公开(公告)号：US20140044215A1

公开(公告)日：2014-02-13

申请号：US13569148

申请日：2012-08-07

申请人： Jayakrishnan C. Mundarath ,  Leo G. Dehner ,  Jayesh H. Kotecha ,  Peter Z. Rashev

发明人： Jayakrishnan C. Mundarath ,  Leo G. Dehner ,  Jayesh H. Kotecha ,  Peter Z. Rashev

IPC分类号： H04L25/49

CPC分类号： H04L27/2624

摘要： A method and apparatus for a radio base station (200) generates a multicarrier communication signal having a reduced crest factor by processing a block of samples (231) with a peak search window (271) to identify and suppress signal peaks exceeding a power threshold value.

摘要翻译： 无线电基站（200）的方法和装置通过用峰值搜索窗口（271）处理采样块（231）来产生具有降低波峰因数的多载波通信信号，以识别和抑制超过功率阈值的信号峰值 。

公开(公告)号：US08625522B2

公开(公告)日：2014-01-07

申请号：US13526419

申请日：2012-06-18

申请人： James W. McCoy ,  Ning Chen ,  Jayesh H. Kotecha

发明人： James W. McCoy ,  Ning Chen ,  Jayesh H. Kotecha

IPC分类号： H04W4/00 ,  H04W72/00 ,  H04J1/00 ,  H04L12/28

CPC分类号： H04L5/0037 ,  H04W72/14

摘要： A technique of operating a wireless communication device includes creating a resource block map by associating respective subscriber station identifications, corresponding to respective subscriber stations, with one or more resource blocks. The respective subscriber station identifications and the resource block map are transmitted, from a serving base station, in one or more control channel symbols.

摘要翻译： 操作无线通信设备的技术包括通过将对应于各个用户站的各个用户站标识与一个或多个资源块相关联来创建资源块映射。 从服务基站在一个或多个控制信道符号中发送相应的用户台标识和资源块映射。

公开(公告)号：US08245092B2

公开(公告)日：2012-08-14

申请号：US12264173

申请日：2008-11-03

申请人： Jayesh H. Kotecha ,  Ian C. Wong ,  Ning Chen

发明人： Jayesh H. Kotecha ,  Ian C. Wong ,  Ning Chen

IPC分类号： H04L1/18

CPC分类号： H04B7/0413 ,  H04L1/1812 ,  H04L1/1896

摘要： In a wireless communication system (200), a compact control signaling scheme is provided for signaling the selected retransmission mode and codeword identifier for a codeword retransmission when one of a plurality of codewords (CW1, CW2) being transmitted over two codeword pipes to a receiver (201.i) fails the transmission and when the base station/transmitter (210) switches from a higher order channel rank (231) to a lower order channel rank (241), either by including one or more additional signaling bits in the control signal (240) to identify the retransmitted codeword, or by re-using existing control signal information in a way that can be recognized by the subscriber station/receiver to identify the retransmitted codeword. With the compact control signal, the receiver (201.i) is able to determine which codeword is being retransmitted and to determine the corresponding time-frequency resource allocation for the retransmitted codeword.

摘要翻译： 在无线通信系统（200）中，当多个码字（CW1，CW2）中的一个码字（CW1，CW2）通过两个码字管道发送到接收机时，提供紧凑控制信令方案用于信令所选择的重传模式和用于码字重传的码字标识符 （201.i）发送失败，并且当基站/发射机（210）从较高阶信道秩（231）切换到较低阶信道秩（241）时，无论是通过在控制中包括一个或多个附加信令比特 信号（240）以识别重传的码字，或者以可由用户站/接收机识别重传的码字的方式重新使用现有的控制信号信息。 利用紧凑控制信号，接收器（201.i）能够确定哪个码字正被重传并且确定重传的码字的对应的时间 - 频率资源分配。

公开(公告)号：US08199846B2

公开(公告)日：2012-06-12

申请号：US12897417

申请日：2010-10-04

申请人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

发明人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

IPC分类号： H04B7/02

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0665 ,  H04L25/03343 ,  H04L2025/03426 ,  H04W48/16

摘要： A multi-user multiple-input multiple-output (MU-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： 提供多用户多输入多输出（MU-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（201.i）的子集，其中空间分离或零 在基站（210）处计算强制发射波束形成器（wi）并用于产生预编码的参考信号（216）。 预编码的参考信号（216）被馈送到用户设备设备（201.i），其将一个或多个假设测试（207.i，208.i）应用于预编码的参考信号以提取预编码矩阵（W） 包括为用户设备设计的特定发射波束形成向量（WUE），并且该提取的信息用于生成接收波束形成器（vi）。

