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1.发明授权Method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook 有权在使用码本的多用户多输入多输出（MIMO）通信系统中波束成形的方法和系统公开(公告)号：US08594161B2
公开(公告)日：2013-11-26
申请号：US13349282
申请日：2012-01-12
CPC分类号： H04L25/03343 , H04L1/0026 , H04L1/0618 , H04L2025/03426 , H04L2025/03802
摘要： A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (WR). The interference cancellation matrix, also referred to as a matched filter, may enable a composite signal (Y) to be represented as a plurality of subsidiary signals (yi), each of which is transmitted by the node B for reception at a corresponding ith UE station. Each of the subsidiary signals yi may be generated based on a corresponding one of a plurality of data stream signals (xi). The processor may enable generation of a precoding matrix (WT) based on the interference cancellation matrix. A transmitter within the node B may enable generation of a plurality of signals based on the precoding matrix. The signals may be transmitted via a wireless communication medium.
摘要翻译： 在使用码本的多用户多输入多输出（MIMO）通信系统中的波束成形的方法和系统可以包括能够产生干扰消除矩阵（WR）的节点B中的处理器。 也称为匹配滤波器的干扰消除矩阵可以使得复合信号（Y）能够被表示为多个辅助信号（yi），每个辅助信号由节点B发送以在对应的第i个UE处接收 站。 辅助信号yi中的每一个可以基于多个数据流信号（xi）中的对应的一个生成。 处理器可以使得能够基于干扰消除矩阵生成预编码矩阵（WT）。 节点B内的发射机可以使得能够基于预编码矩阵生成多个信号。 信号可以经由无线通信介质发送。
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公开(公告)号：US20090199062A1
公开(公告)日：2009-08-06
申请号：US12362543
申请日：2009-01-30
CPC分类号： H03M13/2957 , H03M13/2739 , H03M13/6306 , H03M13/6356 , H03M13/6362 , H03M13/653 , H04L1/005 , H04L1/0066 , H04L1/0067 , H04L1/1819
摘要： Virtual limited buffer modification for rate matching. A reduced-size memory module is employed within a communication device to assist in storage of log-likelihood ratios (LLRs) employed in accordance with turbo decoding. This architecture is also applicable to other types of error correction code (ECC) besides turbo code as well. The memory size is selected to match the number of coded bits (e.g., including information bits and redundancy/parity bits) that is included within a transmission. The received signals may be various transmissions made in accordance with hybrid automatic repeat request (HARQ) transmissions. When the LLRs calculated from a first HARQ transmission is insufficient to decode, those LLRs are selectively stored in the memory module. When LLRs corresponding to a second HARQ transmission is received, LLRs corresponding to both the first HARQ transmission and the second HARQ transmission are passed from the memory module for joint use in decoding.
摘要翻译： 用于速率匹配的虚拟限制缓冲区修改。 在通信设备内采用缩小尺寸的存储器模块以帮助存储根据turbo解码所采用的对数似然比（LLR）。 该架构也适用于除turbo码之外的其他类型的纠错码（ECC）。 选择存储器大小以匹配包含在传输内的编码比特数（例如，包括信息比特和冗余/奇偶校验比特）。 所接收的信号可以是根据混合自动重传请求（HARQ）传输而进行的各种传输。 当从第一HARQ传输计算的LLR不足以解码时，那些LLR被选择性地存储在存储器模块中。 当接收到对应于第二HARQ传输的LLR时，对应于第一HARQ传输和第二HARQ传输两者的LLR从存储器模块传递以用于解码。
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3.发明申请Method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers 有权用于发射机波束成形的方法和系统，用于降低复杂度的多输入多输出（MIMO）收发器公开(公告)号：US20080043873A1
公开(公告)日：2008-02-21
申请号：US11494962
申请日：2006-07-28
IPC分类号： H04L1/02
CPC分类号： H04B7/0617
摘要： Aspects of a method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers are presented. Aspects of the system may include a MIMO transmitter that computes a channel estimate matrix and decomposes the computed channel estimate matrix based on singular value decomposition (SVD). Singular values in a singular value matrix may be rearranged and grouped to generate a plurality of submatrices. In one aspect, each of the submatrices may be decomposed based on GMD at a MIMO transmitter, while a MIMO receiver may utilize a vertical layered space time (VLST) method. In another aspect, the MIMO transmitter may utilize Givens rotation matrices corresponding to each of the submatrices, while the MIMO receiver may utilize maximum likelihood (ML) detection.
