谱估计（建立二阶AR模型）、利用FFT求解功率谱估计、利用AR模型的Yule-Walker方程求解模型参数等-Spectral estimation (the establishment of second-order AR model), using FFT to solve the power spectrum estimation using AR model of Yule-Walker equation model parameters such as

生成一个正弦信号，使用levinson-durbin算法和最终预测阶数准则FPE估计其AR模型的阶数，并且通过解Yule-Walker方程求得AR模型的参数，进而求得该正弦信号的功率谱-Generating a sinusoidal signal, using levinson-durbin algorithm to predict the order and final order of the criteria FPE estimates its AR model and AR model

现代谱估值中YULE-Walker法，Levision-durbin法与ARMA法比较，以及与经典谱估值的比较。-Compared with the classical spectrum valuation modern spectrum valuation YULE-Walker law, comparative law and Levision-durbin ARMA method, as well.

利用周期图法进行谱估计，与利用Levinson-Durbin递推法求解Yule-walker方程进行比较-Use periodogram spectral estimation method, and solution Yule-walker equation and Levinson-Durbin recursion method comparison