公开(公告)号：US20120114064A1

公开(公告)日：2012-05-10

申请号：US13100738

申请日：2011-05-04

申请人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

发明人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

IPC分类号： H04L27/00

CPC分类号： H04B7/0456 ,  H04B7/0417 ,  H04B7/0421 ,  H04B7/0452 ,  H04B7/0639

摘要： A multi-user MIMO downlink beamforming system with limited feed forward (200) is provided to enable precoding matrix information to be efficiently provided to a subset of user equipment devices (201.i), where zero-forcing transmit beamformers (wi) are computed at the base station (210) and assembled into a precoding matrix (W). The precoding matrix is encoded using a compact reference signal codebook (225, 207.i) for forward link signaling, either by sending bits indicating the index of the transmission matrix used, or by transmitting one or more precoded pilots or reference signals wherein the pilot signals are precoded using vectors uniquely representative of the transmission matrix used which includes candidate reference signal matrices which meet a predetermined condition number requirement, such as a condition number threshold. The precoding matrix information (227) is extracted at the user equipment devices (201.i) using the compact reference signal codebook (207.i) and used by the MMSE receiver (209.i) to generate receive beamformers (vi).

摘要翻译： 提供了具有有限的前馈（200）的多用户MIMO下行链路波束成形系统，以使预编码矩阵信息能够有效地提供给用户设备设备（201.i）的子集，其中计算迫零发射波束形成器（wi） 在基站（210）处并组装成预编码矩阵（W）。 预编码矩阵使用用于前向链路信令的紧凑参考信号码本（225,207.i）进行编码，通过发送指示所使用的传输矩阵的索引的比特，或者通过发送一个或多个预编码的导频或参考信号，其中导频 使用唯一地代表所使用的传输矩阵的矢量来对信号进行预编码，该传输矩阵包括符合预定条件数量要求的候选参考信号矩阵，例如条件数阈值。 使用紧凑参考信号码本（207.i）在用户设备设备（201.i）处提取预编码矩阵信息（227），并由MMSE接收机（209.i）使用以生成接收波束形成器（vi）。

公开(公告)号：US08020075B2

公开(公告)日：2011-09-13

申请号：US11687376

申请日：2007-03-16

申请人： Jayesh H. Kotecha

发明人： Jayesh H. Kotecha

IPC分类号： H03M13/00

CPC分类号： H04B7/0456 ,  H04L1/0029 ,  H04L5/0057 ,  H04L43/00 ,  H04L43/16 ,  H04W24/00 ,  H04W28/06 ,  H04W72/0406 ,  H04W72/0466

摘要： A system and methodology are disclosed for exploiting channel correlation in time and/or frequency to reduce CQI feedback in wireless communications systems. By compressing CQI feedback at the receiver to reduce redundancy in CQI feedback information that results from the channel correlation, the average feedback rate is reduced. In various embodiments, redundancy in time may be removed from the CQI feedback by monitoring variations of the CQI information in time at the receiver so that CQI information for a given CQI reporting instance is communicated to the transmitter only if it differs from the CQI information for the previous CQI reporting instance. Otherwise, no feedback is performed. In other embodiments, CQI feedback is compressed by performing a discrete cosine transform (DCT) on the CQI data. The compressed CQI feedback information is then communicated to the transmitter through the feedback control channel where it is decoded into the original CQI information and used to generate signal processing information for various sub-carriers.

摘要翻译： 公开了一种用于在时间和/或频率上利用信道相关性以减少无线通信系统中的CQI反馈的系统和方法。 通过在接收机处压缩CQI反馈以减少由信道相关产生的CQI反馈信息中的冗余，平均反馈速率降低。 在各种实施例中，可以通过在接收机处及时监视CQI信息的变化来从CQI反馈中消除时间冗余，使得仅当CQI信息与CQI信息不同时才将CQI给定的CQI报告实例传送给发送器 以前的CQI报告实例。 否则，不执行任何反馈。 在其他实施例中，通过对CQI数据执行离散余弦变换（DCT）来压缩CQI反馈。 压缩的CQI反馈信息然后通过反馈控制信道传送到发射机，在该反馈控制信道中，它被解码为原始的CQI信息，并用于生成各种子载波的信号处理信息。

