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@ -41,9 +41,11 @@
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* - **-m \<number\>** Modulation type BPSK = 0, QPSK =1, QAM16 = 2, QAM64 = 3, QAM256 = 4.
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* - **-M \<number\>** Limited buffer size.
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* - **-s \<number\>** SNR in dB(Default 3 dB).
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* - **-B \<number\>** Number of codewords in a batch.(Default 100).
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* - **-N \<number\>** Max number of simulated batches.(Default 10000).
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* - **-E \<number\>** Minimum number of errors for a significant simulation.(Default 100).
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*/
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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@ -58,22 +60,21 @@
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#include "srslte/phy/utils/random.h"
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#include "srslte/phy/utils/vector.h"
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srslte_basegraph_t base_graph = BG1; /*!< \brief Base Graph (BG1 or BG2). */
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uint32_t lift_size = 2; /*!< \brief Lifting Size. */
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uint32_t rm_length = 0; /*!< \brief Codeword length after rate matching. */
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uint32_t F = 22 - 5; /*!< \brief Number of filler bits in each CBS. */
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uint32_t E = 14000; /*!< \brief Rate-matched Codeword size. */
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uint8_t rv = 0; /*!< \brief Redundancy version {0-3}. */
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mod_type_t mod_type = BPSK; /*!< \brief Modulation type: BPSK, QPSK, QAM16, QAM64, QAM256 = 4 */
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uint32_t Nref = 0; /*!< \brief Limited buffer size. */
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float snr = 0; /*!< \brief Signal-to-Noise Ratio [dB]. */
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int finalK = 0; /*!< \brief Number of uncoded bits (message length, including punctured and filler bits). */
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int finalN = 0; /*!< \brief Number of coded bits (codeword length). */
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#define BATCH_SIZE 100 /*!< \brief Number of codewords in a batch. */
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#define MAX_N_BATCH 10000 /*!< \brief Max number of simulated batches. */
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#define REQ_ERRORS 100 /*!< \brief Minimum number of errors for a significant simulation. */
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static srslte_basegraph_t base_graph = BG1; /*!< \brief Base Graph (BG1 or BG2). */
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static uint32_t lift_size = 2; /*!< \brief Lifting Size. */
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static uint32_t rm_length = 0; /*!< \brief Codeword length after rate matching. */
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static uint32_t F = 22 - 5; /*!< \brief Number of filler bits in each CBS. */
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static uint8_t rv = 0; /*!< \brief Redundancy version {0-3}. */
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static mod_type_t mod_type = BPSK; /*!< \brief Modulation type: BPSK, QPSK, QAM16, QAM64, QAM256 = 4 */
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static uint32_t Nref = 0; /*!< \brief Limited buffer size. */
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static float snr = 0; /*!< \brief Signal-to-Noise Ratio [dB]. */
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static int finalK = 0; /*!< \brief Number of uncoded bits (message length, including punctured and filler bits). */
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static int finalN = 0; /*!< \brief Number of coded bits (codeword length). */
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static int batch_size = 100; /*!< \brief Number of codewords in a batch. */
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static int max_n_batch = 10000; /*!< \brief Max number of simulated batches. */
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static int req_errors = 100; /*!< \brief Minimum number of errors for a significant simulation. */
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#define MS_SF 0.75f /*!< \brief Scaling factor for the normalized min-sum decoding algorithm. */
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/*!
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@ -91,6 +92,9 @@ void usage(char* prog)
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printf("\t-m Modulation_type BPSK=0, QPSK=1, 16QAM=2, 64QAM=3, 256QAM = 4 [Default %d]\n", mod_type);
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printf("\t-M Limited buffer size (Nref) [Default = %d (normal buffer Nref = N)]\n", Nref);
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printf("\t-s SNR [dB, Default %.1f dB]\n", snr);
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printf("\t-B Number of codewords in a batch. [Default %d]\n", batch_size);
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printf("\t-N Max number of simulated batches. [Default %d]\n", max_n_batch);
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printf("\t-E Minimum number of errors for a significant simulation. [Default %d]\n", req_errors);
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}
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/*!
