементов откликов канала; иформирование управляющего сигнала для управления передачами к мобильной станции в соответствии ...

GUIDED ALIGNMENT OF WIRELESS DEVICE ORIENTATION

Abstract Embodiments provide for guided alignment of the orientation of two wireless devices. A first wireless device is at a known position and a known orientation. A signal from a second wireless device is received via a plurality of receive elements of the first wireless device. The first wireless device measures phase differences of the signal at the plurality of receive elements, and determines locations of each of the second wireless device's transmit elements based on the differences. Based on the transmit element locations, and a known antenna layout of the second wireless device, an orientation of the second wireless device is determined. Based on differences between the determined orientation and the known orientation of the first wireless device, instructions for aligning the devices are generated. Once the devices are aligned, location estimates of a third wireless device are made by both the first wireless device and the second wireless device. 93 Date Recue/Date Received 2020 ...

FEEDBACK OF CHANNEL STATE INFORMATION FOR MIMO AND SUBBAND SCHEDULING IN A WIRELESS COMMUNICATION SYSTEM

Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state ...

MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM

Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

Efficient CQI signaling in multi-beam MIMO systems

The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams.

METHOD AND APPARATUS FOR FEEDING BACK CHANNEL STATE INFORMATION IN MASSIVE MULTIPLE INPUT MULTIPLE OUTPUT ANTENNA SYSTEM

Provided is a method by which a terminal feeds back channel state information (CSI) in a massive multiple input multiple output (MIMO) antenna system. The terminal calculates accuracy of a channel estimation value by dividing a CSI-RS (a reference signal) received from a base station by the channel estimation value. The terminal selects an update target between an angle and amplitude of the accuracy of the channel estimation value based on a standard deviation of the angle of the accuracy of the channel estimation value and a standard deviation of the amplitude of the accuracy of the channel estimation value. The terminal determines an update step size for the update target. Furthermore, the terminal transmits feedback information, including the update target and the update step size, to the base station. COPYRIGHT KIPO 2016 ...

ＷＩＦＩ 빔형성, 피드백 및 사운딩(ＷＩＢＥＡＭ)을 위한 방법

WiFi 빔형성, 피드백, 및 사운딩(WiBEAM)을 위한 방법이 기재된다. 무선 통신에서 사용하기 위한 코드북 기반의 빔형성 피드백 시그널링 및 사운딩 메커니즘이 개시된다. 여기에 기재된 방법은, 기븐스 회전 기반의 분해를 사용하고 [0,2π]의 서브세트로부터의 범위를 사용하여 기븐스 회전 기반의 분해의 결과 각도들을 양자화함으로써 피드백 효율을 개선한다. 피드백은 또한, 피드백 효율/정확도를 개선하도록 복수의 컴포넌트들로 나누어질 수 있다. 채널 가역성을 이용하면서 여전히 현실적인 무선 주파수(RF) 채널 장애를 고려하는 시간 도메인 빔형성 보고도 또한 기재된다. 비트의 중요도에 따라 피드백 비트들을 우선순위화하는 빔형성 피드백도 또한 개시된다. 개선된 채널 추정을 위해 스무딩 방법의 사용을 가능하게 할 프리앰블 구조, 코드북 기반의 빔형성 피드백에 사용될 수 있는 코드북 설계, 및 다중 해상도 명시적 피드백도 개시된다.

METHOD AND APPARATUS FOR A MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM

계층 치환을 통해 MIMO 전송을 지원하기 위한 기술들이 개시된다. 일 양상에서, 다수의 코드워드들이 다수의 안테나들(예를 들어, 가상 안테나들)로부터의 전송을 위해 생성될 수 있으며, 코드워드들의 개수는 안테나들의 개수 미만이다. 각각의 코드워드는 다수의 안테나들에 걸쳐 맵핑될 수 있다. 두 개의 코드워드들이 생성될 수 있다. 랭크 3에 대하여, 제1 코드워드가 하나의 계층(또는 각각의 서브캐리어상의 하나의 안테나)에 맵핑될 수 있으며, 제2 코드워드는 2개의 계층들(또는 각각의 서브캐리어상의 2개의 안테나들)에 맵핑될 수 있다. 랭크 4에 대하여, 각각의 코드워드는 2개의 계층들로 맵핑될 수 있다. 다른 양상에서, 평균 신호 품질을 나타내는 베이스 CQI가 결정될 수 있다. 평균 신호 품질에 대한 개선을 나타내는 델타 CQI가 또한 결정될 수 있다. 또 다른 양상에서, 코드워드들의 개수 또는 상이한 랭크들에 대한 상이한 페널티 팩터들을 이용하여 선택이 수행될 수 있다. Techniques for supporting MIMO transmission via layer substitution are disclosed. In one aspect, multiple codewords may be generated for transmission from multiple antennas (eg, virtual antennas), where the number of codewords is less than the number of antennas. Each codeword may be mapped across multiple antennas. Two codewords may be generated. For rank 3, the first codeword can be mapped to one layer (or one antenna on each subcarrier), and the second codeword is two layers (or two antennas on each subcarrier). ) Can be mapped. For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of the average signal quality may be determined. Delta CQI may also be determined, indicating an improvement to the average signal quality. In another aspect, the selection may be performed using a number of codewords or different penalty factors for different ranks.

SYSTEMS AND METHODS FOR COMMUNICATION OF CHANNEL STATE INFORMATION

Certain aspects of the present disclosure relate to a technique for communicating Channel State Information (CSI) feedback. In some aspects, the CSI feedback is communicated in a very high throughput (VHT) wireless communications system.

Codebook construction

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed.

Beamforming using base and differential codebooks

Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed.

3-D MIMO communication system, radio base station, and user equipment

A user equipment is disclosed that includes a receiver configured to receive candidates of phase rotation in a horizontal direction and candidates of phase rotation in a vertical direction for precoding. The user equipment also has a processor configured to report feedback information including a phase rotation in the horizontal direction and a phase rotation in the vertical direction to a radio base station based upon the candidates of the phase rotation in a horizontal direction and the candidates of phase rotation in a vertical direction. Additionally, the candidates of phase rotation in the horizontal direction or the candidates of phase rotation in the vertical direction are a part of predetermined candidates, the part being selected from the predetermined candidates according to a predetermined method.

MIMO transmission with layer permutation in a wireless communication system

Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple data packets are processed to generate multiple codewords for a multiple-input multiple-output (MIMO) transmission on multiple layers, with the number of codewords being less than or equal to the number of layers. Each of the multiple codewords are mapped to at least one of the multiple layers.

METHOD AND APPARATUS FOR SIGNALING FOR MULTI-ANTENNA TRANSMISSION WITH PRECODING

CODEBOOK CONSTRUCTION

Method and apparatus for bit-adaptive precoding matrix indicator feedback

A method and apparatus for performing precoding matrix indicator (PMI) feedback are provided. The apparatus may include at least one storage device containing a computer program, at least one processing circuit and related control/computing devices. The at least one processing circuit is configured with at least one storage device and computer program to feed back the selected PMI and to receive related signalings of the PMI feedback method. One of the signalings includes the precoder candidate set configuration which defines the subset of precoders in a codebook for each precoder to report PMI next time. The selected PMI is transmitted by the apparatus to the corresponding communication device in the communication network.

MEASUREMENT REPORT PAYLOAD REDUCTION TECHNIQUES

ON SUBBAND CONFIGURATION FOR REDUCED CSI COMPUTATION TIME

ИНФОРМАЦИЯ ОБРАТНОЙ СВЯЗИ ОБ ИНФОРМАЦИИ О СОСТОЯНИИ КАНАЛА ДЛЯ МIМО И ПЛАНИРОВАНИЕ ПОДПОЛОСЫ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ

FIELD: information technology. SUBSTANCE: techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency, across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennae, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback. EFFECT: efficient transmission of channel state information in a wireless communication system. 51 cl, 16 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 457 621 (13) C2 (51) МПК H04L 1/00 (2006.01) H04B 7/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2008142429/07, 26.03.2007 (24) Дата начала отсчета срока действия патента: 26.03.2007 (73) Патентообладатель(и): КВЭЛКОММ ИНКОРПОРЕЙТЕД (US) (43) Дата публикации заявки: 10.05.2010 Бюл. № 13 2 4 5 7 6 2 1 (45) Опубликовано: 27.07.2012 Бюл. № 21 (56) Список документов, цитированных в отчете о поиске: WO 2005/125044 А, 29.12.2005. RU 2002129011 А, 27.02.2004. US 2004/141466 А1, 22.07.2004. ЕР 0752779 А, 08.01.1997. WO 2006/028204 А, 16.03.2006. 2 4 5 7 6 2 1 R U (86) Заявка PCT: US 2007/064962 (26.03.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.10.2008 (87) ...

СПОСОБ БЕСПРОВОДНОЙ СВЯЗИ (ВАРИАНТЫ), БАЗОВАЯ И МОБИЛЬНАЯ СТАНЦИИ

Изобретение относится к беспроводной связи, более конкретно к обратной связи информационного канала, характеризующего беспроводную передачу между базовой станцией и мобильной станцией, и позволяет снизить непроизводительные расходы. Способ включает на базовой станции получение первичного идентификатора, идентифицирующего кластер, связанный с откликом канала, сформированным мобильной станцией, получение дифференциального идентификатора, идентифицирующего элемент отклика канала в кластере, идентифицированного первичным идентификатором, и размещение в кодовой книге предопределенных откликов предопределенного отклика канала, идентифицированных первичным идентификатором и дифференциальным идентификатором. Предопределенные отклики канала в кодовой книге группируются во множество кластеров в соответствии с критерием корреляции, при этом каждый кластер включает множество предопределенных элементов отклика канала. Способ также включает формирование управляющего сигнала для управления передачами ...

СПОСОБЫ ФОРМИРОВАНИЯ ДИАГРАММЫ НАПРАВЛЕННОСТИ МIМО ДЛЯ ЧАСТОТНО-ИЗБИРАТЕЛЬНЫХ КАНАЛОВ В СИСТЕМАХ БЕСПРОВОДНОЙ СВЯЗИ

FIELD: radio engineering, communication. SUBSTANCE: invention particularly discloses an apparatus which may include a transceiver operable as a base station (BS) in a wireless network and adapted for multiple input multiple output (MIMO) beamforming and further adapted for wireless communication with a receiver which feeds back to the transceiver a plurality of beamforming matrices per subband and interpolates the beamforming matrices across the subband. EFFECT: higher efficiency. 24 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 498 505 (13) C2 (51) МПК H04B 7/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2012105918/07, 06.07.2010 (24) Дата начала отсчета срока действия патента: 06.07.2010 (73) Патентообладатель(и): ИНТЕЛ КОРПОРЕЙШН (US) (45) Опубликовано: 10.11.2013 Бюл. № 31 2 4 9 8 5 0 5 (56) Список документов, цитированных в отчете о поиске: WO 2007/127744 А1, 08.11.2007. US 2007206626 A1, 06.09.2007. US 2006056531 A1, 16.03.2006. US 2007104163 A1, 10.05.2007. US 2006165008 A1, 27.07.2006. US 2006071807 A1, 06.04.2006. RU 2238611 C1, 20.10.2004. 2 4 9 8 5 0 5 R U (86) Заявка PCT: US 2010/041027 (06.07.2010) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 20.02.2012 (87) Публикация заявки РСТ: WO 2011/011192 (27.01.2011) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБЫ ФОРМИРОВАНИЯ ДИАГРАММЫ НАПРАВЛЕННОСТИ МIМО ДЛЯ ЧАСТОТНО-ИЗБИРАТЕЛЬНЫХ КАНАЛОВ В СИСТЕМАХ БЕСПРОВОДНОЙ СВЯЗИ (57) Реферат: Изобретение относится к области беспроводной связи и предназначено для повышения производительности. Изобретение раскрывает, в частности, устройство, которое может включать в себя приемопередатчик, функционирующий как базовая станция (BS) в беспроводной сети, и приспособленный для формирования диаграммы направленности в системе многих входов и многих выходов (MIMO), и дополнительно приспособленный для ...

System and method of wireless communication

CHANNEL STATUS DATA FEEDBACK FOR MIMOUND SUBBANDZEITPLANUNGEN IN A RADIO COMMUNICATION SYSTEM

Transmission control method

The embodiments of the present invention relate to a data transmission method. The method specifically comprises: a terminal sending, according to a first format of uplink control information (UCI), the UCI to a radio access network device, wherein the UCI sent in the first format comprises: at least one piece of measurement result information about a beam group and information about the beam group; the beam group comprises: a first beam group and a second beam group; the measurement information about the beam group comprises: a measurement result of the first beam group and an offset of a measurement result of the second beam group relative to the measurement result of the first beam group; the measurement result of the first beam group is a reference measurement result; the information about the beam group is used for indicating a beam group corresponding to at least one of the measurement result of the first beam group and the measurement result of the second beam group; and the beam ...

LOW OVERHEAD PMI AND CQI FEEDBACK AND PAIRING SCHEMES FOR MU-MIMO

Searching for a pairing PMI including estimating a MIMO wireless propagation channel from an access point transmitter to a receiver at a UE is provided; including quantizing the estimated channel with a codebook consisting of multiple codewords, the result being SU-MIMO PMI currently applicable to the UE; estimating the channel quality corresponding to the actual SU-MIMO PMI, resulting in at least one CQI for the UE; constructing multiple subsets from a codebook of codewords, each subset comprises potential MU-MIMO PMIs that represent channels that have reduced interference with a channel represented by one of the potential SU-MIMO PMIs; associating each potential SU-MIMO PMI with the subset that comprises the potential MU-MIMO PMIs that represent channels that have reduced interference with the channel represented by that potential SU-MIMO PMI; searching for an appropriate pairing PMI and associated CQI for the UE.

TECHNIQUES UTILIZING STEP SIZE ADAPTATION FOR DIFFERENTIAL BEAMFORMING IN WIRELESS NETWORKS

본 발명의 실시예는 복수의 피드백들에 걸쳐 가변 차등 코드북을 사용함으로써 차등 피드백을 제공하는 단계를 포함하는 송신 빔형성에서 사용되는 방법을 제공하며, 차등 코드북은 피드백들에 걸쳐 서로 다른 형상, 및/또는 스팬, 및/또는 코드워드들의 수를 가질 수 있다. Embodiments of the present invention provide a method used in transmit beamforming comprising providing differential feedback by using a variable differential codebook over a plurality of feedbacks, the differential codebook having a different shape across the feedbacks, and And / or span, and / or number of codewords.

