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srsLTE: extend viterbi test

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master
Xavier Arteaga 5 years ago committed by Andre Puschmann
parent d045213fb9
commit bca5d1a95a
8 changed files with 201 additions and 129 deletions
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2
lib/include/srslte/phy/utils/bit.h
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@ -83,7 +83,7 @@ SRSLTE_API void srslte_bit_unpack(uint32_t value, uint8_t** bits, int nof_bits);
SRSLTE_API void srslte_bit_fprint(FILE* stream, uint8_t* bits, int nof_bits);
SRSLTE_API uint32_t srslte_bit_diff(uint8_t* x, uint8_t* y, int nbits);
SRSLTE_API uint32_t srslte_bit_diff(const uint8_t* x, const uint8_t* y, int nbits);
SRSLTE_API uint32_t srslte_bit_count(uint32_t n);

26
lib/include/srslte/phy/utils/vector.h
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@ -82,6 +82,10 @@ SRSLTE_API cf_t srslte_vec_acc_cc(const cf_t* x, const uint32_t len);
SRSLTE_API void* srslte_vec_malloc(uint32_t size);
SRSLTE_API cf_t* srslte_vec_cf_malloc(uint32_t size);
SRSLTE_API float* srslte_vec_f_malloc(uint32_t size);
SRSLTE_API int16_t* srslte_vec_i16_malloc(uint32_t nsamples);
SRSLTE_API uint16_t* srslte_vec_u16_malloc(uint32_t nsamples);
SRSLTE_API int8_t* srslte_vec_i8_malloc(uint32_t nsamples);
SRSLTE_API uint8_t* srslte_vec_u8_malloc(uint32_t nsamples);
SRSLTE_API void* srslte_vec_realloc(void* ptr, uint32_t old_size, uint32_t new_size);
@ -179,17 +183,27 @@ SRSLTE_API void srslte_vec_quant_fuc(const float* in,
uint8_t* out,
const float gain,
const float offset,
const float clip,
const uint8_t clip,
const uint32_t len);
SRSLTE_API void srslte_vec_quant_fus(const float* in,
uint16_t* out,
const float gain,
const float offset,
const uint16_t clip,
const uint32_t len);
SRSLTE_API void srslte_vec_quant_fus(float* in, uint16_t* out, float gain, float offset, float clip, uint32_t len);
SRSLTE_API void srslte_vec_quant_suc(const int16_t* in,
uint8_t* out,
const float gain,
const int16_t offset,
const int16_t clip,
const float offset,
const uint8_t clip,
const uint32_t len);
SRSLTE_API void srslte_vec_quant_sus(const int16_t* in,
uint16_t* out,
const float gain,
const float offset,
const uint16_t clip,
const uint32_t len);
SRSLTE_API void
srslte_vec_quant_sus(const int16_t* in, uint16_t* out, const float gain, const int16_t offset, const uint32_t len);
/* magnitude of each vector element */
SRSLTE_API void srslte_vec_abs_cf(const cf_t* x, float* abs, const uint32_t len);
SRSLTE_API void srslte_vec_abs_square_cf(const cf_t* x, float* abs_square, const uint32_t len);

2
lib/src/phy/fec/test/CMakeLists.txt
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@ -67,6 +67,8 @@ add_test(viterbi_1000_2 viterbi_test -n 100 -s 1 -l 1000 -t -e 2.0)
add_test(viterbi_1000_3 viterbi_test -n 100 -s 1 -l 1000 -t -e 3.0)
