公开(公告)号：US07065171B1

公开(公告)日：2006-06-20

申请号：US09982952

申请日：2001-10-22

申请人： Derek S. Hilborn ,  Louis Leung ,  Hongliang Zhang

发明人： Derek S. Hilborn ,  Louis Leung ,  Hongliang Zhang

IPC分类号： H04L7/00

CPC分类号： H04L27/2662 ,  H04L7/007 ,  H04L27/2605 ,  H04L27/2657 ,  H04L27/2676

摘要： A method and apparatus provide efficient synchronization recovery at the receiver end for a digital transmission system. At the receiving end, a digital signal is received including a transmitted data portion and a guard period. A signal envelope for the received digital signal is determined, and the signal envelope is filtered to find the center of the guard period, which provides a time reference for the received digital signal. Embodiments of the present invention described herein may be used for optimal operation of a digital transmission system by efficiently recovering synchronization from a received digital signal during noisy conditions without being dependent on signal shape or requiring complicated threshold calculations.

摘要翻译： 方法和装置在数字传输系统的接收端提供有效的同步恢复。 在接收端，接收包括发送数据部分和保护周期的数字信号。 确定接收到的数字信号的信号包络，并对信号包络进行滤波以找到保护周期的中心，为接收到的数字信号提供时间参考。 本文描述的本发明的实施例可以用于数字传输系统的最佳操作，通过在噪声条件下有效地从接收的数字信号恢复同步，而不依赖于信号形状或需要复杂的阈值计算。