公开(公告)号：US5917852A

公开(公告)日：1999-06-29

申请号：US873538

申请日：1997-06-11

申请人： Lee A Butterfield ,  Thomas R Giallorenzi ,  L Andrew Gibson, Jr. ,  Dan M Griffin ,  Johnny M Harris ,  Steven B Perkins ,  R William Steagall

发明人： Lee A Butterfield ,  Thomas R Giallorenzi ,  L Andrew Gibson, Jr. ,  Dan M Griffin ,  Johnny M Harris ,  Steven B Perkins ,  R William Steagall

IPC分类号： G09C1/00 ,  H04B1/707 ,  H04L9/20 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC分类号： H04B1/707

摘要： Users or subscribers of a multi-user communications system, such as a spread spectrum communications system, provide signals to the central station or base unit of that system, and receive signals therefrom. Avoidance of interference among those users' signals is needed to ensure proper operation of the system. To do so, the data of each user is individually scrambled to randomize the data that different users are transmitting, in order to improve tracking performance at a receiver. The data of each user is scrambled independently, in a manner unique to that user in the system, in order to improve tracking performance and detection performance of a receiver. This scrambling makes the multi-user interference zero mean, and makes it possible to integrate out or average out the multi-user interference. The pattern or sequence used for this scrambling, and the pattern or sequence used for spreading here, are preferably identical except in frequency.

摘要翻译： 诸如扩频通信系统的多用户通信系统的用户或用户向该系统的中心站或基站提供信号，并从其接收信号。 需要避免用户信号之间的干扰，以确保系统的正常运行。 为了这样做，每个用户的数据被单独加扰以随机化不同用户正在发送的数据，以便提高接收机的跟踪性能。 为了提高接收机的跟踪性能和检测性能，每个用户的数据以系统中该用户唯一的方式独立地加扰。 这种扰乱使得多用户干扰为零是平均的，并且使得可以整合或平衡多用户干扰。 用于该扰频的模式或序列以及用于在此扩展的模式或序列优选地在频率以外是相同的。