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71. 发明授权

US08073486B2 Methods for opportunistic multi-user beamforming in collaborative MIMO-SDMA 有权
标题翻译：协同MIMO-SDMA中机会多用户波束成形的方法
公开(公告)号：US08073486B2
公开(公告)日：2011-12-06
申请号：US11535679
申请日：2006-09-27
申请人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
发明人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
IPC分类号： H04M1/00
CPC分类号： H04B7/0456 , H04B7/0417 , H04B7/043 , H04W4/00 , H04W16/28 , H04W24/02 , H04W24/06 , H04W24/10 , H04W72/0413 , H04W72/042 , H04W84/12 , H04W88/08
摘要： A system and method for opportunistically designing collaborative beamforming vectors is disclosed for a wireless multiple input, multiple output (MIMO) space division multiple access (SDMA) communication system by sequentially designing beamforming vectors for ranked channels in order to exploit the instantaneous channel conditions to improve per user average SNR performance. Each subscriber station independently transmits information to a base station that allows the base station to determine beamforming vectors for each subscriber station by ranking the subscriber stations by channel strength. Using sequential nullspace methods, the ranked channel matrices are then used to select the channel matrix Hi for the best subscriber station, to design the wi, vi for the best subscriber station as the left and right singular vectors of the MIMO channel matrix Hi, to transform the remaining channels and to continue the process until beamforming vectors are designed for all channels.
摘要翻译：为无线多输入多输出（MIMO）空分多址（SDMA）通信系统公开了一种用于机会设计协同波束成形向量的系统和方法，通过对排序的信道顺序设计波束成形向量，以利用瞬时信道条件来改善每用户平均SNR性能。每个用户站独立地向基站发送信息，该基站允许基站通过信道强度对用户站进行排序来确定每个用户站的波束成形向量。使用顺序零空间方法，然后使用排序的信道矩阵来选择用于最佳用户站的信道矩阵Hi，以将最佳用户站的wi，vi设计为MIMO信道矩阵Hi的左和右奇异向量，以转换剩余的信道并继续处理，直到为所有信道设计波束成形向量。

72. 发明授权

US08073069B2 Multi-user MIMO-SDMA for finite rate feedback systems 有权
标题翻译：用于有限速率反馈系统的多用户MIMO-SDMA
公开(公告)号：US08073069B2
公开(公告)日：2011-12-06
申请号：US11620203
申请日：2007-01-05
申请人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
发明人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
IPC分类号： H04B7/02
CPC分类号： H04B7/0417 , H04B7/0632 , H04B7/0634 , H04B7/0857 , H04B7/086 , H04L5/14 , H04W88/02 , H04W88/08
摘要： A multi-user MIMO downlink beamforming system with limited feedback (200) is provided to enable preceding for multi-stream transmission, where a channel codeword (ui) and one or more channel quality indicator values (CQIA, CQIB) are computed at the user equipment (201.i) on the basis of maximizing a predetermined SINR performance metric (ρi) which estimates the receive signal-to-noise-ratio (SINR) at the user equipment (201.i). The computed codeword (ui) and CQI values (or differential values related thereto) are quantized and fed back to help the base station (210) which applies a correction to the appropriate CQI value in the course of designing the transmit beamforming vectors w and determining the appropriate modulation and coding level to be used for downlink data transmission.
摘要翻译：提供了一种具有有限反馈（200）的多用户MIMO下行链路波束成形系统，用于在多流传输之前进行通信码字（ui）和一个或多个信道质量指示符值（CQIA，CQIB）在用户处的计算基于最大化用户设备（201.i）处的接收信噪比（SINR）的预定SINR性能度量（＆rgr; i）的基础，设备（201.i）。计算的码字（ui）和CQI值（或与其相关的差分值）被量化并被反馈以帮助在设计发送波束形成向量w的过程中对适当的CQI值应用校正的基站（210），并且确定适用于下行数据传输的调制和编码级别。

