DSP环境下的低通滤波器源码，应用于信号处理，在频域下对信号进行低通滤波-DSP environment, low-pass filter source code, applied to intermediate frequency domain signal processing software algorithms

fir低通滤波程序，处用冲激响应函数，实现对信号的低通滤波。-fir low-pass filtering process, at the use of impulse response functions, to achieve a low-pass filtering the signal.

此程序是CCS5.5的FIR数字滤波C码，为低通滤波函数，程序内部有注释，可以结合matlab更改滤波函数。-This program is CCS5.5 FIR digital filter C code, a low-pass filtering function within the program notes, can be combined to change the filter matlab function.