公开(公告)号：US08300723B2

公开(公告)日：2012-10-30

申请号：US13099721

申请日：2011-05-03

申请人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

发明人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

IPC分类号： H04B7/02

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0658

摘要： A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feedback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feedback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

摘要翻译： 提供了一种用于多用户分集的信道量化的方法和系统。 量化器可以利用基于与有限速率反馈多用户下行链路通信系统的性能度量相对应的目标函数J确定的量化级。 可以基于通过优化算法使目标函数J最大化的结果来获得量化级别。 优化算法可以是可以利用迭代方法来实现的多元优化算法。 量化器可以利用量化级来量化信道状态信息（CSI）以在有限速率反馈多用户系统中实现多用户分集。 性能度量可以基于信噪比（SNR），误码率（BER）和/或系统容量。 量化级别可以用于需要分布式量化来进行最优选择的多用户系统中。

公开(公告)号：US07899421B2

公开(公告)日：2011-03-01

申请号：US11231501

申请日：2005-09-21

申请人： Jun Zheng ,  Chengjin Zhang ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Pieter Roux ,  Pieter Van Rooyen

发明人： Jun Zheng ,  Chengjin Zhang ,  Severine Catreux-Erceg ,  Vinko Erceg ,  Pieter Roux ,  Pieter Van Rooyen

IPC分类号： H04B1/18

CPC分类号： H04B7/0697 ,  H04B7/0452 ,  H04B7/0626

摘要： A method and system for a double search algorithm of user group selection for multiuser MIMO downlink transmission are provided. The use of optimal brute-force user group selection may require high computational expense. A first search operation may be based on a first user having a channel gain greater than that of other users, while a second search operation may be based on a second user having a channel gain greater than that of the remaining users. A maximized system capacity may be determined based on the maximized system capacities determined in the first and second search loop. A receiver pair associated with the maximized system capacity may be selected as the user group. The double search algorithm may reduce the computational complexity while achieving performances that may exceed the TDMA scheme and be similar to that of systems with ideal CSI at the transmitter.

摘要翻译： 提供了一种用于多用户MIMO下行链路传输的用户组选择双重搜索算法的方法和系统。 使用最佳暴力用户组选择可能需要较高的计算费用。 第一搜索操作可以基于具有大于其他用户的信道增益的信道增益的第一用户，而第二搜索操作可以基于具有大于剩余用户的信道增益的信道增益的第二用户。 可以基于在第一和第二搜索循环中确定的最大化的系统容量来确定最大化的系统容量。 可以选择与最大系统容量相关联的接收机对作为用户组。 双重搜索算法可以降低计算复杂度，同时实现可能超过TDMA方案的性能，并且类似于在发射机处具有理想CSI的系统的性能。

公开(公告)号：US08515360B2

公开(公告)日：2013-08-20

申请号：US13437635

申请日：2012-04-02

申请人： Chengjin Zhang ,  Jun Zheng ,  Pieter Van Rooyen

发明人： Chengjin Zhang ,  Jun Zheng ,  Pieter Van Rooyen

IPC分类号： H04B1/00 ,  H04M1/00

CPC分类号： H04B7/0452 ,  H04B7/0626 ,  H04B7/0643 ,  H04L1/0625 ,  H04L1/0693 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

公开(公告)号：US20110206153A1

公开(公告)日：2011-08-25

申请号：US13099721

申请日：2011-05-03

申请人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

发明人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

IPC分类号： H04B7/02

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0658

摘要： A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feedback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feedback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

摘要翻译： 提供了一种用于多用户分集的信道量化的方法和系统。 量化器可以利用基于与有限速率反馈多用户下行链路通信系统的性能度量相对应的目标函数J确定的量化级。 可以基于通过优化算法使目标函数J最大化的结果来获得量化级别。 优化算法可以是可以利用迭代方法来实现的多元优化算法。 量化器可以利用量化级来量化信道状态信息（CSI）以在有限速率反馈多用户系统中实现多用户分集。 性能度量可以基于信噪比（SNR），误码率（BER）和/或系统容量。 量化级别可以用于需要分布式量化来进行最优选择的多用户系统中。

