公开(公告)号：US08521103B2

公开(公告)日：2013-08-27

申请号：US13534492

申请日：2012-06-27

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

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

IPC分类号： H03C7/02 ,  H04B1/02 ,  H04B7/02

CPC分类号： H04W8/005 ,  H04B7/0408

摘要： Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a communication system, based on a signal for a user within a search range and at least one other signal for one other user within the search range. The search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The signal for the user may be selected from the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.

摘要翻译： 用于处理通信系统中的信号的方法和系统的某些方面可以包括基于搜索范围内的用户的信号和搜索范围内的另一个用户的至少一个其他信号来最大化通信系统的系统容量。 可以基于与多个信号中的每个信号相对应的信道增益对多个信号进行排序来生成搜索范围。 可以从对应于大于与搜索范围的剩余部分相对应的信道增益的信道增益的搜索范围中选择用户的信号。

公开(公告)号：US20130003619A1

公开(公告)日：2013-01-03

申请号：US13611957

申请日：2012-09-12

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

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

IPC分类号： H04J3/00

CPC分类号： H04B7/0452 ,  H04B7/0408 ,  H04B7/0413 ,  H04L5/1469

摘要： Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiple-input multiple-output (MIMO) system, based on reducing a search range within which to find a group of signals having maximum channel gain. At least one of: a first signal for a first user and a second signal for a second user may be selected, which are both within the reduced search range, and which provides a maximum system capacity. The first signal for the first user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.

摘要翻译： 用于处理通信系统中的信号的方法和系统的某些方面可以包括：基于减少在其中寻找组的搜索范围来最大化时分双工（TDD）多输入多输出（MIMO）系统的系统容量 的信号具有最大的信道增益。 可以选择以下中的至少一个：可以选择第一用户的第一信号和第二用户的第二信号，这两者都在缩小搜索范围内，并且提供最大的系统容量。 用于第一用户的第一信号可以从对应于比还原搜索范围的剩余部分对应的信道增益大的信道增益的缩小搜索范围中选择。 可以通过基于与多个信号中的每个信号相对应的信道增益对多个信号进行排序来生成缩小搜索范围。

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：US20110199926A1

公开(公告)日：2011-08-18

申请号：US13042554

申请日：2011-03-08

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

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

IPC分类号： H04W72/04 ,  H04J1/00 ,  H04J3/00 ,  H04W24/00

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

摘要： A method for channel selection in a communication system includes receiving a broadcast signal comprising a beam vector, generating a first channel state information message based on the power of the broadcast signal, generating a second channel state information message based on the direction of the broadcast signal with respect to the beam vector, and transmitting a feedback signal comprising at least the first channel state information message and the second channel state information message. The communication system may include a frequency division duplex (FDD) multiuser communication system or a time division duplex (TDD) multiuser communication system. The first channel state information message may include a channel gain with respect to the broadcast signal. The second channel state information message may include a measure of orthogonality between the broadcast signal and the beam vector.

摘要翻译： 一种通信系统中的频道选择方法，包括接收包括波束矢量的广播信号，基于广播信号的功率生成第一信道状态信息消息，基于广播信号的方向生成第二信道状态信息消息 并且发送包括至少第一信道状态信息消息和第二信道状态信息消息的反馈信号。 通信系统可以包括频分双工（FDD）多用户通信系统或时分双工（TDD）多用户通信系统。 第一信道状态信息消息可以包括相对于广播信号的信道增益。 第二信道状态信息消息可以包括广播信号和波束矢量之间的正交性的度量。

公开(公告)号：US20110150116A1

公开(公告)日：2011-06-23

申请号：US13037611

申请日：2011-03-01

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： H04L27/28

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：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：US20100150036A1

公开(公告)日：2010-06-17

申请号：US12633083

申请日：2009-12-08

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

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

IPC分类号： H04W72/04 ,  H04J1/00

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

摘要： A method for communication is disclosed and may include performing, using one or more processors and/or circuits, selecting, from a plurality of signal receiving users in a multiuser communication system, a first signal receiving user having a channel gain that is greater than a channel gain of each corresponding signal receiving user of a remaining portion of the plurality of signal receiving users. A second signal receiving user may be selected from the remaining portion of the plurality of signal receiving users, based on a feedback information comprising orthogonality of a channel direction of the second signal receiving user with respect to a channel direction of the first user. The feedback information may include a channel gain of the second signal receiving user. The communication system may include a frequency division duplex (FDD) multiuser communication system.

