170 lines
6.4 KiB
C
170 lines
6.4 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include "nr_refsig.h"
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void nr_init_pbch_dmrs(PHY_VARS_gNB* gNB)
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{
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unsigned int x1 = 0, x2 = 0;
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uint16_t Nid, i_ssb, i_ssb2;
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unsigned char Lmax, l, n_hf, N_hf;
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nfapi_nr_config_request_scf_t *cfg = &gNB->gNB_config;
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NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
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uint8_t reset;
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Nid = cfg->cell_config.phy_cell_id.value;
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Lmax = fp->Lmax;
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N_hf = (Lmax == 4)? 2:1;
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for (n_hf = 0; n_hf < N_hf; n_hf++) {
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for (l = 0; l < Lmax ; l++) {
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i_ssb = l & (Lmax-1);
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i_ssb2 = i_ssb + (n_hf<<2);
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reset = 1;
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x2 = (1<<11) * (i_ssb2 + 1) * ((Nid>>2) + 1) + (1<<6) * (i_ssb2 + 1) + (Nid&3);
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for (uint8_t n=0; n<NR_PBCH_DMRS_LENGTH_DWORD; n++) {
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gNB->nr_gold_pbch_dmrs[n_hf][l][n] = lte_gold_generic(&x1, &x2, reset);
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reset = 0;
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}
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}
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}
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}
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void nr_init_pdcch_dmrs(PHY_VARS_gNB* gNB, uint32_t Nid)
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{
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NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
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uint32_t ***pdcch_dmrs = gNB->nr_gold_pdcch_dmrs;
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int pdcch_dmrs_init_length = (((fp->N_RB_DL << 1) * 3) >> 5) + 1;
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for (int slot = 0; slot < fp->slots_per_frame; slot++) {
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for (int symb = 0; symb < fp->symbols_per_slot; symb++) {
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uint8_t reset = 1;
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uint32_t x1 = 0;
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uint64_t temp_x2 = ((1UL << 17) * (fp->symbols_per_slot * slot + symb + 1) * ((Nid << 1) + 1) + (Nid << 1));
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uint32_t x2 = temp_x2 % (1U << 31);
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LOG_D(PHY,"PDCCH DMRS slot %d, symb %d, Nid %d, x2 %x\n", slot, symb, Nid, x2);
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for (uint32_t n = 0; n < pdcch_dmrs_init_length; n++) {
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pdcch_dmrs[slot][symb][n] = lte_gold_generic(&x1, &x2, reset);
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reset = 0;
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}
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}
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}
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}
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void nr_init_pdsch_dmrs(PHY_VARS_gNB* gNB, uint8_t nscid, uint32_t Nid)
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{
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NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
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uint32_t ****pdsch_dmrs = gNB->nr_gold_pdsch_dmrs;
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int pdsch_dmrs_init_length = ((fp->N_RB_DL * 12) >> 5) + 1;
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for (int slot = 0; slot < fp->slots_per_frame; slot++) {
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for (int symb = 0; symb < fp->symbols_per_slot; symb++) {
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uint8_t reset = 1;
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uint32_t x1 = 0;
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uint64_t temp_x2 = ((1UL << 17) * (fp->symbols_per_slot * slot + symb + 1) * ((Nid << 1) + 1) + ((Nid << 1) + nscid));
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uint32_t x2 = temp_x2 % (1U << 31);
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LOG_D(PHY,"PDSCH DMRS slot %d, symb %d, Nid %d, nscid %d, x2 %x\n",slot, symb, Nid, nscid, x2);
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for (uint32_t n = 0; n < pdsch_dmrs_init_length; n++) {
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pdsch_dmrs[slot][symb][nscid][n] = lte_gold_generic(&x1, &x2, reset);
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reset = 0;
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}
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}
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}
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}
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void nr_gold_pusch(PHY_VARS_gNB* gNB, int nscid, uint32_t nid)
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{
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NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
