基于matlab的数字信号处理经典实验代码及所有完整实验报告，系统响应，iir滤波器 fir滤波器，fft变换-Based on digital signal processing matlab experimental code and all the classic experiment report complete, the system response, iir filter fir filter, fft transform

本程序的基本功能是对信号进行傅里叶变换，并同时提取出他的时域和频域的特征值。-The basic function of this program is the signal to Fourier transform, and the simultaneous extraction of his time domain and frequency domain characteristic values.

提出一种基于快速傅里叶变换( F F T)提取相位的方法, 分析自混合干涉信号, 不增加系统复杂度就能将激光自混合( SM LD) 微位移测量精度提高到纳米量级。(A phase extraction method based on F F T is proposed. The self mixing interference signal is analyzed, and the accuracy of the self mixing (SM LD) micro displacement me