公开(公告)号：US20040146018A1

公开(公告)日：2004-07-29

申请号：US10693535

申请日：2003-10-23

Inventor： J. Rodney Walton ,  John W. Ketchum ,  Mark S. Wallace ,  Steven J. Howard

IPC: H04Q007/00 ,  H04Q007/28

CPC classification number: H04L5/0048 ,  H04B7/0417 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0628 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04B7/0871 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/006 ,  H04L25/0226 ,  H04L25/0248 ,  H04L25/0256 ,  H04L25/03955 ,  H04L25/03968 ,  H04W16/28 ,  H04W52/50

Abstract: A user terminal supports multiple spatial multiplexing (SM) modes such as a steered mode and a non-steered mode. For data transmission, multiple data streams are coded and modulated in accordance with their selected rates to obtain multiple data symbol streams. These streams are then spatially processed in accordance with a selected SM mode (e.g., with a matrix of steering vectors for the steered mode and with the identity matrix for the non-steered mode) to obtain multiple transmit symbol streams for transmission from multiple antennas. For data reception, multiple received symbol streams are spatially processed in accordance with the selected SM mode (e.g., with a matrix of eigenvectors for the steered mode and with a spatial filter matrix for the non-steered mode) to obtain multiple recovered data symbol streams. These streams are demodulated and decoded in accordance with their selected rates to obtain multiple decoded data streams.

Abstract translation: 用户终端支持诸如转向模式和非转向模式的多个空间复用（SM）模式。 对于数据传输，根据所选择的速率对多个数据流进行编码和调制以获得多个数据符号流。 然后根据选定的SM模式（例如，利用用于转向模式的导向矢量矩阵和非导向模式的单位矩阵）对这些流进行空间处理，以获得用于从多个天线发射的多个发射符号流。 对于数据接收，根据所选择的SM模式（例如，利用用于转向模式的特征向量矩阵和用于非转向模式的空间滤波器矩阵）来对多个接收到的符号流进行空间处理，以获得多个恢复的数据符号流 。 这些流根据其选择的速率进行解调和解码，以获得多个解码的数据流。

公开(公告)号：US20180102869A1

公开(公告)日：2018-04-12

申请号：US15838258

申请日：2017-12-11

Applicant: Collision Communications, Inc.

Inventor： Brandon Hombs ,  Sayak Bose

IPC: H04L1/00 ,  H04L25/03

CPC classification number: H04L1/005 ,  H04L25/03968 ,  H04L2025/03356 ,  H04L2025/03611

Abstract: An improved receiver design implements a method for modeling users in SIC turbo loop multiuser detection architectures that reduces the number of implementation cycles, and thereby reduces the computational overhead associated with computing the inverse of the received signal covariance matrix, by efficiently reusing components of a QR decomposition. By reusing some of the computational results from the previous turbo loop's equalizer calculation, the disclosed receiver significantly reduces the computational burden of updating the linear equalizer on each turbo loop. Depending on the embodiment, this reduction can be accomplished in at least two different ways, depending on the dimensionality and other aspects of the implementation.

公开(公告)号：US09838094B2

公开(公告)日：2017-12-05

申请号：US15122626

申请日：2014-12-15

Applicant: LG ELECTRONICS INC.

Inventor： Kilbom Lee ,  Jiwon Kang ,  Kitae Kim

IPC: H04B7/04 ,  H04B7/06 ,  H04W72/04 ,  H04B7/0456 ,  H04B7/0413

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04L25/03343 ,  H04L25/03968 ,  H04W72/042

Abstract: Disclosed herein is a method for generating transmitted signals. The method includes selecting a reference resource element (RE) from an RE group including a plurality of REs, generating a common precoder to be shared among the plurality of REs of the RE group based on channel information of the reference RE, generating primary signals, which are precoding signals of the plurality of REs, by applying the common precoder to transmitted data for the plurality of REs, and generating secondary signals by compensating for the primary signals of the REs except for the reference RE among the plurality of REs using channel information of the REs.

公开(公告)号：US20170279547A1

公开(公告)日：2017-09-28

申请号：US15618275

申请日：2017-06-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Sha Hu ,  Fredrik Rusek ,  Jianjun Chen

IPC: H04B17/336 ,  H04L1/00 ,  H04B7/0456 ,  H04L25/02 ,  H04B17/327

CPC classification number: H04B17/336 ,  H04B7/0413 ,  H04B7/0456 ,  H04B17/327 ,  H04L1/0054 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/0246 ,  H04L25/03898 ,  H04L25/03968 ,  H04L2025/03426 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/444

Abstract: An apparatus including a processor configured to receive a digital communication signal, wherein the digital communication signal includes a common reference signal and transmitted data. The processor determines a first interfering channel matrix for a first interfering cell based on a channel estimation of the common reference signal, and estimates a first power offset ratio and a first effective pre-coding matrix for the first interfering cell by evaluating a maximum likelihood metric, wherein the maximum likelihood metric is based on a first interfering channel correlation. The processor then reconstructs a channel covariance matrix based on the estimated first power offset ratio and the first effective pre-coding matrix and detects the transmitted data based on the reconstructed channel covariance matrix.

