On Mon, Jan 14, 2013 at 12:27:25AM -0800, luca wrote: > Hi Tom, > thank you ..but I'm sorry ..I'm not convinced... ;) > I try to replace the two terms by usign just one of them.. > well if I use rrctaps for both, the signal is not tracked, while if I use > the firdes.root_raised_cosine(32, 32, 1.0, 0.35, 44*32), it works but it is > noisier.
Luca, both blocks have different sampling rates at the input. This is reflected in the taps calculation. Otherwise, they're identical. Creating taps for PFB blocks is not exactly the same as doing so for their non-PFB counterparts. You should definitely read this: http://gnuradio.org/doc/doxygen/page_pfb.html http://gnuradio.org/doc/doxygen/classgr__pfb__arb__resampler__ccf.html These might also help: http://gnuradio.org/doc/doxygen/classgr__firdes.html http://gnuradio.org/doc/doxygen/classgr__pfb__clock__sync__ccf.html MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association
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