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公开(公告)号：US20120076032A1
公开(公告)日：2012-03-29
申请号：US13311336
申请日：2011-12-05
IPC分类号： H04W24/00
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 v downlink beamforming system with limited feedback (200) is provided to enable precoding 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v下行链路波束成形系统，用于对多流传输进行预编码，其中在用户处计算信道码字（ui）和一个或多个信道质量指示符值（CQIA，CQIB） 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。
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公开(公告)号：US08102931B2
公开(公告)日：2012-01-24
申请号：US11529311
申请日：2006-09-29
申请人： Taeyoon Kim , Jayesh H. Kotecha
发明人： Taeyoon Kim , Jayesh H. Kotecha
CPC分类号： H04B7/0465 , H04B1/109 , H04B1/123 , H04B7/002 , H04L1/06 , H04L1/0687 , H04L25/0204
摘要： A method is provided for generating precoder data (600), comprising: obtaining transmit power data indicative of a transmit power of a plurality of multiple-input/multiple-output signals (610); obtaining signal quality data, the signal quality data including at least one measure of a quality of the plurality of multiple-input/multiple-output signals (620, 630); obtaining channel data with respect to a wireless channel, the channel data including a measure of respective channel parameters of each of a plurality of channel paths in the wireless channel (620, 630); constraining one or more system performance parameters (640); and determining first and second precoder diagonal values (wA and wB) based on the signal quality data, the transmit power data, the channel data, and the one or more constrained system performance parameters (650).
摘要翻译： 提供了一种用于生成预编码器数据（600）的方法，包括：获得指示多个多输入/多输出信号（610）的发射功率的发射功率数据; 获得信号质量数据，所述信号质量数据包括所述多个多输入/多输出信号（620,630）的质量的至少一个度量; 获得关于无线信道的信道数据，所述信道数据包括所述无线信道（620,630）中的多个信道路径中的每一个的相应信道参数的度量; 约束一个或多个系统性能参数（640）; 以及基于所述信号质量数据，所述发射功率数据，所述信道数据以及所述一个或多个受限系统性能参数来确定第一和第二预编码器对角线值（wA和wB）（650）。
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43.发明授权公开(公告)号：US07933372B2
公开(公告)日：2011-04-26
申请号：US11683630
申请日：2007-03-08
CPC分类号： H04L25/0328 , H04L2025/03426
摘要： A method for processing a plurality of symbol streams is provided. The method includes receiving a first symbol stream, wherein the first symbol stream has a corresponding first number of retransmissions. The method further includes receiving a second symbol stream, wherein the second symbol stream has a corresponding second number of retransmissions. The method further includes selecting the first symbol stream for decoding, if the first number of retransmissions is greater than the second number of retransmissions.
摘要翻译： 提供了一种用于处理多个符号流的方法。 该方法包括接收第一符号流，其中第一符号流具有对应的第一数目的重传。 该方法还包括接收第二符号流，其中第二符号流具有对应的第二数量的重传。 该方法还包括：如果第一次重发次数大于第二次重发次数，则选择用于解码的第一符号流。
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44.发明授权Techniques for reducing precoding overhead in a multiple-input multiple-output wireless communication system 有权用于减少多输入多输出无线通信系统中的预编码开销的技术公开(公告)号：US07929636B2
公开(公告)日：2011-04-19
申请号：US11838029
申请日：2007-08-13
申请人： Jayesh H. Kotecha
发明人： Jayesh H. Kotecha
IPC分类号： H04B15/00
CPC分类号： H04B7/0617 , H04B7/0417 , H04B7/0626 , H04B7/0639 , H04B7/0656 , H04B7/0663
摘要： A technique of operating a wireless communication device in a multiple-input multiple-output wireless communication system includes receiving, at a first wireless communication device, recommended precoder information from a second wireless communication device, which is associated with a recommended precoder. A precoded signal is then formed at the first wireless communication device based on the recommended precoder or an alternate precoder. The first wireless communication device, which is configured to not provide an indication of whether the recommended precoder or the alternate precoder was utilized to form the precoded signal, then transmits the precoded signal.
