一种基于混沌振子的DSSS信号盲检测方法

直接序列扩频通信是一种具有强保密性和抗干扰性的先进通信体制,对DSSS信号的检测具有重要作用。将非线性科学中的混沌理论应用于DSSS信号的盲检测,结合DSSS信号特征研究了一种利用混沌振子进行检测的方法。首先分析了洛伦兹混沌振子检测周期信号的原理和DSSS信号模型,然后构造出了一个基于混沌振子阵列的盲检测系统,可实现对低信噪比条件下对DSSS信号的盲检测。最后,通过计算机仿真结果表明了该方法的有效性,且性能优于过去的一些算法。

Blind Detection of DSSS Signal based on Chaos Oscillator

Direct sequence spread spectrum communication,as an advanced communications system with strong confidentiality and anti-interference, plays an important role in DSSS signal detection. Chaos theory in nonlinear science is applied to blind detection of DSSS signal, and in combination with DSSS signal characteristics, a detection method with chaotic oscillator for signal detection is developed. Firstly, the theory of Lorenz chaos oscillator array for signal detection and DSSS signal mode are analyzed, then a blind detection system based on chaos oscillator array is constructed,thus to implement blind detection of DSSS signal under low SNR,finally, computer simulation indicates that this method is effective and is better in performance as compared with certain traditional methods.