73. 发明授权

US07702029B2 MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding 有权
标题翻译： MIMO预编码使得能够进行空间复用，功率分配和自适应调制和编码
公开(公告)号：US07702029B2
公开(公告)日：2010-04-20
申请号：US11537902
申请日：2006-10-02
申请人： Jayesh H. Kotecha , Kaibin Huang
发明人： Jayesh H. Kotecha , Kaibin Huang
IPC分类号： H04B7/02
CPC分类号： H04B7/0478 , H04B7/0417 , H04B7/043 , H04B7/0447 , H04B7/0632 , H04B7/0634 , H04B7/0639 , H04L1/0003 , H04L1/0009 , H04L1/0693 , H04W52/08
摘要： In a closed-loop wireless communication system, a codebook-based feedback mechanism is provided to enable non-unitary precoding for multi-stream transmission, where in each stream is optimized with suitable transmission power allocation and AMC. The codebook-based feedback mechanism uses a precoding codebook having a power allocation matrix which is constrained to specify that beamforming always applies full power to a predetermined beam. With this constraint, a one-bit power allocation feedback index may be used to switch between beamforming and spatial multiplexing.
摘要翻译：在闭环无线通信系统中，提供基于码本的反馈机制，以实现用于多流传输的非单位预编码，其中在每个流中以合适的传输功率分配和AMC进行优化。基于码本的反馈机制使用具有功率分配矩阵的预编码码本，该功率分配矩阵被约束以规定波束成形总是对预定波束施加全部功率。利用该约束，可以使用一位功率分配反馈索引来在波束形成和空间复用之间切换。

74. 发明申请

US20090327835A1 Techniques for Reducing Joint Detection Complexity in a Channel-Coded Multiple-Input Multiple-Output Communication System 有权
标题翻译：降低通道编码多输入多输出通信系统联合检测复杂度的技术
公开(公告)号：US20090327835A1
公开(公告)日：2009-12-31
申请号：US12165073
申请日：2008-06-30
申请人： Oghenekome F. Oteri , Leo G. Dehner , Jayesh H. Kotecha , Hoojin Lee
发明人： Oghenekome F. Oteri , Leo G. Dehner , Jayesh H. Kotecha , Hoojin Lee
IPC分类号： H04M13/00 , G06F11/00
CPC分类号： H04J11/0043 , H04L1/0048 , H04L25/0228 , H04L25/0248 , H04L25/03197 , H04L25/03216 , H04L25/03242 , H04L25/03331 , H04L25/067 , H04L2025/03375 , H04L2025/03426 , H04L2025/03643
摘要： A technique for joint detection of channel-coded signals in a multiple-input multiple-output system includes detecting, when a decoded signal associated with a first symbol stream passes a cyclic redundancy check, channel-coded signals in the first symbol stream and a second symbol stream using minimum mean squared error with ordered successive interference cancellation (MMSE-OSIC) based detection. When the decoded signal associated with the first symbol stream fails the cyclic redundancy check, the channel-coded signals in the first and second symbol streams are detected using neighbor search algorithm (NSA) based detection.
摘要翻译：一种用于在多输入多输出系统中联合检测信道编码信号的技术，包括当与第一符号流相关联的解码信号通过循环冗余校验时，检测第一符号流中的信道编码信号和第二符号流中的信道编码信号符号流使用基于有序连续干扰消除（MMSE-OSIC）的检测的最小均方误差。当与第一符号流相关联的解码信号失败循环冗余校验时，使用基于邻近搜索算法（NSA）的检测来检测第一和第二符号流中的信道编码信号。