公开(公告)号：US20160028558A1

公开(公告)日：2016-01-28

申请号：US14339214

申请日：2014-07-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Li Guo

IPC: H04L25/02 ,  H04L25/03

CPC classification number: H04L25/021 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/03 ,  H04L25/03114 ,  H04L25/03968 ,  H04L2025/03426

Abstract: A method of estimating interference in a received signal is disclosed. The method includes receiving a plurality of subcarriers from a remote transmitter. Each of the subcarriers is multiplied by a control signal. At least two of the subcarriers are compared to produce a differential signal. Interference is estimated in response to the differential signal.

Abstract translation: 公开了一种估计接收信号中的干扰的方法。 该方法包括从远程发射机接收多个子载波。 每个子载波乘以控制信号。 将至少两个子载波进行比较以产生差分信号。 干扰是根据差分信号估计的。

公开(公告)号：US20150263813A1

公开(公告)日：2015-09-17

申请号：US14643746

申请日：2015-03-10

Applicant: MULTIPHY LTD.

Inventor： Albert GORSHTEIN ,  Guy DORMAN ,  Dan SADOT

IPC: H04B10/61 ,  H04B10/2575 ,  H04B7/04 ,  H04B10/40 ,  H04L27/18 ,  H04L25/03 ,  H04L7/00 ,  H04J14/06

CPC classification number: H04B10/6166 ,  H04B7/0413 ,  H04B10/2575 ,  H04B10/40 ,  H04J14/06 ,  H04L7/0062 ,  H04L25/03 ,  H04L25/03114 ,  H04L25/03968 ,  H04L27/18 ,  H04L27/2096

Abstract: The present invention is directed to a MIMO equalization system and method, optimized for baud rate clock recovery in coherent symbol-spaced DP-QPSK Metro systems. According to this method, the Mueller & Muller timing function is extended to cope with controlled ISI induced signals, while decoupling between MIMO equalization and clock recovery loops, using a midpoint output of the equalizer for timing estimation, instead of its final output. At least a portion of controlled Inter-Symbol Interference (ISI) is kept intact and the controlled ISI is compensated by an MLSE, right after carrier timing synchronization.

Abstract translation: 本发明涉及针对相干符号间隔的DP-QPSK地铁系统中的波特率时钟恢复而优化的MIMO均衡系统和方法。 根据该方法，Mueller＆Muller定时功能被扩展以应对受控的ISI感应信号，同时使用均衡器的中点输出而不是其最终输出来在MIMO均衡和时钟恢复环路之间去耦。 控制的符号间干扰（ISI）的至少一部分保持完整，受控的ISI由载波定时同步之后的MLSE补偿。

公开(公告)号：US20150244546A1

公开(公告)日：2015-08-27

申请号：US14620177

申请日：2015-02-11

Applicant: Panasonic Corporation

Inventor： YOSHINORI SHIRAKAWA ,  NAGANORI SHIRAKATA ,  KOICHIRO TANAKA ,  HIROYUKI MOTOZUKA

IPC: H04L25/03 ,  H04B1/12 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04L27/265 ,  H04B1/123 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/03159 ,  H04L25/03968

Abstract: An equalization method includes carrying out frequency domain conversion of M received signals into a 2M received vector having 2M elements, carrying out channel estimation and noise/interference estimation based on the 2M vector, calculating a 2M channel vector and a (2M)×(2M) noise/interference matrix, selecting a 2M−1 or less channel vector from the calculated 2M channel vector, selecting a (2M−1)×(2M−1) or less noise/interference matrix from the calculated (2M)×(2M) noise/interference matrix, calculating a 2M−1 or less equalization coefficient vector as equalization coefficients based on the selected 2M−1 channel vector and the selected (2M−1)×(2M−1) noise/interference matrix, selecting a 2M−1 or less received vector from the 2M received vector, and equalizing the selected 2M−1 received vector by using the calculated equalization coefficients.

Abstract translation: 一种均衡方法包括：将M个接收信号的频域转换为具有2M个元素的2M接收向量，基于2M向量执行信道估计和噪声/干扰估计，计算2M信道向量和（2M）×（2M ）从所计算的2M信道向量中选择2M-1或更少的信道向量，从所计算的（2M）×（2M）的噪声/干扰矩阵中选择（2M-1）×（2M-1） ）噪声/干扰矩阵，基于所选择的2M-1信道向量和所选择的（2M-1）×（2M-1）个噪声/干扰矩阵，计算2M-1或更小的均衡系数向量作为均衡系数，选择2M -1或更小的接收向量，并且通过使用所计算的均衡系数来均衡所选择的2M-1个接收向量。

公开(公告)号：US20150131753A1

公开(公告)日：2015-05-14

申请号：US14404122

申请日：2013-04-12

Applicant: NEC Corporation

Inventor： Yasushi Maruta ,  Duong Pham

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0452 ,  H04B7/0473 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04L5/006 ,  H04L25/03904 ,  H04L25/03968

Abstract: This method of generating precoders is used in optimising transmission capacity between an eNodeB and UEs in a DL MU-MIMO communication system. The method includes the steps of computing correlation values between pairs of precoding matrices (PMs) of the reported precoding matrix indicators (PMIs) (step 40), selecting a PM pair having a minimum correlation value (step 42). If the minimum correlation value is less than a lower threshold Tmin, the method uses a PM corresponding to the received PMI (step 44). If the minimum correlation value is greater than Tmin and less than an upper threshold Tmax, the method includes the steps of computing correlation values of the reported PMI and Channel Matrices (CMs) from a fixed codebook of representative CMs (step 48), selecting a CM pair having a maximum correlation value (step 52), and computing precoders from the selected CM pair (step 54).

