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公开(公告)号：US20120082259A1
公开(公告)日：2012-04-05
申请号：US13252650
申请日：2011-10-04
申请人： Guosen Yue , Narayan Prasad , Meilong Jiang , Sampath Rangarajan
发明人： Guosen Yue , Narayan Prasad , Meilong Jiang , Sampath Rangarajan
CPC分类号： H04B7/0456 , H04L1/0618 , H04L1/1896 , H04L25/03343 , H04L2025/03426
摘要： A method includes obtaining a precoder for retransmission of one codeword responsive to a known precoding matrix of a certain rank and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank', forming an approximate channel covariance matrix; stimating an a minimum mean square error receiver signal-to-noise-interference-ratio for each layer to be retransmitted responsive to the prior forming; and finding a precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ.
摘要翻译： 一种方法包括响应于某一秩的已知预编码矩阵和在原始传输中使用的调制和编码方案分配以及形成近似信道协方差矩阵的期望重传等级来获得用于重传一个码字的预编码器; 响应于先前的形成，针对要重传的每个层激发最小均方误差接收机的信噪比干扰比; 以及从上一个码本中找到一个预编码矩阵，该预编码矩阵使上行链路多输入多输出MIMO混合自动重复请求HARQ中的重传的预编码选择最大化。
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82.发明申请Method and Systems for Conveying Scheduling Information of Overlapping Co-Scheduled Users in an OFDMA-MU-MIMO System 有权用于在OFDMA-MU-MIMO系统中传送重叠共同调度用户的调度信息的方法和系统公开(公告)号：US20120057558A1
公开(公告)日：2012-03-08
申请号：US13296394
申请日：2011-11-15
申请人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
发明人： Narayan Prasad , Mohammad Ali Khojastepour , Meilong Jiang , Xiaodong Wang , Sampath Rangarajan
IPC分类号： H04W72/04
CPC分类号： H04W72/04 , H04B7/0452 , H04B7/0639 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L5/0007 , H04L25/0208 , H04W8/26 , H04W28/04 , H04W52/346 , H04W72/0446 , H04W72/12 , H04W72/1231 , H04W72/1289
摘要： Methods and systems for conveying or transmitting to any given user in an OFDMA-MU-MIMO system scheduling information of other co-scheduled users to permit the user to perform error-correction on received data and/or interference reduction on its received signals. The scheduling information can include resource block assignment, modulation constellations employed, coding rates employed, power levels utilized and precoder matrix indices used. Further, the scheduling information can be conveyed in part through dedicated reference symbol layers or pilot streams. Moreover, a base station may transmit a preliminary estimate of the total number of users the base station expects to schedule, or an upper-bound on the total number of users, to the MU-MIMO users to permit the MU-MIMO users to determine preferred precoder matrix indices and indications of channel quality indices.
摘要翻译： 在OFDMA-MU-MIMO系统中向任何给定用户传送或发送给其他协调调度用户的信息的方法和系统，以允许用户对接收到的数据执行纠错和/或对其接收信号的干扰减少。 调度信息可以包括资源块分配，采用的调制星座，采用的编码率，使用的功率电平和使用的预编码器矩阵索引。 此外，可以部分地通过专用参考符号层或导频流来传送调度信息。 此外，基站可以向MU-MIMO用户发送基站期望调度的用户总数或总用户数的上限的初步估计，以允许MU-MIMO用户确定 优选的预编码器矩阵索引和信道质量指标的指示。
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公开(公告)号：US20120039411A1
公开(公告)日：2012-02-16
申请号：US13115162
申请日：2011-05-25
IPC分类号： H04B7/02
CPC分类号： H04B7/0452 , H04B7/0632 , H04B7/0639 , H04B7/0665 , H04L5/0023 , H04L5/0094
摘要： Systems and methods for conveying wireless transmission allocation information are disclosed. In accordance with one method, an index indicating selected data stream parameters is received. In addition, an indication of a number of transmit antennas at a transmitter from which the data stream is transmitted is also received. Further, the selected parameters are determined from the index based on the number of transmit antennas at the transmitter. Moreover, data signals are received and processed with a processor in accordance with the selected data stream parameters.