公开(公告)号：US20110019631A1

公开(公告)日：2011-01-27

申请号：US12897417

申请日：2010-10-04

申请人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

发明人： Jayesh H. Kotecha ,  Jayakrishnan C. Mundarath

IPC分类号： H04W4/00

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： 多用户MIMO下行链路波束形成系统（200）被提供以使发射波束成形向量能够有效地提供给用户设备设备（201.i）的子集，其中空间分离或迫零发射波束形成器（wi） 基站（210）并用于产生预编码的参考信号（216）。 预编码的参考信号（216）被馈送到用户设备设备（201.i），其将一个或多个假设测试（207.i，208.i）应用于预编码的参考信号以提取预编码矩阵（W） 包括为用户设备设计的特定发射波束形成向量（wUE），并且该提取的信息用于生成接收波束形成器（vi）。

公开(公告)号：US07813455B2

公开(公告)日：2010-10-12

申请号：US11562557

申请日：2006-11-22

申请人： Jayesh H. Kotecha

发明人： Jayesh H. Kotecha

IPC分类号： H04L27/06

CPC分类号： H04L1/0631 ,  H04L25/0242 ,  H04L25/03006 ,  H04L25/067 ,  H04L2025/03401 ,  H04L2025/03426

摘要： A MIMO wireless communication system and method reduces the number of recursive operations when decoding received data symbols by decoding the data symbols in pairs rather than on a per symbol basis. Decoding in pairs is facilitated by the determination that errors between selected pairs of data symbols are uncorrelated and identically distributed with a determined variance. Additionally, the system and method can order the pairs and provide decoding rules that result in an insignificant loss of performance for a wide range of signal-to-noise ratios (SNRs). Furthermore, the system and method exploit the structure of the error covariance matrix to reduce computational demands.

摘要翻译： MIMO无线通信系统和方法通过对数据符号进行解码来减少对接收到的数据符号进行解码而不是以每个符号为基础的递归操作的数量。 通过确定所选择的数据符号对之间的错误是不相关的并以确定的方差相同地分布来促成成对解码。 此外，该系统和方法可以对对进行排序并提供解码规则，从而导致宽范围的信噪比（SNR）的性能损失不大。 此外，系统和方法利用误差协方差矩阵的结构来减少计算需求。

公开(公告)号：US20100115358A1

公开(公告)日：2010-05-06

申请号：US12264173

申请日：2008-11-03

申请人： Jayesh H. Kotecha ,  Ian C. Wong ,  Ning Chen

发明人： Jayesh H. Kotecha ,  Ian C. Wong ,  Ning Chen

IPC分类号： H04L1/18 ,  G06F11/00

CPC分类号： H04B7/0413 ,  H04L1/1812 ,  H04L1/1896

摘要： In a wireless communication system (200), a compact control signaling scheme is provided for signaling the selected retransmission mode and codeword identifier for a codeword retransmission when one of a plurality of codewords (CW1, CW2) being transmitted over two codeword pipes to a receiver (201.i) fails the transmission and when the base station/transmitter (210) switches from a higher order channel rank (231) to a lower order channel rank (241), either by including one or more additional signaling bits in the control signal (240) to identify the retransmitted codeword, or by re-using existing control signal information in a way that can be recognized by the subscriber station/receiver to identify the retransmitted codeword. With the compact control signal, the receiver (201.i) is able to determine which codeword is being retransmitted and to determine the corresponding time-frequency resource allocation for the retransmitted codeword.

摘要翻译： 在无线通信系统（200）中，当多个码字（CW1，CW2）中的一个码字（CW1，CW2）通过两个码字管道发送到接收机时，提供紧凑控制信令方案用于信令所选择的重传模式和用于码字重传的码字标识符 （201.i）发送失败，并且当基站/发射机（210）从较高阶信道秩（231）切换到较低阶信道秩（241）时，无论是通过在控制中包括一个或多个附加信令比特 信号（240）以识别重传的码字，或者以可由用户站/接收机识别重传的码字的方式重新使用现有的控制信号信息。 利用紧凑控制信号，接收器（201.i）能够确定哪个码字正被重传并且确定重传的码字的对应的时间 - 频率资源分配。

公开(公告)号：US20090046788A1

公开(公告)日：2009-02-19

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： H04L27/28

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。