extrinsic):
noisy_seq = helpers.multiplexed(systematic, code)
llrs = maximum_a_posteriori(lookup_table, noisy_seq, channel_reliability,
True, extrinsic)
extrinsic_out = [llr - extr - channel_reliability * syst for llr, extr, syst in izip(llrs, extrinsic, systematic)]
return llrs, extrinsic_out
if __name__ == '__main__': # pragma: no cover
rsc_table = {
0: {0: ((0, 0), 0), 1: ((1, 1), 2)},
1: {0: ((0, 0), 2), 1: ((1, 1), 0)},
2: {0: ((0, 1), 3), 1: ((1, 0), 1)},
3: {0: ((0, 1), 1), 1: ((1, 0), 3)},
}
permutation = range(9, -1, -1)
il = interleave.Interleaver(permutation)
ie = encode.RscEncoder(rsc_table)
turbo_encoder = encode.TurboEncoder(il, ie)
data = map(int, "0000000001")
encoded = turbo_encoder.encode_sequence(data)
modulated = list(helpers.modulaten(encoded))
noisy = list(channel.transmit_awgn(modulated, 0.3))
decoded = turbo_decode(noisy, rsc_table, il, 10, 2)
print data
print decoded
"decoder_func": pass_decode,
"ebn0s": EBN0S,
"repeat_count": COUNT,
},
{
"description": "MAP",
"frame_length": FRAME_LEN,
"encoder": encode.ConvoEncoder(lookup_tables.abrantes_convo213),
"decoder_func": map_decode,
"ebn0s": EBN0S,
"repeat_count": COUNT,
},
{
"description": "Turbo (1 iteration)",
"frame_length": FRAME_LEN,
"encoder": encode.TurboEncoder(interleaver, encode.RscEncoder(lookup_tables.gzl_rsc)),
"decoder_func": turbo_decode1,
"ebn0s": EBN0S,
"repeat_count": COUNT,
},
{
"description": "Turbo (2 iterations)",
"frame_length": FRAME_LEN,
"encoder": encode.TurboEncoder(interleaver, encode.RscEncoder(lookup_tables.gzl_rsc)),
"decoder_func": make_turbo_decode(2),
"ebn0s": EBN0S,
"repeat_count": COUNT,
},
{
"description": "Turbo (4 iterations)",
"frame_length": FRAME_LEN,
# rel = ebn0 * 2
return decode.turbo_decode(sequence, table, interleaver, k, rel)
return turbo_decode
if __name__ == '__main__':
configurations = [
{
"description":
"jordan_nichols (2, slightly random)",
"frame_length":
LENGTH,
"encoder":
encode.TurboEncoder(
interleave.Interleaver(make_permutation(LENGTH)),
encode.RscEncoder(lookup_tables.jordan_nichols_rsc)),
"decoder_func":
make_turbo_decode(2, lookup_tables.jordan_nichols_rsc,
interleave.Interleaver(
make_permutation(LENGTH))),
"ebn0s":
EBN0S,
"repeat_count": [10, 10],
},
{
"description":
"jordan_nichols_rsc (2, random)",
"frame_length":
LENGTH,
"encoder":
configurations = [
{
"description": "Uncoded (10k frame)",
"frame_length": LENGTH,
"encoder": encode.PassEncoder(),
"decoder_func": pass_decode,
"ebn0s": EBN0S,
"repeat_count": [10] * len(EBN0S),
},
{
"description":
"gzl212 (block; 4)",
"frame_length":
LENGTH,
"encoder":
encode.TurboEncoder(interleave.BlockInterleaver(50, 20),
encode.RscEncoder(lookup_tables.gzl_rsc212)),
"decoder_func":
make_turbo_decode(4, lookup_tables.gzl_rsc,
interleave.BlockInterleaver(50, 20)),
"ebn0s":
EBN0S,
"repeat_count":
R,
},
{
"description":
"gzl213 (block; 4)",
"frame_length":
LENGTH,
"encoder":
encode.TurboEncoder(interleave.BlockInterleaver(50, 20),
# rel = ebn0 * 2
return decode.turbo_decode(sequence, table, interleaver, k, rel)
return turbo_decode
if __name__ == '__main__':
configurations = [
{
"description":
"gzl_rsc (almost none)",
"frame_length":
LENGTH,
"encoder":
encode.TurboEncoder(
interleave.Interleaver(make_permutation(LENGTH)),
encode.RscEncoder(lookup_tables.gzl_rsc)),
"decoder_func":
make_turbo_decode(2, lookup_tables.gzl_rsc,
interleave.Interleaver(
make_permutation(LENGTH))),
"ebn0s":
EBN0S,
"repeat_count": [10, 10, 10, 10, 100],
},
{
"description":
"gzl_rsc (random)",
"frame_length":
LENGTH,
"encoder":