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@ -99,7 +103,7 @@ void usage(char* prog)
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void parse_args(int argc, char** argv)
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{
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int opt = 0;
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while ((opt = getopt(argc, argv, "b:l:e:f:r:m:M:s:")) != -1) {
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while ((opt = getopt(argc, argv, "b:l:e:f:r:m:M:s:B:N:E:")) != -1) {
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switch (opt) {
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case 'b':
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base_graph = (int)strtol(optarg, NULL, 10) - 1;
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@ -123,7 +127,16 @@ void parse_args(int argc, char** argv)
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Nref = (uint32_t)strtol(optarg, NULL, 10);
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break;
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case 's':
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snr = strtod(optarg, NULL);
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snr = (float)strtod(optarg, NULL);
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break;
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case 'B':
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batch_size = (int)strtol(optarg, NULL, 10);
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break;
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case 'N':
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max_n_batch = (int)strtol(optarg, NULL, 10);
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break;
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case 'E':
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req_errors = (int)strtol(optarg, NULL, 10);
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break;
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default:
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usage(argv[0]);
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@ -282,22 +295,22 @@ int main(int argc, char** argv)
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1.0 * (encoder.liftK - F) / rm_length);
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printf("\n Signal-to-Noise Ratio -> %.2f dB\n", snr);
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messages_true = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_f = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_s = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_c = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_c_flood = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_avx = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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messages_sim_avx_flood = malloc(finalK * BATCH_SIZE * sizeof(uint8_t));
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codewords = malloc(finalN * BATCH_SIZE * sizeof(uint8_t));
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rm_codewords = malloc(rm_length * BATCH_SIZE * sizeof(uint8_t));
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rm_symbols = malloc(rm_length * BATCH_SIZE * sizeof(float));
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rm_symbols_s = malloc(rm_length * BATCH_SIZE * sizeof(uint16_t));
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rm_symbols_c = malloc(rm_length * BATCH_SIZE * sizeof(uint8_t));
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symbols = malloc(finalN * BATCH_SIZE * sizeof(float));
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symbols_s = malloc(finalN * BATCH_SIZE * sizeof(int16_t));
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symbols_c = malloc(finalN * BATCH_SIZE * sizeof(int8_t));
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messages_true = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_f = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_s = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_c = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_c_flood = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_avx = malloc(finalK * batch_size * sizeof(uint8_t));
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messages_sim_avx_flood = malloc(finalK * batch_size * sizeof(uint8_t));
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codewords = malloc(finalN * batch_size * sizeof(uint8_t));
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rm_codewords = malloc(rm_length * batch_size * sizeof(uint8_t));
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rm_symbols = malloc(rm_length * batch_size * sizeof(float));
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rm_symbols_s = malloc(rm_length * batch_size * sizeof(uint16_t));
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rm_symbols_c = malloc(rm_length * batch_size * sizeof(uint8_t));
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symbols = malloc(finalN * batch_size * sizeof(float));
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symbols_s = malloc(finalN * batch_size * sizeof(int16_t));
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symbols_c = malloc(finalN * batch_size * sizeof(int8_t));
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if (!messages_true || !messages_sim_f || !messages_sim_s || !messages_sim_c || //
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!messages_sim_avx || !messages_sim_c_flood || !messages_sim_avx_flood || //
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!codewords || !rm_codewords || !rm_symbols || !rm_symbols_s || !rm_symbols_c || !symbols || !symbols_s ||
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@ -336,8 +349,8 @@ int main(int argc, char** argv)
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printf("\nBatch:\n ");
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while (((n_error_words_f < REQ_ERRORS) || (n_error_words_s < REQ_ERRORS) || (n_error_words_c < REQ_ERRORS)) &&
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(i_batch < MAX_N_BATCH)) {
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while (((n_error_words_f < req_errors) || (n_error_words_s < req_errors) || (n_error_words_c < req_errors)) &&
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(i_batch < max_n_batch)) {
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i_batch++;
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if (!(i_batch % 10)) {
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@ -348,7 +361,7 @@ int main(int argc, char** argv)
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}
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/* generate data_tx */
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK - F; j++) {