add_test(viterbi_1000_4 viterbi_test -n 100 -s 1 -l 1000 -t -e 4.5)
add_test(viterbi_56_4 viterbi_test -n 1000 -s 1 -l 56 -t -e 4.5)
########################################################################
# CRC TEST
########################################################################

172
lib/src/phy/fec/test/viterbi_test.c
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@ -32,16 +32,10 @@
#include "viterbi_test.h"
#define VITERBI_16
#ifndef LV_HAVE_AVX2
#undef VITERBI_16
#endif
int frame_length = 1000, nof_frames = 256;
float ebno_db = 100.0;
uint32_t seed = 0;
bool tail_biting = false;
static int frame_length = 1000, nof_frames = 256;
static float ebno_db = 100.0;
static uint32_t seed = 0;
static bool tail_biting = false;
#define SNR_POINTS 10
#define SNR_MIN 0.0
@ -84,19 +78,43 @@ void parse_args(int argc, char** argv)
}
}
#define VITERBI_TEST(FUNC, DEC, LLR, NOF_ERRORS) \
do { \
struct timeval t[3] = {}; \
int M = 1; \
gettimeofday(&t[1], NULL); \
for (uint32_t m = 0; m < M && NOF_ERRORS >= 0; m++) { \
int ret = FUNC(&DEC, LLR, data_rx, frame_length); \
if (ret < SRSLTE_SUCCESS) { \
NOF_ERRORS = ret; \
} \
} \
gettimeofday(&t[2], NULL); \
get_time_interval(t); \
/*printf("-- "#FUNC" took\t\t%.1f us\n", (float) t[0].tv_sec * 1e6f + (float) t[0].tv_usec/M);*/ \
if (NOF_ERRORS >= 0) { \
NOF_ERRORS += srslte_bit_diff(data_tx, data_rx, frame_length); \
} \
} while (0)
//#define TEST_SSE
int main(int argc, char** argv)
{
int frame_cnt;
float* llr;
uint16_t* llr_s;
uint8_t* llr_c;
uint8_t * data_tx, *data_rx, *data_rx2, *symbols;
int j;
int frame_cnt = 0;
float* llr = NULL;
uint16_t* llr_us = NULL;
int16_t* llr_s = NULL;
uint8_t* llr_c = NULL;
uint8_t * data_tx, *data_rx, *symbols;
float var[SNR_POINTS], varunc[SNR_POINTS];
int snr_points;
uint32_t errors;
int errors_s = 0;
int errors_us = 0;
int errors_c = 0;
int errors_f = 0;
int errors_sse = 0;
#ifdef TEST_SSE
uint32_t errors2;
srslte_viterbi_t dec_sse;
#endif
srslte_viterbi_t dec;
@ -130,40 +148,39 @@ int main(int argc, char** argv)
printf(" EbNo: %.2f\n", ebno_db);
}
data_tx = malloc(frame_length * sizeof(uint8_t));
data_tx = srslte_vec_u8_malloc(frame_length);
if (!data_tx) {
perror("malloc");
exit(-1);
}
data_rx = malloc(frame_length * sizeof(uint8_t));
data_rx = srslte_vec_u8_malloc(frame_length);
if (!data_rx) {
perror("malloc");
exit(-1);
}
data_rx2 = malloc(frame_length * sizeof(uint8_t));
if (!data_rx2) {
perror("malloc");
exit(-1);
}
symbols = malloc(coded_length * sizeof(uint8_t));
symbols = srslte_vec_u8_malloc(coded_length);
if (!symbols) {
perror("malloc");
exit(-1);
}
llr = malloc(coded_length * sizeof(float));
llr = srslte_vec_f_malloc(coded_length);
if (!llr) {
perror("malloc");
exit(-1);
}
llr_s = malloc(2 * coded_length * sizeof(uint16_t));
llr_s = srslte_vec_i16_malloc(2 * coded_length);
if (!llr_s) {
perror("malloc");
exit(-1);
}
