针对一个含有5Hz、15Hz和30Hz的混和正弦波信号，设计一个FIR带通滤波器。-For a the one containing 5Hz, 15Hz and 30Hz a mixture of sine wave signals, designing an FIR band pass filter.

窗函数法设计滤波器详细介绍，绝对原创，精心力作，有源码和word介绍-Window function design filter details, absolutely original, well-masterpiece, a source and word introduction