3 # Copyright 2007 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, usrp, eng_notation
24 from usrp_source import usrp_source_c
27 n2s = eng_notation.num_to_str
29 class sounder_rx(gr.hier_block2):
31 Creates a channel sounder receiver block with the given parameters.
34 def __init__(self, chip_rate, degree, verbose):
36 # Call hierarchical block constructor
37 # Top-level blocks have no inputs or outputs
38 gr.hier_block2.__init__(self,
39 "sounder_rx", # Block typename
40 gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
41 gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
44 self._chip_rate = chip_rate
45 self._verbose = verbose
46 self._length = 2**self._degree-1
47 self._rep_rate = self._chip_rate/float(self._length)
50 print "Using PN sequence of degree", self._degree, "length", self._length
51 print "Sequence repetition rate is", n2s(self._rep_rate), "per sec"
53 self.connect(self, gr.pn_correlator_cc(self._degree), self)