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int pusch_dmrs_init_length = ((fp->N_RB_UL * 12) >> 5) + 1;
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for (int ns = 0; ns < fp->slots_per_frame; ns++) {
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for (int l = 0; l < fp->symbols_per_slot; l++) {
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int reset = 1;
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uint32_t x1 = 0;
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uint64_t temp_x2 = ((1UL << 17) * (fp->symbols_per_slot * ns + l + 1) * ((nid << 1) + 1) + ((nid << 1) + nscid));
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uint32_t x2 = temp_x2 % (1U << 31);
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LOG_D(PHY,"DMRS slot %d, symb %d, nscid %d, nid %d, x2 %x\n", ns, l, nscid, nid, x2);
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for (int n = 0; n < pusch_dmrs_init_length; n++) {
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gNB->nr_gold_pusch_dmrs[nscid][ns][l][n] = lte_gold_generic(&x1, &x2, reset);
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reset = 0;
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}
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}
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}
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}
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void nr_init_prs(PHY_VARS_gNB* gNB)
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{
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unsigned int x1 = 0, x2 = 0;
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uint16_t Nid;
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NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
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gNB->nr_gold_prs = (uint32_t ****)malloc16(gNB->prs_vars.NumPRSResources*sizeof(uint32_t ***));
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uint32_t ****prs = gNB->nr_gold_prs;
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AssertFatal(prs!=NULL, "NR init: positioning reference signal malloc failed\n");
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for (int rsc=0; rsc < gNB->prs_vars.NumPRSResources; rsc++) {
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prs[rsc] = (uint32_t ***)malloc16(fp->slots_per_frame*sizeof(uint32_t **));
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AssertFatal(prs[rsc]!=NULL, "NR init: positioning reference signal for rsc %d - malloc failed\n", rsc);
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for (int slot=0; slot<fp->slots_per_frame; slot++) {
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prs[rsc][slot] = (uint32_t **)malloc16(fp->symbols_per_slot*sizeof(uint32_t *));
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AssertFatal(prs[rsc][slot]!=NULL, "NR init: positioning reference signal for slot %d - malloc failed\n", slot);
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for (int symb=0; symb<fp->symbols_per_slot; symb++) {
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prs[rsc][slot][symb] = (uint32_t *)malloc16(NR_MAX_PRS_INIT_LENGTH_DWORD*sizeof(uint32_t));
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AssertFatal(prs[rsc][slot][symb]!=NULL, "NR init: positioning reference signal for rsc %d slot %d symbol %d - malloc failed\n", rsc, slot, symb);
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}
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}
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}
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uint8_t reset;
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uint8_t slotNum, symNum, rsc_id;
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for (rsc_id = 0; rsc_id < gNB->prs_vars.NumPRSResources; rsc_id++) {
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Nid = gNB->prs_vars.prs_cfg[rsc_id].NPRSID; // seed value
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LOG_I(PHY, "Initiaized NR-PRS sequence with PRS_ID %3d for resource %d\n", Nid, rsc_id);
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for (slotNum = 0; slotNum < fp->slots_per_frame; slotNum++) {
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for (symNum = 0; symNum < fp->symbols_per_slot ; symNum++) {
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reset = 1;
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// initial x2 for prs as ts138.211
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uint32_t c_init1, c_init2, c_init3;
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uint32_t pow22=1<<22;
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uint32_t pow10=1<<10;
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c_init1 = pow22*ceil(Nid/1024);
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c_init2 = pow10*(slotNum+symNum+1)*(2*(Nid%1024)+1);
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c_init3 = Nid%1024;
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x2 = c_init1 + c_init2 + c_init3;
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for (uint8_t n=0; n<NR_MAX_PRS_INIT_LENGTH_DWORD; n++) {
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gNB->nr_gold_prs[rsc_id][slotNum][symNum][n] = lte_gold_generic(&x1, &x2, reset);
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reset = 0;
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//printf("%d \n",gNB->nr_gold_prs[slotNum][symNum][n]);
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}
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}
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}
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}
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}
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