公开(公告)号：US07936808B2

公开(公告)日：2011-05-03

申请号：US11231416

申请日：2005-09-21

申请人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

发明人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

IPC分类号： H04L5/16

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0658

摘要： A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feedback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feedback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

摘要翻译： 提供了一种用于多用户分集的信道量化的方法和系统。 量化器可以利用基于与有限速率反馈多用户下行链路通信系统的性能度量相对应的目标函数J确定的量化级。 可以基于通过优化算法使目标函数J最大化的结果来获得量化级别。 优化算法可以是可以利用迭代方法来实现的多元优化算法。 量化器可以利用量化级来量化信道状态信息（CSI）以在有限速率反馈多用户系统中实现多用户分集。 性能度量可以基于信噪比（SNR），误码率（BER）和/或系统容量。 量化级别可以用于需要分布式量化来进行最优选择的多用户系统中。

公开(公告)号：US20070064780A1

公开(公告)日：2007-03-22

申请号：US11231416

申请日：2005-09-21

申请人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

发明人： Jun Zheng ,  Chengjin Zhang ,  Pieter Van Rooyen

IPC分类号： H04L5/16 ,  H03D1/04

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/06 ,  H04B7/0626 ,  H04B7/0658

摘要： A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feeback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feeback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

摘要翻译： 提供了一种用于多用户分集的信道量化的方法和系统。 量化器可以利用基于与有限速率的多用户下行链路通信系统的性能度量相对应的目标函数J确定的量化级别。 可以基于通过优化算法使目标函数J最大化的结果来获得量化级别。 优化算法可以是可以利用迭代方法来实现的多元优化算法。 量化器可以利用量化级来量化信道状态信息（CSI）以实现有限速率的多用户系统中的多用户分集。 性能度量可以基于信噪比（SNR），误码率（BER）和/或系统容量。 量化级别可以用于需要分布式量化来进行最优选择的多用户系统中。

公开(公告)号：US20130182796A1

公开(公告)日：2013-07-18

申请号：US13785779

申请日：2013-03-05

申请人： Mark Kent ,  Vinko Erceg ,  Uri Landau ,  Pieter Van Rooyen

发明人： Mark Kent ,  Vinko Erceg ,  Uri Landau ,  Pieter Van Rooyen

IPC分类号： H04B7/04

CPC分类号： H04B7/0413 ,  H04B7/0857

摘要： Methods and systems for processing signals in a receiver are disclosed herein and may comprise generating at least one control signal that may be utilized to control a first received signal. A phase of the first received signals may be adjusted via the generated control signal so that the phase of the first received signal may be equivalent to a phase of a second received signal, where the phase of the first signal may be adjusted within a processing path used to process the first received signal. An amplitude of the first received signal may be adjusted via the generated control signal so that the amplitude of the first received signal may be equivalent to an amplitude of a second received signal, where the amplitude of the first signal is adjusted within the processing path used to process the first received signal.

摘要翻译： 用于在接收机中处理信号的方法和系统在此公开，并且可以包括生成可用于控制第一接收信号的至少一个控制信号。 可以经由所生成的控制信号来调整第一接收信号的相位，使得第一接收信号的相位可以等于第二接收信号的相位，其中可以在处理路径内调整第一信号的相位 用于处理第一个接收信号。 可以经由所生成的控制信号来调整第一接收信号的振幅，使得第一接收信号的振幅可以等于第二接收信号的幅度，其中第一信号的振幅在所使用的处理路径内被调整 以处理第一接收信号。

公开(公告)号：US20120314732A1

公开(公告)日：2012-12-13

申请号：US13593111

申请日：2012-08-23

申请人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen

发明人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen

IPC分类号： H04B1/7073

CPC分类号： H04L25/0212 ,  H04B1/7115 ,  H04B1/7117 ,  H04L25/0204

摘要： A receiver receives multipath signals in a W-CDMA system. Channel estimates and timing reference signals are generated utilizing the received multipath signals. Timing correction signals indicating a location of the received multipath signals may be generated and the received multipath signals may be combined based on the computed channel estimates and/or the generated timing reference signals. The multipath signals may be combined as a signal cluster. Circuitry may be provided that computes channel estimates based on at least one of a plurality of received multipath signals, and generates timing reference signals indicating a location of at least one of the plurality of received multipath signals. Circuitry may also be provided that combines at least a portion of the plurality of received multipath signals based on at least a portion of the computed channel estimates and/or the generated timing reference signals.

