公开(公告)号：US07945838B2

公开(公告)日：2011-05-17

申请号：US11744357

申请日：2007-05-04

申请人： Yuming Zhu ,  Yanni Chen ,  Dale E. Hocevar ,  Manish Goel

发明人： Yuming Zhu ,  Yanni Chen ,  Dale E. Hocevar ,  Manish Goel

IPC分类号： H03M13/00

CPC分类号： H03M13/1111

摘要： A method and systems for reducing the complexity of a parity checker are described herein. In at least some preferred embodiments, a parity-check decoder includes column store units and one or more alignment units, which are coupled to the column store units. The column store units outnumber the alignments units.

摘要翻译： 本文描述了用于降低奇偶校验器的复杂度的方法和系统。 在至少一些优选实施例中，奇偶校验解码器包括列存储单元和耦合到列存储单元的一个或多个对准单元。 列存储单位超出排列单位。

公开(公告)号：US07889807B2

公开(公告)日：2011-02-15

申请号：US11756408

申请日：2007-05-31

申请人： Hun-Seok Kim ,  Seok-Jun Lee ,  Manish Goel

发明人： Hun-Seok Kim ,  Seok-Jun Lee ,  Manish Goel

IPC分类号： H04B7/02

CPC分类号： G06F17/505 ,  H04L1/0045 ,  H04L25/03203 ,  H04L2025/03426

摘要： In some embodiments, a device includes a multiple-input multiple-output (“MIMO”) decoder module coupled to a first log-likelihood-ratio (“LLR”) computing unit. The decoder module includes at least one processing unit and at least one sorting unit. The decoder module preferably uses a K-best breadth-first search method to decode data from MIMO sources. In some embodiments, a method includes receiving data representing a vector of receive signal samples detected by multiple receive transceivers. The method further includes performing a K-best breadth-first search on the data to obtain an estimated constellation point. The method further includes providing a user data stream based at least in part on the estimated constellation point.

摘要翻译： 在一些实施例中，设备包括耦合到第一对数似然比（“LLR”）计算单元的多输入多输出（“MIMO”）解码器模块。 解码器模块包括至少一个处理单元和至少一个分类单元。 解码器模块优选地使用K最佳宽度优先搜索方法来解码来自MIMO源的数据。 在一些实施例中，一种方法包括接收表示由多个接收收发器检测到的接收信号样本的向量的数据。 该方法还包括对数据执行K最佳宽度优先搜索以获得估计的星座点。 该方法还包括至少部分地基于估计的星座点提供用户数据流。

公开(公告)号：US07724832B2

公开(公告)日：2010-05-25

申请号：US10857417

申请日：2004-05-27

申请人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Michael Polley ,  Manish Goel ,  Muhammad Ikram

发明人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Michael Polley ,  Manish Goel ,  Muhammad Ikram

IPC分类号： H04K1/10

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/067

摘要： In MIMO wireless communications employing LMMSE receiver, the symbols transmitted through a transmit antenna are estimated at the receiver in the presence of interference consisting of two main components: one due to the additive noise and the other due to (interfering) symbols transmitted via the remaining antennas. This has been shown to hamper the performance of a communication system resulting in incorrect symbol decisions, particularly at low SNR. IMMSE has been devised as a solution to cope with this problem; In IMMSE processing, the symbols sent via each transmit antenna are decoded iteratively. In each stage of processing, the received signal is updated by removing the contribution of symbols detected in the previous iterations. In principle, this reduces the additive interference in which the desired symbols are embedded in. Therefore, the interference level should reduce monotonically as one goes down in processing order. In a noisy environment, however, any incorrect decision made on a symbol in an iteration leaves its contribution in the updated received signal available for processing in the following iterations. Fortunately, if the level of interference is estimated and the soft bits are scaled appropriately by the estimated interference power, the performance of IMMSE receiver can be greatly improved. Preferred embodiments estimate the interference by computing the probability of error in decoding the symbols of the previous stage(s). The computation of decision error probability depends on the constellation size of transmitted symbols and introduces very little processing overhead.

