混沌序列与Gold序列抗干扰性能仿真分析  

Performance simulation and analysis of anti-jamming of chaotic sequences and Gold sequences

作　　者：何世彪[1] 谷诚[1] 罗冬梅[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机工程与设计》2011年第2期623-627,共5页Computer Engineering and Design

摘　　要：为了提高直接扩频通信系统的抗干扰性能,提出了将混沌序列取代传统的伪随机序列并运用到直扩系统中。以改进型Logistic混沌序列为例,对其统计特性进行了理论与仿真分析。在此基础上建立模型,分别在单频干扰、部分频段干扰、脉冲干扰以及多址干扰的情况下,在高斯白噪声信道中对混沌序列与Gold序列扩频通信系统进行了蒙特卡罗法误码率仿真,并与理论误码率进行了比较。仿真结果表明,混沌序列不仅适用于直扩系统,而且其抗干扰性能要优于传统伪随机序列。In order to improve the anti-jamming performance of direct-sequence spread spectrum system （DSSS）, a method of replacing traditional pseudo-random sequences by the chaotic sequences in DSSS system is presented. Taking the improved logistic-map chaotic sequences for example, firstly, the statistical properties of the chaotic sequences are studied, Based on this analysis the model is con- structed, and then the BER （bit error rate） of the chaotic sequences and Gold sequences are simulated respectively in the presence of AWGN and different kinds of jamming such as single-tone jamming, partial-band jamming, impulsive jamming and MAI （multiple access interference） by Monte Carlo simulation, and compared with the theoretical values. The results show the chaotic sequences are suitable for DSSS, and the anti-jamming performance is better than traditional pseudo-random sequences.

关 键 词：直接序列扩频 混沌序列 GOLD序列 误码率 抗干扰 

分 类 号：TN914.4[电子电信—通信与信息系统]