摘要翻译： 接收机在W-CDMA系统中接收多径信号。 利用所接收的多径信号产生信道估计和定时参考信号。 可以产生指示所接收的多路径信号的位置的定时校正信号，并且可以基于所计算的信道估计和/或所生成的定时参考信号来组合所接收的多路径信号。 多径信号可以被组合为信号簇。 可以提供电路，其基于多个接收的多路径信号中的至少一个来计算信道估计，并且产生指示多个接收的多路径信号中的至少一个的位置的定时参考信号。 还可以提供电路，其基于所计算的信道估计的至少一部分和/或所生成的定时参考信号来组合多个接收的多径信号的至少一部分。

公开(公告)号：US08254306B2

公开(公告)日：2012-08-28

申请号：US11173726

申请日：2005-06-30

申请人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen ,  Pieter Roux

发明人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen ,  Pieter Roux

IPC分类号： H04B17/02 ,  H04B7/02 ,  H04B1/10 ,  H04L1/02 ,  H04L27/08 ,  H04W4/00

CPC分类号： H04B7/0413 ,  H04B7/0697 ,  H04B7/0857

摘要： Certain aspects of the method may comprise generating at least one control signal that may be utilized to control at least a first of a plurality of received spatially multiplexed communication signals. An amplitude and/or phase of the first received spatially multiplexed communication signal may be adjusted via the generated control signal so that the amplitude and/or phase of the first received spatially multiplexed communication signal may be equivalent to an amplitude and/or phase of a second received spatially multiplexed communication signal. The amplitude of the first received spatially multiplexed communication signal is adjusted within the processing path used to process the first received spatially multiplexed communication signal.

摘要翻译： 该方法的某些方面可以包括生成至少一个控制信号，该至少一个控制信号可被用于控制多个接收的空间复用通信信号中的至少第一个。 可以经由所生成的控制信号来调整第一接收的空间多路复用通信信号的振幅和/或相位，使得第一接收空间复用的通信信号的振幅和/或相位可以等于 第二接收的空间复用通信信号。 在用于处理第一个接收到的空间复用的通信信号的处理路径内调整第一个接收的空间多路复用的通信信号的振幅。

公开(公告)号：US20120087434A1

公开(公告)日：2012-04-12

申请号：US13327011

申请日：2011-12-15

申请人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen ,  Pieter Roux

发明人： Mark Kent ,  Vinko Erceg ,  Uri M. Landau ,  Pieter Van Rooyen ,  Pieter Roux

IPC分类号： H04L27/28 ,  H04L1/02

CPC分类号： H04B7/0417 ,  H04B7/0697 ,  H04L1/0656 ,  H04L25/0204 ,  H04L25/0214 ,  H04L25/0244 ,  H04L25/025 ,  H04L25/03019 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03726 ,  H04L2025/03808

摘要： Certain aspects of the method may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas at a base station. A plurality of vectors of baseband combined channel estimates may be generated based on phase rotation of the received plurality of spatially multiplexed communication signals. A plurality of pre-equalization weights may be generated based on the generated plurality of vectors of baseband combined channel estimates. The received plurality of spatially multiplexed communication signals may be modified based on the generated plurality of pre-equalization weights. At least a portion of the generated plurality of pre-equalization weights may be fed back to the base station for modifying subsequently transmitted spatially multiplexed communication signals which are transmitted from at least a portion of the plurality of transmit antennas at the base station.

摘要翻译： 该方法的某些方面可以包括在基站处从多个发射天线接收多个空间复用的通信信号。 可以基于所接收的多个空间复用通信信号的相位旋转来生成基带组合信道估计的多个向量。 可以基于所生成的多个基带组合信道估计向量来生成多个预均衡权重。 可以基于所生成的多个预均衡权重来修改所接收的多个空间复用的通信信号。 所生成的多个预均衡权重中的至少一部分可以反馈给基站，以便修改在基站处从多个发射天线的至少一部分发送的随后发送的空间复用的通信信号。