用AR模型估计信号的功率谱的仿真:分别用svd-TLS的方法，4阶AR模型，100阶AR模型仿真信号-With the AR model to estimate the power spectrum of the simulation: each method of using svd-TLS, 4-order AR model, AR model order of 100 simulated signal

时间序列算法，建立AR模型，进行功率谱分析，Green函数等。-Time Series algorithm, the establishment of AR model, power spectrum analysis, Green function and so on.