说明：  分别对线性调频信号、非线性调频信号、连续波信号、频率编码信号和相位编码信号的进行了信噪比特性分析，较为有用的程序，与大家分享
(Chirp signal, non-linear FM signal, continuous wave signal frequency coded signal and phase encoded signals were signal-to-noise ratio characteristic analysis, a more useful program, to share with you)