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Fix BeiDou decoding

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This commit is contained in:
Carles Fernandez 2019-09-18 21:46:47 +02:00
parent 553df7db6a
commit 17cceabd52
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GPG Key ID: 4C583C52B0C3877D
2 changed files with 8 additions and 4 deletions
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6
src/algorithms/telemetry_decoder/gnuradio_blocks/beidou_b1i_telemetry_decoder_gs.cc
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@ -132,7 +132,7 @@ void beidou_b1i_telemetry_decoder_gs::decode_bch15_11_01(const int32_t *bits, st
{
int32_t bit;
int32_t err;
std::array<int32_t, 4> reg{1, 1, 1, 1};
std::array<int32_t, 4> reg{-1, -1, -1, -1};
const std::array<int32_t, 15> errind{14, 13, 10, 12, 6, 9, 4, 11, 0, 5, 7, 8, 1, 3, 2};
for (uint32_t i = 0; i < 15; i++)
@ -150,11 +150,13 @@ void beidou_b1i_telemetry_decoder_gs::decode_bch15_11_01(const int32_t *bits, st
reg[1] *= bit;
}
for (int i = 0; i < 4; ++i)
for (uint32_t i = 0; i < 4; ++i)
{
reg[i] = (reg[i] + 1) / 2;
}
err = reg[0] + reg[1] * 2 + reg[2] * 4 + reg[3] * 8;
if (err > 0 and err < 16)
{
decbits[errind[err - 1]] *= -1;

6
src/algorithms/telemetry_decoder/gnuradio_blocks/beidou_b3i_telemetry_decoder_gs.cc
View File

@ -133,7 +133,7 @@ void beidou_b3i_telemetry_decoder_gs::decode_bch15_11_01(const int32_t *bits,
{
int32_t bit;
int32_t err;
std::array<int32_t, 4> reg{1, 1, 1, 1};
std::array<int32_t, 4> reg{-1, -1, -1, -1};
const std::array<int32_t, 15> errind{14, 13, 10, 12, 6, 9, 4, 11, 0, 5, 7, 8, 1, 3, 2};
for (uint32_t i = 0; i < 15; i++)
@ -151,11 +151,13 @@ void beidou_b3i_telemetry_decoder_gs::decode_bch15_11_01(const int32_t *bits,
reg[1] *= bit;
}
for (int i = 0; i < 4; ++i)
for (uint32_t i = 0; i < 4; ++i)
{
reg[i] = (reg[i] + 1) / 2;
}
err = reg[0] + reg[1] * 2 + reg[2] * 4 + reg[3] * 8;
if (err > 0 and err < 16)
{
decbits[errind[err - 1]] *= -1;