METHOD AND APPARATUS FOR SIGNALING FOR MULTI-ANTENNA TRANSMISSION WITH PRECODING

A method and apparatus for signaling for multi - antenna transmission with precoding are disclosed. Precoder phase information may be signaled using bit sequences that provide a degree of error tolerance in that precoder phases having large differences are signaled using bit sequences having large Hamming distances. A method comprising: receiving at a wireless transmit/receive unit (WTRU) a precoding indicator signal representing a sequence of signaling bits corresponding to a desired precoder phase value; obtaining the desired precoder phase value by comparing the sequence of signaling bits to a plurality of predetermined sequences of signaling bits in which pairs of predetermined sequences of signaling are opposites of each other and which correspond to precoder phase values that differ by 180 degrees; and, applying a set of weighting values to a WTRU uplink signal stream transmitted over multiple antennas where the set of weighting values have a phase differential equal to the desired ...

CONSTANT MODULUS MIMO PRECODING FOR CONSTRAINING TRANSMIT ANTENNA POWER FOR DIFFERENTIAL FEEDBACK

A method and apparatus for constraining power amplifier (PA) imbalance includes using a constant modulus (CM) criterion to ensure PA balance when using differential feedback.

CODEWORD PERMUTATION AND REDUCED FEEDBACK FOR GROUPED ANTENNAS

Systems and methodologies are described that facilitate reducing feedback required to be, transmitted on a reverse link channel in response to a forward link data transmission for multiple-input multiple-output (MIMO) wireless communication systems. In a per group rate control MIMO system, a codeword can be linked to more than one layer. Codewords are mixed among antennas in the MIMO systems based upon a symmetric permutation of antennas groups. Further, codewords are transmitted in permuted form so that receivers can reduce feedback to a base channel quality indicator (CQI) and a differential CQI. Additionally, spatial diversity is increased for each codeword improving the robustness of the system against inaccurate CQI reports.

Communication station and method for efficiently providing channel feedback for MIMO communications

Embodiments of a communication station and methods for efficiently providing channel feedback for MIMO communications over an OFDM channel are generally described herein. In some embodiments, receiving stations may perform a recursive differential quantization of channel information across time and/or frequency to generate quantized differential channel feedback. The quantized differential channel feedback from each receiving station may be used by a transmitting station to precode MIMO transmissions to one or more of the receiving stations. The quantized differential channel feedback may be either a quantized differential channel matrix or a quantized differential beamforming matrix.

Method of transmitting at least one sub-packet based on feedback information in a wireless communication system

A method of transmitting subsequent sub-packets in a wireless communication system using a hybrid automatic request (HARQ) technique is disclosed. The method includes receiving feedback information from at least one receiving end, transmitting a transmit packet via at least one overhead channel, wherein the transmit packet includes information on carrier and antenna combination selected for subsequent transmission, and transmitting at least one sub-packet according to the selected carrier and antenna combination.

Method of transmitting feedback message in wireless communication system

A method of transmitting a feedback message in wireless communication system is provided. The method includes selecting N best subbands of M subbands according to CQI, where both M and N are a natural number and M is larger than N, generating multiple input multiple output (MIMO) information comprising N codebook indexes and N differential CQIs and transmitting the feedback message comprising the MIMO information.

METHOD OF PERFORMING BEAM REPORTING AND USER EQUIPMENT

A method of performing beam reporting in a wireless communication system is disclosed including receiving, with a user equipment (UE), multiple Transmission (Tx) beams used for transmission of reference signals (RSs) from a base station (BS), and performing, with the UE, first beam reporting to the BS. The first beam reporting indicates the Tx beams divided into groups based on a first predetermined grouping type. When the receiving simultaneously receives first Tx beams of the multiple Tx beams, the first Tx beams are divided into a same group based on the first predetermined grouping type. When the receiving simultaneously receives first Tx beams of the multiple Tx beams, the first Tx beams are divided into different groups based on the first predetermined grouping type.

CHANNEL STATE INFORMATION OPERATIONS FOR ULTRA-RELIABLE LOW LATENCY COMMUNICATIONS

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine to report first channel state information (CSI), wherein the first CSI is associated with a parameter that indicates a priority of the first CSI. The UE may prioritize the first CSI over a second CSI based at least in part on the parameter. The UE may transmit an indication of the first CSI and may drop the second CSI based at least in part on prioritizing the first CSI over the second CSI. Numerous other aspects are provided. 1. A method of wireless communication performed by a user equipment (UE) , comprising:determining to report first channel state information (CSI), wherein the first CSI is associated with a parameter that indicates a priority of the first CSI;prioritizing the first CSI over second CSI based at least in part on the parameter; andtransmitting an indication of the first CSI and dropping the second CSI based at least in part on prioritizing the first CSI over the second CSI.2. The method of claim 1 , wherein the parameter indicates at least one of:a service type associated with the first CSI,a reliability requirement associated with the first CSI,a latency requirement associated with the first CSI,a component carrier index associated with the first CSI,whether the first CSI is periodic CSI or aperiodic CSI,a subframe set associated with the first CSI,a CSI reporting type associated with the first CSI, orsome combination thereof.3. The method of claim 2 , wherein the service type includes an enhanced mobile broadband (eMBB) service type or an ultra-reliable low latency communications (URLLC) service type.4. The method of claim 2 , wherein the CSI reporting type includes at least one of a channel quality indicator (CQI) claim 2 , a precoding matrix indicator (PMI) claim 2 , a CSI reference signal (CSI-RS) resource indicator (CRI) claim 2 , a strongest layer indicator (SLI) claim 2 , a rank indication (RI) claim 2 ...

MIMO transmission with layer permutation in a wireless communication system

Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

СИСТЕМА БЕСПРОВОДНОЙ СВЯЗИ, БАЗОВАЯ СТАНЦИЯ, ТЕРМИНАЛ И СПОСОБ ГЕНЕРАЦИИ КОДОВОЙ КНИГИ

FIELD: radio engineering, communication. SUBSTANCE: invention relates to a wireless communication system comprising a base station and terminal using a generated codebook. The device and method of generating a codebook in a wireless communication system with multiple antenna arrays use said codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good accuracy of feedback for a multielement antenna array is maintained. EFFECT: high accuracy of feedback for a multielement antenna array. 20 cl, 1 tbl, 13 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 557 462 C2 (51) МПК H03M 13/00 (2006.01) H04B 7/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012139265/08, 15.03.2011 (24) Дата начала отсчета срока действия патента: 15.03.2011 Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 27.04.2014 Бюл. № 12 (73) Патентообладатель(и): Панасоник Интеллекчуал Проперти Корпорэйшн оф Америка (US) (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.10.2012 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: CN 101611569 A, 23.12.2009. RU 2335845 C2, 10.10.2008. RU 2191471 C2, 20.10.2002. RU 2367089 C2, 10.09.2009. WO 2009/ 002093 A2, 31.12.2008. WO 2008/052191 A2, 02.05.2008. WO 2009/131092 A2, 29.10.2009. US 2008/0272953 A1, 06.11.2008. CN 101345530 A, 14.01.2009 (86) Заявка PCT: 2 5 5 7 4 6 2 CN 2011/071812 (15.03.2011) R U 2 5 5 7 4 6 2 (45) Опубликовано: 20.07.2015 Бюл. № 20 R U 16.03.2010 CN 201010125169.1; 06.05.2010 CN 201010164379.1 (72) Автор(ы): ТУН Хуэй (CN), ХОСИНО Масаюки (JP), СЮЙ Мин (CN), НАКАО Сейго (JP), ИМАМУРА Даити (JP) (87) Публикация заявки PCT: WO 2011/113344 (22.09.2011) Адрес ...

СПОСОБ СИГНАЛИЗАЦИИ ПРЕДВАРИТЕЛЬНОГО КОДИРОВАНИЯ В РЕЖИМЕ ПЕРЕДАЧИ С СОВМЕСТНЫМ ФОРМИРОВАНИЕМ ДИАГРАММЫ НАПРАВЛЕННОСТИ

Изобретение относится к технике связи и может использоваться для управления вторичной станцией в сети. Технический результат состоит в повышении пропускной способности передачи. Для этого вторичная станция содержит приемопередающее устройство, выполненное с возможностью одновременного приема передач из первичной станции, управляющей первой сотой, и, по меньшей мере, одной первичной станции, управляющей второй сотой, при этом выбирают первую матрицу предварительного кодирования для первой соты из первичного набора матриц предварительного кодирования для первой соты, выбирают поднабор из матрицы предварительного кодирования для второй соты в зависимости от первой матрицы предварительного кодирования, из набора поднаборов матриц предварительного кодирования для второй соты, выбирают вторую матрицу предварительного кодирования для второй соты из выбранного поднабора матриц предварительного кодирования для второй соты, передают первый индикатор, характеризующий первую матрицу предварительного ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОБЕСПЕЧЕНИЯ ЭФФЕКТИВНОЙ ОБРАТНОЙ СВЯЗИ С ПРЕДВАРИТЕЛЬНЫМ КОДИРОВАНИЕМ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ MIMO

... 1. Способ обеспечения обратной связи с предварительным кодированием, при этом способ содержит этапы, на которых: ! принимают биты обратной связи, при этом биты обратной связи представляют изменения или различия параметров матричного преобразования; ! обновляют первую матрицу предварительного кодирования на основе битов обратной связи и ! предварительно кодируют множество потоков данных частотной области с использованием первой матрицы предварительного кодирования. ! 2. Способ по п.1, дополнительно содержащий этапы, на которых: ! принимают множество потоков данных временной области, причем каждый поток данных временной области включает в себя циклический префикс (СР); !удаляют СР из потоков данных временной области, чтобы сгенерировать множество обработанных потоков данных; ! преобразуют обработанные потоки данных в данные частотной области; ! осуществляют канальное оценивание на данных частотной области, чтобы сгенерировать канальную оценку; ! генерируют вторую матрицу предварительного ...

Method and apparatus for providing efficient precoding feedback in a MIMO wireless communication system

TRANSMISSION CONTROL METHOD

The embodiments of the present invention relate to a data transmission method. The method specifically comprises: a terminal sending, according to a first format of uplink control information (UCI), the UCI to a radio access network device, wherein the UCI sent in the first format comprises: at least one piece of measurement result information about a beam group and information about the beam group; the beam group comprises: a first beam group and a second beam group; the measurement information about the beam group comprises: a measurement result of the first beam group and an offset of a measurement result of the second beam group relative to the measurement result of the first beam group; the measurement result of the first beam group is a reference measurement result; the information about the beam group is used for indicating a beam group corresponding to at least one of the measurement result of the first beam group and the measurement result of the second beam group; and the beam ...

LOW OVERHEAD PMI AND CQI FEEDBACK AND PAIRING SCHEMES FOR MU-MIMO

Searching for a pairing PMI including estimating a MIMO wireless propagation channel from an access point transmitter to a receiver at a UE is provided; including quantizing the estimated channel with a codebook consisting of multiple codewords, the result being SU-MIMO PMI currently applicable to the UE; estimating the channel quality corresponding to the actual SU-MIMO PMI, resulting in at least one CQI for the UE; constructing multiple subsets from a codebook of codewords, each subset comprises potential MU-MIMO PMIs that represent channels that have reduced interference with a channel represented by one of the potential SU-MIMO PMIs; associating each potential SU-MIMO PMI with the subset that comprises the potential MU-MIMO PMIs that represent channels that have reduced interference with the channel represented by that potential SU-MIMO PMI; searching for an appropriate pairing PMI and associated CQI for the UE.

CODEBOOK RESTRUCTURE, DIFFERENTIAL ENCODING/DECODING, AND SCHEDULING

A method and apparatus for feedback of channel information characterizing a wireless transmission between a base station and a mobile station over a communications channel. The method involves, at the base station, receiving a primary identifier identifying a cluster associated with a channel response generated by a mobile station, receiving a differential identifier identifying channel response member within the cluster identified by the primary identifier, and locating in a codebook of predetermined channel responses a predetermined channel response identified by the primary identifier and the differential identifier. The predetermined channel responses in the codebook are grouped in a plurality of clusters in accordance with a correlation criterion, each cluster including a plurality of predetermined channel response members. The method also involves generating a control signal for controlling transmissions to the mobile station in accordance with the located predetermined channel response ...

METHOD AND APPARATUS FOR PROVIDING EFFICIENT PRECODING FEEDBACK IN A MIMO WIRELESS COMMUNICATION SYSTEM

Precoding feedback scheme based on Jacobi rotations to generate the feedback in the uplink. For a wireless communication system including a transmitter and a receiver. The system may use either a single codeword (SCW) or a double codeword (DCW). The precoding scheme is based on transmit beamforming (TxBF). Differential feedback is considered, with periodic on-differential feedback to avoid error accumulation or propagation due to differential processing.

Method and device for transmitting feedback information in MIMO (multiple input multiple output) communication system

코드북 구성

... 무선 통신 시스템에서 사용되는 기지국에서 구현되는 방법이 개시된다. 상기 방법은 4TX(4 transmit) 안테나 송신을 위한 1-계층, 2-계층, 3-계층, 및 4-계층 코드북을 구비하는 단계로서, 각각의 코드북은 복수의 프리코딩 행렬들을 포함하는 상기 구비하는 단계와, 상기 복수의 프리코딩 행렬들의 하나로 데이터를 프리코딩하는 단계와, 사용자 장비에게 상기 프리코딩된 데이터를 송신하는 단계를 포함하며, 상기 1-계층 및 2-계층 코드북들은 제 1 코드북 및 제 2 코드북을 포함하고, 상기 제 1 코드북 내의 각 프리코딩 행렬은 제 1 인덱스 및 제 2 인덱스를 포함한다. 다른 장치, 시스템, 및 방법이 또한 개시된다.

초저 레이턴시(ULL) LTE에서 채널 상태 정보(CSI)를 핸들링하기 위한 기술들

... 롱텀 에볼루션(LTE) 디바이스들에서 초저 레이턴시(ULL)를 위해 채널 상태 정보(CSI)를 핸들링하기 위한 기술들이 제시된다. 예를 들어, CSI를 네트워크 엔티티에 리포팅하는 예시적인 방법이 제시된다. 그러한 예시적인 방법은, CSI를 네트워크 엔티티에 리포팅하기 위한 CSI 리포팅 트리거를 검출하는 단계, 및 CSI 리포팅 트리거의 검출에 기초하여, CSI가 생성될 서브프레임 영역을 식별하는 단계를 포함할 수도 있다. 일 양상에서, 서브프레임 영역은 복수의 서브프레임 영역들에 포함되며, 여기서, 복수의 서브프레임 영역들의 각각의 서브프레임 영역은 서브프레임의 적어도 하나의 심볼을 포함한다. 부가적인 양상에서, 예시적인 방법은, 서브프레임 영역에 기초하여 CSI를 생성하는 단계 및 CSI를 네트워크 엔티티에 송신하는 단계를 포함할 수도 있다.

