DSSS系统中伪码防错锁技术分析  

Analysis on Pseudo Code Error Lock Prevention Technology in DSSS

作　　者：周侃[1,2] 

机构地区：[1]西安电子科技大学,陕西西安710071 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2012年第4期37-40,共4页Radio Engineering

摘　　要：直接序列扩展频谱技术正被越来越多地应用于各种测控系统中。讨论了发生伪码错锁原因,并在此基础上针对伪码的自相关特性和互相关特性,分析了产生伪码错锁可能产生的影响。根据伪码错锁的原因以及伪码的捕获过程提出了3种伪码错锁的措施,包括选用改进伪码的自相关特性、互相关特性、功率控制技术以及改进伪码的捕获跟踪策略,并对3种伪码错锁措施进行了详细论述。The DSSS technique is used in TTC system more and more.This paper di scusses the phenomenon of pseudo code error lock.And then on the basis of this, the influence of pseudo code error lock is analyzed aiming at the self-correlat ion properties and cross correlation properties of pseudo code.According to the cause of pseudo code error lock and its capture process,three measures of pseu do code error lock prevention are put forward,including improving self-correlat ion properties and cross correlation properties of pseudo code,power control te chnique and capture and tracking strategy In addition,these three measures are discussed in detail.

关 键 词：DSSS 伪码错锁 旁瓣 多址干扰 

分 类 号：TN914.42[电子电信—通信与信息系统]