摘要翻译： 在多输入多输出无线通信系统中操作无线通信设备的技术包括在第一无线通信设备处接收与推荐预编码器相关联的来自第二无线通信设备的推荐预编码器信息。 然后，基于推荐的预编码器或备用预编码器，在第一无线通信设备处形成预编码信号。 被配置为不提供推荐的预编码器或备用预编码器是否被用于形成预编码信号的指示的第一无线通信装置然后发送预编码的信号。
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45.发明申请MIMO Precoding Enabling Spatial Multiplexing, Power Allocation and Adaptive Modulation and Coding 有权MIMO预编码支持空间复用，功率分配和自适应调制和编码公开(公告)号：US20100202553A1
公开(公告)日：2010-08-12
申请号：US12762013
申请日：2010-04-16
申请人： Jayesh H. Kotecha , Kaibin Huang
发明人： Jayesh H. Kotecha , Kaibin Huang
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。
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46.发明授权公开(公告)号：US07602837B2
公开(公告)日：2009-10-13
申请号：US11254392
申请日：2005-10-20
CPC分类号： H04B7/0897 , H04B7/0417 , H04B7/0452 , H04B7/0478 , H04B7/0617 , H04B7/0619 , H04B7/0632 , H04L25/0248
摘要： A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector wi for each subscriber station using the determined combining vector of the subscriber station. The ith combining vector corresponds to a right singular vector corresponding to a maximum singular value of a channel matrix between a base station and the ith subscriber station. Each subscriber station transmits signals using a weight vector vi, which corresponds to a left singular vector corresponding to a maximum singular value of a channel matrix between the ith subscriber station and the base station. The base station uses the weight vector wi to determine the signal transmitted by the ith subscriber station.
摘要翻译： 无线通信系统非协调多输入多输出（MIMO）空分多址（SDMA）系统确定了产生高平均信噪比加噪声比（SINR）的用户站组合和加权向量。 每个用户站独立地向基站发送信息，该基站允许基站使用所确定的订户站的组合向量来确定每个用户站的权重向量w i。 第i个组合向量对应于对应于基站和第i个用户站之间的信道矩阵的最大奇异值的右奇异矢量。 每个用户站使用权重向量vi发送信号，权重向量vi对应于与第i个用户站和基站之间的信道矩阵的最大奇异值相对应的左奇异矢量。 基站使用权重向量wi来确定由第i个用户台发送的信号。
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47.发明申请公开(公告)号：US20090190688A1
公开(公告)日：2009-07-30
申请号：US12419701
申请日：2009-04-07
IPC分类号： H04B7/02
CPC分类号： H04B7/0897 , H04B7/0417 , H04B7/0452 , H04B7/0478 , H04B7/0617 , H04B7/0619 , H04B7/0632 , H04L25/0248
摘要： A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector wi for each subscriber station using the determined combining vector of the subscriber station. The ith combining vector corresponds to a right singular vector corresponding to a maximum singular value of a channel matrix between a base station and the ith subscriber station. Each subscriber station transmits signals using a weight vector vi, which corresponds to a left singular vector corresponding to a maximum singular value of a channel matrix between the ith subscriber station and the base station. The base station uses the weight vector wi to determine the signal transmitted by the ith subscriber station.
摘要翻译： 无线通信系统非协调多输入多输出（MIMO）空分多址（SDMA）系统确定了产生高平均信噪比加噪声比（SINR）的用户站组合和加权向量。 每个用户站独立地向基站发送信息，该基站允许基站使用所确定的订户站的组合向量来确定每个用户站的权重向量w i。 第i个组合向量对应于对应于基站和第i个用户站之间的信道矩阵的最大奇异值的右奇异矢量。 每个用户站使用权重向量vi发送信号，该权重向量对应于对应于第i个用户站和基站之间的信道矩阵的最大奇异值的左奇异矢量。 基站使用权重向量wi来确定由第i个用户台发送的信号。
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48.发明申请Generalized reference signaling scheme for MU-MIMO using arbitrarily precoded reference signals 有权用于MU-MIMO的通用参考信令方案使用任意预编码的参考信号公开(公告)号：US20080225960A1
公开(公告)日：2008-09-18
申请号：US11687508
申请日：2007-03-16
IPC分类号： H04L27/00
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0665 , H04L25/03343 , H04L2025/03426 , H04W48/16
摘要： A multi-user MIMO downlink beamforming system (200) is provided to enable transmit beamforming vectors to be efficiently provided to a subset of user equipment devices (201.i), where spatial separation or zero-forcing transmit beamformers (wi) are computed at the base station (210) and used to generate precoded reference signals (216). The precoded reference signals (216) are fed forward to the user equipment devices (201.i) which apply one or more hypothesis tests (207.i, 208.i) to the precoded reference signals to extract the precoding matrix (W), including the specific transmit beamforming vector (wUE) designed for the user equipment, and this extracted information is used to generate receive beamformers (vi).