CLOSED-LOOP MIMO IN WIRELESS COMMUNICATION SYSTEM

The present invention relates to feedback channel information in wireless communication system.

Method And Device For Delivering Pre-Coding Efficient Feedback In A Wireless Communication System Mime

METHOD AND APPARATUS FOR MULTIPLE-INPUT MULTIPLE-OUTPUT FEEDBACK GENERATION

Disclosed are a method and apparatus for generating feedback in multiple-input/multiple-output (MIMO) communications. Feedback is used to update a precoding matrix ...

METHOD AND APPARATUS FOR PROCESSING FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM

A method and apparatus for processing feedback implemented in a wireless transmit/receive unit (WTRU) comprises estimating a channel matrix. The effective channel is calculated and a precoding matrix is selected. Feedback bits are generated and transmitted.

A BEAMFORMING METHOD FOR WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR PERFORMING THE SAME

An improvement in a method of transmit beamforming between a transmitter (16) and a receiver (18) for a time varying lading channel comprises the step of performing transmit beamforming using less than complete knowledge of the previous fading blocks to design a codebook (26a) of a current fading block with each time frame. One embodimnet comprsies a successive beamforming algorithm and a second embodiment comprisess a vector quantization beamforming algorithm. A fading parameter α is determined at least in the transmitter or receiver by monitoring a mobile Doppler frequency.

Beamforming using base and differential codebooks

Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed.

Setting uplink antenna transmission weights in soft handover

User equipment, a computer program product and method of setting antenna transmission weightings of user equipment in a wireless telecommunication network. The user equipment (UE1) is operable to transmit on at least two antenna and communicate with at least two base stations (NB1,NB2,NB3) in its active set. The method employed by the user equipment and computer program product comprises the steps of: receiving an indication of preferred antenna transmission weightings (W1,W2,W3) from at least two base stations in said active set associated with said user equipment, calculating from said received indications of preferred antenna transmission weightings, an indication of compromise antenna transmission weightings which minimise the difference between said indication of compromise antenna transmission weightings and said indication of preferred antenna transmission weightings received from the base stations in said active set; and setting said antenna transmission weightings in accordance ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОБЕСПЕЧЕНИЯ ЭФФЕКТИВНОЙ ОБРАТНОЙ СВЯЗИ С ПРЕДВАРИТЕЛЬНЫМ КОДИРОВАНИЕМ В СИСТЕМЕ БЕСПРОВОДНОЙ СВЯЗИ MIMO

Изобретение относится к технике связи. Технический результат состоит в повышении надежности связи. Для этого в системе (MIMO) используются предварительное кодирование и обратная связь в системе беспроводной связи, включающей в себя передатчик и приемник. Система может использовать либо единичное кодовое слово (SCW), либо двойное кодовое слово (DCW). Схема предварительного кодирования базируется на формировании диаграммы направленности передачи (T×BF). Рассматривается комбинированная дифференциальная и недифференциальная обратная связь с периодической переустановкой. 3 н. и 7 з.п. ф-лы, 12 ил., 2 табл.

СИСТЕМА БЕСПРОВОДНОЙ СВЯЗИ, БАЗОВАЯ СТАНЦИЯ, ТЕРМИНАЛ И СПОСОБ ГЕНЕРАЦИИ КОДОВОЙ КНИГИ

... 1. Способ генерации кодовой книги в системе беспроводной связи со множеством антенных решеток, содержащий этапы, на которых:обеспечивают основную кодовую книгу, которая содержит множество матриц предварительного кодирования; иназначают сдвиги фазы определенным матрицам предварительного кодирования в основной кодовой книге для формирования кодовой книги со сдвигом фазы.2. Способ генерации кодовой книги по п.1, в котором этап назначения сдвигов фазы определенным матрицам предварительного кодирования в основной кодовой книге дополнительно содержит этапы, на которых:определяют в основной кодовой книге пару матриц предварительного кодирования, имеющих высокую корреляцию; иназначают сдвиг фазы двум матрицам предварительного кодирования, содержащимся в данной паре матриц предварительного кодирования, согласно корреляции между двумя матрицами предварительного кодирования, так что чем выше корреляция между двумя матрицами предварительного кодирования, тем больше назначенный сдвиг фазы.3. Способ ...

MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM

Techniques for supporting MIMO transmission with layer permutation are de scribed. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewor ds being less than the number of antennas. Each codeword may be mapped acros s the multiple antennas. Two codewords may be generated. For rank 3, the fir st codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In anot her aspect, a base CQI indicative of an average signal quality may be determ ined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed wi th different penalty factors for different ranks or number of codewords. ...

MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM

Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

CODEBOOK CONSTRUCTION

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed.

Terminal device and transmission method

METHOD AND APPARATUS FOR A MIMO TRANSMISSION WITH LAYER PERMUTATION IN A WIRELESS COMMUNICATION SYSTEM

data transfer method using phase-shift based precoding and transmitter implementing the same

CONSTANT MODULUS MIMO PRECODING FOR CONSTRAINING TRANSMIT ANTENNA POWER FOR DIFFERENTIAL FEEDBACK

A method and apparatus for constraining power amplifier (PA) imbalance includes using a constant modulus (CM) criterion to ensure PA balance whe using differential feedback. An approach of combined differential and non- differential feedback is considered.

Systems and methods for communication of channel state information

Certain aspects of the present disclosure relate to a technique for communicating Channel State Information (CSI) feedback. In some aspects, the CSI feedback is communicated in a very high throughput (VHT) wireless communications system.

DELTA CHANNEL STATE INFORMATION REPORTING

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may receive a configuration associated with reporting delta channel state information (CSI). The first wireless communication device may compute the delta CSI based at least in part on the configuration, the delta CSI indicating a difference between first CSI associated with a first connection and second CSI associated with a second connection, the first connection being between the first wireless communication device and a base station and the second connection being between the first wireless communication device and a second wireless communication device. The first wireless communication device may transmit, based at least in part on the configuration, a CSI report including an indication of the delta CSI and at least one of an indication of the first CSI or an indication of the second CSI. Numerous other aspects are described.

Dual indicator and dual codebook MIMO feedback

In a multi-antenna communication system such as a multiple-input-multiple-output (MIMO) system, a receiver uses channel state information (CSI) to determine the optimal element, CQ1of a first codebook which is stored in both the transmitter and the receiver. The optimal element is the element of the first codebook with minimum distance from an aggregation of the strongest eigenvectors of the received signal (see equations 2-4). The receiver also determines the optimal element of a second codebook, DQ2. This is the element which, when combined with the element of the first codebook, produces transmitter precoding which maximizes a channel quality metric (CQI). The receiver sends the transmitter a first indicator,Q1, identifying the optimal element of the first codebook, CQ1. and a second indicator, Q2, identifying the optimal element of the second codebook, DQ2.This information is used by the transmitter to precode future transmissions. The codebook determination is thus separated into two ...

METHOD AND AN APPARATUS FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION IN A WIRELESS PACKET DATA COMMUNICATION SYSTEM, PARTICULARLY FOR REDUCING OVERHEADS IN A WIRELESS PACKET DATA COMMUNICATION SYSTEM WHICH SUPPORTS BOTH A SINGLE USER MIMO MODE AND A MULTI-USER MIMO MODE

PURPOSE: A method and an apparatus for transmitting and receiving feedback information in a wireless packet data communication system are provided to increase the efficiency of resource management by enabling an AN(Access Node) to select a single user MIMO mode and a multi-user MIMO mode dynamically. CONSTITUTION: An AT(Access Terminal) in a wireless packet data communication system which supports both a single user MIMO mode and a multi-user MIMO mode comprises a channel estimator(22), a CQI(Channel Quality Indicator) predictor(23), an absolute CQI feedback signal generator(24), a relative CQI feedback signal generator(25), and a controller(26). Using a pilot signal received from an AN, the channel estimator estimates a channel for the single user MIMO mode and a channel for the multi-user MIMO mode. Based on the estimated channels, the CQI predictor calculates channel information for the single user MIMO mode and the multi-user MIMO mode. The absolute CQI feedback signal generator creates ...

Method and System for an Alternating Delta Quantizer for Limited Feedback MIMO Pre-Coders

Aspects of a method and system for an alternating delta quantizer for limited feedback MIMO pre-coders may comprise quantizing a change in channel state information in a MIMO pre-coding system onto at least a first and a second codebook, each of which comprises one or more unitary matrices, using a cost function; feeding back, in an alternating manner, an index to an element of at least the first codebook or the second codebook, associated with the quantizing, from a receiver to a transmitter in said MIMO pre-coding system, and generating the at least first and second codebook based on at least the channel state information. The channel state information may be a matrix V and the cost function may be defined by the following relationship: f  ( A ) = ( 1 N  ∑ j = 1 N   a jj  2 ) where A is a matrix of size N by N and a ij is element (i,j) of matrix A.

Successive transmit beamforming methods for multiple-antenna orthogonal frequency division multiplexing (ofdm) systems

An improvement in a method of transmit beamforming between a transmitter and a receiver in an OFDM wireless system having a plurality of subcarriers for a time varying fading channel comprises performing successive beamforming for each of the plurality of subcarriers using less than complete knowledge of the previous fading blocks for the subcarriers by beamforming an adaptive codebook, C=(C 1 ; . . . ; c 2 N }, of a current fading block for the subcarriers by correlating inter-frame and/or inter-subcarrier signals among the plurality of subcarriers.

Method of generating adaptive codebook and multiple input multiple output communication system using the adaptive codebook

Provided is a method of generating an adaptive codebook and a multiple input multiple output (MIMO) communication system using the adaptive codebook. A transmitter and a receiver may generate, from a base codebook based on a matrix associated with statistics of a channel matrix, the adaptive codebook maintaining a unitary characteristic. The transmitter may perform scheduling, transmit filter design, and precoding using adaptive codebook based feedback information.

Method and apparatus for obtaining precoding matrix indicator

The present disclosure discloses a method and an apparatus for obtaining a precoding matrix indicator, and relates to the field of communication technologies. The method includes: obtaining a first rotation matrix according to first channel information; obtaining a first differential matrix according to the first rotation matrix and a currently-obtained instantaneous beam forming matrix/precoding matrix; and quantizing, according to a first differential codebook, a pre-acquired first rank indicator, and preset quantization criteria, the first differential matrix to obtain a differential precoding matrix indicator. The apparatus includes: a first rotation matrix obtaining module, a first differential matrix obtaining module, and a differential precoding matrix indicator obtaining module. In the present disclosure, the differential PMI is obtained according to the channel information, and the differential PMI is used for feedback, which not only reduces an overhead, but also improves feedback accuracy.

Beamforming using base and differential codebooks

Embodiments of methods and apparatus for determining and/or quantizing a beamforming matrix are disclosed. In some embodiments, the determining and/or quantizing of the beamforming matrix may include the use of a base codebook and a differential codebook. Additional variants and embodiments are also disclosed.

Transmission control

User equipment, a computer program product and method of setting antenna transmission weightings of user equipment in a wireless telecommunication network. The user equipment (vE 1 ) is operable to transmit on at least two antenna and communicate with at least two base stations (NB 1 , NB 2 ) in its active set. The method employed by the user equipment and computer program product comprises the steps of: receiving an indication of preferred antenna transmission weightings (W 1 ,W 2 ) from at least two base stations in said active set associated with said user equipment, calculating from said received indications of preferred antenna transmission weightings, an indication of compromise antenna transmission weightings which minimise the difference between said indication of compromise antenna transmission weightings and said indication of preferred antenna transmission weightings received from the base stations in said active set and setting said antenna transmission weightings in accordance with said calculated indication of compromise antenna transmission weightings.

Mimo beamforming method and method of constructing a differential codebook for a wireless network

A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at the subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network.

Method for wifi beamforming,feedback, and sounding (wibeam)

Methods for WiFi beamforming, feedback, and sounding (WiBEAM) are described. Codebook based beamforming feedback signaling and sounding mechanisms for use in wireless communications are disclosed. The methods described herein improve the feedback efficiency by using Givens rotation based decompositions and quantizing the resulting angles of the Givens rotation based decompositions using a range from a subset of [0, 2π]. Feedback may also be divided into multiple components to improve feedback efficiency/accuracy. Time domain beamforming reports for taking advantage of channel reciprocity while still taking into account practical radio frequency (RF) channel impairments are also described. Beamforming feedback that prioritizes the feedback bits in accordance with the significance of the bits is also disclosed. A preamble structure to enable the use of smoothing methods for improved channel estimation, codebook designs that may be used for codebook based beamforming feedback, and multi-resolution explicit feedback are disclosed as well.

Differential reporting for beam groups or antenna panel groups

A method comprises: configuring multiple reporting modes for multi-level based transmitter (TX) beam index reporting for a particular beam/antenna panel group from a plurality of beam/antenna groups, wherein the multiple reporting modes includes at least one of a full reporting mode configuration for the particular beam/antenna panel group, a full reporting mode configuration common for the plurality of beam/antenna panel groups, a differential reporting mode, and a partial reporting mode, selecting a reporting mode from the multiple reporting modes, and sending a report based on the selected reporting mode.

COMMUNICATION APPARATUS AND COMMUNICATION METHOD

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. 1. A communication apparatus comprising:circuitry which, in operation, stores a plurality of extended precoding matrices; anda receiver which, in operation, receives control information including a precoding matrix indicator (PMI) that identifies an extended precoding matrix selected from the plurality of extended precoding matrices;{'sub': m', 'm, 'wherein the extended precoding matrix is generated by combining a first precoding matrix (w) and a second precoding matrix, the first precoding matrix (w) including four elements having m times 2π/32 of a phase difference between each element, and the second precoding matrix being generated by multiplexing the first precoding matrix with a phase offset, wherein m is an integer.'}2. The communication apparatus according to claim 1 , wherein phases of each element of the first precoding matrix (w) are 0 claim 1 , 2π32×m claim 1 , 4π/32×m and 6π/32×m.3. The communication apparatus according to claim 1 , wherein the first precoding matrix (w) is selected from 32 precoding matrices.4. The communication apparatus according to claim 1 , wherein the extended precoding matrix includes a matrix having a size of 1 by 8.5. The communication apparatus according to claim 1 , wherein the phase offset is selected ...

