Forum: GNU Radio Setting taps for analysis_filterbank

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558c40b97bd1af8d912424757714bda9?d=identicon&s=25 Marcus D. Leech (Guest)
on 2009-02-17 19:54
(Received via mailing list)
How are the taps supposed to be set for Analysis Filterbank,
particularly in GRC?

--
Marcus Leech
Principal Investigator, Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
998dbc3ac73d5487c59c0ee0f5baeeb1?d=identicon&s=25 Sebastiaan Heunis (Guest)
on 2009-02-17 20:21
(Received via mailing list)
Marcus

I was wondering about the same thing earlier this year.  Have a look
at gr-pager/src/usrp_flex_band.py.  Some of the code:

taps = gr.firdes.low_pass(1.0,
                                  1.0,
                                  1.0/40.0*0.4,
                                  1.0/40.0*0.1,
                                  gr.firdes.WIN_HANN)

        if options.verbose:
            print "Channel filter has", len(taps), "taps"

        bank = blks2.analysis_filterbank(40, taps)
        self.connect(self.src, bank)

Just remember to connect every output of the filterbank to at least
something.  Otherwise none of the outputs output correct data.


Sebastiaan
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