基于混沌振子的BPSK信号解调  

Demodulation of BPSK signal based on chaotic oscillator

作　　者：高清山[1] 张天骐[1] 代少升[1] 刘燕丽[1] 

机构地区：[1]重庆邮电大学信号处理与片上系统研究所,重庆市400065

出　　处：《微计算机信息》2010年第4期207-209,共3页Control & Automation

基　　金：项目名称:极微弱调制扩频信号的检测与估计方法研究;基金颁发部门:国家自然科学基金委和中国工程物理研究院(NSAF联合基金)(10776040);项目名称:低信噪比DS及UWB类扩频通信信号的盲处理研究;基金颁发部门:国家自然科学基金委(60602057)

摘　　要：基于混沌系统对参数的摄动及其敏感性,分析了混沌系统微弱信号检测的基本原理,推导出混沌系统产生相变的相位条件,结合二进制相移键控(BPSK)信号的相位变化特点,提出了利用duffing系统进行强噪声背景中二进制相移键控(BPSK)信号解调的方法。鉴于观察混沌系统相平面判别系统状态的不足,提出了利用功率谱熵对系统不同状态复杂度进行判别的新方法。理论分析和仿真实验都证明了利用混沌振子解调BPSK信号的可行性。Based on the perturbation and sensibility of chaotic system to its parameter,the basic principle of the chaotic system weak signal detection is analyzed,and the phase condition of the phase change happening is deduced.By combining with the phase changes characteristics of binary phase shift keying （BPSK） signal,a method to demodulate the binary phase shift keying signal in noise back- ground by using duffing system is presented. Whereas the disadvantage of judging the system state by observing the phase plane of chaotic system, a new method is presented for power spectrum entropy used to judge the comPlexity of the different system state.The- oretical analysis and simulation results prove the feasibility of demedulating BPSK signal by chaotic oscillator.

关 键 词：混沌系统 DUFFING振子 BPSK信号 功率谱熵 解调 

分 类 号：TN911.23[电子电信—通信与信息系统]