滤波器噪音干扰之适应DSp编程设计程序，只有一点一旦。-filter noise interference adapt DSp program design process, there is only one event.

DSP实验的第12个，关于设计FIR滤波器，了解定点DSP运算特点。-12 of the DSP experimental design FIR filter to understand the characteristics of the fixed-point DSP operations.