摘要翻译： 在采用LMMSE接收机的MIMO无线通信中，在存在由两个主要部分组成的干扰的接收机处估计通过发射天线发射的符号：一个由于加性噪声而导致的，另一个是由于通过剩余的 天线。 已经显示出妨碍通信系统的性能，导致不正确的符号决定，特别是在低SNR下。 IMMSE已被设计为解决这个问题的办法; 在IMMSE处理中，经由每个发送天线发送的符号被迭代地解码。 在每个处理阶段，通过去除在先前迭代中检测到的符号的贡献来更新接收到的信号。 原则上，这降低了嵌入期望符号的附加干扰。因此，干扰电平在处理顺序下降时单调减少。 然而，在嘈杂的环境中，在迭代中对符号做出的任何不正确的决定使其在更新的接收信号中的贡献可用于在以下迭代中进行处理。 幸运的是，如果估计干扰水平，并通过估计的干扰功率适当地缩放软比特，则可以大大提高IMMSE接收机的性能。 优选实施例通过计算解码前一级的符号的误差概率来估计干扰。 决策误差概率的计算取决于传输符号的星座大小，并引入很少的处理开销。

公开(公告)号：US07509565B2

公开(公告)日：2009-03-24

申请号：US11470916

申请日：2006-09-07

申请人： Xiaolin Lu ,  Srinath Hosur ,  Manish Goel ,  Michael O Polley

发明人： Xiaolin Lu ,  Srinath Hosur ,  Manish Goel ,  Michael O Polley

IPC分类号： H03M13/00 ,  H04L5/16

CPC分类号： H04W56/009 ,  H04L7/048 ,  H04L7/10 ,  H04W24/00 ,  H04W74/00

摘要： A resynchronization method for use in a data communication system having a first device configured to transmit data at a symbol rate to a second device. The second device includes a Reed Solomon (RS) decoder having a RS lock indicator and a Moving Picture Experts Group (MPEG) Protocol Interface (MPI) having a MPI lock indicator, wherein the RS and MPI lock indicators are monitored. Four different states, defined by the values of the RS and MPI lock indicators, determine whether the data communication system will wait for the RS decoded and the MPI hardware block to resynchronize, whether an intermediate-subset of the channel acquisition algorithm is performed or whether the entire channel acquisition algorithm is performed. The method of resynchronization described herein recovers synchronization within a predetermined time without the layers above the physical link layer having knowledge.

摘要翻译： 一种用于具有第一设备的数据通信系统中的再同步方法，该第一设备被配置为以符号速率向第二设备发送数据。 第二装置包括具有RS锁指示器的Reed Solomon（RS）解码器和具有MPI锁定指示器的运动图像专家组（MPEG）协议接口（MPI），其中监视RS和MPI锁定指示符。 由RS和MPI锁指示器的值定义的四种不同状态确定数据通信系统是否将等待RS解码和MPI硬件块重新同步，无论是执行信道获取算法的中间子集还是执行 执行整个信道获取算法。 本文所述的重新同步的方法在预定时间内恢复同步，而不具有具有知识的物理链路层之上的层。

公开(公告)号：US20080095281A1

公开(公告)日：2008-04-24

申请号：US11323746

申请日：2005-12-30

申请人： Srinath Hosur ,  Michael O. Polley ,  Anuj Batra ,  Manish Goel

发明人： Srinath Hosur ,  Michael O. Polley ,  Anuj Batra ,  Manish Goel

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04L25/03203 ,  H04L1/0631 ,  H04L25/03184 ,  H04L25/0328 ,  H04L27/2601

摘要： In a wireless MIMO system with interference cancellation, compensate for decision errors in the cancelled symbols by adjustments to the scaling of the soft estimates with additive interference-proportional to estimates of the decision error probability.

摘要翻译： 在具有干扰消除的无线MIMO系统中，通过对具有与决策误差概率的估计成比例的加性干扰的软估计的缩放进行调整来补偿所取消符号中的判定误差。

公开(公告)号：US07050768B2

公开(公告)日：2006-05-23

申请号：US10744310

申请日：2003-12-22

申请人： Srinath Hosur ,  Srikanth Gummadi ,  Michael O. Polley ,  Manish Goel

发明人： Srinath Hosur ,  Srikanth Gummadi ,  Michael O. Polley ,  Manish Goel

IPC分类号： H04B1/02

CPC分类号： H04B7/0689 ,  H04B7/04

摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, a signal field controller, a method of controlling signal fields and a MIMO transmitter incorporating the controller or the method. In one embodiment, the controller includes: (1) a primary signal field mode indicator configured to cause a primary signal field to indicate a presence of a supplemental signal field and provide the primary signal field to the MIMO transmitter for transmission thereby and (2) a supplemental signal field generator coupled to the primary signal field mode indicator and configured to provide a supplemental signal field to the MIMO transmitter for further transmission thereby only when the primary signal field indicates the presence.

