公开(公告)号：US5619524A

公开(公告)日：1997-04-08

申请号：US396453

申请日：1995-02-28

申请人： Fuyun Ling ,  Thomas A. Sexton ,  Gene Bruckert

发明人： Fuyun Ling ,  Thomas A. Sexton ,  Gene Bruckert

IPC分类号： H04L27/22 ,  H04B1/707 ,  H04J3/06 ,  H04L7/00 ,  H04L25/02 ,  H04L27/227 ,  H04K1/00 ,  H04B1/66

CPC分类号： H04B1/7087 ,  H04B1/707 ,  H04J3/0605 ,  H04L25/0202 ,  H04L27/2276 ,  H04B1/7117 ,  H04B2201/70703 ,  H04B2201/70705

摘要： A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread spectrum communication signal is despread with a spreading code to derive a stream of reference samples and a stream of data samples. The channel response is estimated by utilizing the stream of reference samples. An offset frequency detector determines an offset to be applied to the received signal via a frequency locked loop, while a timing control compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples and/or the stream of data samples. A rate estimator determines the rate at which the information was encoded, and the rate information is used to optimize the timing control, frequency offset detector and channel estimator. Thus an improved detection of estimated data symbols from the stream of received data samples is provided.

摘要翻译： 提供了一种用于促进相干通信接收的方法和装置。 接收到的参考符号编码的扩展频谱通信信号用扩展码进行解扩，以导出参考样本流和数据采样流。 通过利用参考样本流来估计信道响应。 偏移频率检测器通过频率锁定环来确定要施加到接收信号的偏移，而定时控制基于从参考样本流和/或数据流导出的功率估计来补偿慢定时漂移和快衰落 样品。 速率估计器确定信息被编码的速率，速率信息用于优化定时控制，频率偏移检测器和信道估计器。 因此，提供了从接收的数据样本流中对估计数据符号的改进的检测。