采用的是脉冲对消法，对于初学者具有参考意义，最大似然（ML）准则和最大后验概率（MAP）准则，随机调制信号下的模拟ppm，预报误差法参数辨识-松弛的思想，有PMUSIC 校正前和校正后的比较。- It uses a pulse of consumer law, For beginners with a reference value, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Random ppm modulated analog signal under Prediction Error Method for Parameter Identification- the idea of relaxation, A relatively before correction and after correction PMUSIC.