混沌跳码扩频通信系统及其抗干扰性能分析  

The Chaotic Code-hopping Spread Spectrum Communication System

作　　者：雷莉[1] 郑建生[1] 刘郑[2] 

机构地区：[1]武汉大学电子信息学院,武汉430072 [2]武汉大学GNSS中心,武汉430072

出　　处：《科学技术与工程》2014年第30期176-180,共5页Science Technology and Engineering

基　　金：国家自然科学基金(61273053)资助

摘　　要：随着无线通信盲检测技术的发展,传统直扩通信技术的安全性问题已经不能被忽视,为此提出了一种新型的直扩体制——跳码直扩。在跳码直扩体制的基础上,采用混沌序列设计跳码图案和扩频码集,用初值敏感、随机特性好、相关特性好的混沌序列来产生跳码图案和扩频码,进一步提高跳码扩频通信的抗干扰和抗截获性能。设计了一个混沌跳码扩频通信系统,分析比较混沌序列与m序列的相关特性,并通过MATLAB仿真,分析跳码混沌扩频通信系统的通信性能、抗干扰性能和抗截获性能。仿真结果表明跳码混沌扩频通信系统具有更好的抗干扰抗截获性能,在今后的反侦察通信方面具有更大的发展前景。With the development of the blind detection technology in the area of wireless communication,security issues of traditional Direct Sequence Spread Spectrum( DSSS) system can be no longer ignored.Therefore,Code-Hopping( CH) DSSS system,which is a fire-new spread spectrum system,is put forward.In this paper,chaotic sequence,with its highly good initial value sensitivity,random characteristics as well as correlated characteristics,is used to generate hopping code pattern and spreading code,so that the anti-jamming performance and intercept resistance of the CH DSSS communication system is improved considerably.Here,we design a chaotic CH DSSS communication system.MATLAB-based simulation is conducted to compare the correlation properties of chaotic sequences and M sequences and to analyze communication performance,anti-jamming performance and intercept resistance of the chaotic CH DSSS communication system.Simulation results reveal that the system,which performs better than the traditional ones,can be vigorously developed in the field of anti-reconnaissance communication.

关 键 词：混沌序列 跳码图案 跳码扩频 抗干扰 抗截获 

分 类 号：TN914[电子电信—通信与信息系统]