llr_c = malloc(2 * coded_length * sizeof(uint8_t));
llr_us = srslte_vec_u16_malloc(2 * coded_length);
if (!llr_us) {
perror("malloc");
exit(-1);
}
llr_c = srslte_vec_u8_malloc(2 * coded_length);
if (!llr_c) {
perror("malloc");
exit(-1);
@ -188,21 +205,21 @@ int main(int argc, char** argv)
for (uint32_t i = 0; i < snr_points; i++) {
frame_cnt = 0;
errors = 0;
#ifdef TEST_SSE
errors2 = 0;
#endif
errors_s = 0;
errors_c = 0;
errors_f = 0;
errors_sse = 0;
while (frame_cnt < nof_frames) {
/* generate data_tx */
srslte_random_t random_gen = srslte_random_init(0);
for (j = 0; j < frame_length; j++) {
for (int j = 0; j < frame_length; j++) {
data_tx[j] = srslte_random_uniform_int_dist(random_gen, 0, 1);
}
srslte_random_free(random_gen);
/* uncoded BER */
for (j = 0; j < frame_length; j++) {
for (int j = 0; j < frame_length; j++) {
llr[j] = data_tx[j] ? M_SQRT2 : -M_SQRT2;
}
srslte_ch_awgn_f(llr, llr, varunc[i], frame_length);
@ -210,60 +227,52 @@ int main(int argc, char** argv)
/* coded BER */
srslte_convcoder_encode(&cod, data_tx, symbols, frame_length);
for (j = 0; j < coded_length; j++) {
for (int j = 0; j < coded_length; j++) {
llr[j] = symbols[j] ? M_SQRT2 : -M_SQRT2;
}
srslte_ch_awgn_f(llr, llr, var[i], coded_length);
// srslte_vec_fprint_f(stdout, llr, 100);
srslte_vec_quant_fuc(llr, llr_c, 32, 127.5, 255, coded_length);
srslte_vec_quant_fus(llr, llr_s, 8192, 32767.5, 65535, coded_length);
struct timeval t[3];
gettimeofday(&t[1], NULL);
int M = 1;
for (uint32_t i = 0; i < M; i++) {
#ifdef VITERBI_16
srslte_viterbi_decode_us(&dec, llr_s, data_rx, frame_length);
#else
srslte_viterbi_decode_uc(&dec, llr_c, data_rx, frame_length);
#endif
}
#ifdef TEST_SSE
gettimeofday(&t[2], NULL);
get_time_interval(t);
// printf("Execution time:\t\t%.1f us\n", (float) t[0].tv_usec/M);
gettimeofday(&t[1], NULL);
for (int i = 0; i < M; i++) {
srslte_viterbi_decode_uc(&dec_sse, llr_c, data_rx2, frame_length);
}
gettimeofday(&t[2], NULL);
get_time_interval(t);
// printf("Execution time SIMD:\t%.1f us\n", (float) t[0].tv_usec/M);
#endif
srslte_vec_convert_fi(llr, 1000, llr_s, coded_length);
srslte_vec_quant_fuc(llr, llr_c, 32, INT8_MAX, UINT8_MAX, coded_length);
srslte_vec_quant_fus(llr, llr_us, 8192, INT16_MAX, UINT16_MAX, coded_length);
/* check errors */
errors += srslte_bit_diff(data_tx, data_rx, frame_length);
VITERBI_TEST(srslte_viterbi_decode_s, dec, llr_s, errors_s);
VITERBI_TEST(srslte_viterbi_decode_us, dec, llr_us, errors_us);
VITERBI_TEST(srslte_viterbi_decode_uc, dec, llr_c, errors_c);
VITERBI_TEST(srslte_viterbi_decode_f, dec, llr, errors_f);
#ifdef TEST_SSE
errors2 += srslte_bit_diff(data_tx, data_rx2, frame_length);
VITERBI_TEST(srslte_viterbi_decode_uc, dec_sse, llr_c, errors_sse);
#endif
frame_cnt++;
printf("Eb/No: %3.2f %10d/%d ", SNR_MIN + i * ebno_inc, frame_cnt, nof_frames);
printf("BER: %.2e ", (float)errors / (frame_cnt * frame_length));
