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@ -12,6 +12,7 @@
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#include "srslte/phy/phch/pdcch_nr.h"
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#include "srslte/phy/phch/pdcch_nr.h"
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#include "srslte/phy/fec/polar/polar_chanalloc.h"
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#include "srslte/phy/fec/polar/polar_chanalloc.h"
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#include "srslte/phy/fec/polar/polar_interleaver.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/phy/utils/debug.h"
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#include "srslte/phy/utils/vector.h"
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#include "srslte/phy/utils/vector.h"
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@ -316,7 +317,7 @@ static uint32_t pdcch_nr_cp(const srslte_pdcch_nr_t* q,
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return count;
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return count;
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}
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}
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uint32_t pdcch_nr_c_init(const srslte_pdcch_nr_t* q, const srslte_dci_msg_nr_t* dci_msg)
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static uint32_t pdcch_nr_c_init(const srslte_pdcch_nr_t* q, const srslte_dci_msg_nr_t* dci_msg)
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{
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{
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uint32_t n_id = (dci_msg->search_space == srslte_search_space_type_ue && q->coreset.dmrs_scrambling_id_present)
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uint32_t n_id = (dci_msg->search_space == srslte_search_space_type_ue && q->coreset.dmrs_scrambling_id_present)
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? q->coreset.dmrs_scrambling_id
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? q->coreset.dmrs_scrambling_id
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@ -340,21 +341,26 @@ int srslte_pdcch_nr_encode(srslte_pdcch_nr_t* q, const srslte_dci_msg_nr_t* dci_
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}
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}
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// Calculate...
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// Calculate...
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q->K = dci_msg->nof_bits + 24U; // Payload size including CRC
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q->K = dci_msg->nof_bits + 24U; // Payload size including CRC
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q->M = (1U << dci_msg->location.L) * (SRSLTE_NRE - 3U) * 6U; // Number of RE
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q->M = (1U << dci_msg->location.L) * (SRSLTE_NRE - 3U) * 6U; // Number of RE
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q->E = q->M * 2; // Number of Rate-Matched bits
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q->E = q->M * 2; // Number of Rate-Matched bits
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uint32_t cinit = pdcch_nr_c_init(q, dci_msg); // Pseudo-random sequence initiation
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// Get polar code
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// Get polar code
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if (srslte_polar_code_get(&q->code, q->K, q->E, 9U) < SRSLTE_SUCCESS) {
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if (srslte_polar_code_get(&q->code, q->K, q->E, 9U) < SRSLTE_SUCCESS) {
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return SRSLTE_ERROR;
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return SRSLTE_ERROR;
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}
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}
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PDCCH_INFO_TX("K=%d; E=%d; M=%d; n=%d;\n", q->K, q->E, q->M, q->code.n);
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PDCCH_INFO_TX("K=%d; E=%d; M=%d; n=%d; cinit=%08x;\n", q->K, q->E, q->M, q->code.n, cinit);
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// Set first L bits to ones, c will have an offset of 24 bits
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uint8_t* c = q->c;
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srslte_bit_unpack(UINT32_MAX, &c, 24U);
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// Copy DCI message
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// Copy DCI message
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srslte_vec_u8_copy(q->c, dci_msg->payload, dci_msg->nof_bits);
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srslte_vec_u8_copy(c, dci_msg->payload, dci_msg->nof_bits);
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// Append CRC
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// Append CRC
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srslte_crc_attach(&q->crc24c, q->c, dci_msg->nof_bits);
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srslte_crc_attach(&q->crc24c, q->c, q->K);
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PDCCH_INFO_TX("Append CRC %06x\n", (uint32_t)srslte_crc_checksum_get(&q->crc24c));
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PDCCH_INFO_TX("Append CRC %06x\n", (uint32_t)srslte_crc_checksum_get(&q->crc24c));
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@ -364,16 +370,22 @@ int srslte_pdcch_nr_encode(srslte_pdcch_nr_t* q, const srslte_dci_msg_nr_t* dci_
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srslte_bit_unpack(dci_msg->rnti, &ptr, 16);
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srslte_bit_unpack(dci_msg->rnti, &ptr, 16);
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// Scramble CRC with RNTI
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// Scramble CRC with RNTI
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srslte_vec_xor_bbb(unpacked_rnti, &q->c[q->K - 16], &q->c[q->K - 16], 16);
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srslte_vec_xor_bbb(unpacked_rnti, &c[q->K - 16], &c[q->K - 16], 16);
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// Print c
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// Interleave
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uint8_t c_prime[SRSLTE_POLAR_INTERLEAVER_K_MAX_IL];
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srslte_polar_interleaver_run_u8(c, c_prime, q->K, true);
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// Print c and c_prime (after interleaving)
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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PDCCH_INFO_TX("c=");
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PDCCH_INFO_TX("c=");
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srslte_vec_fprint_hex(stdout, q->c, q->K);
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srslte_vec_fprint_hex(stdout, c, q->K);
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PDCCH_INFO_TX("c_prime=");
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srslte_vec_fprint_hex(stdout, c_prime, q->K);
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}
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}
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// Allocate channel
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// Allocate channel
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srslte_polar_chanalloc_tx(q->c, q->allocated, q->code.N, q->code.K, q->code.nPC, q->code.K_set, q->code.PC_set);
