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ldpc check based on crc

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This commit is contained in:
laurent
2023-06-12 10:24:57 +02:00
parent 3645c96c09
commit 615324294b
16 changed files with 222 additions and 408 deletions
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openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_decoder.c
+94 -135
View File
@@ -107,13 +107,9 @@
#endif
#define NR_LDPC_ENABLE_PARITY_CHECK
//#define NR_LDPC_PROFILER_DETAIL
//#define NR_LDPC_ENABLE_PARITY_CHECK
//#define NR_LDPC_PROFILER_DETAIL(a) a
#define NR_LDPC_PROFILER_DETAIL(a)
#ifdef NR_LDPC_DEBUG_MODE
#include "nrLDPC_tools/nrLDPC_debug.h"
@@ -134,18 +130,19 @@ int32_t nrLDPC_decod(t_nrLDPC_dec_params* p_decParams,
t_nrLDPC_time_stats* p_profiler,
decode_abort_t* ab)
{
uint32_t numLLR;
uint32_t numIter = 0;
t_nrLDPC_lut lut;
t_nrLDPC_lut* p_lut = &lut;
uint32_t numLLR;
t_nrLDPC_lut lut;
t_nrLDPC_lut* p_lut = &lut;
// Initialize decoder core(s) with correct LUTs
numLLR = nrLDPC_init(p_decParams, p_lut);
// Initialize decoder core(s) with correct LUTs
numLLR = nrLDPC_init(p_decParams, p_lut);
// Launch LDPC decoder core for one segment
numIter = nrLDPC_decoder_core(p_llr, p_out, numLLR, p_lut, p_decParams, p_profiler, ab);
if (numIter > p_decParams->numMaxIter)
set_abort(ab, true);
// Launch LDPC decoder core for one segment
int numIter = nrLDPC_decoder_core(p_llr, p_out, numLLR, p_lut, p_decParams, p_profiler, ab);
if (numIter > p_decParams->numMaxIter) {
LOG_D(PHY, "set abort: %d, %d\n", numIter, p_decParams->numMaxIter);
set_abort(ab, true);
}
return numIter;
}
@@ -179,48 +176,26 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
int8_t bnProcBuf[NR_LDPC_SIZE_BN_PROC_BUF] __attribute__ ((aligned(64))) = {0};
int8_t bnProcBufRes[NR_LDPC_SIZE_BN_PROC_BUF] __attribute__ ((aligned(64))) = {0};
int8_t llrRes[NR_LDPC_MAX_NUM_LLR] __attribute__ ((aligned(64))) = {0};
int8_t llrProcBuf[NR_LDPC_MAX_NUM_LLR] __attribute__ ((aligned(64))) = {0};
int8_t llrOut[NR_LDPC_MAX_NUM_LLR] __attribute__ ((aligned(64))) = {0};
int8_t llrProcBuf[NR_LDPC_MAX_NUM_LLR] __attribute__((aligned(64))) = {0};
// Minimum number of iterations is 1
// 0 iterations means hard-decision on input LLRs
uint32_t i = 1;
// Initialize with parity check fail != 0
int32_t pcRes = 1;
int8_t* p_llrOut;
if (outMode == nrLDPC_outMode_LLRINT8)
{
p_llrOut = p_out;
}
else
{
// Use LLR processing buffer as temporary output buffer
p_llrOut = llrOut;
}
// Initialization
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->llr2llrProcBuf);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->llr2llrProcBuf));
nrLDPC_llr2llrProcBuf(p_lut, p_llr, llrProcBuf, Z, BG);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->llr2llrProcBuf);
#endif
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->llr2llrProcBuf));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_initBuffer2File(nrLDPC_buffers_LLR_PROC);
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_LLR_PROC, llrProcBuf);
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->llr2CnProcBuf);
#endif
if (BG == 1) nrLDPC_llr2CnProcBuf_BG1(p_lut, p_llr, cnProcBuf, Z);
else nrLDPC_llr2CnProcBuf_BG2(p_lut, p_llr, cnProcBuf, Z);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->llr2CnProcBuf);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->llr2CnProcBuf));
if (BG == 1)
nrLDPC_llr2CnProcBuf_BG1(p_lut, p_llr, cnProcBuf, Z);
else
nrLDPC_llr2CnProcBuf_BG2(p_lut, p_llr, cnProcBuf, Z);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->llr2CnProcBuf));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_initBuffer2File(nrLDPC_buffers_CN_PROC);
