混沌扩频通信系统中信道干扰的统计分析  

Statistical Analysis on the Channel Interference of Chaotic Spread Spectrum Communication System

作　　者：刘剑波[1] 叶春飞[1] 张树京[1] 

机构地区：[1]上海铁道大学电信工程系

出　　处：《铁道学报》1999年第3期60-63,共4页Journal of the China Railway Society

基　　金：上海市科技启明星基金

摘　　要：噪声和多用户干扰是影响混沌ＣＤＭＡＤＳ／ＳＳ通信系统性能的两个主要因素。本文推导了该通信系统接收信号的相关函数及其均方差，系统误码性能的数学表达式，得出了每信息比特的混沌序列码片长度、信道噪声功率及用户数目同系统性能之间的内在联系。利用这些结果可有效提高混沌扩频通信系统的性能。仿真结果说明了所得结果的有效性。Noise interference and multiaccess interference are the main impairment to the performance of chaotic CDMA DS/SS communication systems. The mathematical formulas of correlation function, the mean square value of the received signals, and the bit error rate performance of system are derived in this paper. The internal relations among the chip length of a chaotic spread spectrum sequence, the power of noise in the channel and the number of users have been revealed. The performance of chaotic spread spectrum communication systems can be improved by employing these formulas. Simulation results conform the efficiency of discussion in this paper.

关 键 词：混沌映射 相关函数 扩频通信系统 信道干扰 

分 类 号：TN914.4[电子电信—通信与信息系统]