X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnuradio-core%2Fsrc%2Fpython%2Fgnuradio%2Fblks2impl%2Fpfb_channelizer.py;fp=gnuradio-core%2Fsrc%2Fpython%2Fgnuradio%2Fblks2impl%2Fpfb_channelizer.py;h=a479ed48ea9a357800fccd03dde273fccc3b69d3;hb=8a9ddbb0675f9bfcc6e03b457fba6c79474a3693;hp=0000000000000000000000000000000000000000;hpb=82d471b9b4a8b389b5da44b19c69c36420828382;p=debian%2Fgnuradio diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/pfb_channelizer.py b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_channelizer.py new file mode 100644 index 00000000..a479ed48 --- /dev/null +++ b/gnuradio-core/src/python/gnuradio/blks2impl/pfb_channelizer.py @@ -0,0 +1,59 @@ +#!/usr/bin/env python +# +# Copyright 2009,2010 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from gnuradio import gr + +class pfb_channelizer_ccf(gr.hier_block2): + ''' + Make a Polyphase Filter channelizer (complex in, complex out, floating-point taps) + + This simplifies the interface by allowing a single input stream to connect to this block. + It will then output a stream for each channel. + ''' + def __init__(self, numchans, taps, oversample_rate=1): + gr.hier_block2.__init__(self, "pfb_channelizer_ccf", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(numchans, numchans, gr.sizeof_gr_complex)) # Output signature + + self._numchans = numchans + self._taps = taps + self._oversample_rate = oversample_rate + + self.s2ss = gr.stream_to_streams(gr.sizeof_gr_complex, self._numchans) + self.pfb = gr.pfb_channelizer_ccf(self._numchans, self._taps, + self._oversample_rate) + self.v2s = gr.vector_to_streams(gr.sizeof_gr_complex, self._numchans) + + self.connect(self, self.s2ss) + + for i in xrange(self._numchans): + self.connect((self.s2ss,i), (self.pfb,i)) + + # Get independent streams from the filterbank and send them out + self.connect(self.pfb, self.v2s) + + for i in xrange(self._numchans): + self.connect((self.v2s,i), (self,i)) + + + +