Thanks, very useful information. 8 coefficients sounds very realistic. I got optimal results more or less regularly for a 16-tap FIR, but I think that's where it ends. An alternative I'll try - not because of real need but curiosity - is some Round-Robin scheme for iterative reweighted least-squares in a cascade of filters. The idea is that for small weight changes, each filter should 'attract' the weight at frequencies where the LS solver can improve more easily than the other stages. But, whether this works, remains to be seen.
IIR filter design, Matlab and a genetic algorithm
Started by ●March 19, 2008
Reply by ●August 8, 20122012-08-08