短码元长度长波PSK 信号的一种混沌检测方法

为解决对潜通信中部分带宽相移键控信号(phase shift keying，PSK)无法被检测的问题，从混沌振子检测PSK 信号的原理出发，提出一种短码元长度PSK 信号的混沌检测方法。利用PSK 信号载波间相关系数的特点提取先验相位信息，结合固有载波信息生成待测序列，构造新的判别依据进行相位判别，并以8PSK 信号为例进行仿真实验。仿真实验表明：该方法能够检测该类信号且保持较传统的相干检测、非相干检测更优良的检测性能，并降低了传统的混沌检测方法的运算量。

Chaos Detection Method for Long Wave PSK Signal with Short Code Length

In order to solve the problem that some phase shift keying signals in some bandwidth cannot be detected incommunication to submarine, a chaotic detection method of the short code length PSK signal is proposed based on theprinciple of detecting the PSK signal by the chaotic oscillator. The a priori phase information is extracted by using thecorrelation coefficient between the PSK signals, and the inherent carrier information is used to generate the sequence to betested. A new discriminant basis is constructed to perform phase discrimination. Taking 8PSK signals for example tosimulate, the results show that this method can realize detection and keep better detection ability than traditional coherentdetection and incoherent detection, and the amount of traditional chaotic detection computation has been cut down.