摘要翻译： 提出了用于降低复杂度的多输入多输出（MIMO）收发器的用于发射机波束成形的方法和系统的方面。 系统的方面可以包括MIMO发射机，其计算信道估计矩阵并且基于奇异值分解（SVD）来分解所计算的信道估计矩阵。 奇异值矩阵中的奇异值可以被重新排列并分组以产生多个子矩阵。 在一个方面，每个子矩阵可以在MIMO发射机处基于GMD分解，而MIMO接收机可以利用垂直分层空间时间（VLST）方法。 在另一方面，MIMO发射机可以利用与每个子矩阵相对应的Givens旋转矩阵，而MIMO接收机可以利用最大似然（ML）检测。
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4.发明授权Group identification and definition within multiple user, multiple access, and/or MIMO wireless communications 有权在多用户，多路访问和/或MIMO无线通信中的组识别和定义公开(公告)号：US09197298B2
公开(公告)日：2015-11-24
申请号：US12796655
申请日：2010-06-08
申请人： Joonsuk Kim , Matthew James Fischer , Peiman Amini , Joseph Paul Lauer , Vinko Erceg , Carlos H. Aldana , Eric J. Ojard , Sirikiat Lek Ariyavisitakul
发明人： Joonsuk Kim , Matthew James Fischer , Peiman Amini , Joseph Paul Lauer , Vinko Erceg , Carlos H. Aldana , Eric J. Ojard , Sirikiat Lek Ariyavisitakul
CPC分类号： H04B7/0452 , H04B7/0417 , H04B7/0643 , H04L1/0025 , H04L1/0065 , H04L1/1664 , H04L1/1671 , Y02D70/10
摘要： Group identification and definition within multiple user, multiple access, and/or MIMO wireless communications. A group identification definition field may be transmitted to a number of receiving devices for use in interpreting current or subsequently received packets that include a group identification field (group ID). The group ID can serve a number of functions such as indicating those receiving devices for which the packet is intended, the identification of fields within the packet corresponding to the various devices, certain parameters (e.g., code type, code rate, modulation type, etc.) associated with such fields within the packet, etc. The group identification definition field may be updated or modified to allow for modification of the manner in which subsequent packets, including respective group IDs, are processed. One of a variety of events may direct the group identification definition field may be updated or modified.
摘要翻译： 在多用户，多路访问和/或MIMO无线通信中的组识别和定义。 组识别定义字段可以被发送到多个接收设备，以用于解释包括组标识字段（组ID）的当前或随后接收的分组。 组ID可以服务于多个功能，例如指示分组所针对的接收设备，对应于各种设备的分组内的字段的识别，某些参数（例如，代码类型，码率，调制类型等） 。）可以更新或修改组标识定义字段，以允许对后续分组（包括各个组ID）进行处理的方式的修改。 各种事件之一可以指示组识别定义字段可以被更新或修改。
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公开(公告)号：US20120195398A1
公开(公告)日：2012-08-02
申请号：US13429553
申请日：2012-03-26
IPC分类号： H04L27/06
CPC分类号： H03M13/2957 , H03M13/2739 , H03M13/6306 , H03M13/6356 , H03M13/6362 , H03M13/653 , H04L1/005 , H04L1/0066 , H04L1/0067 , H04L1/1819
摘要： Virtual limited buffer modification for rate matching. A reduced-size memory module is employed within a communication device to assist in storage of log-likelihood ratios (LLRs) employed in accordance with turbo decoding. This architecture is also applicable to other types of error correction code (ECC) besides turbo code as well. The memory size is selected to match the number of coded bits (e.g., including information bits and redundancy/parity bits) that is included within a transmission. The received signals may be various transmissions made in accordance with hybrid automatic repeat request (HARQ) transmissions. When the LLRs calculated from a first HARQ transmission is insufficient to decode, those LLRs are selectively stored in the memory module. When LLRs corresponding to a second HARQ transmission is received, LLRs corresponding to both the first HARQ transmission and the second HARQ transmission are passed from the memory module for joint use in decoding.
