公开(公告)号：US20160277229A1

公开(公告)日：2016-09-22

申请号：US14662099

申请日：2015-03-18

Applicant: Xilinx, Inc.

Inventor： Christopher H. Dick

IPC: H04L27/26 ,  H04L1/00

CPC classification number: H04L27/2623 ,  H04B1/005 ,  H04L1/0009 ,  H04L5/001 ,  H04L27/2624 ,  H04L27/2631

Abstract: Apparatus, system and method relates generally to data communication with noise-shaping crest factor reduction using polyphase transformation. In such a method, a composite signal is received by a delay and a waveform generator. The waveform generator is for noise-shaping crest factor reduction using polyphase transformation. The composite signal is delayed by the delay to provide a delayed composite signal. A waveform is generated by the waveform generator from the composite signal. The waveform is output from the waveform generator having clipping noise with respect to bands of corresponding carriers of the composite signal. The waveform is subtracted from the delayed version of the composite signal for peak-to-amplitude power ratio reduction. A reduced peak version of the delayed version of the composite signal delayed is output from the signal combiner.

Abstract translation: 装置，系统和方法一般涉及使用多相变换的噪声整形波峰因数减少的数据通信。 在这种方法中，通过延迟和波形发生器接收复合信号。 波形发生器用于使用多相变换进行噪声整形波峰因数降低。 复合信号被延迟延迟以提供延迟复合信号。 由复合信号由波形发生器产生波形。 该波形相对于复合信号的相应载波的频带从具有限幅噪声的波形发生器输出。 从复合信号的延迟版本中减去峰值功率比降低波形。 从信号组合器输出延迟的复合信号的延迟版本的降低峰值版本。

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。

公开(公告)号：US09014241B2

公开(公告)日：2015-04-21

申请号：US13674867

申请日：2012-11-12

Applicant: Xilinx, Inc.

Inventor： Christopher H. Dick

IPC: H04B1/38 ,  H04L5/16 ,  H04B7/005 ,  H03F1/32 ,  H03F3/189 ,  H03F3/24

CPC classification number: H04B7/005 ,  H03F1/3247 ,  H03F3/189 ,  H03F3/245 ,  H03F2201/3212 ,  H03F2201/3233

Abstract: A method of performing digital pre-distortion in a communication network is described. The method comprises implementing a transceiver in the communication network, the transceiver enabling the transfer of communication signals in the communication network by way of a wireless communication channel; sampling signals, at the transceiver, associated with a transmit signal which are necessary to perform digital pre-distortion; providing the sampled signals to a remote computer; and generating, at the remote computer, parameters to be applied to a digital pre-distortion circuit of the transceiver. A communication network configured to enable digital pre-distortion is also described.

Abstract translation: 描述了在通信网络中执行数字预失真的方法。 该方法包括在通信网络中实现收发信机，收发机能够通过无线通信信道传送通信网络中的通信信号; 在收发器处采样信号与执行数字预失真所必需的发射信号相关联; 将采样信号提供给远程计算机; 以及在所述远程计算机处产生要应用于所述收发器的数字预失真电路的参数。 还描述了被配置为实现数字预失真的通信网络。

公开(公告)号：US09008156B1

公开(公告)日：2015-04-14

申请号：US14267846

申请日：2014-05-01

Applicant: Xilinx, Inc.

Inventor： Christopher H. Dick

IPC: H04B3/36 ,  H04B7/17 ,  H04B17/02 ,  H04L25/20 ,  H04L25/52

CPC classification number: H03F1/3247 ,  H04B7/15528 ,  H04L25/03343 ,  H04L25/03828 ,  H04L27/0012 ,  H04W84/047

Abstract: An apparatus relates generally to a repeater. In such an apparatus, the repeater has a signal analysis and classification block. The signal analysis and classification block includes a signal analysis block and a classification block. The signal analysis block is coupled to receive a digital signal which is a digital version of an input signal received by the repeater. The signal analysis block is coupled to provide signal information regarding the digital signal to the classification block. The classification block is configured to provide classification information to classify the digital signal using the signal information provided as being a waveform type of a group of waveform types.

Abstract translation: 一种装置一般涉及中继器。 在这种装置中，中继器具有信号分析和分类块。 信号分析和分类块包括信号分析块和分类块。 信号分析块被耦合以接收作为中继器接收的输入信号的数字版本的数字信号。 信号分析块被耦合以向分类块提供关于数字信号的信号信息。 分类块被配置为提供分类信息，以使用提供为波形类型的波形类型的信号信息对数字信号进行分类。