摘要翻译： 提供多用户MIMO下行链路波束形成系统（200）以使发送波束成形向量能够有效地提供给用户设备设备（201i）的子集，其中空间分离或迫零发射波束形成器（w i 在基站（210）计算并用于产生预编码的参考信号（216）。 将预编码的参考信号（216）向前馈送到对预编码的参考信号应用一个或多个假设检验（207i，208i）的用户设备设备（201i），以提取预编码矩阵（W） 包括为用户设备设计的特定发射波束成形向量（w UE UE），并且该提取的信息用于生成接收波束形成器（v i i i i）。
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49.发明申请Feedback reduction for MIMO precoded system by exploiting channel correlation 有权通过利用信道相关性对MIMO预编码系统进行反馈减少公开(公告)号：US20080080459A1
公开(公告)日：2008-04-03
申请号：US11537948
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： H04B7/216
CPC分类号： H04B7/0417 , H04B7/0636 , H04B7/0639 , H04B7/0647 , H04L1/0029 , H04L5/0044 , H04L5/0053 , H04L25/03343 , H04L2025/03414 , H04L2025/03802
摘要： In a closed-loop wireless communication system, a codebook-based precoding feedback compression mechanism is provided to remove redundancy from the precoding feedback that is caused by channel correlation in time and frequency. Redundancy due to temporal correlation of the transmission channel is removed by sending precoding feedback only if there is a change in the precoder state for the channel to the receiver. Redundancy due to frequency correlation is removed by run length encoding the precoding feedback, thereby compressing the precoding feedback prior in the frequency domain. By compressing the precoding feedback, the average rate of precoder feedback is reduced.
摘要翻译： 在闭环无线通信系统中，提供基于码本的预编码反馈压缩机制，以从时间和频率上的信道相关性引起的预编码反馈消除冗余。 通过发送预编码反馈来消除由于传输信道的时间相关性引起的冗余，只有当信道对接收机的预编码器状态发生改变时才会消除。 通过编码预编码反馈的游程长度来消除由于频率相关的冗余，从而在频域之前压缩预编码反馈。 通过压缩预编码反馈，减少了预编码器反馈的平均速率。
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公开(公告)号：US20080080449A1
公开(公告)日：2008-04-03
申请号：US11536280
申请日：2006-09-28
申请人： Kaibin Huang , Jayesh H. Kotecha
发明人： Kaibin Huang , Jayesh H. Kotecha
IPC分类号： H04B7/216
CPC分类号： H04B7/0417 , H04B7/0634 , H04B7/0639 , H04B7/0663 , H04L1/0025 , H04L1/0029
摘要： In a closed-loop wireless communication system, a codebook-based feedback mechanism is provided where each codeword indicates a particular profile to be used to provide a target performance measure (e.g., bit error rate or spectral efficiency) for the transmission channel. This may be accomplished by using a multi-stage quantization process to construct the codewords as a plurality of transmission parameters specifying a MIMO transmission scheme, precoding vector or matrix, power allocation in space/time/frequency, modulation and channel code.
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，其中每个码字指示要用于为传输信道提供目标性能测量（例如，误码率或频谱效率）的特定简档。 这可以通过使用多级量化处理来构造码字来构造为指定MIMO传输方案，预编码向量或矩阵，空间/时间/频率，调制和信道码中的功率分配的多个传输参数。
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