THROUGHPUT OPTIMIZATION BY GUARD INTERVAL SELECTION FROM BEAMFORMING FEEDBACK

This disclosure provides systems, methods and apparatus for wireless communication. In one aspect, a method of wireless communication includes utilizing a sounding procedure to obtain compressed beamforming (CBF) information. The sounding procedure may be a single-user or multi-user sounding procedure. The CBF information may contain various information regarding a particular channel that an access point may use for transmission. The information may include per-tone SNR information which may be processed to determine characteristics of the channel. Various techniques may be utilized to determine the further characteristics of the channel. The determined characteristics of the channel may then be used to determine an appropriate guard interval (GI) between symbols that are to be transmitted. Appropriate GI selection in wireless communications may facilitate higher throughput while decreasing overhead due to unnecessary idle time. 1. An apparatus for wireless communication , comprising:a processor;memory in electronic communication with the processor; and obtain compressed beamforming (CBF) information from one or more stations (STAs) as part of a sounding procedure, the CBF information comprising signal-to-noise ratio (SNR) information for a channel;', 'determine a guard interval (GI) based at least in part on the SNR information for the channel;', 'transmit a plurality of orthogonal frequency-division multiplexing (OFDM) symbols utilizing the determined GI;', 'obtain an indication of frequency variation within a per-tone SNR information using a fast Fourier transform (FFT) of the per-tone SNR information; and', 'determine a delay spread based on the indication of frequency variation within the per-tone SNR information., 'instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to2. (canceled)3. The apparatus of claim 1 , wherein the instructions are further executable by the processor to:compare the determined delay ...

USER TERMINAL AND RADIO COMMUNICATION METHOD

A terminal is disclosed including a transmitter that transmits information regarding at least one reception power (RSRP: Reference Signal Received Power) and a processor that, when reporting of a first RSRP and a second RSRP is carried out, controls to transmit a value corresponding to the first RSRP, and a value corresponding a difference between the first RSRP and the second RSRP. In other aspects, a radio communication method is disclosed. 16.-. (canceled)7. A terminal comprising:a transmitter that transmits information regarding at least one reception power (RSRP: Reference Signal Received Power); anda processor that, when reporting of a first RSRP and a second RSRP is carried out, controls to transmit a value corresponding to the first RSRP, and a value corresponding a difference between the first RSRP and the second RSRP.8. The terminal according to claim 7 , wherein the first RSRP has a largest measured value out of the measured RSRPs.9. The terminal according to claim 7 , wherein the processor determines a number of reporting RSRPs based on information notified by a base station.10. The terminal according to claim 8 , wherein the processor determines a number of reporting RSRPs based on information notified by a base station.11. The terminal according to claim 7 , wherein the processor coupled to the transmitter carries out reporting of the RSRP based on at least one channel state information reference signal resource.12. The terminal according to claim 8 , wherein the processor coupled to the transmitter carries out reporting of the RSRP based on at least one channel state information reference signal resource.13. The terminal according to claim 9 , wherein the processor coupled to the transmitter carries out reporting of the RSRP based on at least one channel state information reference signal resource.14. The terminal according to claim 11 , further comprising: a receiver that receives the channel state information reference signal with a predetermined ...

Efficient cqi signaling in multi-beam mimo systems

The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams.

SYSTEMS AND METHODS FOR RF-BASED MOTION SENSING AND EVENT DETECTION

A system described herein may determine transformations, differences, variations, etc. in radio frequency (“RF”) waveforms sent by a device in order to detect motion-based events. Models associated with the differences in such RF waveforms may be used to identify particular types of events, such as the presence of an individual in a room or other area, a type of motion, or other types of events. An interval or rate at which the device outputs RF waveforms may be modified, in order to increase the resolution of the determination of differences between the RF waveforms as sent and the RF waveforms as received, and/or to conserve power. 1. A system , comprising: 'implement a wireless network that is associated with an identifier having a pre-configured pattern; and', 'a master node configured to perform a wireless scan using the pre-configured pattern;', 'detect, based on the wireless scan, a presence of the wireless network implemented by the master node;', 'pair with the master node via the wireless network; and', 'output wireless sensing signals;, 'a plurality of satellite nodes configured to determine, based on wireless sensing signals output by a first satellite node, of the plurality of satellite nodes paired with the master node, an occurrence of an event; and', 'output an alert, based on the occurrence of the event, to at least a second satellite node of the plurality of satellite nodes paired with the master node., 'wherein the master node is further configured to2. The system of claim 1 , wherein the wireless network is a hidden wireless network that is undiscoverable without scanning for the identifier.3. The system of claim 2 , wherein the identifier is a Service Set Identifier (“SSID”).4. The system of claim 1 , wherein the pre-configured pattern includes a fixed portion and a variable portion claim 1 , wherein performing the wireless scan claim 1 , by a particular satellite node of the plurality of satellite nodes claim 1 , includes:performing a first ...

Encoding reference signal received powers

Apparatuses, methods, and systems are disclosed for encoding reference signal received powers. One apparatus includes a processor that: determines a reference signal received power corresponding to each beam of multiple beams to result in a set of determined reference signal received powers; orders the set of determined reference signal received powers in descending order to result in an ordered list of reference signal received powers; and encodes a difference between each two adjacent reference signal received powers of the ordered list of reference signal received powers to result in an encoded ordered list of reference signal received powers.

Method of Reporting Channel State Information, Communication Device and Computer Program

A communication device is arranged to operate in a cellular communication system and report Channel State Information, CSI, including a channel quality by a Channel Quality Indicator, CQI, which reports a CQI set. The communication device comprises a receiver arranged to receive antenna-specific reference signals, a channel estimator arranged to evaluate channel conditions from the reference signals to determine values of a CQI set, a reporting processor arranged to determine whether a bounded differential reporting format prevents values of the CQI set to be accurately reported, and to determine a CQI set such that the bounded differential reporting format allows the values of the CQI set to be reported to reduce under-reporting or over-reporting errors that arise from the use of the bounded differential reporting format, and to form a CSI report including the values of the CQI set using the bounded differential reporting format, and a transmitter arranged to send the CSI report. A method and computer program for implementing the method are also disclosed.

Information Processing Method and Device

Embodiments of the present invention disclose an information processing method and device, applicable to indicate a feedback mechanism for data transmission. The method in the embodiments of the present invention includes: sending, by a first device, first indication information to a second device, where the first indication information is used to indicate a first feedback mechanism of the second device for data transmission, the first feedback mechanism is at least one of a plurality of feedback mechanisms, and types of at least two of the plurality of feedback mechanisms are different; and receiving, by the first device, first feedback information sent by the second device based on first feedback mechanism. 1. A method , comprising:sending, by a first device, first indication information to a second device, wherein the first indication information indicates a first feedback mechanism of the second device for data transmission, the first feedback mechanism is at least one of a plurality of feedback mechanisms, and types of at least two of the plurality of feedback mechanisms are different; andreceiving, by the first device, first feedback information sent by the second device based on the first feedback mechanism.2. The method according to claim 1 , wherein a type of the first feedback information comprises an acknowledgement message or a channel quality indication message.3. The method according to claim 2 , wherein the plurality of feedback mechanisms comprises:feeding back the acknowledgement message and the channel quality indication message;feeding back the acknowledgement message, and skipping feeding back the channel quality indication message;skipping feeding back the acknowledgement message, and feeding back the channel quality indication message; orskipping feeding back the acknowledgement message and the channel quality indication message.4. The method according to claim 2 , wherein the first feedback mechanism comprises feeding back the acknowledgement ...

BASE STATION APPARATUS AND TRANSMISSION METHOD

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. 1. An integrated circuit , comprising: storing an extended codebook which is generated by combining a first basic codebook and a second basic codebook along a column direction, wherein the first basic codebook includes N groups, each consisting of four basic pre-coding column vectors (N is a natural number equal to or larger than 2), and wherein the second basic codebook is generated by applying phase offsets to the N groups, respectively, each of the phase offsets, applied to the N groups, being different from each other;', 'receiving, from a terminal apparatus via a multi-antenna array, information including a pre-coding matrix indicator (PMI) that identifies one pre-coding extended column vector from among 4N pre-coding extended column vectors included in the extended codebook;', 'pre-coding data using the pre-coding extended column vector identified by the PMI; and, 'control circuitry which, in operation, controlsat least one output, coupled to the control circuitry, which, in operation, outputs the pre-coded data for transmission via the multi-antenna array to the terminal apparatus.2. The integrated circuit according to claim 1 , wherein:each of the first basic codebook and the second basic codebook includes 4N basic pre-coding column ...

RADIO COMMUNICATION SYSTEM, RADIO BASE STATION APPARATUS, AND USER EQUIPMENT

A user equipment is disclosed that includes a receiver configured to receive candidates of phase rotation in a horizontal direction and candidates of phase rotation in a vertical direction for precoding. The user equipment also has a processor configured to report feedback information including a phase rotation in the horizontal direction and a phase rotation in the vertical direction to a radio base station based upon the candidates of the phase rotation in a horizontal direction and the candidates of phase rotation in a vertical direction. Additionally, the candidates of phase rotation in the horizontal direction or the candidates of phase rotation in the vertical direction are a part of predetermined candidates, the part being selected from the predetermined candidates according to a predetermined method. 1a receiver configured to receive candidates of phase rotation in a horizontal direction and candidates of phase rotation in a vertical direction for precoding; anda processor configured to report feedback information including a phase rotation in the horizontal direction and a phase rotation in the vertical direction to a radio base station based upon the candidates of the phase rotation in a horizontal direction and the candidates of phase rotation in a vertical direction,wherein the candidates of phase rotation in the horizontal direction or the candidates of phase rotation in the vertical direction are a part of predetermined candidates, the part being selected from the predetermined candidates according to a predetermined method.. A user equipment comprising: This application is a continuation of U.S. patent application Ser. No. 14/781,763, filed Oct. 1, 2015, which is a national phase application of PCT/JP2014/055294, filed Mar. 3, 2014, which claims priority to Japanese Application JP2013-079277, filed Apr. 5, 2013. The contents of the priority applications are incorporated herein by reference in their entirety.The present invention relates to a radio ...

User terminal

For proper beam failure detection or beam failure recovery even when a plurality of transmission points are used, an aspect of user equipment of the present disclosure includes: a receiving section configured to receive information regarding a number or proportion of at least one of a beam, a link, and a reference signal used to specify partial beam failure detection with respect to one or more transmission/reception points; and a control section configured to perform partial beam failure detection at one or a plurality of transmission/reception points based on the information.

REDUCING BEAMFORMING FEEDBACK SIZE IN WLAN COMMUNICATION

Mechanisms of reducing beamforming feedback reporting sizes in WIFI communication. At a beamformee STA, beamforming feedback matrices generated from channel estimation are subject to two compression processes: first compressed to angles through Givens rotation and then further compressed by using source coding. The double compressed feedback information is transmitted in a report to the beamformer. Accordingly, the beamformer reconstructs the feedback matrices by first decompressing the reported information by source decoding and then further decompressing based on the Givens rotation. In some other embodiments, the beamformee STA uses a beambook to map the beamforming feedback matrices to predetermined beamforming vectors. The associated indices of the vectors, which may be compressed, are transmitted in a beamforming feedback report. 1. A method of beamforming performed by a first wireless station (STA) in a wireless local area network (WLAN) , the method comprising:receiving a null data packet (NDP) at a first set of antennas comprised in said first wireless STA, wherein said NDP is transmitted from a second wireless STA through a wireless channel and comprises beamforming training signals;estimating a channel response of said wireless channel based on said beamforming training signals;generating a beamforming feedback matrix based on an estimated channel response, wherein said beamforming feedback matrix corresponds to a subcarrier or a subcarrier group in said wireless channel;performing angle compression on said beamforming feedback matrix to generate first compressed beamforming feedback; andperforming source coding to compress said first compressed beamforming feedback to generate second compressed beamforming feedback.2. The method of claim 1 , wherein said performing said source coding comprises performing arithmetic coding.3. The method of claim 1 , wherein said generating said beamforming feedback matrix comprises:generating a channel metric based on ...

Method of transmitting feedback message in wireless communication system

A method of transmitting a feedback message in wireless communication system is provided. The method includes selecting N best subbands of M subbands according to CQI, where both M and N are a natural number and M is larger than N, generating multiple input multiple output (MIMO) information comprising N codebook indexes and N differential CQIs and transmitting the feedback message comprising the MIMO information.

EFFICIENT CQI SIGNALING IN MULTI-BEAM MIMO SYSTEMS

The present invention relates to the signaling of channel quality information in a multi-beam transmission system, wherein a plurality of beams are simultaneously transmitted and a plurality of sets of channel quality information are transmitted for controlling independently the transmission rate on the different beams. Determined are beams with a different quality resulting in different effects of errors in the transmissions of the channel quality information for the beams. Said different effects are exploited for reducing a signaling overhead of the channel quality information for the beams. 1. A method for signaling channel quality information (CQI) in a multi-beam transmission system wherein a plurality of beams are simultaneously transmitted and one or more sets of channel quality information (CQI) are transmitted for independently controlling a transmission rate on at least two beams of the plurality of beams , the method comprising: determining a received signal-to-interference ratio (SIR) of the at least two beams of the plurality of beams;', 'determining a first beam of the at least two beams of the plurality of beams to be a primary beam as a consequence of the determined signal-to-interference ratio (SIR) being not less than a received signal-to-interference ratio (SIR) of any other beam of the at least two beams of the plurality of beams;', 'determining at least one other beam of the least two beams of the plurality of beams to be a secondary beam; and', 'reducing a signaling overhead of a channel quality information (CQI) for the at least two beams of the plurality beams by providing different reporting rates for a channel quality information (CQI) for the primary beam and the secondary beam,', 'wherein providing the different reporting rates for the channel quality information (CQI) comprises providing a second reporting rate for channel quality information (CQI) transmissions relating to the secondary beam compared to a first reporting rate for ...

