混沌扩频序列的改进与仿真  

Improvement and simulation of chaotic spreading sequence

作　　者：刘瑞芹[1] 任阳[2] 张凤元[2] 蔡秀雄[2] 

机构地区：[1]华北科技学院基础部,北京101601 [2]北京化工大学信息科学与技术学院,北京100029

出　　处：《计算机工程与应用》2009年第11期92-94,128,共4页Computer Engineering and Applications

基　　金：国家自然科学基金No.60872062~~

摘　　要：对原有的混沌序列数字量化过程提出一种改进的方法,该方法在运用中间多比特量化法的同时,采用截短技术对实值混沌序列进行量化,减少了序列的迭代次数与大量的初始值选择判决过程;采用国际上公认的FIPS PUB 140-2标准来对该序列进行随机特性检测、仿真,结果表明此序列具有良好的扩频特性;利用System View软件建立直接扩频通信模型加以仿真,验证其作为扩频码的可行性。In this paper,an improved method about the process of the original chaotic sequence quantify is proposed which not only uses the method of mid multi-bit quantifying but also uses the technology of truncation to quantify.This new method reduces the number of iteration and also reduces the process of choosing and judging initial value.It uses FIPS PUB 140-2,an internationally accepted rule,to examine and simulate the sequence randomly.The result shows that the sequence has a good quality.Also,SystemView is used to establish direct spread spectrum model to verify the feasibility as a spreading code.

关 键 词：混沌序列 量化 随机性 扩频通信系统 

分 类 号：TN914.4[电子电信—通信与信息系统]