借鉴了主成分分析算法（PCA），可以得到很精确的幅值、频率、相位估计，是小学期课程设计的题目，快速扩展随机生成树算法，已调制信号计算其普相关密度，随机调制信号下的模拟ppm，FIR 底通和带通滤波器和IIR 底通和带通滤波器。- It draws on principal component analysis algorithm (PCA), You can get a very accurate amplitude, frequency, phase estimation, Is the topic of the elementary school stage curriculum design, Rapid expansion of random spanning tree algorithm, Modulated signals to calculate its density Pu-related, Random ppm modulated analog signal under Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter.