扩频通信系统中关键问题的研究  

Research on the Key Problems of Direct Sequence Spread Spectrum System

作　　者：齐志强[1] 杨海涛[1] 

机构地区：[1]中国空空导弹研究院,洛阳471009

出　　处：《中国新通信》2009年第17期29-33,共5页China New Telecommunications

摘　　要：本文对全数字直接扩频差分四进制移相键控调制系统(DEQPSK)进行了仿真,求出误码率并通过定点仿真确定硬件编程时所需要的字长。文章详细给出了各个实现中所需要的参数,并且在仿真中得到了各个模块的定点仿真字长。在滑动窗定时捕获模块中还对相关峰值的求解作了改进,使得字长节省将近一半的情况下,性能几乎没有损失。In this paper, an all-digital differentially encoded quaternary phase shift keying （DEQPSK）direet sequence spread spectrum system is introduced. The parameters used in this system is given. In the simulation we also shows the wordlength of every model, which can be used in hardware simulation. In sliding window model, we improve the algorithm for calculate the correlation peak, and the improved algorithm save nearly half of the word length without any perforn]anee reduced.

关 键 词：直接序列扩频 滑动窗 定点仿真 

分 类 号：TN914.42[电子电信—通信与信息系统]