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6.发明申请METHOD AND SYSTEM FOR ORTHOGONALIZED BEAMFORMING IN MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEMS 审中-公开用于多用户多输入多输出（MU-MIMO）通信系统中正交波束成像的方法和系统公开(公告)号：US20110176633A1
公开(公告)日：2011-07-21
申请号：US12834411
申请日：2010-07-12
CPC分类号： H04B7/0617
摘要： A method and system for orthogonalized beamforming in multiple user multiple input multiple output (MU-MIMO) communication systems are presented. Aspects of the method and system include an iterative method for computing a plurality of beamforming matrices in a MU-MIMO system. A transmitting station, such as an access point (AP) for example, may use computed channel estimates, and/or singular vector matrices, to compute orthogonal beamforming matrices. The computed orthogonal beamforming matrices may be used to generate a plurality of signals, which may be concurrently transmitted to the plurality of user devices.
摘要翻译： 提出了一种用于多用户多输入多输出（MU-MIMO）通信系统中正交波束成形的方法和系统。 该方法和系统的方面包括用于在MU-MIMO系统中计算多个波束形成矩阵的迭代方法。 诸如接入点（AP）的发射站可以使用计算的信道估计和/或奇异向量矩阵来计算正交波束形成矩阵。 所计算的正交波束形成矩阵可以用于生成可以同时发送到多个用户设备的多个信号。
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7.发明申请METHOD AND SYSTEM FOR ITERATIVE DISCRETE FOURIER TRANSFORM (DFT) BASED CHANNEL ESTIMATION USING MINIMUM MEAN SQUARE ERROR (MMSE) TECHNIQUES 有权使用最小平均误差（MMSE）技术的迭代离散傅里叶变换（DFT）基于信道估计的方法和系统公开(公告)号：US20110164557A1
公开(公告)日：2011-07-07
申请号：US12732975
申请日：2010-03-26
IPC分类号： H04W4/00
CPC分类号： H04L25/0204 , H04L1/005 , H04L5/0005 , H04L25/0206 , H04L25/024 , H04L25/0242 , H04L2025/03611 , H04W24/00 , H04W84/12
摘要： A method and system for iterative discrete Fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques are presented. Aspects of the method and system include a procedure for computing channel estimates in both the time domain and frequency domain (or mixed domain) using an iterative DFT method based on MMSE techniques. One aspect of the method and system may achieve low computational complexity and produce more accurate channel estimate values in low signal to noise ratio (SNR) regimes in comparison to conventional DFT-based channel estimation methods, which utilize least squares (LS) techniques. The method and system disclosed herein may be practiced in connection with a wide range of orthogonal frequency division multiplexing (OFDM) based systems, for example wireless local area networks (WLAN, for example IEEE 802.11 WLAN systems), and LTE systems.
摘要翻译： 提出了使用最小均方误差（MMSE）技术的基于迭代离散傅里叶变换（DFT）的信道估计的方法和系统。 该方法和系统的方面包括使用基于MMSE技术的迭代DFT方法计算时域和频域（或混合域）中的信道估计的过程。 与使用最小二乘（LS）技术的传统的基于DFT的信道估计方法相比，该方法和系统的一个方面可以实现低计算复杂度并且在低信噪比（SNR）方案中产生更准确的信道估计值。 本文公开的方法和系统可以结合宽范围的基于正交频分复用（OFDM）的系统，例如无线局域网（WLAN，例如IEEE 802.11 WLAN系统）和LTE系统来实施。
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8.发明申请METHOD AND SYSTEM FOR A MULTIPLE-STREAM SFBC/STBC USING ANGLE FEEDBACK 审中-公开使用角度反馈的多流SFBC / STBC的方法和系统公开(公告)号：US20110158362A1
公开(公告)日：2011-06-30
申请号：US12708025
申请日：2010-02-18
CPC分类号： H04L1/0625 , H04B7/0417 , H04B7/0623 , H04B7/0669 , H04B7/068 , H04L1/0606 , H04L1/0681
摘要： Aspects of a method and system for a multiple-stream SFBC/STBC using angle feedback are presented. In one aspect of the method and system signals from M distinct spatial streams (NSS=M) are utilized to generate a plurality of 2M distinct transmit chain signals (NTX=2M) that are concurrently transmitted via a plurality of 2M transmitting antennas by a transmitting station. The set of concurrently transmitted transmit chain signals may be received at a receiving station via a plurality of NRX receiving antennas, where NRX≧M. The receiving station may compute a rotation angle value for each of a plurality of M−1 spatial streams among the plurality of M spatial streams. The receiving station may communicate the computed rotation angle values to the transmitting station. The transmitting station may utilize the received rotation angle values to generate subsequent concurrently transmitted signals.
