对信号进行频谱分析及滤波，应用小区域方差对比，程序简单，滤波求和方式实现宽带波束形成，多元数据分析的主分量分析投影，模拟数据分析处理的过程，用于时频分析算法，FIR 底通和带通滤波器和IIR 底通和带通滤波器。- The signal spectral analysis and filtering, Application of small area variance comparison, simple procedures, Filtering summation way broadband beamforming, Principal component analysis of multivariate data analysis projection, Analog data analysis processing, For time-frequency analysis algorithm, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter.