公开(公告)号：US20120243468A1

公开(公告)日：2012-09-27

申请号：US13070414

申请日：2011-03-23

申请人： Dennis Hui ,  Jung-fu Cheng ,  Jiann-Ching Guey ,  Ali S. Khayrallah ,  Shing-Wa Wong

发明人： Dennis Hui ,  Jung-fu Cheng ,  Jiann-Ching Guey ,  Ali S. Khayrallah ,  Shing-Wa Wong

IPC分类号： H04W4/00

CPC分类号： H04B7/024 ,  H03M7/3068 ,  H03M7/3082

摘要： A compression/decompression method for backhaul communication of a complex-valued radio signal between base stations and the network processing unit, such as a Central Processor of a Coordinated MultiPoint (CoMP) system, significantly reduces backhaul bandwidth. The spatial and temporal correlations of the wireless IQ signal are exploited in order to remove redundancy and substantially reduce signal bandwidth. Feature component signals of significance are extracted through linear transformation to form the radio signal, and are individually quantized, possibly at different bit rates in accordance with their relative importance. The transformation can either be pre-determined or computed in real-time based on the spatial and temporal statistics of the radio signal. In the latter case, the transformation matrix or matrices are also sent over the backhaul in order to allow the radio signal to be reconstructed at the receiving end. Different methods of generating the transformation matrices are proposed.

摘要翻译： 用于基站和诸如协调多点（CoMP）系统的中央处理器的网络处理单元之间的复数无线电信号的回程通信的压缩/解压缩方法显着地减少了回程带宽。 利用无线IQ信号的空间和时间相关性来消除冗余并显着降低信号带宽。 通过线性变换提取有意义的特征分量信号以形成无线电信号，并且可以根据其相对重要性以不同的比特率单独量化。 可以基于无线电信号的空间和时间统计来实时地进行转换或者实时地进行转换。 在后一种情况下，转换矩阵或矩阵也通过回程发送，以允许在接收端重建无线电信号。 提出了生成转换矩阵的不同方法。

公开(公告)号：US20070259681A1

公开(公告)日：2007-11-08

申请号：US11741083

申请日：2007-04-27

申请人： Jung-fu Cheng ,  Anders Furuskar ,  Dennis Hui ,  Muhammad Ali Kazmi ,  Arne Simonssson ,  Per Skillermark

发明人： Jung-fu Cheng ,  Anders Furuskar ,  Dennis Hui ,  Muhammad Ali Kazmi ,  Arne Simonssson ,  Per Skillermark

IPC分类号： H04B7/00

CPC分类号： H04L27/2608 ,  H04L5/006 ,  H04L5/0062 ,  H04L27/364 ,  H04W72/1231

摘要： According to methods and apparatus taught herein, user equipments (UEs) in a wireless communication network are scheduled based on determining received signal power densities for a plurality of UEs to be scheduled, allocating UEs to scheduling intervals based on a sorting of their received signal power densities, and assigning UEs in the same scheduling interval to mirror frequency bands within an available frequency spectrum according to the sorting. For example, UEs to be scheduled are assigned to a given scheduling interval in rank order of their received signal power densities until the scheduling interval is fully allocated. Remaining UEs are assigned in rank order to one or more other scheduling intervals, and the process may be repeated or otherwise carried out on an ongoing basis. Such an allocation scheme tends to minimize both adjacent frequency and mirror frequency interferences between UEs scheduled in the same interval.

摘要翻译： 根据本文教导的方法和装置，基于确定要调度的多个UE的接收信号功率密度来调度无线通信网络中的用户设备（UE），基于对其接收信号功率的分类，将UE分配到调度间隔 并且按照相同的调度间隔分配UE以根据排序来反映可用频谱内的频带。 例如，要调度的UE被分配给其接收信号功率密度的等级的给定调度间隔，直到调度间隔被完全分配为止。 剩余的UE被按照等级顺序分配给一个或多个其他调度间隔，并且该过程可以在持续的基础上重复或以其他方式执行。 这种分配方案倾向于最小化在相同间隔中调度的UE之间的相邻频率和镜像频率干扰。