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messages_true[i * finalK + j] = srslte_random_uniform_int_dist(random_gen, 0, 1);
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}
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@ -357,21 +370,16 @@ int main(int argc, char** argv)
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}
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}
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// lDPC Encoding
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// compute the number of symbols that we need to encode/decode: at least (E + F) if E+F < N,
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unsigned int n_useful_symbols = (E + F);
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_encoder_encode(
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&encoder, messages_true + j * finalK, codewords + j * finalN, finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_encoder_encode(&encoder, messages_true + j * finalK, codewords + j * finalN, finalK);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_enc += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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// rate matching
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for (j = 0; j < BATCH_SIZE; j++) {
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_rm_tx(&rm_tx,
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codewords + j * finalN,
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rm_codewords + j * rm_length,
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@ -383,23 +391,23 @@ int main(int argc, char** argv)
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Nref);
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}
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < rm_length; j++) {
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rm_symbols[i * rm_length + j] = 1 - 2 * rm_codewords[i * rm_length + j];
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}
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}
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// Apply AWGN
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srslte_ch_awgn_f(rm_symbols, rm_symbols, noise_std_dev, BATCH_SIZE * rm_length);
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srslte_ch_awgn_f(rm_symbols, rm_symbols, noise_std_dev, batch_size * rm_length);
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// Convert symbols into LLRs
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < rm_length; j++) {
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rm_symbols[i * rm_length + j] = rm_symbols[i * rm_length + j] * 2 / (noise_std_dev * noise_std_dev);
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}
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}
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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if (srslte_ldpc_rm_rx_f(&rm_rx,
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rm_symbols + i * rm_length,
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symbols + i * finalN,
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@ -417,14 +425,14 @@ int main(int argc, char** argv)
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//////// Floating point
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// Recover messages
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_decoder_decode_f(&decoder_f, symbols + j * finalN, messages_sim_f + j * finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_decoder_decode_f(&decoder_f, symbols + j * finalN, messages_sim_f + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_f += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK; j++) {
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i_bit = i * finalK + j;
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if (messages_sim_f[i_bit] != (1U & messages_true[i_bit])) {
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@ -437,10 +445,10 @@ int main(int argc, char** argv)
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//////// Fixed point - 16 bit
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// Quantize LLRs with 16 bits
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srslte_vec_quant_fs(rm_symbols, rm_symbols_s, gain_s, 0, inf15, BATCH_SIZE * rm_length);
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srslte_vec_quant_fs(rm_symbols, rm_symbols_s, gain_s, 0, inf15, batch_size * rm_length);
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// Rate dematcher
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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if (srslte_ldpc_rm_rx_s(&rm_rx_s,
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rm_symbols_s + i * rm_length,
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symbols_s + i * finalN,
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@ -457,14 +465,14 @@ int main(int argc, char** argv)
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// Recover messages
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_decoder_decode_s(&decoder_s, symbols_s + j * finalN, messages_sim_s + j * finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_decoder_decode_s(&decoder_s, symbols_s + j * finalN, messages_sim_s + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_s += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK; j++) {
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i_bit = i * finalK + j;
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if (messages_sim_s[i_bit] != (1U & messages_true[i_bit])) {
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@ -476,10 +484,10 @@ int main(int argc, char** argv)
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//////// Fixed point - 8 bit
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// Quantize LLRs with 8 bits
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srslte_vec_quant_fc(rm_symbols, rm_symbols_c, gain_c, 0, inf7, BATCH_SIZE * rm_length);
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srslte_vec_quant_fc(rm_symbols, rm_symbols_c, gain_c, 0, inf7, batch_size * rm_length);
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// Rate dematcher
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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if (srslte_ldpc_rm_rx_c(&rm_rx_c,
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rm_symbols_c + i * rm_length,
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symbols_c + i * finalN,
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@ -496,14 +504,14 @@ int main(int argc, char** argv)
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// Recover messages
