[SciPy-User] [SciPy-user] least-square filter design

Neal Becker ndbecker2@gmail....
Sun Nov 1 07:26:18 CST 2009

Tom K. wrote:

> Neal Becker wrote:
>> Anyone have code for least square (minimum mean square error) FIR filter
>> design?
> Could you be a little more specific?  scipy.signal.firwin almost designs a
> least square low pass FIR filter if you use a rectangular window (I say
> almost because like other packages the filter's response is normalized to
> unity at DC so technically it is not least squares although the difference
> is slight and decreases with increasing filter order).
> Do you need a transition band?  What type of FIR filter: lowpass,
> highpass,
> bandpass, bandstop, or multiband?  Are discrete samples OK, or do you need
> a
> continuous band (or set of bands)?  Which type of filter - is symmetric
> OK, or do you need antisymmetric?
> Or, are you talking about an adaptive filter?

I'm looking for something like this: 

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