摘要翻译： 公开了一种用于通信的方法，并且可以包括使用一个或多个处理器和/或电路从多用户通信系统中的多个信号接收用户中选择第一信号接收用户，其具有大于 每个对应的信号接收用户的多个信号接收用户的剩余部分的信道增益。 可以基于包括第二信号接收用户的信道方向相对于第一用户的信道方向的正交性的反馈信息，从多个信号接收用户的剩余部分中选择第二信号接收用户。 反馈信息可以包括第二信号接收用户的信道增益。 通信系统可以包括频分双工（FDD）多用户通信系统。

公开(公告)号：US20070066230A1

公开(公告)日：2007-03-22

申请号：US11231699

申请日：2005-09-21

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

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

IPC分类号： H04B17/00 ,  H04B7/00

CPC分类号： H04B7/0452 ,  H04B17/382 ,  H04W52/42

摘要： Various aspects of a method and a system for a range reduction scheme for user selection in a multiuser MIMO downlink transmission are presented. Aspects of a system for range reduction may comprise a range reduction processor that determines a plurality of channel measurements corresponding to a plurality of signals. The range reduction processor may compute a plurality of channel capacities based on the channel measurements corresponding to a subset of the plurality of signals having channel gain that is greater than a remaining portion of the plurality of signals. Aspects of a method may comprise determining a plurality of channel measurements corresponding to a plurality of signals, and computing a plurality of channel capacities based on said channel measurements corresponding to a subset of the plurality of signals having a channel gain that is greater than a remaining portion of the plurality of signals.

摘要翻译： 提出了一种用于多用户MIMO下行链路传输中的用户选择的范围缩减方案的方法和系统的各个方面。 用于范围缩小的系统的方面可以包括范围缩小处理器，其确定对应于多个信号的多个信道测量。 范围缩小处理器可以基于与具有大于多个信号的剩余部分的信道增益的多个信号的子集相对应的信道测量来计算多个信道容量。 方法的方面可以包括：确定对应于多个信号的多个信道测量，以及基于与多个信号的子集相对应的所述信道测量来计算多个信道容量，该信道测量具有大于剩余的信道增益的信道增益 部分信号。

公开(公告)号：US20070064632A1

公开(公告)日：2007-03-22

申请号：US11232266

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： H04J11/00 ,  H04J1/16 ,  H04J1/00 ,  H04B7/00 ,  H04J3/22 ,  H04L12/26 ,  H04J3/16

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0626 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04W52/42

摘要： Certain embodiments of the invention may be found in a method and system for an improved user group selection scheme with finite-rate channel state information feedback for frequency division duplex (FDD) multiuser multiple-input-multiple-output (MIMO) downlink transmission. Aspects of the method may include selecting, from a plurality of users in a FDD multiuser communication system, a first user having a channel gain that is greater than a channel gain corresponding to a remaining portion of the plurality of users. A second user may be selected from the remaining portion of the plurality of users, based on a channel gain of the second user and orthogonality of the second user's channel direction with respect to the first user. The selected second user may have a channel gain that is greater than a channel gain corresponding to the remaining portion of the plurality of users.

摘要翻译： 可以在用于频分双工（FDD）多用户多输入多输出（MIMO）下行链路传输的有限速率信道状态信息反馈的改进的用户组选择方案的方法和系统中找到本发明的某些实施例。 方法的方面可以包括从FDD多用户通信系统中的多个用户中选择具有大于与多个用户的剩余部分相对应的信道增益的信道增益的第一用户。 可以基于第二用户的信道增益和第二用户相对于第一用户的信道方向的正交性，从多个用户的剩余部分中选择第二用户。 所选择的第二用户可以具有大于与多个用户的剩余部分相对应的信道增益的信道增益。

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.