CHANNEL PREDICTION FRAMEWORK FOR RADIO COMMUNICATION

A method for predicting channel state information is described. The method includes determining whether or not geodesic prediction is to be performed and transmitting the determination of whether or not geodesic prediction is to be performed in a first part of uplink control signaling. In response to determining that geodesic prediction is not to be performed, the method includes transmitting a current channel estimate in a second part of uplink control signaling, and in response to determining that geodesic prediction is to be performed, the method includes transmitting either a determined current value of a tangent vector, or a determined step size parameter, or both the determined current value of the tangent vector and the determined step size parameter in the second part of uplink control signaling. Channel state information is predicted based on information provided in the first and second parts of uplink control signaling. 136.-. (canceled)37. A method comprising:determining whether or not geodesic prediction is to be performed;transmitting the determination of whether or not geodesic prediction is to be performed in a first part of uplink control signaling;in response to determining that geodesic prediction is not to be performed, transmitting a current channel estimate in a second part of uplink control signaling; andin response to determining that geodesic prediction is to be performed, transmitting either a determined current value of a tangent vector, or a determined step size parameter, or both the determined current value of the tangent vector and the determined step size parameter in the second part of uplink control signaling;wherein channel state information is predicted based on information provided in the first part of uplink control signaling and the second part of uplink control signaling.38. The method as in claim 37 , wherein in response to determining that geodesic prediction is to be performed claim 37 , transmitting only the determined step ...

DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION IN WIRELESS COMMUNICATION SYSTEM

Disclosed is a 5generation (5G) or pre-5G communication system to be provided for supporting a data transmission rate higher than that of a 4generation (4G) communication system such as long term evolution (LTE). Examples of the present invention provide a beam selection and feedback device and method for minimizing complexity and overhead without performance deterioration in a beamforming MIMO wireless communication system. According to one example of the present invention, an apparatus of a receiving device in a wireless communication system comprises: a transceiver; and at least one processor, wherein the at least one processor is configured to: select at least one beam pair from among a plurality of transmission/reception beam pairs, and control the transceiver to transmit feedback information including indication information indicating whether the at least one beam pair is identical to a beam pair selected in a previous beamforming procedure. 1. A method for operating a receiving device in a wireless communication system , the method comprising:selecting at least one beam pair from among a plurality of transmission/reception beam pairs;transmitting feedback information including indication information indicating whether the at least one beam pair is identical to a beam pair selected in a previous beamforming procedure.2. The method of claim 1 , wherein the transmitting the feedback information comprises:when the beam pair selected in the previous beamforming procedure is identical to the at least one beam pair, transmitting the feedback information including indication information indicating that the beams are not changed.3. The method of claim 1 , wherein the transmitting the feedback information comprises:when the beam pair selected in the previous beamforming procedure is different from the at least one beam pair, transmitting the feedback information including indication information indicating that the beams are changed and information on the at least one ...

Quantized channel state information prediction in multiple antenna systems

A CSI vector quantizer (VQ) system is provided for time-correlated channels. The VQ system operates a receiver forwarding quantized channel state information in the form of indices and a transmitter predicting channel state change. The VQ system is aimed at feedback channels, in which bit errors, erasures and delays can occur. The VQ system uses transmitter-side channel prediction algorithms that work with the quantized CSI information and allow the system to recover from feedback channel transmission errors, erasures and delays. Moreover, the techniques can be used to lower the required feedback rate, while keeping the system's throughput at the required level.

CODEBOOK CONSTRUCTION

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (4TX) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed. 118-. (canceled)20. The method according claim 19 , further comprising:receiving, from the user equipment, information regarding channel quality including at least one of CQI and PMI; andselecting one the plurality of the precoding matrices by using the information regarding channel quality.22. The method according to claim 21 , wherein the {a claim 21 , a claim 21 , a claim 21 , a} takes at least {½ claim 21 , ½ claim 21 , ½ claim 21 , ½}.25. The method according to claim 19 ,wherein the 3-layer codebook includes a precoding matrix which contains a certain column of a 4×4 matrix obtained via Householder transformation as an element, andwherein the 4-layer codebook includes a 4×4 matrix obtained via Householder transformation as a precoding matrix.26. The method according to claim 19 , wherein each of the second 1-layer codebook and the second 2-layer codebook includes a precoding matrix which contains a certain column of a 4×4 matrix obtained via Householder transformation as an element.28. The method according claim 27 , further comprising:transmitting information regarding channel quality including at least one of CQI and PMI to the base station apparatus to select one the plurality of the precoding matrices.30. The method according to claim 29 , wherein the {a claim 29 , a claim 29 , a claim 29 , a} takes at least {½ ...

TECHNIQUES FOR CHANNEL STATE INFORMATION ACQUISITION IN NEW RADIO TECHNOLOGY

Certain aspects of the present disclosure provide techniques for channel state information acquisition in wireless communication systems operating according to new radio (NR) technologies. An exemplary method that may be performed by a user equipment (UE) generally includes receiving a first beamformed channel state information reference signal (CSI-RS), determining, based on the first beamformed CSI-RS and the beacon reference signal, information regarding an adjustment, preferred by the UE, of a beam-former to be used for a forthcoming second beamformed CSI-RS, transmitting a beamformer adjustment indicator (BAI), periodically, semi-persistently, or aperiodically, that indicates the preferred adjustment, and reporting channel state information feedback (CSF), based on the first beamformed CSI-RS. 1. A method for wireless communications performed by a user equipment (UE) , comprising:receiving a first beamformed channel state information reference signal (CSI-RS) and a beacon reference signal;determining, based on the first beamformed channel state information reference signal (CSI-RS) and the beacon reference signal, information regarding an adjustment, preferred by UE, of a beamformer to be used for a forthcoming second beamformed CSI-RS;transmitting a beamformer adjustment indicator (BAI), periodically, semi-persistently, or aperiodically, that indicates the preferred adjustment; andreporting channel state information feedback (CSF), based on the first beamformed CSI-RS.2. The method of claim 1 , wherein the information comprises an amount of benefit of adjusting the first beamformed CSI-RS toward the beacon reference signal.3. The method of claim 1 , further comprising:obtaining a configuration of the beacon reference signal, wherein the configuration comprises at least one of: antenna ports used for transmitting the beacon reference signal, a frequency used for transmitting the beacon reference signal, a time for transmitting the beacon reference signal, a ...

Techniques for handling channel state information (csi) in ultra low latency (ull) lte

Techniques for handling Channel State Information (CSI) for ultra low latency (ULL) in Long Term Evolution (LTE) devices are presented. For example, an example method of reporting CSI to a network entity is presented. Such an example method may include detecting a CSI reporting trigger for reporting CSI to the network entity and identifying, based on detection of the CSI reporting trigger, a subframe region for which the CSI is to be generated. In an aspect, the subframe region is included in a plurality of subframe regions, where each subframe region of the plurality of subframe regions includes at least one symbol of a subframe. In an additional aspect, the example method may include generating the CSI based on the subframe region and transmitting the CSI to the network entity.

COMMUNICATION APPARATUS AND COMMUNICATION METHOD

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal. 1. A communication apparatus comprising:circuitry which, in operation, stores a plurality of extended precoding matrices; anda transmitter which, in operation, transmits control information including a precoding matrix indicator (PMI) that identifies an extended precoding matrix selected from the plurality of extended precoding matrices;{'sub': m', 'm, 'wherein the extended precoding matrix is generated by combining a first precoding matrix (w) and a second precoding matrix, the first precoding matrix (w) including four elements having m times 2π/32 of a phase difference between each element, and the second precoding matrix being generated by multiplexing the first precoding matrix with a phase offset, wherein m is an integer.'}2. The communication apparatus according to claim 1 , wherein phases of each element of the first precoding matrix (w) are 0 claim 1 , 2π/32×m claim 1 , 4π/32×m and 6π/32×m.3. The communication apparatus according to claim 1 , wherein the first precoding matrix (w) is selected from 32 precoding matrices.4. The communication apparatus according to claim 1 , wherein the extended precoding matrix includes a matrix having a size of 1 by 8.5. The communication apparatus according to claim 1 , wherein the phase offset is ...

GUIDED ALIGNMENT OF WIRELESS DEVICE ORIENTATION

Embodiments provide for guided alignment of the orientation of two wireless devices. A first wireless device is at a known position and a known orientation. A signal from a second wireless device is received via a plurality of receive elements of the first wireless device. The first wireless device measures phase differences of the signal at the plurality of receive elements, and determines locations of each of the second wireless device's transmit elements based on the differences. Based on the transmit element locations, and a known antenna layout of the second wireless device, an orientation of the second wireless device is determined. Based on differences between the determined orientation and the known orientation of the first wireless device, instructions for aligning the devices are generated. Once the devices are aligned, location estimates of a third wireless device are made by both the first wireless device and the second wireless device. 1. A method of aligning orientations of two wireless devices , comprising:determining a first orientation and first position of a first wireless device;determining a second orientation and a second position of a second wireless device based on a first signal exchanged between the first and second wireless devices;generating instructions to reduce or eliminate a difference between the first orientation and the second orientation;causing performance of the instructions;in response to the causing, determining an updated orientation of the second wireless device based on a second signal exchanged between the first and second wireless devices;obtaining a first location estimate of a third wireless device, the first location estimate determined by the first wireless device at the first orientation;obtaining a second location estimate of the third wireless device, the second location estimate determined by the second wireless device at the updated orientation; andgenerating a third location estimate of the third wireless device ...

METHOD AND APPARATUS FOR ACQUIRING A PRECODING MATRIX INDICATOR AND A PRECODING MATRIX

In the field of communication technologies, a method and an apparatus for acquiring a Precoding Matrix Indicator (PMI) and a Precoding Matrix (PM) are provided. The method includes: acquiring a reference PMI and a differential PMI according to a first non-differential codebook and a first diagonal differential codebook, where codewords included in the first diagonal differential codebook form a diagonal matrix. The apparatus includes a PMI acquiring module. Acquiring a reference PMI and a differential PMI according to a non-differential codebook and a diagonal differential codebook can reduce the feedback overhead or improve the feedback precision; and the fact that a codeword included in the diagonal differential codebook is a diagonal matrix can maintain amplitude characteristics (for example, a constant modulus characteristic, and a finite character set constraint characteristic) of elements of the non-differential codebook or facilitate power distribution among antennas. 1. A method for acquiring a Precoding Matrix Indicator (PMI) , comprising:{'sub': 1', '2, 'obtaining a first PMI and a second PMI, wherein the combination of the first PMI and the second PMI indicates a precoding matrix {circumflex over (V)}or {circumflex over (V)}, the precoding matrix is used for generating data to be sent by a data sending end; and'}sending the first PMI and the second PMI to the data sending end;{'sub': 1', '2', '2', 'k2', 'k1', '1', '1', '2', 'k1', 'k2', 'k1', 'k2, 'sup': '−1', 'wherein the precoding matrixes {circumflex over (V)}and {circumflex over (V)}satisfy {circumflex over (V)}=C(C){circumflex over (V)}, {circumflex over (V)}is a precoding matrix corresponding to a combination of a first PMI n and a second PMI k1, {circumflex over (V)}is a precoding matrix corresponding to a combination of the first PMI n and a second PMI k2, Cis a codeword corresponding to the second PMI k1, Cis a codeword corresponding to the second PMI k2, and each of the codeword Cand Cis a ...

METHOD FOR WIFI BEAMFORMING,FEEDBACK, AND SOUNDING (WIBEAM)

Methods for WiFi beamforming, feedback, and sounding (WiBEAM) are described. Codebook based beamforming feedback signaling and sounding mechanisms for use in wireless communications are disclosed. The methods described herein improve the feedback efficiency by using Givens rotation based decompositions and quantizing the resulting angles of the Givens rotation based decompositions using a range from a subset of [0, 2π]. Feedback may also be divided into multiple components to improve feedback efficiency/accuracy. Time domain beamforming reports for taking advantage of channel reciprocity while still taking into account practical radio frequency (RF) channel impairments are also described. Beamforming feedback that prioritized the feedback bits in accordance with the significance of the bits is also disclosed. A preamble structure to enable the use of smoothing methods for improved channel estimation, codebook designs that may be used for codebook based beamforming feedback, and multi-resolution explicit feedback are disclosed as well. 1. A method for use in a wireless transmit/receive unit (WTRU) for providing beamforming feedback , the method comprising:receiving a sounding frame from an access point (AP);performing a first measurement on the sounding frame;performing a singular value decomposition (SVD) on the performed first measurement;performing a Givens rotation based decomposition on the performed first measurement and quantizing each resulting angle by assigning a range to each resulting angle, wherein each range is a subset of [0, 2π]; andtransmitting the quantized angles to the AP in a feedback frame.2. The method of wherein each resulting angle is assigned a single value from the subset of [0 claim 1 , 2π].3. The method of wherein each resulting angle is assigned a unique range from the subset of [0 claim 1 , 2π].4. The method of wherein the feedback frame is a codebook component feedback frame.5. The method of wherein the feedback frame includes results ...

Measurement report payload reduction techniques

Aspects relate to configuration of a Layer 1 (L1) measurement report. A radio access network (RAN) node (e.g., a base station) can transmit at least one report setting, each associated with a selected information type, to a wireless communication device (e.g., a UE). The selected information type may be selected from a first information type and a second information type. When a report setting is associated with the first information type, the wireless communication device can transmit the L1 measurement report including both beam measurements and beam identifiers corresponding to the beam measurements for the report setting. When the report setting is associated with the second information type, the wireless communication device can exclude the beam identifiers from the L1 measurement report including the beam measurements for the report setting. Other aspects, features, and examples are also claimed and described.

User equipment performing beam reporting

A user equipment (UE) includes a receiver that receives, from a base station (B S), multiple reference signals transmitted using first beams, a processor, and a transmitter. The first beams comprise at least one second beam used for Physical Downlink Control Channel (PDCCH) transmission between the BS and the UE and third beams that are not used for the PDCCH transmission. The processor measures quality of the first beams. The transmitter reports, to the BS, the quality of the at least one second beam and part of the third beams.

