Method for implementing finite impulse response filters

摘要

A method for determining an output of a finite impulse response digital filter having L filter coefficients in response to a set of M input samples, comprising the steps of:
(a) loading a first input sample into a first location in a first register;
(b) loading a second input sample into a second location in said first register;
(c) loading two coefficients into a second register;
(d) computing intermediate results using the contents of the first and second registers;
(e) loading a new input sample into the first location in said first register;
(f) computing intermediate results using the contents of the first and second registers;
(g) repeating steps (b) - (f) for L iterations to provide two output samples; and
(h) repeating steps (a) - (g) for M/2 iterations to provide M output samples.