直扩系统中两种PN码同步方法的比较与仿真

Comparison and Simulation of Two Schemes for PN Code Synchronization in DS/SS System

扩频伪随机码 (PN码 )的同步是扩频接收中的关键技术。介绍了在直接序列扩频系统 (DS/SS)中 ,传统的滑动相关同步法以及一种新型的串并结合的PN码快速同步法的实现方案 ,分析了两种方法的基本设计思想 ,并根据仿真结果比较了它们的性能 ,表明PN码快速同步法比滑动相关同步法的平均同步时间缩短了 3倍左右 。

Synchronization of pseudonoise code is a crucial technique to spread spectrum reception systems. In this paper, the conventional sliding correlate scheme and a novel rapid synchronization scheme combining with serial and parallel processing are introduced. Their basic designing ideas are analyzed and the performances for both are also compared according to the simulation results.The average time of synchronization for the latter is 3 times less than the former.It indicates that in many cases the rapid synchronization scheme is more effective than the sliding correlate scheme.