CODEBOOK CONSTRUCTION

A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having 1-layer, 2-layer, 3-layer, and 4-layer codebooks for 4 transmit antenna (TX) transmission, each codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each of the 1-layer and 2-layer codebooks comprises a first codebook and a second codebook, and wherein each precoding matrix in the first codebook comprises a first index and a second index. Other apparatuses, systems, and methods also are disclosed. 118-. (canceled)19. A base station comprising:a reception interface configured to receive, from a user equipment (UE), a first parameter related to precoding matrix indicator (PMI), and a second parameter related to rank indicator (RI);a transmission interface configured to transmit, to the UE, a data which the data is precoded by using one of plurality of precoding matrices, based on the first parameter and the second parameter;wherein the transmission interface comprises 4 transmit antenna (4TX);wherein the plurality of precoding matrices comprise a first 1-layer, a second 1-layer, a first 2-layer, a second 2-layer, 3-layer, and 4-layer codebooks for 4TX transmission, which each precoding matrix in the first 1-layer and the first 2-layer codebooks comprises a first index and a second index.20. The base station according to claim 19 , whereineach of 1-layer codebooks includes a plurality of 4×1 precoding matrices; andeach of 2-layer codebooks includes a plurality of 4×2 precoding matrices.21. The base station according to claim 19 , whereinthe first index is for a plurality of subbands and the second index is for each subband.22. The base station according to claim 19 , whereineach of the second 1-layer and the second 2-layer codebooks comprises a legacy codebook or a householder codebook.23. The base station according to ...

AREA CALIBRATION AND BEAMFORMING REFINEMENT

A wireless device of the present disclosure may be able to reduce the time needed to determine a subarray and/or beamforming direction used for mmW communication. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one aspect, the apparatus may maintain first information associated with a correlation between each of a plurality of wireless device positions and wireless device orientations and a plurality of nodes, at least one subarray, and a corresponding beamforming direction. In another aspect, the apparatus may transmit the first information associated with the correlation to a plurality of nodes. 1. A method of wireless communication for a wireless device , comprising: each of a plurality of wireless device positions and wireless device orientations and', 'a plurality of nodes, at least one subarray, and a corresponding beamforming direction; and, 'maintaining first information associated with a correlation between'}transmitting the first information associated with the correlation to the plurality of nodes.2. The method of claim 1 , further comprising:determining a first position and a first orientation of the wireless device based on second information from one or more sensors; anddetermining a first node, a first subarray, and a first beamforming direction associated with the first position and the first orientation of the wireless device based on the first information and the second information.3. The method of claim 2 , further comprising:communicating with the first node using the first subarray and the first beamforming direction.4. The method of claim 2 , further comprising:updating the first information based on the determined first node, the determined first subarray, and the determined first beamforming direction associated with the first position and the first orientation of the wireless device.5. The method of claim 4 , wherein the updating the first information comprises refining the first ...

Information transmission method and device

Disclosed are an information transmission method and device for improving CSI feedback performance and providing finer CSI feedback. The information transmission method of the present invention comprises: determining a quantity of layers transmitted on a channel; and determining, according to the quantity of the layers transmitted on the channel, channel state information (CSI) fed back for the respective layers, and transmitting the same, and the CSI fed back for the respective layers comprises information about multi-level beams.

CHANNEL QUALITY INDICATOR DESIGN FOR ENHANCED MACHINE-TYPE-COMMUNICATIONS

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a first control channel in a first frequency band. The UE may determine that a bandwidth capability of the UE supports communicating on the first frequency band and at least a second frequency band. The UE may perform a channel measurement procedure on the first frequency band and the second frequency band concurrently. The UE may transmit a channel feedback message including information associated with the channel measurement procedure. 1. A method for wireless communication , comprising:monitoring, by a wireless device, a first control channel in a first frequency band;determining that a bandwidth capability of the wireless device supports communicating on the first frequency band and at least a second frequency band;performing a channel measurement procedure on the first frequency band and the second frequency band concurrently; andtransmitting a channel feedback message comprising information associated with the channel measurement procedure.2. The method of claim 1 , wherein:the second frequency band is larger than the first frequency band and includes the first frequency band.3. The method of claim 1 , further comprising:autonomously determining, by the wireless device, to perform the channel measurement procedure on the first frequency band and the second frequency band.4. The method of claim 1 , further comprising:receiving a configuration message conveying a channel measurement request; andperforming the channel measurement procedure on the first frequency band and the second frequency band based at least in part on the configuration message.5. The method of claim 1 , further comprising:identifying a portion of subframes from a plurality of subframes to perform the channel measurement procedure; andperforming the channel measurement procedure on the first frequency band and the second frequency band during the identified portion of subframes.6. The ...

ENCODING REFERENCE SIGNAL RECEIVED POWERS

Apparatuses, methods, and systems are disclosed for encoding reference signal received powers. One apparatus () includes a processor () that: determines () a reference signal received power corresponding to each beam of multiple beams to result in a set of determined reference signal received powers; orders () the set of determined reference signal received powers in descending order to result in an ordered list of reference signal received powers; and encodes () a difference between each two adjacent reference signal received powers of the ordered list of reference signal received powers to result in an encoded ordered list of reference signal received powers. 1. A method comprising:determining a reference signal received power corresponding to each beam of a plurality of beams to result in a set of determined reference signal received powers;ordering the set of determined reference signal received powers in descending order to result in an ordered list of reference signal received powers; andencoding a difference between each two adjacent reference signal received powers of the ordered list of reference signal received powers to result in an encoded ordered list of reference signal received powers.2. The method of claim 1 , wherein encoding the difference between each two adjacent reference signal received powers of the ordered list of reference signal received powers comprises using variable length encoding to encode the difference between each two adjacent reference signal received powers of the ordered list of reference signal received powers.3. The method of claim 2 , wherein using the variable length encoding comprises concatenating one or more fixed length units together to form a variable length structure claim 2 , each unit of the one or more fixed length units comprises one or more value bits and a last bit claim 2 , the one or more value bits indicate at least a portion of an encoded value claim 2 , and the last bit indicates whether an additional unit ...

无线通信系统中带层置换的mimo传输

描述了用于支持带层置换的MIMO传输的技术。在一个方面，可生成用于从多个天线(例如，虚拟天线)发射的多个码字，并且码字的数目少于天线的数目。每个码字可跨多个天线映射。可生成两个码字。对于秩3，第一码字可被映射至一个层(或者在每个副载波上映射至一个天线)，而第二码字可被映射至两个层(或者在每个副载波上映射至两个天线)。对于秩4，每个码字可被映射至两个层。在另一方面，可确定指示平均信号质量的基CQI。也可确定指示相对于平均信号质量的提升的ΔCQI。在又一方面，可使用针对不同秩或码字数目的不同惩罚因子执行选择。

Feedback of differentially encoded channel state information for multiple-input multiple-output (MIMO) and subband scheduling in a wireless communication system

Techniques for efficiently sending channel state information using differential encoding are described. Differential encoding may be performed across space, across frequency; across space and frequency, across space, frequency and time, or across some other combination of dimensions. In one design, spatial state information may be determined for multiple spatial channels on multiple subbands. The spatial channels may correspond to different antennas, different precoding vectors, etc. Channel quality indicator (CQI) values may be obtained for the multiple spatial channels on the multiple subbands. The CQI values may be differentially encoded across the multiple spatial channels and the multiple subbands to obtain differential CQI information. In another design, CQI values may be obtained for multiple spatial channels on the multiple subbands in multiple time intervals and may be differentially encoded across space, frequency and time. The differential CQI information and the spatial state information may be sent as feedback.

Method and apparatus for tranceiving feedback information in wireless packet data communication system

본 발명은 단일 사용자 MIMO와 다중 사용자 MIMO의 동작을 모두 지원하면서 CQI 피드백 오버헤드(feedback overhead)가 증가하는 양은 크지 않도록 CQI 표현 및 피드백 방법을 제안한 것이다. 기본 MIMO 동작을 단일 사용자 MIMO나 다중 사용자 MIMO로 설정하면 기지국은 해당 MIMO 동작에 최적화되어 있는 MIMO CQI 피드백을 수신 받았을 수 있다. 그러나 스케줄러가 기본 MIMO 동작이 아닌 대안 MIMO 동작을 선택했다면 기지국은 기본 MIMO 동작을 위한 절대 CQI 피드백과 대안 MIMO 동작을 위한 상대 CQI 피드백을 토대로 대안 MIMO 동작에 필요한 CQI를 계산한다. 즉 본 발명은 기본 MIMO 동작에서는 정확한 CQI를 제공하여 최선의 동작이 가능하게 하고 대안 MIMO 동작에서는 차선의 동작이 가능하게 한다. 본 발명을 사용할 경우, 기지국은 단일 사용자 MIMO와 다중 사용자 MIMO의 동작을 동적으로 선택할 수 있기 때문에 자원 관리 효율을 높일 수 있다. The present invention proposes a CQI expression and feedback method so that the amount of increase in CQI feedback overhead is not large while supporting both single user MIMO and multiuser MIMO operations. If the basic MIMO operation is set to single user MIMO or multi-user MIMO, the base station may have received MIMO CQI feedback optimized for the corresponding MIMO operation. However, if the scheduler selects an alternative MIMO operation other than the default MIMO operation, the base station calculates the CQI required for the alternative MIMO operation based on the absolute CQI feedback for the basic MIMO operation and the relative CQI feedback for the alternative MIMO operation. That is, the present invention enables the best operation by providing accurate CQI in the basic MIMO operation, and enables suboptimal operation in the alternative MIMO operation. In the case of using the present invention, the base station can dynamically select the operation of the single-user MIMO and multi-user MIMO can increase the resource management efficiency. 패킷 데이터, MIMO, CQI Packet data, MIMO, CQI

Method for transmitting control information in multi antenna system

다중안테나 시스템에서의 제어정보 전송방법을 개시한다. 다수의 계층을 가지는 다중안테나 시스템에서의 제어정보 전송방법은 제1 계층의 채널품질정보를 구하는 단계, 상기 제1 계층 이외의 나머지 계층의 채널품질정보와 상기 제1 계층의 채널품질정보와의 차이값을 구하는 단계, 상기 제1 계층의 채널품질정보를 전송하는 단계 및 상기 차이값을 전송하는 단계를 포함한다. 제한된 제어채널을 통하여 다중안테나 시스템에서의 비트맵 정보, 계층별 CQI, PMI 등의 제어정보를 효율적으로 전송할 수 있다. Disclosed is a control information transmission method in a multi-antenna system. In a multi-antenna system having a plurality of hierarchies, the method of transmitting control information may include obtaining channel quality information of a first layer, and a difference between channel quality information of a layer other than the first layer and channel quality information of the first layer. Obtaining a value, transmitting channel quality information of the first layer, and transmitting the difference value. Through limited control channels, it is possible to efficiently transmit control information such as bitmap information, layer-specific CQI, and PMI in a multi-antenna system.

用于mu-mimo的低开销pmi和cqi反馈和配对方案

本发明提供了搜索配对PMI，包括：估计从接入点发射机到UE处接收机的MIMO无线传播信道；利用由多个码字构成的码本对所估计的信道进行量化，结果是当前可应用于UE的SU-MIMO PMI；估计与实际SU-MIMO PMI相对应的信道质量，结果得到针对UE的至少一个CQI；根据码字的码本构建多个子集，每个子集包括潜在MU-MIMO PMI，潜在MIMO PMI表示对潜在SU-MIMO PMI之一所表示的信道的干扰减小的信道；将每一个潜在SU-MIMO PMI与包括潜在MU-MIMO PMI在内的指示符相关联，潜在MU-MIMO PMI表示对该潜在SU-MIMO PMI所表示的信道的干扰减小的信道；以及搜索针对UE的适当的配对PMI及关联CQI。

무선 통신 시스템에서 피드백 메시지 전송 방법

피드백 메시지 전송 방법은 상향링크 무선자원 할당을 포함하는 피드백 요청 메시지를 수신하는 단계 및 복수의 서브밴드 중 선택된 N개의 서브밴드에 대한 평균 CQI(channel quality information)인 Best-N 평균 CQI와 상기 N개의 서브밴드에 대한 평균 코드북의 인덱스인 Best-N 평균 코드북 인덱스를 포함하는 MIMO 정보를 포함하는 피드백 메시지를 상기 상향링크 무선자원을 통해 전송하는 단계를 포함한다. 무선 통신 시스템에서 피드백 메시지에 다른 종류의 채널 정보를 조합하여 한번에 전송함으로써 오버헤드를 줄일 수 있다. 필요에 따라 다양한 채널 정보가 조합된 피드백 메시지를 전송할 수 있어 전송의 효율을 높일 수 있다. 피드백, CQI, MIMO, OFDMA, AMC

Techniques utilizing adaptive codebooks for beamforming in wireless networks

본 발명의 실시예는 무선 네트워크에서의 통신을 위한 빔포밍을 위해 적응 코드북을 이용하는 단계를 포함하는 방법을 제공한다. Embodiments of the present invention provide a method comprising using an adaptive codebook for beamforming for communication in a wireless network.

Information transmission method and device

본 출원의 실시예는 CSI 피드백 성능을 향상시키고 보다 정밀한 CSI 피드백을 제공하기 위한, 정보 전송 방법 및 장치를 제공하되, 본 출원에 의해 제공되는 정보 전송 방법은 채널 전송의 데이터 스트림의 수를 확정하는 단계; 및 상기 채널 전송의 데이터 스트림의 수에 따라, 각각의 상기 데이터 스트림에 대해 피드백될 채널 상태 정보(CSI)를 확정하여 송신하는 단계 - 각각의 상기 데이터 스트림에 대해 피드백될 CSI는 다중 레벨 빔의 정보를 포함함 - 를 포함한다. An embodiment of the present application provides an information transmission method and apparatus for improving CSI feedback performance and providing more precise CSI feedback, wherein the information transmission method provided by the present application determines the number of data streams of channel transmission step; and determining and transmitting channel state information (CSI) to be fed back for each data stream according to the number of data streams of the channel transmission. CSI to be fed back for each data stream is multi-level beam information. includes - includes.