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srslte_polar_chanalloc_tx(c_prime, q->allocated, q->code.N, q->code.K, q->code.nPC, q->code.K_set, q->code.PC_set);
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// Encode bits
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// Encode bits
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if (srslte_polar_encoder_encode(&q->encoder, q->allocated, q->d, q->code.n) < SRSLTE_SUCCESS) {
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if (srslte_polar_encoder_encode(&q->encoder, q->allocated, q->d, q->code.n) < SRSLTE_SUCCESS) {
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@ -383,14 +395,14 @@ int srslte_pdcch_nr_encode(srslte_pdcch_nr_t* q, const srslte_dci_msg_nr_t* dci_
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// Print d
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// Print d
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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PDCCH_INFO_TX("d=");
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PDCCH_INFO_TX("d=");
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srslte_vec_fprint_byte(stdout, q->d, q->K);
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srslte_vec_fprint_byte(stdout, q->d, q->code.N);
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}
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}
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// Rate matching
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// Rate matching
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srslte_polar_rm_tx(&q->rm, q->d, q->f, q->code.n, q->E, q->K, PDCCH_NR_POLAR_RM_IBIL);
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srslte_polar_rm_tx(&q->rm, q->d, q->f, q->code.n, q->E, q->K, PDCCH_NR_POLAR_RM_IBIL);
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// Scrambling
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// Scrambling
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srslte_sequence_apply_bit(q->f, q->f, q->E, pdcch_nr_c_init(q, dci_msg));
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srslte_sequence_apply_bit(q->f, q->f, q->E, cinit);
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// Modulation
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// Modulation
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srslte_mod_modulate(&q->modem_table, q->f, q->symbols, q->E);
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srslte_mod_modulate(&q->modem_table, q->f, q->symbols, q->E);
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@ -509,12 +521,22 @@ int srslte_pdcch_nr_decode(srslte_pdcch_nr_t* q,
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}
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}
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// De-allocate channel
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// De-allocate channel
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srslte_polar_chanalloc_rx(q->allocated, q->c, q->code.K, q->code.nPC, q->code.K_set, q->code.PC_set);
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uint8_t c_prime[SRSLTE_POLAR_INTERLEAVER_K_MAX_IL];
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srslte_polar_chanalloc_rx(q->allocated, c_prime, q->code.K, q->code.nPC, q->code.K_set, q->code.PC_set);
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// Set first L bits to ones, c will have an offset of 24 bits
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uint8_t* c = q->c;
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srslte_bit_unpack(UINT32_MAX, &c, 24U);
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// De-interleave
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srslte_polar_interleaver_run_u8(c_prime, c, q->K, false);
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// Print c
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// Print c
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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PDCCH_INFO_RX("c_prime=");
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srslte_vec_fprint_hex(stdout, c_prime, q->K);
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PDCCH_INFO_RX("c=");
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PDCCH_INFO_RX("c=");
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srslte_vec_fprint_hex(stdout, q->c, q->K);
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srslte_vec_fprint_hex(stdout, c, q->K);
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}
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}
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// Unpack RNTI
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// Unpack RNTI
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@ -523,21 +545,21 @@ int srslte_pdcch_nr_decode(srslte_pdcch_nr_t* q,
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srslte_bit_unpack(dci_msg->rnti, &ptr, 16);
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srslte_bit_unpack(dci_msg->rnti, &ptr, 16);
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// De-Scramble CRC with RNTI
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// De-Scramble CRC with RNTI
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ptr = &q->c[q->K - 24];
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srslte_vec_xor_bbb(unpacked_rnti, &c[q->K - 16], &c[q->K - 16], 16);
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srslte_vec_xor_bbb(unpacked_rnti, &q->c[q->K - 16], &q->c[q->K - 16], 16);
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// Check CRC
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// Check CRC
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uint32_t checksum1 = srslte_crc_checksum(&q->crc24c, q->c, dci_msg->nof_bits);
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ptr = &c[q->K - 24];
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uint32_t checksum1 = srslte_crc_checksum(&q->crc24c, q->c, q->K);
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uint32_t checksum2 = srslte_bit_pack(&ptr, 24);
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uint32_t checksum2 = srslte_bit_pack(&ptr, 24);
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res->crc = checksum1 == checksum2;
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res->crc = checksum1 == checksum2;
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
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PDCCH_INFO_RX("CRC={%06x, %06x}; msg=", checksum1, checksum2);
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PDCCH_INFO_RX("CRC={%06x, %06x}; msg=", checksum1, checksum2);
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srslte_vec_fprint_hex(stdout, q->c, dci_msg->nof_bits);
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srslte_vec_fprint_hex(stdout, c, dci_msg->nof_bits);
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}
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}
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// Copy DCI message
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// Copy DCI message
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srslte_vec_u8_copy(dci_msg->payload, q->c, dci_msg->nof_bits);
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srslte_vec_u8_copy(dci_msg->payload, c, dci_msg->nof_bits);
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if (q->meas_time_en) {
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if (q->meas_time_en) {
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gettimeofday(&t[2], NULL);
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gettimeofday(&t[2], NULL);
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