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#!/usr/bin/env python
# Copyright 2012,2013 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
try: import pmt
except: from gruel import pmt
import digital_swig as digital
import blocks_swig as blocks
class qa_digital_carrier_allocator_cvc (gr_unittest.TestCase):
def setUp (self):
self.tb = gr.top_block ()
def tearDown (self):
self.tb = None
def test_001_t (self):
"""
pretty simple
"""
fft_len = 6
tx_symbols = (1, 2, 3)
pilot_symbols = ((1j,),)
occupied_carriers = ((0, 1, 2),)
pilot_carriers = ((3,),)
expected_result = (1, 2, 3, 1j, 0, 0)
tag_name = "len"
tag = gr.gr_tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(len(tx_symbols))
src = blocks.vector_source_c(tx_symbols, False, 1, (tag,))
alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
occupied_carriers,
pilot_carriers,
pilot_symbols,
tag_name)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, alloc, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
def test_002_t (self):
"""
same, but using negative carrier indices
"""
fft_len = 6
tx_symbols = (1, 2, 3)
pilot_symbols = ((1j,),)
occupied_carriers = ((-1, 1, 2),)
pilot_carriers = ((3,),)
expected_result = (0, 2, 3, 1j, 0, 1)
tag_name = "len"
tag = gr.gr_tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(len(tx_symbols))
src = blocks.vector_source_c(tx_symbols, False, 1, (tag,))
alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
occupied_carriers,
pilot_carriers,
pilot_symbols,
tag_name)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, alloc, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
def test_003_t (self):
"""
more advanced:
- 6 symbols per carrier
- 2 pilots per carrier
- have enough data for nearly 3 OFDM symbols
- send that twice
- add some random tags
"""
tx_symbols = range(1, 16); # 15 symbols
pilot_symbols = ((1j, 2j), (3j, 4j))
occupied_carriers = ((1, 3, 4, 11, 12, 14), (1, 2, 4, 11, 13, 14),)
pilot_carriers = ((2, 13), (3, 12))
expected_result = (0, 1, 1j, 2, 3, 0, 0, 0, 0, 0, 0, 4, 5, 2j, 6, 0,
0, 7, 8, 3j, 9, 0, 0, 0, 0, 0, 0, 10, 4j, 11, 12, 0,
0, 13, 1j, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 2j, 0, 0)
fft_len = 16
tag_name = "len"
tag1 = gr.gr_tag_t()
tag1.offset = 0
tag1.key = pmt.string_to_symbol(tag_name)
tag1.value = pmt.from_long(len(tx_symbols))
tag2 = gr.gr_tag_t()
tag2.offset = len(tx_symbols)
tag2.key = pmt.string_to_symbol(tag_name)
tag2.value = pmt.from_long(len(tx_symbols))
testtag1 = gr.gr_tag_t()
testtag1.offset = 0
testtag1.key = pmt.string_to_symbol('tag1')
testtag1.value = pmt.from_long(0)
testtag2 = gr.gr_tag_t()
testtag2.offset = 7 # On the 2nd OFDM symbol
testtag2.key = pmt.string_to_symbol('tag2')
testtag2.value = pmt.from_long(0)
testtag3 = gr.gr_tag_t()
testtag3.offset = len(tx_symbols)+1 # First OFDM symbol of packet 2
testtag3.key = pmt.string_to_symbol('tag3')
testtag3.value = pmt.from_long(0)
testtag4 = gr.gr_tag_t()
testtag4.offset = 2*len(tx_symbols)-1 # Last OFDM symbol of packet 2
testtag4.key = pmt.string_to_symbol('tag4')
testtag4.value = pmt.from_long(0)
src = blocks.vector_source_c(tx_symbols * 2, False, 1,
(tag1, tag2, testtag1, testtag2, testtag3, testtag4))
alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
occupied_carriers,
pilot_carriers,
pilot_symbols,
tag_name)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, alloc, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result * 2)
tags_found = {'tag1': False, 'tag2': False, 'tag3': False, 'tag4': False}
correct_offsets = {'tag1': 0, 'tag2': 1, 'tag3': 3, 'tag4': 5}
for tag in sink.tags():
key = pmt.symbol_to_string(tag.key)
if key in tags_found.keys():
tags_found[key] = True
self.assertEqual(correct_offsets[key], tag.offset)
if key == tag_name:
self.assertTrue(tag.offset == 0 or tag.offset == 3)
self.assertTrue(pmt.to_long(tag.value) == 3)
self.assertTrue(all(tags_found.values()))
if __name__ == '__main__':
gr_unittest.run(qa_digital_carrier_allocator_cvc, "qa_digital_carrier_allocator_cvc.xml")
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