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_decoder_decode_c(&decoder_c, symbols_c + j * finalN, messages_sim_c + j * finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_decoder_decode_c(&decoder_c, symbols_c + j * finalN, messages_sim_c + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_c += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK; j++) {
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i_bit = i * finalK + j;
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if (messages_sim_c[i_bit] != (1U & messages_true[i_bit])) {
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@ -517,15 +525,14 @@ int main(int argc, char** argv)
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// Recover messages
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_decoder_decode_c(
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&decoder_c_flood, symbols_c + j * finalN, messages_sim_c_flood + j * finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_decoder_decode_c(&decoder_c_flood, symbols_c + j * finalN, messages_sim_c_flood + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_c_flood += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK; j++) {
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i_bit = i * finalK + j;
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if (messages_sim_c_flood[i_bit] != (1U & messages_true[i_bit])) {
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@ -540,15 +547,14 @@ int main(int argc, char** argv)
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// Recover messages
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gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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srslte_ldpc_decoder_decode_c(
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&decoder_avx, symbols_c + j * finalN, messages_sim_avx + j * finalK, n_useful_symbols);
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for (j = 0; j < batch_size; j++) {
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srslte_ldpc_decoder_decode_c(&decoder_avx, symbols_c + j * finalN, messages_sim_avx + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_avx += t[0].tv_sec + 1e-6 * t[0].tv_usec;
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for (i = 0; i < BATCH_SIZE; i++) {
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for (i = 0; i < batch_size; i++) {
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for (j = 0; j < finalK; j++) {
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i_bit = i * finalK + j;
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if (messages_sim_avx[i_bit] != (1U & messages_true[i_bit])) {
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@ -562,15 +568,15 @@ int main(int argc, char** argv)
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// Recover messages
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|
gettimeofday(&t[1], NULL);
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for (j = 0; j < BATCH_SIZE; j++) {
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for (j = 0; j < batch_size; j++) {
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|
srslte_ldpc_decoder_decode_c(
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&decoder_avx_flood, symbols_c + j * finalN, messages_sim_avx_flood + j * finalK, n_useful_symbols);
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&decoder_avx_flood, symbols_c + j * finalN, messages_sim_avx_flood + j * finalK, finalN);
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}
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gettimeofday(&t[2], NULL);
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get_time_interval(t);
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elapsed_time_dec_avx_flood += t[0].tv_sec + 1e-6 * t[0].tv_usec;
|
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|
for (i = 0; i < BATCH_SIZE; i++) {
|
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|
for (i = 0; i < batch_size; i++) {
|
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|
for (j = 0; j < finalK; j++) {
|
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|
i_bit = i * finalK + j;
|
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|
|
|
if (messages_sim_avx_flood[i_bit] != (1U & messages_true[i_bit])) {
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@ -583,9 +589,9 @@ int main(int argc, char** argv)
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|
}
|
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|
|
printf("\nEstimated throughput encoder:\n %e word/s\n %e bit/s (information)\n %e bit/s (encoded)\n",
|
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|
|
i_batch * BATCH_SIZE / elapsed_time_enc,
|
|
|
|
|
i_batch * BATCH_SIZE * finalK / elapsed_time_enc,
|
|
|
|
|
i_batch * BATCH_SIZE * finalN / elapsed_time_enc);
|
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|
|
|
i_batch * batch_size / elapsed_time_enc,
|
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|
|
i_batch * batch_size * finalK / elapsed_time_enc,
|
|
|
|
|
i_batch * batch_size * finalN / elapsed_time_enc);
|
|
|
|
|
|
|
|
|
|
print_decoder("FLOATING POINT", i_batch, n_error_words_f, elapsed_time_dec_f);
|
|
|
|
|
print_decoder("FIXED POINT (16 bits)", i_batch, n_error_words_s, elapsed_time_dec_s);
|
|
|
|
|
@ -617,6 +623,7 @@ int main(int argc, char** argv)
|
|
|
|
|
free(rm_codewords);
|
|
|
|
|
free(codewords);
|
|
|
|
|
free(messages_sim_avx);
|
|
|
|
|
free(messages_sim_avx_flood);
|
|
|
|
|
free(messages_sim_c_flood);
|
|
|
|
|
free(messages_sim_c);
|
|
|
|
|
free(messages_sim_s);
|
|
|
|
|
@ -625,6 +632,7 @@ int main(int argc, char** argv)
|
|
|
|
|
srslte_random_free(random_gen);
|
|
|
|
|
#ifdef LV_HAVE_AVX2
|
|
|
|
|
srslte_ldpc_decoder_free(&decoder_avx);
|
|
|
|
|
srslte_ldpc_decoder_free(&decoder_avx_flood);
|
|
|
|
|
#endif // LV_HAVE_AVX2
|
|
|
|
|
srslte_ldpc_decoder_free(&decoder_c_flood);
|
|
|
|
|
srslte_ldpc_decoder_free(&decoder_c);
|
|
|
|
|
@ -640,10 +648,10 @@ int main(int argc, char** argv)
|
|
|
|
|
void print_decoder(char* title, int n_batches, int n_errors, double elapsed_time)
|
|
|
|
|
{
|
|
|
|
|
printf("\n**** %s ****", title);
|
|
|
|
|
printf("\nEstimated word error rate:\n %e (%d errors)\n", (double)n_errors / n_batches / BATCH_SIZE, n_errors);
|
|
|
|
|
printf("\nEstimated word error rate:\n %e (%d errors)\n", (double)n_errors / n_batches / batch_size, n_errors);
|
|
|
|
|
|
|
|
|
|
printf("Estimated throughput decoder:\n %e word/s\n %e bit/s (information)\n %e bit/s (encoded)\n",
|
|
|
|
|
n_batches * BATCH_SIZE / elapsed_time,
|
|
|
|
|
n_batches * BATCH_SIZE * finalK / elapsed_time,
|
|
|
|
|
n_batches * BATCH_SIZE * finalN / elapsed_time);
|
|
|
|
|
n_batches * batch_size / elapsed_time,
|
|
|
|
|
n_batches * batch_size * finalK / elapsed_time,
|
|
|
|
|
n_batches * batch_size * finalN / elapsed_time);
|
|
|
|
|
}
|
|
|
|
|
|
Xavier Arteaga
4 years ago
committed by
Xavier Arteaga