后面的FIR滤波器的设计中，为获得有限长单位取样响应，需要用窗函数截断无限长单位取样响应序列。
The back of the FIR filters design, to acquire limited long unit sampling response, need to use the window function truncation infinite long unit sampling response sequence.
后面的FIR滤波器的设计中，为获得有限长单位取样响应，需要用窗函数截断无限长单位取样响应序列。
The back of the FIR filters design, to acquire limited long unit sampling response, need to use the window function truncation infinite long unit sampling response sequence.
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