Ah, sorry for not hitting reply-all. Yeah, I tried firdes and figured I was missing something as is usually the case. Thanks again,
philip On Wed, Apr 6, 2016 at 8:24 PM, Kevin Reid <kpr...@switchb.org> wrote: > On Apr 6, 2016, at 20:14, Philip Hahn <hah...@gmail.com> wrote: > > > Related question: I'm having trouble notch negative frequencies. I > understand it needs to be a complex->complex with complex taps but most of > the filter blocks don't seem to support this. In my case a band reject > filter is what I'm looking for to remove spurious noise. I guess the answer > is to frequency xlate, filter and then frequency xlate back? > > This is just a limitation in some of the canned blocks, not in GNU Radio > itself. Instead of picking a 'band reject filter' block, pick the 'FIR > Filter' block (either the decimating or interpolating type, doesn't > matter), and in the Taps field insert a call to firdes -- > > Huh. firdes doesn't have a complex band reject function. Well, you can use > gnuradio.filter.firdes.complex_band_pass and apply standard techniques to > turn the result into a band-reject filter: see > http://www.dspguide.com/ch14/5.htm if you need info. > > > thank you Kevin, > > Please make sure to “reply all” (include the mailing list in your replies) > so other people can follow the discussion and offer advice. > > -- > Kevin Reid <http://switchb.org/kpreid/> > >
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