说明：  本文介绍了数字信号处理中各种算法基本原理，包括Z 变换、DFT 变换及其快速 算法FFT 等信号变换算法和包括IIR 与FIR 数字滤波器的设计与实现，详细论述了利用 MATLAB 软件对信号变换和设计数字滤波器的原理﹑ 步骤和实现方法，并给出了基于 MATLAB 的模拟与仿真。文章最后给出了实验结果，并就其结果做了进一步的解释和说明。 关键词：Z 变换，离散傅立叶变换DFT，数字滤波器，系统结构仿真
(This article describes a variety of digital signal processing algorithms in the basic principles, including the Z transform, DFT transform and its fast algorithm FFT and other signal transform algorithm and including IIR and FIR digital filter design and implementation, discussed in detail by using MATLAB software, the signal transformation The principle and design of digital filters ﹑ steps and implementations, and gives MATLAB-based simulation and emulation. Article Finally, the experimental results and the results made on the further explanation and clarification. Key words: Z transform, discrete Fourier transform DFT, digital filter, system architecture simulation)