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#!/usr/bin/env python
#
# Copyright 2013 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, gr_unittest
import digital_swig as digital
class test_simple_correlator(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_00(self):
expected_result = (
0x00, 0x11, 0x22, 0x33,
0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb,
0xcc, 0xdd, 0xee, 0xff)
# Filter taps to expand the data to oversample by 8
# Just using a RRC for some basic filter shape
taps = gr.firdes.root_raised_cosine(8, 8, 1.0, 0.5, 21)
src = gr.vector_source_b(expected_result)
frame = digital.simple_framer(4)
unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST)
expand = gr.interp_fir_filter_fff(8, taps)
b2f = gr.char_to_float()
mult2 = gr.multiply_const_ff(2)
sub1 = gr.add_const_ff(-1)
op = digital.simple_correlator(4)
dst = gr.vector_sink_b()
self.tb.connect(src, frame, unpack, b2f, mult2, sub1, expand)
self.tb.connect(expand, op, dst)
self.tb.run()
result_data = dst.data()
self.assertEqual(expected_result, result_data)
if __name__ == '__main__':
gr_unittest.run(test_simple_correlator, "test_simple_correlator.xml")
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