混沌混合DS/SFH扩频系统的抗干扰性能分析  

Anti-jamming Performance Analysis for Chaotic Hybrid DS/SFH Spread Spectrum System

作　　者：谢红[1] 林海英[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2002年第6期62-65,69,共5页Journal of Harbin Engineering University

摘　　要：在利用混沌系统设计扩频序列的基础上,分析了相干MSK调制的DS/SFH扩频信号在部分频带多频干扰和加性白高斯噪声下的性能.推导了在直接序列扩频信号带宽等于跳频频隙间隔时系统的误码率公式.对在最恶劣条件下,混合系统在不同参数时的抗干扰性能进行了仿真研究.结果表明,在某些情况下,在慢跳频系统中加入混沌直扩成分,在不增加系统带宽的条件下,可有效地改善系统抗多频干扰的能力.This paper analyses the performance of hybrid DS/SFH spread spectrum signal based on chaotic sequences and MSK modulation in the presence of partial band multitone jamming and Additive White Gaussian noise. The BER formula is derived when a DS spread spectrum signal bandwidth is equal to the FH slot spacing. The antijamming performance under different parameters is simulated for the worst case. The results show that, in some cases, the addition of DS spreading to a slow FH system can significantly improve the system's resistance to partial band multitone jamming, without increasing the total system bandwidth.

关 键 词：混沌扩频序列 多频干扰 DS/SFH混合系统 

分 类 号：TN911.4[电子电信—通信与信息系统]