Abstract translation: 这种生成预编码器的方法用于优化DL MU-MIMO通信系统中的eNodeB和UE之间的传输容量。 该方法包括以下步骤：计算报告的预编码矩阵指示符（PMI）的预编码矩阵（PM）对之间的相关值（步骤40），选择具有最小相关值的PM对（步骤42）。 如果最小相关值小于下限阈值Tmin，则该方法使用与接收到的PMI相对应的PM（步骤44）。 如果最小相关值大于Tmin且小于上阈值Tmax，则该方法包括以下步骤：从代表CM的固定码本计算所报告的PMI和信道矩阵（CM）的相关值（步骤48），选择 CM对具有最大相关值（步骤52），以及从所选择的CM对计算预编码器（步骤54）。

公开(公告)号：US20150131751A1

公开(公告)日：2015-05-14

申请号：US14236229

申请日：2011-08-01

Applicant: Alireza Bayesteh ,  Amin Mobasher ,  Shiguang Guo

Inventor： Alireza Bayesteh ,  Amin Mobasher ,  Shiguang Guo

IPC: H04B7/04 ,  H04W36/20

CPC classification number: H04B7/0482 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0486 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0391 ,  H04L25/03968 ,  H04W36/20

Abstract: Systems and methods can implemented to joint transmission for interference management in wireless communications. A first transmitter having M antennas can acquire a channel state information (CSI) matrix for each of a plurality of multiple-input-multiple output (MIMO) channels between a first transmitter and a plurality of receivers. The first transmitter can determine transmission ranks, wherein each of the transmission ranks corresponds to a number of one or more data streams to be transmitted from both the first transmitter and a second transmitter to a receiver of the plurality of receivers. A maximum transmission rank may be identified from the determined transmission ranks. Transmit data can be generated that include the one or more data streams to each of the corresponding plurality of receivers. A precoding matrix can be generated for the generated transmit data based, at least in part, on the acquired CSI matrix. The first transmitter can then encode the transmit data using the corresponding generated precoding matrix.

Abstract translation: 系统和方法可以实现用于联合传输用于无线通信中的干扰管理。 具有M个天线的第一发射机可以获取第一发射机和多个接收机之间的多个多输入多输出（MIMO）信道中的每一个的信道状态信息（CSI）矩阵。 第一发射机可以确定传输秩，其中每个传输等级对应于要从第一发射机和第二发射机两者发送到多个接收机的接收机的一个或多个数据流的数量。 可以从确定的传输等级识别最大传输等级。 可以生成包括到相应的多个接收器中的每一个的一个或多个数据流的发送数据。 至少部分地基于所获取的CSI矩阵，可以为所生成的发送数据生成预编码矩阵。 然后，第一发射机可以使用相应的生成的预编码矩阵对发射数据进行编码。

公开(公告)号：US20150063479A1

公开(公告)日：2015-03-05

申请号：US14361705

申请日：2013-06-04

Applicant: EMPIRE TECHNOLOGY DEVELOPMENT LLC

Inventor： Yue Xiao ,  Jian Zhang ,  Jun Fang

IPC: H04L27/26

CPC classification number: H04L27/2601 ,  H04B7/0413 ,  H04L25/03968 ,  H04L27/26 ,  H04L27/2647 ,  H04L27/2655

Abstract: Embodiments of the present disclosure may generally relate to methods for processing a response matrix of a communication system. One example method may comprise dividing the response matrix into a plurality of clusters. The number of the clusters is associated with the number of subcarriers of the communication system, and the clusters are indexed in sequence as even-indexed clusters and odd-indexed clusters. The method may further comprise estimating data transmitted by a first set of transmit antennas of the communication system through a first subcarrier and a second subcarrier of the subcarriers associated with a first even-indexed cluster. The method may further comprise modifying a first receive vector of the communication system based on the estimated data transmitted by the first set of transmit antennas as a second receive vector of the communication system.

Abstract translation: 本公开的实施例通常可以涉及用于处理通信系统的响应矩阵的方法。 一个示例性方法可以包括将响应矩阵划分成多个聚类。 簇的数量与通信系统的子载波数量相关联，并且簇被依次索引为均匀索引的簇和奇数索引簇。 该方法还可以包括通过与第一偶数索引簇相关联的子载波的第一子载波和第二子载波来估计由通信系统的第一组发射天线发射的数据。 该方法还可以包括基于由第一组发射天线发送的估计数据作为通信系统的第二接收向量来修改通信系统的第一接收向量。