@@ -230,12 +205,10 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
// First iteration
// CN processing
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->cnProc);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->cnProc));
if (BG==1) {
#ifndef UNROLL_CN_PROC
nrLDPC_cnProc_BG1(p_lut, cnProcBuf, cnProcBufRes, Z);
#ifndef UNROLL_CN_PROC
nrLDPC_cnProc_BG1(p_lut, cnProcBuf, cnProcBufRes, Z);
#else
switch (R)
{
@@ -307,23 +280,19 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
}
#endif
}
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->cnProc);
#endif
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->cnProc));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_initBuffer2File(nrLDPC_buffers_CN_PROC_RES);
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_CN_PROC_RES, cnProcBufRes);
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->cn2bnProcBuf);
#endif
if (BG == 1) nrLDPC_cn2bnProcBuf_BG1(p_lut, cnProcBufRes, bnProcBuf, Z);
else nrLDPC_cn2bnProcBuf_BG2(p_lut, cnProcBufRes, bnProcBuf, Z);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->cn2bnProcBuf);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->cn2bnProcBuf));
if (BG == 1)
nrLDPC_cn2bnProcBuf_BG1(p_lut, cnProcBufRes, bnProcBuf, Z);
else
nrLDPC_cn2bnProcBuf_BG2(p_lut, cnProcBufRes, bnProcBuf, Z);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->cn2bnProcBuf));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_initBuffer2File(nrLDPC_buffers_BN_PROC);
@@ -331,10 +300,7 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
#endif
// BN processing
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->bnProcPc);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->bnProcPc));
#ifndef UNROLL_BN_PROC_PC
nrLDPC_bnProcPc(p_lut, bnProcBuf, bnProcBufRes, llrProcBuf, llrRes, Z);
@@ -379,18 +345,14 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
}
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->bnProcPc);
#endif
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->bnProcPc));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_initBuffer2File(nrLDPC_buffers_LLR_RES);
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_LLR_RES, llrRes);
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->bnProc);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->bnProc));
if (BG==1) {
#ifndef UNROLL_BN_PROC
@@ -491,13 +453,16 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
// estimated after only one iteration
// First iteration finished
while ( (i < numMaxIter) && (pcRes != 0) ) {
// Increase iteration counter
i++;
if (check_abort(ab))
return numMaxIter + 2;
// CN processing
uint32_t numIter = 1;
int32_t pcRes = 1; // pcRes is 0 if the ldpc decoder is succesful
while ((numIter <= numMaxIter) && (pcRes != 0)) {
// Increase iteration counter
numIter++;
if (check_abort(ab)) {
numIter = numMaxIter + 2;
break;
}
// CN processing
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->cnProc);
#endif
@@ -593,9 +558,7 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
#endif
// BN Processing
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->bnProcPc);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->bnProcPc));
#ifndef UNROLL_BN_PROC_PC
nrLDPC_bnProcPc(p_lut, bnProcBuf, bnProcBufRes, llrProcBuf, llrRes, Z);
@@ -639,17 +602,13 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
}
}
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->bnProcPc);
#endif
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->bnProcPc));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_LLR_RES, llrRes);
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->bnProc);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->bnProc));
#ifndef UNROLL_BN_PROC
