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使用数字滤波器主要有以下三方面原因：（１）最接近理想滤波器；（２）用软件调整滤波器性能；（３）滤波器的响应与被采样数据相容。第一部介绍过有限冲激响应（ＦＩＲ）和无限冲激响应（ＩＲ）两种滤波器。ＦＩＲ的响应之所以称为“有限”，是因为输出仅与有限个输入样...
There are three main reasons for using a digital filter: (1) the closest ideal filter; (2) software performance tuning of the filter; and (3) the response of the filter is compatible with the sampled data. The first section introduces both finite impulse response (FIR) and infinite impulse response (IR) filters. FIR response is called “limited” because the output is limited to a limited number of inputs ...