摘要翻译： 提出了使用角度反馈的多流SFBC / STBC的方法和系统的方面。 在该方法的一个方面和来自M个不同空间流（NSS = M）的系统信号被用于产生多个2M个不同的发送链信号（NTX = 2M），其通过发送的多个2M发送天线同时发送 站。 可以在接收站处经由多个NRX接收天线接收并发发射链信号的集合，其中NRX≥M。 接收站可以计算多个M个空间流中的多个M-1个空间流中的每一个的旋转角度值。 接收站可以将计算的旋转角度值传送给发射站。 发射站可以利用接收到的旋转角度值来产生随后的并发发射信号。
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公开(公告)号：US08229039B2
公开(公告)日：2012-07-24
申请号：US12273506
申请日：2008-11-18
CPC分类号： H04L1/1835 , H03M13/09 , H03M13/2957 , H03M13/6306 , H04L1/0066 , H04L1/1819
摘要： Flexible rate matching. No constraints or restrictions are placed on a sending communication device when effectuating rate matching. The receiving communication device is able to accommodate received transmissions of essentially any size (e.g., up to an entire turbo codeword that includes all systematic bits and all parity bits). The receiving communication device employs a relatively small-sized memory to ensure a lower cost, smaller sized communication device (e.g., handset or user equipment such as a personal wireless communication device). Moreover, incremental redundancy is achieved in which successive transmissions need not include repeated information therein (e.g., a second transmission need not include any repeated information from a first transmission). Only when reaching an end of a block of bits or codeword to be transmitted, and when wrap around at the end of such block of bits or codeword occurs, would any repeat of bits be incurred within a later transmission.
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10.发明申请METHOD AND SYSTEM FOR MULTIBAND USER SCHEDULING IN A MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEM 审中-公开用于多用户多输入多输出（MU-MIMO）通信系统中的多用户调度的方法和系统公开(公告)号：US20110164578A1
公开(公告)日：2011-07-07
申请号：US12720945
申请日：2010-03-10
IPC分类号： H04W72/04
CPC分类号： H04L5/003 , H04L5/0016
摘要： A method and system for multiband user scheduling in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system a plurality of users in a user group may be selectively assigned to individual frequency bands among a plurality of frequency bands (referred to as a multiband). In an exemplary aspect, a modified greedy user scheduling algorithm may be utilized for assigning users, selected from the user group, to each of the frequency bands. Assigned users for a given frequency band are determined based on channel norm values computed for each of the users in the user group and on chordal distances computed between users in the user group. Pairs of users, selected from the user group, are assigned to each frequency band in the multiband to maximize aggregate data rate capacity for the MIMO communication system.
摘要翻译： 提出了一种多用户多输入多输出（MU-MIMO）通信系统中多频段用户调度的方法和系统。 在方法和系统的一个方面，用户组中的多个用户可以被选择性地分配给多个频带（被称为多频带）中的各个频带。 在示例性方面，可以使用修改的贪心用户调度算法来将从用户组中选择的用户分配给每个频带。 基于针对用户组中的每个用户计算的信道范数值以及在用户组中的用户之间计算的弦距来确定给定频带的分配用户。 从用户组中选择的成对用户被分配给多频带中的每个频带，以最大化MIMO通信系统的汇总数据速率容量。
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