公开(公告)号：US06229862B1

公开(公告)日：2001-05-08

申请号：US08182035

申请日：1994-01-14

Applicant: William Timothy Webb

Inventor： William Timothy Webb

IPC: H04L702

CPC classification number: H04L7/0054 ,  H04L7/0083 ,  H04L7/0334

Abstract: A method of recovery timing information and a clock recovery system for digital data signals are described, in which a digital data signal is assessed to determine the occurrence of a peak in part of the signal and the suitability of that peak for providing timing information. In the clock recovery systems described a peak evaluator has a maximum peak detector for determining the maximum oversampled value in a symbol period and the sampling point at which that maximum occurred, and peak score calculator for establishing a measure of the suitability of the peak by assessing the gradients of parts of the peak. The peak score associated with a maximum in the signal is compared with a similarly established minimum peak score by a comparator and the larger provided to a switch which, if the selected score exceeds a threshold, updates a phase lock loop, with the sampling point at which that peak occurred.

Abstract translation: 描述了用于数字数据信号的恢复定时信息和时钟恢复系统的方法，其中评估数字数据信号以确定部分信号中的峰值的出现以及用于提供定时信息的该峰值的适用性。 在所描述的时钟恢复系统中，峰值评估器具有用于确定符号周期中的最大过采样值的最大峰值检测器和发生该最大值的采样点以及用于通过评估来建立峰值适合度的度量值的峰值计算器 高峰部分的梯度。 与信号中的最大值相关联的峰值分数与比较器的类似建立的最小峰值得分进行比较，并且较大的提供给开关，如果所选得分超过阈值，则更新锁相环，其中采样点为 哪个峰值发生。

公开(公告)号：US5828695A

公开(公告)日：1998-10-27

申请号：US162016

申请日：1994-02-18

Applicant: William Timothy Webb

Inventor： William Timothy Webb

IPC: H04B7/26 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L27/34 ,  H04B1/38 ,  H04B1/40

CPC classification number: H04L1/08 ,  H04L1/0025 ,  H04L1/20 ,  H04L1/0021

Abstract: A radio system is so designed as to allow each of a pair of transceivers to assess the quality of the link, and to modify the signal constellation accordingly. Each transceiver monitors the quality of the channel by assessing the strength of the received signal, or the bit error rate, or both. The system is specifically adapted to time division duplex (TDD) transmission over fast fading channel. In each block of data, the first bit is a QPSK (4QAM) signal, which indicates which constellation is to be used.

Abstract translation: PCT No.PCT / GB92 / 00988 Sec。 371日期1994年2月18日 102（e）1994年2月18日PCT PCT 1992年6月2日PCT公布。 第WO92 / 22162号公报 日期1992年12月10日无线电系统被设计为允许一对收发器中的每一个来评估链路的质量，并相应地修改信号星座。 每个收发器通过评估接收信号的强度或误码率或两者来监视信道的质量。 该系统特别适用于通过快速衰落信道的时分双工（TDD）传输。 在每个数据块中，第一个比特是一个QPSK（4QAM）信号，它指示要使用哪个星座。