公开(公告)号：US08176376B2

公开(公告)日：2012-05-08

申请号：US11905173

申请日：2007-09-27

申请人： Jung-fu Cheng ,  Bo Göransson ,  Stefan Parkvall ,  Yi-Pin Eric Wang

发明人： Jung-fu Cheng ,  Bo Göransson ,  Stefan Parkvall ,  Yi-Pin Eric Wang

IPC分类号： H04L1/18 ,  H03M13/00

CPC分类号： H04L1/1607 ,  H04L1/004 ,  H04L1/0073 ,  H04L1/1812 ,  H04L2001/125

摘要： Error protection based on a nonlinear code set may be used in a multiple input multiple output (MIMO) radio communications system. A decoder decodes received MIMO data streams and generates an automatic repeat request (ARQ) message for data units received for the MIMO data streams for each transmission time interval. An encoder codes the ARQ message using a code word from a nonlinear code set. At the data transmitter, which transmits one or more data units in transmission time intervals from two or more MIMO data streams, the ARQ message associated with the transmitted data units is decoded using a code word from the nonlinear code set.

摘要翻译： 可以在多输入多输出（MIMO）无线电通信系统中使用基于非线性码集的错误保护。 解码器解码所接收的MIMO数据流，并为每个传输时间间隔为MIMO数据流接收的数据单元生成自动重复请求（ARQ）消息。 编码器使用来自非线性码集的码字对ARQ消息进行编码。 在从两个或多个MIMO数据流以传输时间间隔发送一个或多个数据单元的数据发射机处，使用来自非线性码集的码字来解码与发送的数据单元相关联的ARQ消息。

公开(公告)号：US20110105046A1

公开(公告)日：2011-05-05

申请号：US13005195

申请日：2011-01-12

申请人： Karl James Molnar ,  Jung-fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

发明人： Karl James Molnar ,  Jung-fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

IPC分类号： H04B17/00

CPC分类号： H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

摘要： A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

摘要翻译： 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

公开(公告)号：US20080115034A1

公开(公告)日：2008-05-15

申请号：US11936242

申请日：2007-11-07

申请人： Jung-fu Cheng

发明人： Jung-fu Cheng

IPC分类号： G06F11/10

CPC分类号： H03M13/2775 ,  H03M13/2739 ,  H03M13/2957 ,  H03M13/6525

摘要： A quadratic permutation polynomial (QPP) interleaver is described for turbo coding and decoding. The QPP interleaver has the form: Π(n)=f1n+f2n2 mod K, where the QPP coefficients f1 and f2. are designed to provide good error performance for a given block length K.

摘要翻译： 描述了用于turbo编码和解码的二次置换多项式（QPP）交织器。 QPP交织器具有以下形式：<？in-line-formula description =“In-line Formulas”end =“lead”？> Pi（n）= f <1> n + f ＆lt;＆lt; 2＆gt; mod K，<？in-line-formula description =“In-line Formulas”end =“tail”？>其中QPP系数f 1 和f＆gt; 2 。 被设计为为给定的块长度K提供良好的误差性能。

公开(公告)号：US08239711B2

公开(公告)日：2012-08-07

申请号：US11936242

申请日：2007-11-07

申请人： Jung-fu Cheng

发明人： Jung-fu Cheng

IPC分类号： H03M13/27 ,  H03M13/29

CPC分类号： H03M13/2775 ,  H03M13/2739 ,  H03M13/2957 ,  H03M13/6525

摘要： A quadratic permutation polynomial (QPP) interleaver is described for turbo coding and decoding. The QPP interleaver has the form: Π(n)=f1n+f2n2 mod K, where the QPP coefficients f1 and f2. are designed to provide good error performance for a given block length K.

