BPSK信号以及BPSK信号扩频后信号的仿真，通过低通滤波器以后，做出其功率谱密度图，查看其信号特性。-BPSK signal and the signal spread spectrum BPSK signal simulation, after low-pass filter through to make its power spectral density maps, see the signal characteristics.

不同信号的循环谱（AM,BPSK,BFSK,DME等）可以直接使用，来分析信号的循环平稳特性。(The cyclic spectrum of different signals (AM, BPSK, BFSK, DME, etc.) can be directly used to analyze the cyclostationary characteristics of signals.)