摘要翻译： 用于多输入多输出（MIMO）发射机，信号场控制器，控制信号场的方法和包含控制器或方法的MIMO发射机。 在一个实施例中，控制器包括：（1）主信号场模式指示符，其被配置为使主信号域指示补充信号场的存在，并将主信号字段提供给MIMO发射机用于传输，以及（2） 辅助信号场发生器，其耦合到主信号场模式指示符并且被配置为仅在主信号字段指示存在时向MIMO发射机提供补充信号字段以进一步发送。

公开(公告)号：US20050265465A1

公开(公告)日：2005-12-01

申请号：US10857417

申请日：2004-05-27

申请人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Muhammed Ikram ,  Manish Goel ,  Michael Polley

发明人： Srinath Hosur ,  Jaiganesh Balakrishnan ,  Muhammed Ikram ,  Manish Goel ,  Michael Polley

IPC分类号： H03D1/00 ,  H04B7/02 ,  H04B7/10 ,  H04L25/02 ,  H04L25/06 ,  H04L27/06 ,  H04L27/26

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/067

摘要： In MIMO wireless communications employing LMMSE receiver, the symbols transmitted through a transmit antenna are estimated at the receiver in the presence of interference consisting of two main components: one due to the additive noise and the other due to (interfering) symbols transmitted via the remaining antennas. This has been shown to hamper the performance of a communication system resulting in incorrect symbol decisions, particularly at low SNR. IMMSE has been devised as a solution to cope with this problem; In IMMSE processing, the symbols sent via each transmit antenna are decoded iteratively. In each stage of processing, the received signal is updated by removing the contribution of symbols detected in the previous iterations. In principle, this reduces the additive interference in which the desired symbols are embedded in. Therefore, the interference level should reduce monotonically as one goes down in processing order. In a noisy environment, however, any incorrect decision made on a symbol in an iteration leaves its contribution in the updated received signal available for processing in the following iterations. Fortunately, if the level of interference is estimated and the soft bits are scaled appropriately by the estimated interference power, the performance of IMMSE receiver can be greatly improved. Preferred embodiments estimate the interference by computing the probability of error in decoding the symbols of the previous stage(s). The computation of decision error probability depends on the constellation size of transmitted symbols and introduces very little processing overhead.

摘要翻译： 在采用LMMSE接收机的MIMO无线通信中，在存在由两个主要部分组成的干扰的接收机处估计通过发射天线发射的符号：一个由于加性噪声而导致的，另一个是由于通过剩余的 天线。 已经显示出妨碍通信系统的性能，导致不正确的符号决定，特别是在低SNR下。 IMMSE已被设计为解决这个问题的办法; 在IMMSE处理中，经由每个发送天线发送的符号被迭代地解码。 在每个处理阶段，通过去除在先前迭代中检测到的符号的贡献来更新接收到的信号。 原则上，这降低了嵌入期望符号的附加干扰。因此，干扰电平在处理顺序下降时单调减少。 然而，在嘈杂的环境中，在迭代中对符号做出的任何不正确的决定使其在更新的接收信号中的贡献可用于在以下迭代中进行处理。 幸运的是，如果估计干扰水平，并通过估计的干扰功率适当地缩放软比特，则可以大大提高IMMSE接收机的性能。 优选实施例通过计算解码前一级的符号的误差概率来估计干扰。 决策误差概率的计算取决于传输符号的星座大小，并引入很少的处理开销。

公开(公告)号：US20050171987A1

公开(公告)日：2005-08-04

申请号：US10919873

申请日：2004-08-17

申请人： Manish Goel ,  David Milliner ,  Srinath Hosur ,  Muhammad Ikram

发明人： Manish Goel ,  David Milliner ,  Srinath Hosur ,  Muhammad Ikram

IPC分类号： G06F7/38 ,  H04B7/04 ,  H04L25/02

CPC分类号： H04B7/0413 ,  H04L25/024

摘要： The present invention provides a folded low-complexity (FLC) pipeline. In one embodiment, the FLC pipeline includes a dot product unit chain configured to employ only addition and multiplication operations to compute intermediate numerators and denominators from a received signal matrix, a channel gain matrix and a noise matrix. Additionally, FLC pipeline also includes a divider stage configured to terminate the dot product unit chain by computing an unscaled quotient and a scale factor from ultimate ones of the intermediate numerators and denominators.