printf(" Eb/No: %3.2f %10d/%d ", SNR_MIN + i * ebno_inc, frame_cnt, nof_frames);
if (errors_s >= 0)
printf(" int16 BER: %.2e ", (float)errors_s / (frame_cnt * frame_length));
if (errors_us >= 0)
printf("uint16 BER: %.2e ", (float)errors_us / (frame_cnt * frame_length));
if (errors_c >= 0)
printf("uint8 BER: %.2e ", (float)errors_c / (frame_cnt * frame_length));
if (errors_f >= 0)
printf("float BER: %.2e ", (float)errors_f / (frame_cnt * frame_length));
#ifdef TEST_SSE
printf("BER2: %.2e ", (float)errors2 / (frame_cnt * frame_length));
printf("sse BER: %.2e ", (float)errors_sse / (frame_cnt * frame_length));
#endif
printf("\r");
printf("\r\n");
}
printf("\n");
if (snr_points == 1) {
printf("BER : %g\t%u errors\n", (float)errors / (frame_cnt * frame_length), errors);
if (errors_s >= 0)
printf(" int16 BER : %g\t%u errors\n", (float)errors_s / (frame_cnt * frame_length), errors_s);
if (errors_us >= 0)
printf("uint16 BER : %g\t%u errors\n", (float)errors_us / (frame_cnt * frame_length), errors_us);
if (errors_c >= 0)
printf("uint8 BER : %g\t%u errors\n", (float)errors_c / (frame_cnt * frame_length), errors_c);
if (errors_f >= 0)
printf("float BER : %g\t%u errors\n", (float)errors_f / (frame_cnt * frame_length), errors_f);
#ifdef TEST_SSE
printf("BER SSE: %g\t%u errors\n", (float)errors2 / (frame_cnt * frame_length), errors2);
printf("sse BER : %g\t%u errors\n", (float)errors_sse / (frame_cnt * frame_length), errors_sse);
#endif
}
}
@ -277,17 +286,24 @@ int main(int argc, char** argv)
free(llr);
free(llr_c);
free(llr_s);
free(llr_us);
free(data_rx);
free(data_rx2);
if (snr_points == 1) {
int expected_errors = get_expected_errors(nof_frames, seed, frame_length, tail_biting, ebno_db);
if (expected_errors == -1) {
int expected_e = get_expected_errors(nof_frames, seed, frame_length, tail_biting, ebno_db);
if (expected_e == -1) {
ERROR("Test parameters not defined in test_results.h\n");
exit(-1);
} else {
printf("errors =%d, expected =%d\n", errors, expected_errors);
exit(errors > expected_errors);
printf(
"errors =(%d,%d,%d,%d,%d), expected =%d\n", errors_s, errors_us, errors_c, errors_f, errors_sse, expected_e);
bool passed = true;
passed &= (bool)(errors_us <= expected_e);
passed &= (bool)(errors_s <= expected_e);
passed &= (bool)(errors_c <= expected_e);
passed &= (bool)(errors_f <= expected_e);
passed &= (bool)(errors_sse <= expected_e);
exit(!passed);
}
} else {
printf("\n");

5
lib/src/phy/fec/test/viterbi_test.h
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@ -38,6 +38,11 @@ static expected_errors_t expected_errors[] = {{1000, 1, 40, true, 0.0, 7282},
{1000, 1, 40, true, 3.0, 176},
{1000, 1, 40, true, 4.5, 24},
{1000, 1, 56, true, 0.0, 7282},
{1000, 1, 56, true, 2.0, 725},
{1000, 1, 56, true, 3.0, 176},
{1000, 1, 56, true, 4.5, 24},
{100, 1, 1000, true, 0.0, 13208},
{100, 1, 1000, true, 2.0, 939},