A kind of information transferring method and device

本申请公开了一种信息传输方法及装置，用以提高CSI反馈性能，提供更加精细的CSI反馈。本申请提供的一种信息传输方法，包括：确定信道传输的数据流的数量；根据所述信道传输的数据流的数量，确定并发送针对每一所述数据流反馈的信道状态信息CSI；其中，针对每一所述数据流反馈的CSI包括多级波束的信息。

Codebook construction

무선 통신 시스템에서 사용되는 기지국에서 구현되는 방법이 개시된다. 상기 방법은 4TX(4 transmit) 안테나 송신을 위한 1-계층, 2-계층, 3-계층, 및 4-계층 코드북을 구비하는 단계로서, 각각의 코드북은 복수의 프리코딩 행렬들을 포함하는 상기 구비하는 단계와, 상기 복수의 프리코딩 행렬들의 하나로 데이터를 프리코딩하는 단계와, 사용자 장비에게 상기 프리코딩된 데이터를 송신하는 단계를 포함하며, 상기 1-계층 및 2-계층 코드북들은 제 1 코드북 및 제 2 코드북을 포함하고, 상기 제 1 코드북 내의 각 프리코딩 행렬은 제 1 인덱스 및 제 2 인덱스를 포함한다. 다른 장치, 시스템, 및 방법이 또한 개시된다. A method implemented in a base station used in a wireless communication system is disclosed. The method comprises providing a 1-layer, 2-layer, 3-layer, and 4-layer codebook for 4 transmit (4 transmit) antenna transmission, wherein each codebook comprises a plurality of precoding matrices. And precoding data into one of the plurality of precoding matrices, and transmitting the precoded data to user equipment, wherein the 1-layer and 2-layer codebooks are the first codebook and the first codebook. 2 codebooks, and each precoding matrix in the first codebook includes a first index and a second index. Other apparatus, systems, and methods are also disclosed.

Apparatus and method for transmitting and receiving feedback information in a wireless communication system

본 개시는 LTE와 같은 4G 통신 시스템 이후 보다 높은 데이터 전송률을 지원하기 제공될 5G 또는 pre-5G 통신 시스템에 관련된 것이다. 본 발명의 실시예들은 빔포밍 MIMO 무선 통신시스템에서 성능 열화없이 복잡도와 오버헤드를 최소화하는 빔 선택 및 피드백 장치와 방법을 제공한다. 본 발명의 일 실시예에 따르면, 무선 통신 시스템의 단말 장치는, 다수의 송수신빔 조합들 중에서 적어도 하나의 빔 조합을 선택하는 제어부와, 상기 적어도 하나의 빔 조합이 이전의 최적 빔 조합과 동일한지 여부를 지시하는 지시 정보를 포함하는 피드백 정보를 송신하는 송신기를 포함한다. The present disclosure relates to a 5G or pre-5G communication system to be provided to support a higher data rate after a 4G communication system such as LTE. Embodiments of the present invention provide a beam selection and feedback apparatus and method for minimizing complexity and overhead without performance degradation in a beamforming MIMO wireless communication system. According to an embodiment of the present invention, a terminal device of a wireless communication system includes a control unit that selects at least one beam combination from among a plurality of transmission/reception beam combinations, and determines whether the at least one beam combination is the same as a previous optimal beam combination. and a transmitter for transmitting feedback information including indication information indicating whether or not to do so.

Obtain pre-coding matrix instruction and the method and apparatus of pre-coding matrix

本发明公开了一种获取预编码矩阵指示以及预编码矩阵的方法和装置，属于通信技术领域。所述方法包括：根据第一非差分码本和第一对角化差分码本，获取参考预编码矩阵指示和差分预编码矩阵指示，其中，所述第一对角化差分码本中包括的码字为对角化矩阵。所述装置包括：预编码矩阵指示获取模块。本发明根据非差分码本和对角化差分码本，获取参考PMI和差分PMI，可以节省反馈开销，或者提高反馈精度，对角化差分码本中包括的码字为对角化矩阵，可以保持非差分码本具有的元素的幅度特性(如恒模特性，有限字符集约束特性)或者便于实现天线间的功率分配。

Channel state information feedback for MIMO and subband scheduling in wireless communication systems

差分符号化を使用して、効率的にチャネル状態情報を送信するための技法が記述される。差分符号化は、空間を横切って、周波数を横切って、空間と周波数を横切って、空間、周波数および時間、または次元の他のいくつかの組合せを横切って行なわれるかもしれない。１つの設計において、空間的状態情報は、複数のサブバンド上の複数の空間的チャネルについて決定されるかもしれない。空間的チャネルは、異なるアンテナ、異なるプリコーディング・ベクトル、などに対応するかもしれない。チャネル品質インディケーター（ＣＱＩ）値は、複数のサブバンド上の複数の空間的チャネルについて得られるかもしれない。前記ＣＱＩ値は、差分ＣＱＩ情報を得るために複数の空間的チャネルおよび複数のサブバンドを横切って差分的に符号化されるかもしれない。別の設計において、ＣＱＩ値は、複数の時間区間における複数のサブバンド上の複数の空間的チャネルについて得られるかもしれないし、空間、周波数および時間を横切って差分的に符号化されるかもしれない。前記差分ＣＱＩ情報および空間的状態情報はフィードバックとして送信されるかもしれない。

Apparatus, and associated method, for facilitating antenna weight selection utilizing deterministic perturbation gradient approximation

폐루프 전송 다이버시티를 이용하는 통신 시스템에서 송신된 신호들을 가중하기 위한 최적 안테나 가중치들의 선택을 용이하게 하는 장치 및 관련 방법이 제공된다. 결정적 섭동 기울기 근사 기술이 이용되는데, 섭동 벡터들은 선택기에 의해 선택되고(136), 애플리케이터에 의해 안테나 가중 요소들에 인가된다. 선택된 세트의 섭동 벡터들은 포지티브 방향 및 네거티브 방향 양자에서 상기 안테나 가중 요소들에 인가된다. 수신국에 있는 검출기는 일단 상기 섭동 벡터들을 가지고 가중된, 수신국에 전달된 신호들과 분리하여 측정한다. 단일-비트 피드백 값이 송신국으로 반환되고, 상기 안테나 가중치들은 적합하게 조정된다(142). 상기 기술은 비-통화 채널 전환 상태 및 통화 채널 전환 상태 양자동안 이용된다. An apparatus and associated method are provided that facilitate selection of optimal antenna weights for weighting transmitted signals in a communication system utilizing closed loop transmit diversity. A deterministic perturbation gradient approximation technique is used, where the perturbation vectors are selected by the selector (136) and applied by the applicator to the antenna weighting elements. The selected set of perturbation vectors is applied to the antenna weighting elements in both the positive and negative directions. The detector at the receiving station measures separately from the signals transmitted to the receiving station once weighted with the perturbation vectors. A single-bit feedback value is returned to the transmitting station and the antenna weights are adjusted appropriately (142). The technique is used during both non-call channel transition states and call channel transition states. 안테나, 가중, 섭동, 통신 Antenna, weighted, perturbation, communication

A MIMO beamforming technique for frequency selective channels in wireless communication systems

本発明の実施形態は、無線ネットワークで基地局（ＢＳ）として動作し、ＭＩＭＯビーム形成を行い、さらには、サブバンドについて複数のビーム形成マトリクスをトランシーバへフィードバックするレシーバと無線通信し、サブバンドにわたってビーム形成マトリクスを補間するトランシーバを備えた装置を提供する。 【選択図】図１

Apparatus, method and system for MIMO beamforming of frequency selective channels in a wireless communication system

本申请提供了用于无线通信系统中的频率选择信道的MIMO波束成形的装置、方法和系统。本发明的实施例提供了一种装置，包括：收发机，操作为无线网络中的基站(BS)，所述收发机适用于多输入多输出(MIMO)波束成形，并进一步适用于与接收机进行无线通信，接收机向所述收发机反馈用于每个子频带的多个波束成形矩阵并跨所述子频带对所述波束成形矩阵进行内插。

Codebook structure

MIMO feedback schemes for cross-polarized antennas

一种方法包括：通过多个通信信道从天线阵列(40)接收多输入多输出(MIMO)信号，该天线阵列(40)包括具有第一极化的第一天线集合(44A...44D)以及具有与第一极化正交的第二极化的第二天线集合(48A...48D)。计算与第一集合或第二集合内的天线之间的第一相互关系相关的第一反馈信息。计算至少与第一天线集合或第二天线集合之间的第二相互关系相关的第二反馈信息。以第一时间/频率粒度发射第一反馈信息，并且以比第一时间/频率粒度更精细的第二时间/频率粒度来发射第二反馈信息。

method and transmitter for modifying beamforming vector iteratively

이기적 빔 포밍과 이타적 빔 포밍을 선형 결합한 빔 포밍 벡터를 피드백 정보를 이용하여 반복적으로 갱신함으로써 통신 상황에 최적화된 데이터 전송 용량을 제공한다. 빔 포밍 벡터의 반복적 갱신을 위한 송신기는 수신기로부터 피드백 정보를 수신하는 피드백 수신모듈과, 초기 빔 포밍 시 이기적 빔 포밍을 위한 제1 벡터와 이타적 빔 포밍을 위한 제2 벡터를 결합하여 초기 빔 포밍 벡터를 결정하고, 빔 포밍이 갱신될 때마다 피드백 정보를 참조하여 상기 빔 포밍 벡터의 제1 벡터 및 제2 벡터의 결합 비율을 수정하는 벡터 결정 모듈을 포함한다. iterative, BF, beamforming, ZF, MRT By repeatedly updating a beamforming vector linearly combining selfish beamforming and altruistic beamforming with feedback information, an optimized data transmission capacity is provided for a communication situation. The transmitter for iteratively updating the beamforming vector includes an initial beamforming by combining a feedback receiving module that receives feedback information from a receiver, a first vector for selfish beamforming and a second vector for altruistic beamforming during initial beamforming. And a vector determination module for determining a vector and modifying a combining ratio of the first vector and the second vector of the beamforming vector with reference to feedback information every time the beamforming is updated. iterative, BF, beamforming, ZF, MRT

Method and apparatus for transmitting data in mimo communication system

PURPOSE: A data transmission apparatus in a MIMO communication system and a method thereof are provided to efficiently release interference among multiple users. CONSTITUTION: A processor(510) selects a first PMI about a channel between a terminal(500) and a base station(400) and a second PMI which is different from the first PMI value by the channel estimation result. An RF(Radio Frequency) part(530) transmits the first PMI which is transmitted from the processor and an uplink data which will be transmitted to the second PMI to the base station. An RF part receives a downlink data which is transmitted to a terminal from the base station.

Method and system for feeding back channel quality indications

本发明公开了一种信道质量指示的反馈方法，该方法包括：在多点协作传输(CoMP)系统中，终端对多点协作传输激活传输节点组(CATS)中，所有传输节点与所述终端之间形成的综合信道对应的信道质量指示(CQI)、或各个传输节点自身与终端之间信道对应的各个CQI进行反馈。本发明还公开了一种信道质量指示的反馈系统，该系统包括：反馈单元，用于在CoMP系统中，终端对CATS中所有传输节点与所述终端之间形成的综合信道对应的CQI、或各个传输节点自身与终端之间信道对应的各个CQI进行反馈。采用本发明的方法及系统，不仅能实现CoMP系统中CQI的反馈，而且能避免CQI在控制信道和业务信道反馈时存在的差异性。

Method and system for a delta quantizer for MIMO pre-coders with finite rate channel state information feedback

Aspects of a method and system for a delta quantizer for MIMO pre-coders with finite rate channel state information feedback may include quantizing a change in channel state information in a MIMO pre-coding system onto a codebook, which comprises one or more unitary matrices, using a cost function. The codebook may be generated based on at least the channel state information. The channel state information may comprise a matrix V and the cost function f(A) may be defined by the following relationship: f ⁡ ( A ) = ( 1 N ⁢ ∑ j = 1 N ⁢  a jj  2 ) where A is a matrix of size N by N and aij is element (i,j) of matrix A. One or more unitary matrices may be generated from at least a first set of matrices and a second set of matrices, where the first set of matrices may comprise one or more Givens matrices. A dynamic range and a resolution of the codebook may be modified.

Technologies for codebook-based feedback and transmissions

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

Method and first radio node for communicating data using hierarchical codebooks and multi-stage precoder selection

A method and a first radio node (200 or 202), for communicating data with a second radio node in a wireless network using precoders. The first radio node (200 or 202) communicates (2:1) with the second radio node (202 or 200) a first data transmission using a first set of precoders (SI), and communicates (2:4) with the second radio node (202 or 200) a precoder indicator which is based on quality of the communicated first data transmission. The first radio node (200 or 202) identifies (2:5) a second set of precoders (S2) within the first set (SI) based on the communicated precoder indicator, and communicates (2:6) with the second radio node (202 or 200) a second data transmission using the second set of precoders. Said method and device can be used with multi-stage/hierarchical codebooks (i.e. tree structure codebooks).

Method for transmitting data to terminal by base station, base station device, and central control server

The present invention provides a method for transmitting data to a terminal by a base station, a base station device, and a central control server, which can select an appropriate coordinated multi-point (CoMP) scheme from multiple CoMP schemes to perform downlink data transmission. In the present invention, the base station can use multiple CoMP schemes, and is connected to multiple subordinate transmission points for performing data transmission. The base station is characterized by comprising a transceiver unit, disposed on a transmission point and used for performing data transmission and receiving with a terminal; a data processing unit, used for extracting, in data received by the transceiver unit from the terminal, non-periodic feedback information and periodic feedback information; a CoMP scheme selection unit, used for selecting, from multiple CoMP schemes, a CoMP scheme suitable for the terminal according to the non-periodic feedback information; and a scheduling unit, used for performing scheduling by using the selected CoMP scheme according to the non-periodic feedback information and the periodic feedback information, and performing data transmission with the terminal through the corresponding transceiver unit.

Selecting either open or closed-loop MIMO according to which has the greatest estimated channel capacity

Method and apparatus for supporting single-user multiple-input multiple-output (su-mimo) and multi-user mimo (mu-mimo)

SU-MIMO(single-user multiple-input multiple-output) 및 MU-MIMO(multi-user MIMO)를 이용한 데이터 통신을 지원하기 위한 기법들이 기술된다. 기지국은 주어진 시간-주파수 자원을 통해서 다수의 데이터 스트림들을 SU-MIMO에 대한 단일의 사용자 장비(UE) 또는 MU-MIMO에 대한 다수의 UE들에 전송할 수 있다. 일 양상에서, MU-MIMO에 대해 UE에 대한 안테나 포트 할당은 DCI(downlink control information) 포맷의 하나 이상의 필들들 재사용함으로써 전달될 수 있다. 다른 양상에서, 계층적 2-계층 구조가 MU-MIMO에 대해 UE에 대한 안테나 포트 할당을 전달하는데 이용될 수 있다. 또 다른 양사에서, UE는 SU-MIMO 및 MU-MIMO를 지원하는 전송 모드에서 동작중일 때 CQI(channel quality indicator)만을, 또는 CQI 및 PMI(precoding matrix indicator) 둘 다를 리포트하도록 더 높은 계층을 통해 구성될 수 있다. 또 다른 양상에서, UE는 SU-MIMO 및 MU-MIMO가 UE에 대해 지원될 수 있도록 CQI를 리포트할 수 있다. Techniques for supporting data communication using single-user multiple-input multiple-output (SU-MIMO) and multi-user MIMO (MU-MIMO) are described. A base station may transmit multiple data streams over a given time-frequency resource to a single user equipment (UE) for SU-MIMO or multiple UEs for MU-MIMO. In an aspect, an antenna port assignment for a UE for MU-MIMO may be delivered by reusing one or more fills in a downlink control information (DCI) format. In another aspect, a hierarchical two-layer structure may be used to convey the antenna port assignment for the UE for MU-MIMO. In yet another case, the UE is configured via a higher layer to report only the channel quality indicator (CQI) or both the CQI and the precoding matrix indicator (PMI) when operating in a transmission mode supporting SU-MIMO and MU-MIMO. . In yet another aspect, the UE may report the CQI such that SU-MIMO and MU-MIMO may be supported for the UE.

