公开(公告)号：US09973363B1

公开(公告)日：2018-05-15

申请号：US15160998

申请日：2016-05-20

Applicant: Xilinx, Inc.

Inventor： Nihat E. Tunali ,  Michael Wu ,  Christopher H. Dick

IPC: H04L27/01 ,  H04L27/26 ,  H04J4/00 ,  H04J1/04 ,  H04B7/0491

CPC classification number: H04L27/2627 ,  H04B7/0491 ,  H04J1/045 ,  H04J4/005 ,  H04L27/01 ,  H04L27/2647 ,  H04L27/265

Abstract: A method includes receiving frequency domain (FD) symbols associated with data symbols transmitted in a channel on a frame including a plurality of subcarriers and a plurality of time-slots. An equalization process is performed to the received FD symbols to generate FD equalized symbols. The FD equalized symbols is transformed to time domain (TD) symbols. A demodulation process is performed to the TD symbols to provide estimates of the data symbols.

公开(公告)号：US09413390B1

公开(公告)日：2016-08-09

申请号：US14333436

申请日：2014-07-16

Applicant: Xilinx, Inc.

Inventor： Bei Yin ,  Michael Wu ,  Christopher H. Dick ,  Joseph R. Cavallaro

IPC: H03M13/11

CPC classification number: H03M13/1177 ,  H03M13/1111 ,  H03M13/1114 ,  H03M13/1117 ,  H03M13/1137 ,  H03M13/114 ,  H03M13/116 ,  H03M13/1165

Abstract: A LDPC decoder utilizes a new schedule that breaks a dependency between data of different layers of a parity check matrix, so that the forward scan in the next layer can begin to perform after a predetermined time has elapsed (i.e. a delay) since the backwards scan of the previous layer has begun, and before the backwards scan of the previous layer is completed. Accordingly, the computation at the next layer can begin as soon as possible.

Abstract translation: LDPC解码器利用破坏了奇偶校验矩阵的不同层的数据之间的依赖性的新调度，使得下一层中的正向扫描可以在经过预定时间（即，延迟）之后开始执行，因为向后扫描 的上一层已经开始，之前的层的向后扫描完成。 因此，下一层的计算可以尽快开始。

公开(公告)号：US09025691B1

公开(公告)日：2015-05-05

申请号：US14151493

申请日：2014-01-09

Applicant: Xilinx, Inc.

Inventor： Michael Wu ,  Christopher H. Dick

IPC: H04B7/02 ,  H04B1/06 ,  H04B7/04 ,  H04L27/01

CPC classification number: H04B1/06 ,  H04B7/0413 ,  H04L25/03159 ,  H04L25/03968 ,  H04L25/067 ,  H04L27/01

Abstract: A method relates generally to channel equalization. In this method, a filter matrix is determined for transmission antennas by a channel equalizer of a first receiver processing chain. A first QR decomposition is performed on a first extended matrix for a first iteration. LLRs are fed from a second receiver processing chain to the first receiver processing chain for a second iteration. Symbol information is obtained from the LLRs. Interference is canceled using the symbol information to provide residual information. The channel equalizer is updated with the symbol information. The residual information is provided to the channel equalizer. User matrices corresponding to the transmission antennas are determined by the channel equalizer. This determination includes performing a second QR decomposition on a second extended matrix to obtain updated values for the user matrices, and performing updates using the symbol information and the updated values to provide the user matrices.

Abstract translation: 一种方法一般涉及信道均衡。 在该方法中，由第一接收机处理链的信道均衡器确定发送天线的滤波器矩阵。 在第一次迭代的第一个扩展矩阵上执行第一个QR分解。 LLR从第二接收机处理链馈送到第一接收机处理链进行第二次迭代。 符号信息是从LLR获得的。 使用符号信息来取消干扰以提供残留信息。 信道均衡器用符号信息更新。 剩余信息被提供给信道均衡器。 与发送天线对应的用户矩阵由信道均衡器确定。 该确定包括在第二扩展矩阵上执行第二QR分解以获得用户矩阵的更新值，并且使用符号信息和更新值来执行更新以提供用户矩阵。