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BeiDou B1C: Enable sum-product algorithm in LDPC decoder

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This reduces minimum CN0 for stable telemetry decoding from ~28 dB*Hz to
~21 dB*Hz.

Signed-off-by: Vladislav P <vladisslav2011@gmail.com>
This commit is contained in:
Vladislav P
2026-09-29 23:27:47 +03:00
parent 87b9c7235b
commit b24f930abc
1 changed files with 4 additions and 4 deletions
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src/core/system_parameters/beidou_cnav1_ldpc.cc
+4 -4
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@@ -75,23 +75,23 @@ const BeidouCnav1LdpcGraph& beidou_cnav1_ldpc_graph_88_44()
bool beidou_cnav1_ldpc_decode_200_100(const float* symbol_llr, int32_t num_bits, uint8_t* info_bits600)
{
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_200_100(), symbol_llr, num_bits, info_bits600, nullptr);
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_200_100(), symbol_llr, num_bits, info_bits600, nullptr, true);
}
bool beidou_cnav1_ldpc_decode_88_44(const float* symbol_llr, int32_t num_bits, uint8_t* info_bits264)
{
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_88_44(), symbol_llr, num_bits, info_bits264, nullptr);
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_88_44(), symbol_llr, num_bits, info_bits264, nullptr, true);
}
bool beidou_cnav1_ldpc_decode_200_100_codeword(const float* symbol_llr, int32_t num_bits, uint8_t* codeword_bits1200)
{
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_200_100(), symbol_llr, num_bits, nullptr, codeword_bits1200);
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_200_100(), symbol_llr, num_bits, nullptr, codeword_bits1200, true);
}
bool beidou_cnav1_ldpc_decode_88_44_codeword(const float* symbol_llr, int32_t num_bits, uint8_t* codeword_bits528)
{
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_88_44(), symbol_llr, num_bits, nullptr, codeword_bits528);
return beidou_ldpc_decode(beidou_cnav1_ldpc_graph_88_44(), symbol_llr, num_bits, nullptr, codeword_bits528, true);
}