摘要翻译： 本发明提供了一种折叠的低复杂度（FLC）流水线。 在一个实施例中，FLC流水线包括点积单位链，其被配置为仅采用加法和乘法运算来从接收信号矩阵，信道增益矩阵和噪声矩阵计算中间分子和分母。 另外，FLC管线还包括分配器级，其被配置为通过计算未经缩放的商和从最终的中间分子和分母的比例因子来终止点积单位链。

公开(公告)号：US20050138194A1

公开(公告)日：2005-06-23

申请号：US10744864

申请日：2003-12-23

申请人： Xiaolin Lu ,  Manish Goel ,  Srinath Hosur ,  Arndt Mueller

发明人： Xiaolin Lu ,  Manish Goel ,  Srinath Hosur ,  Arndt Mueller

IPC分类号： G06F15/16 ,  G06F15/173 ,  H04L29/06

CPC分类号： H04L29/06 ,  H04L69/18

摘要： In at least some embodiments, a system may comprise one or more devices configured to communicate according to a first protocol that uses a data frame comprising a header field and a data field and one or more devices configured to communicate according to a second protocol that uses a data frame comprising a header field, a header extension, and a data field. The data frame used by the second protocol may comprise fictitious information for interpretation by the one or more devices configured according to the first protocol. In accordance with some embodiments of the invention, the devices configured according to the first protocol may use the fictitious information to determine a data transmission duration of data packets sent by devices configured according to the second protocol, even though the data packets may be sent according to parameters that are not supported by the first protocol.

摘要翻译： 在至少一些实施例中，系统可以包括被配置为根据第一协议进行通信的一个或多个设备，所述第一协议使用包括报头字段和数据字段的数据帧，以及被配置为根据使用的第二协议进行通信的一个或多个设备 包括报头字段，报头扩展和数据字段的数据帧。 由第二协议使用的数据帧可以包括用于由根据第一协议配置的一个或多个设备的解释的虚构信息。 根据本发明的一些实施例，根据第一协议配置的设备可以使用虚构信息来确定根据第二协议配置的设备发送的数据分组的数据传输持续时间，即使可以根据第二协议发送数据分组 到第一个协议不支持的参数。

公开(公告)号：US20050136935A1

公开(公告)日：2005-06-23

申请号：US10744310

申请日：2003-12-22

申请人： Srinath Hosur ,  Srikanth Gummadi ,  Michael Polley ,  Manish Goel

发明人： Srinath Hosur ,  Srikanth Gummadi ,  Michael Polley ,  Manish Goel

IPC分类号： H04Q7/20

CPC分类号： H04B7/0689 ,  H04B7/04

摘要： For use with a multiple-input, multiple-output (MIMO) transmitter, a signal field controller, a method of controlling signal fields and a MIMO transmitter incorporating the controller or the method. In one embodiment, the controller includes: (1) a primary signal field mode indicator configured to cause a primary signal field to indicate a presence of a supplemental signal field and provide the primary signal field to the MIMO transmitter for transmission thereby and (2) a supplemental signal field generator coupled to the primary signal field mode indicator and configured to provide a supplemental signal field to the MIMO transmitter for further transmission thereby only when the primary signal field indicates the presence.

摘要翻译： 用于多输入多输出（MIMO）发射机，信号场控制器，控制信号场的方法和包含控制器或方法的MIMO发射机。 在一个实施例中，控制器包括：（1）主信号场模式指示器，其被配置为使主信号域指示补充信号场的存在，并将主信号字段提供给MIMO发射机用于传输，以及（2） 辅助信号场发生器，其耦合到主信号场模式指示符并且被配置为仅在主信号字段指示存在时向MIMO发射机提供补充信号字段以进一步发送。