{100, 1, 1000, true, 3.0, 110},

31
lib/src/phy/fec/viterbi.c
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@ -114,6 +114,9 @@ void free37_sse(void* o)
if (q->symbols_uc) {
free(q->symbols_uc);
}
if (q->symbols_us) {
free(q->symbols_us);
}
if (q->tmp) {
free(q->tmp);
}
@ -320,11 +323,18 @@ int init37_sse(srslte_viterbi_t* q, int poly[3], uint32_t framebits, bool tail_b
q->decode = decode37_sse;
q->free = free37_sse;
q->decode_f = NULL;
q->symbols_uc = srslte_vec_malloc(3 * (q->framebits + q->K - 1) * sizeof(uint8_t));
q->symbols_uc = srslte_vec_u8_malloc(3 * (q->framebits + q->K - 1));
if (!q->symbols_uc) {
perror("malloc");
return -1;
}
#ifdef VITERBI_16
q->symbols_us = srslte_vec_u16_malloc(3 * (q->framebits + q->K - 1));
if (!q->symbols_us) {
perror("malloc");
return -1;
}
#endif
if (q->tail_biting) {
q->tmp = srslte_vec_malloc(TB_ITER * 3 * (q->framebits + q->K - 1) * sizeof(uint8_t));
if (!q->tmp) {
@ -477,6 +487,7 @@ int srslte_viterbi_init(srslte_viterbi_t* q,
uint32_t max_frame_length,
bool tail_bitting)
{
bzero(q, sizeof(srslte_viterbi_t));
switch (type) {
case SRSLTE_VITERBI_37:
#ifdef LV_HAVE_SSE
@ -586,7 +597,7 @@ int srslte_viterbi_decode_s(srslte_viterbi_t* q, int16_t* symbols, uint8_t* data
}
}
#ifdef VITERBI_16
srslte_vec_quant_sus(symbols, q->symbols_us, 1, 32767, len);
srslte_vec_quant_sus(symbols, q->symbols_us, 1, (float)INT16_MAX, UINT16_MAX, len);
return srslte_viterbi_decode_us(q, q->symbols_us, data, frame_length);
#else
srslte_vec_quant_suc(symbols, q->symbols_uc, (float)q->gain_quant / max, 127, 255, len);
@ -596,10 +607,22 @@ int srslte_viterbi_decode_s(srslte_viterbi_t* q, int16_t* symbols, uint8_t* data
int srslte_viterbi_decode_us(srslte_viterbi_t* q, uint16_t* symbols, uint8_t* data, uint32_t frame_length)
{
return q->decode_s(q, symbols, data, frame_length);
int ret = SRSLTE_ERROR;
if (q && q->decode_s) {
ret = q->decode_s(q, symbols, data, frame_length);
}
return ret;
}
int srslte_viterbi_decode_uc(srslte_viterbi_t* q, uint8_t* symbols, uint8_t* data, uint32_t frame_length)
{
return q->decode(q, symbols, data, frame_length);
int ret = SRSLTE_ERROR;
if (q && q->decode) {
ret = q->decode(q, symbols, data, frame_length);
}
return ret;
}

2
lib/src/phy/utils/bit.c
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@ -784,7 +784,7 @@ void srslte_bit_fprint(FILE* stream, uint8_t* bits, int nof_bits)
fprintf(stream, "%d]\n", bits[i]);
}
uint32_t srslte_bit_diff(uint8_t* x, uint8_t* y, int nbits)
uint32_t srslte_bit_diff(const uint8_t* x, const uint8_t* y, int nbits)
{
uint32_t errors = 0;
for (int i = 0; i < nbits; i++) {

90
lib/src/phy/utils/vector.c
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@ -154,6 +154,26 @@ float* srslte_vec_f_malloc(uint32_t nsamples)
return (float*)srslte_vec_malloc((uint32_t)sizeof(float) * nsamples);
}
int16_t* srslte_vec_i16_malloc(uint32_t nsamples)
{
