October 2003
Intermediate to advanced
304 pages
7h 46m
English
Content preview from Practical Digital Signal Processing
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Infinite impulse response (IIR) filter design
Infinite impulse response (IIR) filters have impulse responses that are infinite in duration. This is in contrast with the impulse responses of FIR filters, which are non-zero for only a finite number of samples. The relationship between the input and output of an IIR filter is given by the recursive formula:
The current output sample is computed from the past M inputs and the current input sample plus the previous N output samples. The second term on the right-hand side is of the same form as FIR filters. The first term is the feedback or recursive part of the equation, which causes the response ...
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