nrLDPC_bnProc(p_lut, bnProcBuf, bnProcBufRes, llrRes, Z);
#else
@@ -717,25 +676,19 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
}
#endif
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->bnProc);
#endif
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->bnProc));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_BN_PROC_RES, bnProcBufRes);
#endif
// BN results to CN processing buffer
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->bn2cnProcBuf);
#endif
if (BG == 1) nrLDPC_bn2cnProcBuf_BG1(p_lut, bnProcBufRes, cnProcBuf, Z);
else nrLDPC_bn2cnProcBuf_BG2(p_lut, bnProcBufRes, cnProcBuf, Z);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->bn2cnProcBuf);
#endif
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->bn2cnProcBuf));
if (BG == 1)
nrLDPC_bn2cnProcBuf_BG1(p_lut, bnProcBufRes, cnProcBuf, Z);
else
nrLDPC_bn2cnProcBuf_BG2(p_lut, bnProcBufRes, cnProcBuf, Z);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->bn2cnProcBuf));
#ifdef NR_LDPC_DEBUG_MODE
nrLDPC_debug_writeBuffer2File(nrLDPC_buffers_CN_PROC, cnProcBuf);
@@ -743,40 +696,46 @@ static inline uint32_t nrLDPC_decoder_core(int8_t* p_llr,
// Parity Check
#ifdef NR_LDPC_ENABLE_PARITY_CHECK
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->cnProcPc);
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->cnProcPc));
if (BG == 1)
pcRes = nrLDPC_cnProcPc_BG1(p_lut, cnProcBuf, cnProcBufRes, Z);
else
pcRes = nrLDPC_cnProcPc_BG2(p_lut, cnProcBuf, cnProcBufRes, Z);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->cnProcPc));
#else
if (numIter > 2) {
int8_t llrOut[NR_LDPC_MAX_NUM_LLR] __attribute__((aligned(64))) = {0};
int8_t* p_llrOut = outMode == nrLDPC_outMode_LLRINT8 ? p_out : llrOut;
nrLDPC_llrRes2llrOut(p_lut, p_llrOut, llrRes, Z, BG);
if (outMode == nrLDPC_outMode_BIT)
nrLDPC_llr2bitPacked(p_out, p_llrOut, numLLR);
else // if (outMode == nrLDPC_outMode_BITINT8)
nrLDPC_llr2bit(p_out, p_llrOut, numLLR);
if (check_crc((uint8_t*)p_out, p_decParams->block_length, p_decParams->crc_type)) {
LOG_D(PHY, "Segment CRC OK, exiting LDPC decoder\n");
break;
}
}
#endif
if (BG == 1) pcRes = nrLDPC_cnProcPc_BG1(p_lut, cnProcBuf, cnProcBufRes, Z);
else pcRes = nrLDPC_cnProcPc_BG2(p_lut, cnProcBuf, cnProcBufRes, Z);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->cnProcPc);
}
#ifdef NR_LDPC_ENABLE_PARITY_CHECK
{
int8_t llrOut[NR_LDPC_MAX_NUM_LLR] __attribute__((aligned(64))) = {0};
int8_t* p_llrOut = outMode == nrLDPC_outMode_LLRINT8 ? p_out : llrOut;
// Assign results from processing buffer to output
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->llrRes2llrOut));
nrLDPC_llrRes2llrOut(p_lut, p_llrOut, llrRes, Z, BG);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->llrRes2llrOut));
// Hard-decision
NR_LDPC_PROFILER_DETAIL(start_meas(&p_profiler->llr2bit));
if (outMode == nrLDPC_outMode_BIT)
nrLDPC_llr2bitPacked(p_out, p_llrOut, numLLR);
else // if (outMode == nrLDPC_outMode_BITINT8)
nrLDPC_llr2bit(p_out, p_llrOut, numLLR);
NR_LDPC_PROFILER_DETAIL(stop_meas(&p_profiler->llr2bit));
}
#endif
#endif
} // end while
// Last iteration
if (pcRes != 0) i++;
// Assign results from processing buffer to output
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->llrRes2llrOut);
#endif
nrLDPC_llrRes2llrOut(p_lut, p_llrOut, llrRes, Z, BG);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->llrRes2llrOut);
#endif
// Hard-decision
#ifdef NR_LDPC_PROFILER_DETAIL
start_meas(&p_profiler->llr2bit);
#endif
if (outMode == nrLDPC_outMode_BIT) nrLDPC_llr2bitPacked(p_out, p_llrOut, numLLR);
else //if (outMode == nrLDPC_outMode_BITINT8)
nrLDPC_llr2bit(p_out, p_llrOut, numLLR);
#ifdef NR_LDPC_PROFILER_DETAIL
stop_meas(&p_profiler->llr2bit);
#endif
return i;
return numIter;
}