一个FIR数字低通滤波器的设计，在CCS设计之前先在MATLAB中进行仿真，观察一下效果。并得到参数，然后再导入CCS中，用CCS实现FIR滤波器的设计。-A low-pass FIR digital filter design, design before the CCS in the MATLAB simulation and observe the results. And are parameters, and then import the CCS, the CCS to achiev