摘要翻译： 公开了传送无线传输分配信息的系统和方法。 根据一种方法，接收指示所选数据流参数的索引。 此外，还接收在发送数据流的发送器处的多个发送天线的指示。 此外，基于发射机处的发射天线的数量，从索引确定所选择的参数。 此外，根据所选择的数据流参数，处理器接收并处理数据信号。
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84.发明授权Group MMSE-DFD with rate (SINR) feedback and without pre-determined decoding order for reception on a cellular downlink 有权具有速率（SINR）反馈的组MMSE-DFD，并且没有用于蜂窝下行链路上的接收的预定解码顺序公开(公告)号：US08098631B2
公开(公告)日：2012-01-17
申请号：US12047555
申请日：2008-03-13
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04W4/00
CPC分类号： H04W88/06 , H04W4/06 , H04W24/00 , H04W84/042
摘要： The invention is a method directed to group MMSE-DFD with rate (SINR) feedback and without pre-determined decoding order for reception on a cellular downlink. The method includes initializing channel matrix estimates and inner codes of all co-channel transmitter sources in a wireless network. Each channel matrix estimate is converted into an effective channel matrix responsive to the inner code of the corresponding transmitter source; The channel estimates or the inner codes or the modulation and coding schemes are not known for some of the transmitter sources whose transmitted signals are consequently treated as interference and deemed un-decodable.
摘要翻译： 本发明是一种针对具有速率（SINR）反馈的组MMSE-DFD并且在蜂窝下行链路上没有用于接收的预定解码顺序的方法。 该方法包括在无线网络中初始化信道矩阵估计和所有同信道发射机源的内部码。 响应于相应的发射机源的内部码，每个信道矩阵估计被转换成有效的信道矩阵; 信道估计或内码或调制和编码方案对于其发射信号因此被视为干扰并被认为是不可解码的一些发射机源是未知的。
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公开(公告)号：US20110274207A1
公开(公告)日：2011-11-10
申请号：US13111521
申请日：2011-05-19
IPC分类号： H04L25/49
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0632 , H04B7/0639
摘要： A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
摘要翻译： 相应地确定其中估计下行链路信道并由MRBF发射机使用的最佳预编码矩阵的多级波束成形（MRBF）方案。 从具有递归结构的矩阵码本中选择最佳预编码矩阵，其允许有效计算最佳预编码矩阵和对应的信号与干扰和噪声比（SINR）。 该码本还具有小的存储空间。 由于计算效率和适度的存储器要求，可以在用户设备（UE）进行最佳预编码确定，并通过有限的上行链路信道传送到发射基站，以通过下行链路信道实现。
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公开(公告)号：US20110274203A1
公开(公告)日：2011-11-10
申请号：US13111594
申请日：2011-05-19
IPC分类号： H04L27/00
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0632 , H04B7/0639
摘要： A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
摘要翻译： 相应地确定其中估计下行链路信道并由MRBF发射机使用的最佳预编码矩阵的多级波束成形（MRBF）方案。 从具有递归结构的矩阵码本中选择最佳预编码矩阵，其允许有效计算最佳预编码矩阵和对应的信号与干扰和噪声比（SINR）。 该码本还具有小的存储空间。 由于计算效率和适度的存储器要求，可以在用户设备（UE）进行最佳预编码确定，并通过有限的上行链路信道传送到发射基站，以通过下行链路信道实现。
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公开(公告)号：US20110255632A1
公开(公告)日：2011-10-20
申请号：US13088928
申请日：2011-04-18
IPC分类号： H04L27/00
CPC分类号： H04B7/0452 , H04J11/0046 , H04L5/0023 , H04L25/03331 , H04L27/0008 , H04L27/0012 , H04L27/34 , H04W72/042 , H04W72/12
摘要： Systems and methods for conveying and determining modulations schemes employed by co-scheduled users are disclosed. In addition, methods and systems for designing signaling schemes that convey such information are also disclosed. In accordance with one method, an index is received and a table of indices in which the received index denotes a plurality of different sets of modulation schemes is referenced. Further, one or more modulation schemes of at least one co-scheduled user is determined based on the referencing. In addition, data signals are received and are processed by utilizing the one or more modulation schemes.
