利用MATLAB实现 FIR滤波器设计与滤波的方法，而且方法简单、快捷，大大减轻了工作量。滤波器的设计工作完成后，可以借助于MATLAB的export操作导出所设计滤波器的系统函数H(z)。简化了工作量-FIR filter design using MATLAB and filtering method, and the method is simple, fast, greatly reducing the workload. Filter design work is completed, you can export the aid of MATLAB export operation designed filter system function H (z). Simplifying the workload