摘要翻译： 描述了用于turbo编码和解码的二次置换多项式（QPP）交织器。 QPP交织器具有以下形式：＆Pgr;（n）= f1n + f2n2 mod K，其中QPP系数f1和f2被设计为为给定的块长度K提供良好的误差性能。

公开(公告)号：US20070008943A1

公开(公告)日：2007-01-11

申请号：US11138724

申请日：2005-05-26

申请人： Stephen Grant ,  Jung-fu Cheng ,  Karl Molnar ,  Yi-Pin Wang ,  Rajaram Ramesh

发明人： Stephen Grant ,  Jung-fu Cheng ,  Karl Molnar ,  Yi-Pin Wang ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04L1/0026 ,  H04B7/061 ,  H04B7/0678 ,  H04B7/0691 ,  H04B7/0697 ,  H04B17/309 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0033 ,  H04L1/06 ,  H04L1/20 ,  H04L5/0057 ,  H04W24/10

摘要： A wireless communication receiver receiving a multiplexed signal comprising two or more signal streams calculates a received signal quality for the multiplexed signal as a function of stream-specific received signal qualities, determines one or more loss parameters indicative of variations in the stream-specific received signal qualities, and generates quality feedback based on such information. In turn, a transmitter controls the selection of one or more transmission parameters of the multiplexed signal based on the quality feedback, such that its transmit link adaptations account for the losses in received signal quality at the receiver arising from the variations in the stream-specific received signal qualities. The quality feedback may include calculated loss values, or parameter/penalties that permit loss calculation, and the method applies to both code multiplexing and spatial multiplexing.

摘要翻译： 接收包括两个或多个信号流的多路复用信号的无线通信接收机根据流专用接收信号质量计算多路复用信号的接收信号质量，确定一个或多个指示流特定接收信号变化的丢失参数 质量，并根据这些信息产生质量反馈。 反过来，发射机基于质量反馈来控制对多路复用信号的一个或多个传输参数的选择，使得其发射链路适应性考虑到接收机的接收信号质量中由于流特定的变化引起的损耗 收到信号质量。 质量反馈可以包括计算的损失值或允许损耗计算的参数/惩罚，并且该方法适用于码复用和空间复用两者。

公开(公告)号：US20120295558A1

公开(公告)日：2012-11-22

申请号：US13319556

申请日：2011-09-09

申请人： Meng Wang ,  Shaohua Li ,  Robert Baldemair ,  Jung-fu Cheng ,  Farshid Ghasemzadeh ,  Magnus Larsson ,  Johan Sköld

发明人： Meng Wang ,  Shaohua Li ,  Robert Baldemair ,  Jung-fu Cheng ,  Farshid Ghasemzadeh ,  Magnus Larsson ,  Johan Sköld

IPC分类号： H04B15/00 ,  H04B1/40

CPC分类号： H04B1/109 ,  H04B1/123 ,  H04B1/525

摘要： A wireless communication node (10) dynamically estimates passive intermodulation (PIM) interference coupled into the node's receive path from the transmission of a composite signal through the node's transmit path. The node (10) then cancels the estimated PIM interference in the receive path. In some embodiments, the node dynamically estimates the PIM interference as a function of the composite signal that models PIM interference generation and coupling in the node (10) according to one or more coefficients (30). The coefficients (30) may be determined by transmitting a test signal (34) during a test stage, when the node (10) is not scheduled to receive any signal. Later, when the composite signal (18) is transmitted, the node (10) uses the coefficients (10) to dynamically estimate and cancel the resulting PIM interference.

摘要翻译： 无线通信节点（10）通过节点的传输路径动态地估计耦合到节点的接收路径中的无源互调（PIM）干扰从复合信号的传输。 节点（10）然后消除接收路径中的估计PIM干扰。 在一些实施例中，节点根据一个或多个系数（30）动态地估计作为对节点（10）中的PIM干扰生成和耦合的复合信号的函数的PIM干扰。 当节点（10）未被调度为接收任何信号时，可以在测试阶段期间发送测试信号（34）来确定系数（30）。 之后，当复合信号（18）被发送时，节点（10）使用系数（10）来动态估计并消除所产生的PIM干扰。

公开(公告)号：US07899015B2

公开(公告)日：2011-03-01

申请号：US11681302

申请日：2007-03-02

申请人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

发明人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04W72/0406 ,  H04B2201/709727 ,  H04W4/18 ,  H04W48/08 ,  H04W72/082

摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.

摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。

公开(公告)号：US20080212539A1

公开(公告)日：2008-09-04

申请号：US11681302

申请日：2007-03-02

申请人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

发明人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04W72/0406 ,  H04B2201/709727 ,  H04W4/18 ,  H04W48/08 ,  H04W72/082

摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.

摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。