3 # Copyright 2009,2010 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr
25 class pfb_channelizer_ccf(gr.hier_block2):
27 Make a Polyphase Filter channelizer (complex in, complex out, floating-point taps)
29 This simplifies the interface by allowing a single input stream to connect to this block.
30 It will then output a stream for each channel.
32 def __init__(self, numchans, taps, oversample_rate=1):
33 gr.hier_block2.__init__(self, "pfb_channelizer_ccf",
34 gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
35 gr.io_signature(numchans, numchans, gr.sizeof_gr_complex)) # Output signature
37 self._numchans = numchans
39 self._oversample_rate = oversample_rate
41 self.s2ss = gr.stream_to_streams(gr.sizeof_gr_complex, self._numchans)
42 self.pfb = gr.pfb_channelizer_ccf(self._numchans, self._taps,
43 self._oversample_rate)
44 self.v2s = gr.vector_to_streams(gr.sizeof_gr_complex, self._numchans)
46 self.connect(self, self.s2ss)
48 for i in xrange(self._numchans):
49 self.connect((self.s2ss,i), (self.pfb,i))
51 # Get independent streams from the filterbank and send them out
52 self.connect(self.pfb, self.v2s)
54 for i in xrange(self._numchans):
55 self.connect((self.v2s,i), (self,i))