75. 发明申请

US20090201861A1 Method for Efficient CQI Feedback 有权
标题翻译：高效的CQI反馈方法
公开(公告)号：US20090201861A1
公开(公告)日：2009-08-13
申请号：US12028897
申请日：2008-02-11
申请人： Jayesh H. Kotecha
发明人： Jayesh H. Kotecha
IPC分类号： H04Q7/00
CPC分类号： H04L25/03343 , H04B7/0632 , H04B7/0636 , H04L1/0027 , H04L25/0204 , H04L25/0228 , H04L25/0242 , H04L2025/03426 , H04L2025/03802 , H04W24/10
摘要： In a closed-loop wireless communication system (300), channel-side information—such as CQI information, rank adaptation information or MIMO codebook selection information—is fed back to the transmitter (310) in response to a start message (301) using a configurable or default time period or window by having the receiver (320) automatically terminate feedback upon expiration of the time period/window. The receiver (330) may continue or interrupt the feedback upon receipt of appropriate messaging (e.g., 306) from the transmitter (310).
摘要翻译：在闭环无线通信系统（300）中，响应于开始消息（301）使用诸如CQI信息，秩自适应信息或MIMO码本选择信息的信道侧信息被反馈到发射机（310）通过使接收器（320）在时间段/窗口期满时自动终止反馈，可配置或默认的时间段或窗口。接收器（330）可以在从发送器（310）接收到适当的消息传送（例如306）时继续或中断反馈。

76. 发明申请

US20080165875A1 Multi-user MIMO-SDMA for finite rate feedback systems 有权
标题翻译：用于有限速率反馈系统的多用户MIMO-SDMA
公开(公告)号：US20080165875A1
公开(公告)日：2008-07-10
申请号：US11620203
申请日：2007-01-05
申请人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
发明人： Jayakrishnan C. Mundarath , Jayesh H. Kotecha
IPC分类号： H04L5/12 , H04L27/28
CPC分类号： H04B7/0417 , H04B7/0632 , H04B7/0634 , H04B7/0857 , H04B7/086 , H04L5/14 , H04W88/02 , H04W88/08
摘要： A multi-user MIMO downlink beamforming system with limited feedback (200) is provided to enable preceding for multi-stream transmission, where a channel codeword (ui) and one or more channel quality indicator values (CQIA, CQIB) are computed at the user equipment (201.i) on the basis of maximizing a predetermined SINR performance metric (ρi) which estimates the receive signal-to-noise-ratio (SINR) at the user equipment (201.i). The computed codeword (ui) and CQI values (or differential values related thereto) are quantized and fed back to help the base station (210) which applies a correction to the appropriate CQI value in the course of designing the transmit beamforming vectors w and determining the appropriate modulation and coding level to be used for downlink data transmission.
摘要翻译：提供了一种具有有限反馈（200）的多用户MIMO下行链路波束成形系统（200），以便能够进行多流传输，其中信道码字（u i i i i）和一个或多个信道质量指示符值基于最大化预定的SINR性能度量（R i S i N i），在用户设备（201.i）处计算（A，B，C B）），其估计用户设备（201.i）处的接收信噪比（SINR）。对所计算的码字（u i i i）和CQI值（或与其相关的差分值）进行量化并反馈以帮助基站（210）在基站（210）中对适当的CQI值进行校正设计发送波束成形向量w并确定要用于下行链路数据传输的适当调制和编码电平。

77. 发明申请

US20080076370A1 Methods for optimal collaborative MIMO-SDMA 有权
标题翻译：最优协同MIMO-SDMA的方法
公开(公告)号：US20080076370A1
公开(公告)日：2008-03-27
申请号：US11535702
申请日：2006-09-27
申请人： Jayesh H. Kotecha , Jayakrishnan C. Mundarath
发明人： Jayesh H. Kotecha , Jayakrishnan C. Mundarath
IPC分类号： H04B1/18
CPC分类号： H04B7/0417 , H04B7/043
摘要： A system and method for collaboratively designing optimized beamforming vectors is disclosed for a wireless multiple input, multiple output (MIMO) space division multiple access (SDMA) communication system to optimize an aggregate SNR performance metric across the different users, thereby permitting the flexibility to trade off computational requirements and size of control information exchanged with performance. Using adaptive vector space search methods, the space of all receive beamformers is searched to find the set which maximizes either the sum or product of SNRs of the users.
摘要翻译：公开了一种用于协同设计优化的波束成形向量的系统和方法，用于无线多输入多输出（MIMO）空分多址（SDMA）通信系统，以优化不同用户的聚合SNR性能度量，从而允许交易的灵活性关闭计算要求和与性能交换的控制信息的大小。使用自适应向量空间搜索方法，搜索所有接收波束形成器的空间，以找到最大化用户的SNR的总和或乘积的集合。

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