Re: non symmetric filter using park mcclelans
- From: robert bristow-johnson <rbj@xxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 14 Jun 2008 23:28:13 -0700 (PDT)
On Jun 12, 2:48 pm, Vladimir Vassilevsky <antispam_bo...@xxxxxxxxxxx>
wrote:
Eric Jacobsen wrote:
Anybody know how to implement non symmetric filter with park
mcclelans.
http://www.dspguru.com/comp.dsp/tricks/dsn/nlp_fir.htm
Designing Re and Im parts separately is the neat trick, however the
resultant filter will be neither equiripple nor optimal.
oh, come on, Vlad! there's the friggin' triangle inequality. so
define your ripple tolerance for the Re and Im parts to be 1/2 or
maybe 1/sqrt(2) of the ripple in the mag. so it's not quite optimal.
it at least can be designed to restrain the max ripple error to a
known quantity. this nit is too small to pick.
r b-j
.
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