User terminal and radio communication method

In order to suppress degradation of communication quality even if a user terminal applies beam forming in reception, a user terminal according to an aspect of the present invention comprises: a reception unit that receives DL signals; and a control unit that controls reporting of a measurement report corresponding to a predetermined reception beam on the basis of the received DL signals, wherein the control unit determines the predetermined reception beam in an autonomous manner or on the basis of information transmitted from a radio base station.

Wireless communication system, base station, terminal and method of generating codebook

The present disclosure provides a method of generating codebook in a wireless communication system with multiple antenna arrays, as well as a wireless communication system, base station and terminal using the codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good precision of feedback for multi-antenna array is kept by applying the method of generating codebook and using the generated codebook in the wireless communication system, base station and terminal.

Mimo transmission with layer permutation in a wireless communication system

Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

Generate the wireless communication system of code book, base station, terminal and method

本公开提供了一种在具有多个天线阵列的无线通信系统中生成码本的方法、以及使用所述码本进行通信的无线通信系统、基站和终端。所述方法包括以下步骤：提供包含多个预编码矩阵的基本码本；以及向所述基本码本中的特定预编码矩阵分配相差，以形成含相差码本。通过应用生成码本的方法以及在无线通信系统、基站和终端中使用所生成的码本，降低了从客户端向基站侧的反馈开销，并保持了良好的对多天线阵列的反馈精度。

Provide CQI feedback with common code speed to a transmitting station

Un procedimiento, que comprende: transmitir mediante una estación receptora (220), a una estación transmisora (210), un primer indicador de calidad de canal, CQI, para indicar a la estación transmisora (210) un primer nivel de modulación y una velocidad de código común, donde el primer nivel de modulación será usado por la estación transmisora (210) para transmitir un primer flujo de señales a la estación receptora (220), y donde la velocidad de código común será usada por la estación transmisora para transmitir el primer flujo y k-1 flujos adicionales de señales a la estación receptora, donde k es un entero mayor que 1; y transmitir mediante la estación receptora (220), a la estación transmisora (210), k-1 CQI adicionales para indicar a la estación transmisora (210) k-1 niveles de modulación que serán usados por la estación transmisora (210) para transmitir k-1 flujos adicionales de señales a la estación receptora (220), donde cada uno de los k-1 CQI adicionales tiene un tamaño de datos de uno o dos bits, donde el uno o dos bits indican niveles de modulación respectivos con respecto al primer nivel de modulación. A method, comprising: transmitting through a receiving station (220), to a transmitting station (210), a first channel quality indicator, CQI, to indicate to the transmitting station (210) a first modulation level and a speed of common code, where the first modulation level will be used by the transmitting station (210) to transmit a first signal flow to the receiving station (220), and where the common code rate will be used by the transmitting station to transmit the first flow and k-1 additional signal flows to the receiving station, where k is an integer greater than 1; and transmit by means of the receiving station (220), to the transmitting station (210), additional k-1 CQI to indicate to the transmitting station (210) k-1 modulation levels that will be used by the transmitting station (210) to transmit k-1 additional signal flows to the receiving ...

Method and system for an alternating channel delta quantizer for MIMO pre-coders with finite rate channel state information feedback

Aspects of a method and system for an alternating channel delta quantizer for MIMO pre-coders with finite rate channel state information feedback may include quantizing a change in channel state information in a MIMO pre-coding system onto a codebook using a cost function and selecting the codebook from a set of codebooks; and generating the set of codebooks from a plurality of codebooks, where each may comprise one or more unitary matrices. The channel state information may be a matrix V that may be generated using Singular Value Decomposition (SVD) and/or Geometric Mean Decomposition (GMD). The selecting of the codebooks may be enabled by alternating between the elements of the set of codebooks. The cost function f(A) may be defined by the following relationship: f ⁡ ( A ) = ( 1 N ⁢ ∑ j = 1 N ⁢  a jj  2 ) where A is a matrix of size N by N and a ij is element (i,j) of matrix A.

Channel quality report processes, circuits and systems

An electronic device includes a first circuit (111) operable to generate at least a first and a second channel quality indicator (CQI) vector associated with a plurality of subbands for each of at least first and second spatial codewords respectively and generate a first and a second reference CQI for the first and second spatial codewords, and operable to generate a first and a second differential subbands CQI vector for each spatial codeword and generate a differential between the second reference CQI and the first reference CQI, and further operable to form a CQI report derived from the first and the second differential subbands CQI vector for each spatial codeword as well as the differential between the second reference CQI and the first reference CQI; and a second circuit (113) operable to initiate transmission of a signal communicating the CQI report. Other electronic devices, processes and systems are also disclosed.

Method and apparatus for transmitting/receiving feedback information in a wireless packet data communication system

Methods and apparatuses are provided for transmitting feedback information in a communication system supporting multiple transmission methods with multi antenna transmission. Information for a default Multiple Input Multiple Output (MIMO) mode is received. It is determined whether the default MIMO mode is a Single-User MIMO mode or a Multi-User MIMO mode based on the information for the default MIMO mode. First Channel Quality Indicator (CQI) feedback information is calculated for one of the Single-User MIMO mode and the Multi-User MIMO mode determined as the default MIMO mode. The first CQI feedback information and DELTA CQI feedback information, which is a differential value between the first CQI feedback information and second CQI feedback information for a non-default MIMO mode, are transmitted.

Method and system for an alternating delta quantizer for limited feedback MIMO pre-coders

Aspects of a method and system for an alternating delta quantizer for limited feedback MIMO pre-coders may comprise quantizing a change in channel state information in a MIMO pre-coding system onto at least a first and a second codebook, each of which comprises one or more unitary matrices, using a cost function; feeding back, in an alternating manner, an index to an element of at least the first codebook or the second codebook, associated with the quantizing, from a receiver to a transmitter in said MIMO pre-coding system, and generating the at least first and second codebook based on at least the channel state information. The channel state information may be a matrix V and the cost function may be defined by the following relationship: f ⁡ ( A ) = ( 1 N ⁢ ∑ j = 1 N ⁢  a jj  2 ) where A is a matrix of size N by N and aij is element (i,j) of matrix A.

Transmission of precoding codebook over an air interface

Embodiments of the present invention include a system for transmitting a precoding codebook over an air interface. The system includes a first station configured to signal a set of indicators via at least one antenna to a second station from which the precoding codebook is derived at the second station based on the signaled set of indicators. The set of indicators includes less information than the precoding codebook.

Apparatus and method for transmitting and receiving feedback information in a wireless communication system

본 개시는 LTE와 같은 4G 통신 시스템 이후 보다 높은 데이터 전송률을 지원하기 제공될 5G 또는 pre-5G 통신 시스템에 관련된 것이다. 본 발명의 실시예들은 빔포밍 MIMO 무선 통신시스템에서 성능 열화없이 복잡도와 오버헤드를 최소화하는 빔 선택 및 피드백 장치와 방법을 제공한다. 본 발명의 일 실시예에 따르면, 무선 통신 시스템의 단말 장치는, 다수의 송수신빔 조합들 중에서 적어도 하나의 빔 조합을 선택하는 제어부와, 상기 적어도 하나의 빔 조합이 이전의 최적 빔 조합과 동일한지 여부를 지시하는 지시 정보를 포함하는 피드백 정보를 송신하는 송신기를 포함한다.

A method of transmitting at least one sub-packet based on feedback information in a wireless communication system

Method and apparatus of codebook-based single-user closed-loop transmit beamforming (SU-CLTB) for OFDM wireless systems

A method includes broadcasting, at a transmitter, messages comprising antenna configuration, antenna spacing and a number of antenna of the transmitter and reference signals; generating, at a receiver, a codebook comprising a plurality of antenna beams based on the broadcasted messages; receiving, at the receiver, the broadcasted reference signals; selecting, at the receiver, an antenna beam among the plurality of antenna beams within the codebook in dependence upon a predetermined performance criteria of a data communication system and in dependence upon the broadcasted reference signals; feedbacking to the transmitter, at the receiver, information comprising the antenna beam selected by the receiver; optimizing, at the transmitter, a beamforming process by utilizing the feedback information from the receiver; transmitting, at the transmitter, data signals by utilizing the optimized beamforming process; and receiving and processing, at the receiver, the data signals in dependence upon the selected antenna beams within the codebook.

Method, mobile station and base station for transmitting data in mobile communication system

Data in a mobile communications system is transmitted on at least one channel between at least one base station with multiple antennas and at least one user equipment. A base station applies precoding to the data based on a set of predefined codebooks. A first tracking mode with a first codebook from the set of predefined codebooks is used for the precoding, and at least a second tracking mode with at least a second codebook from the set of predefined codebooks is used for the precoding. The base station switches between the first tracking mode and the second tracking mode depending on at least one condition of the channel.

Closed-loop transmitting antenna diversity method, base station apparatus and mobile station apparatus therefor, in a next generation mobile telecommunications system

A closed-loop transmitting antenna diversity method, and a base station and mobile station apparatus therefore in a next generation mobile telecommunications system, the closed-loop transmitting antenna diversity method having a plurality of antennas in a mobile telecommunications system, including the steps of (a) measuring the changed amount per unit time of the phase difference between antennas for each of the plurality of antennas which are used in a base station; (b) transmitting the result of measuring as feedback information for adjusting transmitting antenna diversity; (c) receiving and interpreting feedback information in the base station; (d) calculating the weighted value of array antennas for each antenna, using the interpreted feedback information; and (e) multiplying data which is to be transmitted from the base station to a mobile station by the array antenna weighted value, and outputting the result through a corresponding antenna. Here, the changed amount per unit time of the phase difference between antennas is obtained by subtracting the previous phase difference between antennas which the base station knows from the phase difference between antennas which is calculated by a current mobile station.

Mimo beamforming method and method of constructing a differential codebook for a wireless network

A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at a subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network.

Difference CSI report for higher resolution channel state information (CSI)

提供了用于高分辨率信道状态信息(CSI)的差分CSI报告的技术和装置。一种技术包括接收CSI参考信号(CSI‑RS)。基于CSI‑RS来确定针对第一CSI反馈级的与第一CSI反馈相关联的第一反馈分量，并且将第一反馈分量报告给基站。部分地基于第一反馈分量来确定针对至少一个第二CSI反馈级的与至少一个第二CSI反馈相关联的第二反馈分量，并且向基站报告第二反馈分量。基于第一反馈分量和第二反馈分量来确定用于多输入多输出(MIMO)通信的预编码。

Channel quality indicator acquisition method, user equipment, and evolved node b and system

This application relates to a method for acquiring a channel quality indicator, a user equipment, an evolved node B and a system. The method includes: calculating subband channel quality indicators CQIs of at least two subbands, where there is an overlapped resource block between the subbands; and transmitting the subband CQIs to an evolved node B eNB. In the method for acquiring a channel quality indicator, the user equipment, the evolved node B and the system of the present application, there is an overlapped resource block between adjacent subbands, and meanwhile the channel quality of the resource block of the subband is obtained by using different subbands, thus the feedback accuracy of the channel quality of the resource block of each subband, especially the channel quality of the resource block in the subband overlapping area, thereby improving the granularity of frequency-selective scheduling, and improving the frequency-selective scheduling and the link adaptation, and therefore, the system throughput is increased.

MIMO beamforming method and method of constructing a differential codebook for a wireless network

一种MIMO波束形成方法包括在基站接收有关理想波束形成矩阵与平均波束形成方向之间差异的信息，使用该信息在基站构建波束形成矩阵，以及使用重新构建的波束形成矩阵来执行波束形成操作。备选的是，方法包括在订户站计算平均波束形成方向，在订户站计算对应于差分码本中差分矩阵的量化索引，以及跨无线网络的无线信道来传送量化索引。通过识别码本中心并变换存储在无线网络的组件的存储器中的预定义码本，可构建差分码本。

Mimo feedback schemes for cross-polarized antennas

A method includes receiving a Multiple-Input Multiple Output (MIMO) signal over multiple communication channels from an antenna array (40) including a first set of antennas (44A...44D) having a first polarization and a second set of the antennas (48 A...48D) having a second polarization that is orthogonal to the first polarization. First feedback information is calculated relating to first interrelations between the antennas within either the first set or the second set. Second feedback information is calculated relating at least to second interrelations between the first set and the second set of the antennas. The first feedback information is transmitted at a first time/frequency granularity, and the second feedback information is transmitted at a second time/frequency granularity that is finer than the first time/frequency granularity.

Detection and mitigation of antenna element failures

In order to address the potential for antenna failure in large antenna arrays, a method, a computer-readable medium, and an apparatus are provided for wireless communication, e.g., at a base station or CPE. The apparatus detects a failure of a plurality of antenna elements in an antenna array associated with an antenna module in an antenna array comprising a plurality of antenna modules. The apparatus then applies a mitigation procedure in response to detecting the failure, e.g., when a fraction of antenna elements for which a failure is detected meets a threshold. The mitigation procedure may include any of switching to a different codebook, increasing DL or UL transmission power, or a VGA. The failure may be detected by transmitting pilot signals using sets of antenna elements of the antenna array and using signal strength measurements to detect antenna element failures.

Wireless communication system, terminal device, base station device, method of wireless communication in wireless communication system

本发明涉及无线通信系统，其在基站装置与终端装置之间进行无线通信，上述终端装置具备：保持部，其保持预编码矩阵；相对值决定部，其决定与保持的上述预编码矩阵中包含的参数对应的相对值；以及发送部，其发送上述决定的相对值，上述基站装置具有接收上述相对值的接收部。