Method of realizing high order recursive digital filter using low step filters
Xiu Wang · 1999
A method of realizing high order recursive digital filter using low step filters is approached, the characteristic is partitioning the overall filter into a set of parallel subfilters. The designing step is as follows: at first deciding on the number of subfilters and their orders, then allocating pole for any given subfilter, and partitioning the filter into subfilters,at last synthesising the subfilters. The high order recursive digital filter designed by this method has reduced more quantisation noise and improved more tolerance to quantisation than their classical counterparts. Therefore this method is particularly useful when the filter order is greater than 50.