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Adding tail bits to improve Viterbi decoding + puncture lists fix

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This commit is contained in:
juribeparada
2018-02-01 16:05:36 -03:00
parent 885562539e
commit d4fbc8f7ec
3 changed files with 28 additions and 14 deletions
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19
NXDNUDCH.cpp
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@@ -63,7 +63,8 @@ const unsigned int PUNCTURE_LIST[] = { 3U, 11U, 17U, 25U, 31U, 39U, 45U,
73U, 81U, 87U, 95U, 101U, 109U, 115U, 123U, 129U, 137U,
143U, 151U, 157U, 165U, 171U, 179U, 185U, 193U, 199U, 207U,
213U, 221U, 227U, 235U, 241U, 249U, 255U, 263U, 269U, 277U,
283U, 291U, 297U, 305U, 311U, 319U, 325U, 333U, 339U, 347U };
283U, 291U, 297U, 305U, 311U, 319U, 325U, 333U, 339U, 347U,
353U, 361U, 367U, 375U, 381U, 389U, 395U, 403U };
const unsigned char BIT_MASK_TABLE[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U };
@@ -73,14 +74,14 @@ const unsigned char BIT_MASK_TABLE[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04
CNXDNUDCH::CNXDNUDCH(const CNXDNUDCH& udch) :
m_data(NULL)
{
m_data = new unsigned char[23U + 2U];
::memcpy(m_data, udch.m_data, 23U + 2U);
m_data = new unsigned char[23U + 3U];
::memcpy(m_data, udch.m_data, 23U + 3U);
}
CNXDNUDCH::CNXDNUDCH() :
m_data(NULL)
{
m_data = new unsigned char[23U + 2U];
m_data = new unsigned char[23U + 3U];
}
CNXDNUDCH::~CNXDNUDCH()
@@ -104,7 +105,7 @@ bool CNXDNUDCH::decode(const unsigned char* data)
CUtils::dump("NXDN, UDCH/FACCH2 de-interleaved", temp1, 44U);
uint8_t temp2[406U];
uint8_t temp2[420U];
unsigned int n = 0U;
unsigned int index = 0U;
@@ -118,18 +119,22 @@ bool CNXDNUDCH::decode(const unsigned char* data)
temp2[n++] = b ? 2U : 0U;
}
for (unsigned int i = 0U; i < 8U; i++) {
temp2[n++] = 0U;
}
CNXDNConvolution conv;
conv.start();
n = 0U;
for (unsigned int i = 0U; i < 203U; i++) {
for (unsigned int i = 0U; i < 207U; i++) {
uint8_t s0 = temp2[n++];
uint8_t s1 = temp2[n++];
conv.decode(s0, s1);
}
conv.chainback(m_data, 199U);
conv.chainback(m_data, 203U);
CUtils::dump("NXDN, UDCH/FACCH2 decoded", m_data, 25U);