摘要翻译： 公开了用于传送和确定共同调度用户采用的调制方案的系统和方法。 此外，还公开了用于设计传达这种信息的信令方案的方法和系统。 根据一种方法，接收索引，并且参考其中接收到的索引表示多个不同的调制方案组的索引表。 此外，基于参考来确定至少一个共同调度用户的一个或多个调制方案。 此外，接收数据信号并通过利用一个或多个调制方案来处理数据信号。
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88.发明授权公开(公告)号：US08023581B2
公开(公告)日：2011-09-20
申请号：US11857269
申请日：2007-09-18
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
CPC分类号： H04L1/0054 , H04L25/03203 , H04L25/03286 , H04L25/03305
摘要： A method includes the steps of i) listing out all possibilities for a first symbol of a two stream signal; ii) determining a second symbol of the two stream signal for each of the first symbol listed out, iii) evaluating a metric for each of the first symbol and second symbol pair, iv) listing out all possibilities for second symbol, v) determining a first symbol for each choice of the second symbol listed out, vi) evaluating a metric for each of the second symbol and first symbol pair, vii) determining an exact maximum log likelihood ratio for all bits using the metrics, and viii) decoding codeword(s) in the two stream signal using the determined exact maximum log likelihood ratio for all bits.
摘要翻译： 一种方法包括以下步骤：i）列出两个流信号的第一符号的所有可能性; ii）确定所列出的第一符号中的每一个的两个流信号的第二符号，iii）评估第一符号和第二符号对中的每一个的度量，iv）列出第二符号的所有可能性，v）确定 vi）对所述第二符号和第一符号对中的每个符号对的每一个的度量进行评估，vii）使用所述度量确定所有比特的精确最大对数似然比，以及viii）解码码字（ s）在两个流信号中，使用所确定的所有比特的精确最大对数似然比。
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89.发明申请SYSTEMS AND METHODS FOR PRIORITIZING BEAMS TO ENABLE EFFICIENT DETERMINATION OF SUITABLE COMMUNICATION LINKS 有权优化网络的系统和方法，以便有效地确定适用的通信链路公开(公告)号：US20110110453A1
公开(公告)日：2011-05-12
申请号：US12941575
申请日：2010-11-08
CPC分类号： H04B7/0408 , H04B1/1027 , H04B7/063 , H04B7/0695 , H04B7/088
摘要： Methods and systems for enabling the rectification of deteriorated channel conditions on a communication link are described. In particular, the methods and systems can employ mechanisms that prioritize beams in accordance with signal quality measures, direction of departures of transmission beams and/or direction of arrivals of reception beams to address variable channel conditions.
摘要翻译： 描述了能够在通信链路上整流恶化的信道条件的方法和系统。 特别地，方法和系统可以采用根据信号质量测量，发射波束的偏离方向和/或接收波束的到达方向对波束进行优先化的机制，以解决可变信道条件。
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90.发明申请公开(公告)号：US20110059705A1
公开(公告)日：2011-03-10
申请号：US12878258
申请日：2010-09-09
申请人： Ali Tajer , Narayan Prasad , Xiaodong Wang , Sampath Rangrajan
发明人： Ali Tajer , Narayan Prasad , Xiaodong Wang , Sampath Rangrajan
IPC分类号： H04B1/04
CPC分类号： H04B7/0626 , H04B7/022
摘要： Methods and systems for optimizing the utilities of receiver devices in a wireless communication network are disclosed. Precoder design formulations that maximize a minimum worst-case rate or a worst-case sum rate are described for both full base station cooperation and limited base station cooperation scenarios. In addition, optimal equalizers are also selected to optimize the worst-case sum rate.
摘要翻译： 公开了用于优化无线通信网络中的接收机设备的实用性的方法和系统。 对于完整的基站合作和有限的基站合作情况，都会描述使最小最坏情况速率或最差情况下的总速率最大化的预编码器设计公式。 此外，还选择最佳均衡器来优化最差情况下的和速率。
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