return (int16_t*)srslte_vec_malloc((uint32_t)sizeof(int16_t) * nsamples);
}
uint16_t* srslte_vec_u16_malloc(uint32_t nsamples)
{
return (uint16_t*)srslte_vec_malloc((uint32_t)sizeof(uint16_t) * nsamples);
}
int8_t* srslte_vec_i8_malloc(uint32_t nsamples)
{
return (int8_t*)srslte_vec_malloc((uint32_t)sizeof(int8_t) * nsamples);
}
uint8_t* srslte_vec_u8_malloc(uint32_t nsamples)
{
return (uint8_t*)srslte_vec_malloc((uint32_t)sizeof(uint8_t) * nsamples);
}
void* srslte_vec_realloc(void* ptr, uint32_t old_size, uint32_t new_size)
{
#ifndef LV_HAVE_SSE
@ -499,17 +519,17 @@ uint32_t srslte_vec_max_abs_ci(const cf_t* x, const uint32_t len)
return srslte_vec_max_ci_simd(x, len);
}
void srslte_vec_quant_fus(float* in, uint16_t* out, float gain, float offset, float clip, uint32_t len)
void srslte_vec_quant_fus(const float* in,
uint16_t* out,
const float gain,
const float offset,
const uint16_t clip,
const uint32_t len)
{
int i;
long tmp;
for (i = 0; i < len; i++) {
tmp = (long)(offset + gain * in[i]);
if (tmp < 0)
tmp = 0;
if (tmp > clip)
tmp = clip;
for (uint32_t i = 0; i < len; i++) {
int32_t tmp = (int32_t)(offset + gain * in[i]);
tmp = SRSLTE_MAX(tmp, 0);
tmp = SRSLTE_MIN(tmp, (int32_t)clip);
out[i] = (uint16_t)tmp;
}
}
@ -518,18 +538,13 @@ void srslte_vec_quant_fuc(const float* in,
uint8_t* out,
const float gain,
const float offset,
const float clip,
const uint8_t clip,
const uint32_t len)
{
int i;
int tmp;
for (i = 0; i < len; i++) {
tmp = (int)(offset + gain * in[i]);
if (tmp < 0)
tmp = 0;
if (tmp > clip)
tmp = clip;
for (uint32_t i = 0; i < len; i++) {
int32_t tmp = (int32_t)(offset + gain * in[i]);
tmp = SRSLTE_MAX(tmp, 0);
tmp = SRSLTE_MIN(tmp, (int32_t)clip);
out[i] = (uint8_t)tmp;
}
}
@ -537,32 +552,29 @@ void srslte_vec_quant_fuc(const float* in,
void srslte_vec_quant_suc(const int16_t* in,
uint8_t* out,
const float gain,
const int16_t offset,
const int16_t clip,
const float offset,
const uint8_t clip,
const uint32_t len)
{
int i;
int16_t tmp;
for (i = 0; i < len; i++) {
tmp = (int16_t)(offset + in[i] * gain);
if (tmp < 0)
tmp = 0;
if (tmp > clip)
tmp = clip;
for (uint32_t i = 0; i < len; i++) {
int32_t tmp = (int32_t)(offset + (float)in[i] * gain);
tmp = SRSLTE_MAX(tmp, 0);
tmp = SRSLTE_MIN(tmp, (int32_t)clip);
out[i] = (uint8_t)tmp;
}
}
void srslte_vec_quant_sus(const int16_t* in, uint16_t* out, const float gain, const int16_t offset, const uint32_t len)
void srslte_vec_quant_sus(const int16_t* in,
uint16_t* out,
const float gain,
const float offset,
const uint16_t clip,
const uint32_t len)
{
int i;
int16_t tmp;
for (i = 0; i < len; i++) {
tmp = (offset + in[i] * gain);
if (tmp < 0)
tmp = 0;
for (uint32_t i = 0; i < len; i++) {
int32_t tmp = (int32_t)(offset + gain * (float)in[i]);
tmp = SRSLTE_MAX(tmp, 0);
tmp = SRSLTE_MIN(tmp, (int32_t)clip);
out[i] = (uint16_t)tmp;
}
}

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