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openairinterface5g/openair1/PHY/LTE_REFSIG/lte_ul_ref.c
T
laurent b339460666 cleanup only
2023-04-28 16:25:24 +02:00

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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#ifdef MAIN
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#endif
#include "lte_refsig.h"
#include "PHY/defs_eNB.h"
#include "openair1/PHY/LTE_TRANSPORT/transport_vars.h"
static const uint16_t ref_primes[34] = {11, 23, 31, 47, 59, 71, 89, 107, 113, 139, 179, 191, 211, 239, 283, 293, 317,
359, 383, 431, 479, 523, 571, 599, 647, 719, 761, 863, 887, 953, 971, 1069, 1151, 1193};
int16_t *ul_ref_sigs[30][2][34];
int16_t *ul_ref_sigs_rx[30][2][34]; //these contain the sequences in repeated format and quantized to QPSK ifdef IFFT_FPGA
/* 36.211 table 5.5.1.2-1 */
static const char ref12[360] = {
-1, 1, 3, -3, 3, 3, 1, 1, 3, 1, -3, 3, 1, 1, 3, 3, 3, -1, 1, -3, -3, 1, -3, 3, 1, 1, -3, -3, -3, -1,
-3, -3, 1, -3, 1, -1, -1, 1, 1, 1, 1, -1, -3, -3, 1, -3, 3, -1, -1, 3, 1, -1, 1, -1, -3, -1, 1, -1, 1, 3,
1, -3, 3, -1, -1, 1, 1, -1, -1, 3, -3, 1, -1, 3, -3, -3, -3, 3, 1, -1, 3, 3, -3, 1, -3, -1, -1, -1, 1, -3,
3, -1, 1, -3, 3, 1, 1, -3, 3, 1, -1, -1, -1, 1, 1, 3, -1, 1, 1, -3, -1, 3, 3, -1, -3, 1, 1, 1, 1, 1,
-1, 3, -1, 1, 1, -3, -3, -1, -3, -3, 3, -1, 3, 1, -1, -1, 3, 3, -3, 1, 3, 1, 3, 3, 1, -3, 1, 1, -3, 1,
1, 1, -3, -3, -3, 1, 3, 3, -3, 3, -3, 1, 1, 3, -1, -3, 3, 3, -3, 1, -1, -3, -1, 3, 1, 3, 3, 3, -1, 1,
3, -1, 1, -3, -1, -1, 1, 1, 3, 1, -1, -3, 1, 3, 1, -1, 1, 3, 3, 3, -1, -1, 3, -1, -3, 1, 1, 3, -3, 3,
-3, -3, 3, 1, 3, -1, -3, 3, 1, 1, -3, 1, -3, -3, -1, -1, 1, -3, -1, 3, 1, 3, 1, -1, -1, 3, -3, -1, -3, -1,
-1, -3, 1, 1, 1, 1, 3, 1, -1, 1, -3, -1, -1, 3, -1, 1, -3, -3, -3, -3, -3, 1, -1, -3, 1, 1, -3, -3, -3, -3,
-1, 3, -3, 1, -3, 3, 1, 1, -1, -3, -1, -3, 1, -1, 1, 3, -1, 1, 1, 1, 3, 1, 3, 3, -1, 1, -1, -3, -3, 1,
1, -3, 3, 3, 1, 3, 3, 1, -3, -1, -1, 3, 1, 3, -3, -3, 3, -3, 1, -1, -1, 3, -1, -3, -3, -1, -3, -1, -3, 3,
1, -1, 1, 3, -3, -3, -1, 3, -3, 3, -1, 3, 3, -3, 3, 3, -1, -1, 3, -3, -3, -1, -1, -3, -1, 3, -3, 3, 1, -1};
/* 36.211 table 5.5.1.2-2 */
static const char ref24[720] = {
-1, 3, 1, -3, 3, -1, 1, 3, -3, 3, 1, 3, -3, 3, 1, 1, -1, 1, 3, -3, 3, -3, -1, -3, -3, 3, -3, -3, -3, 1, -3, -3,
3, -1, 1, 1, 1, 3, 1, -1, 3, -3, -3, 1, 3, 1, 1, -3, 3, -1, 3, 3, 1, 1, -3, 3, 3, 3, 3, 1, -1, 3, -1, 1,
1, -1, -3, -1, -1, 1, 3, 3, -1, -3, 1, 1, 3, -3, 1, 1, -3, -1, -1, 1, 3, 1, 3, 1, -1, 3, 1, 1, -3, -1, -3, -1,
-1, -1, -1, -3, -3, -1, 1, 1, 3, 3, -1, 3, -1, 1, -1, -3, 1, -1, -3, -3, 1, -3, -1, -1, -3, 1, 1, 3, -1, 1, 3, 1,
-3, 1, -3, 1, 1, -1, -1, 3, -1, -3, 3, -3, -3, -3, 1, 1, 1, 1, -1, -1, 3, -3, -3, 3, -3, 1, -1, -1, 1, -1, 1, 1,
-1, -3, -1, 1, -1, 3, -1, -3, -3, 3, 3, -1, -1, -3, -1, 3, 1, 3, 1, 3, 1, 1, -1, 3, 1, -1, 1, 3, -3, -1, -1, 1,
-3, 1, 3, -3, 1, -1, -3, 3, -3, 3, -1, -1, -1, -1, 1, -3, -3, -3, 1, -3, -3, -3, 1, -3, 1, 1, -3, 3, 3, -1, -3, -1,
3, -3, 3, 3, 3, -1, 1, 1, -3, 1, -1, 1, 1, -3, 1, 1, -1, 1, -3, -3, 3, -1, 3, -1, -1, -3, -3, -3, -1, -3, -3, 1,
-1, 1, 3, 3, -1, 1, -1, 3, 1, 3, 3, -3, -3, 1, 3, 1, -1, -3, -3, -3, 3, 3, -3, 3, 3, -1, -3, 3, -1, 1, -3, 1,
1, 3, 3, 1, 1, 1, -1, -1, 1, -3, 3, -1, 1, 1, -3, 3, 3, -1, -3, 3, -3, -1, -3, -1, 3, -1, -1, -1, -1, -3, -1, 3,
3, 1, -1, 1, 3, 3, 3, -1, 1, 1, -3, 1, 3, -1, -3, 3, -3, -3, 3, 1, 3, 1, -3, 3, 1, 3, 1, 1, 3, 3, -1, -1,
-3, 1, -3, -1, 3, 1, 1, 3, -1, -1, 1, -3, 1, 3, -3, 1, -1, -3, -1, 3, 1, 3, 1, -1, -3, -3, -1, -1, -3, -3, -3, -1,
-1, -3, 3, -1, -1, -1, -1, 1, 1, -3, 3, 1, 3, 3, 1, -1, 1, -3, 1, -3, 1, 1, -3, -1, 1, 3, -1, 3, 3, -1, -3, 1,
-1, -3, 3, 3, 3, -1, 1, 1, 3, -1, -3, -1, 3, -1, -1, -1, 1, 1, 1, 1, 1, -1, 3, -1, -3, 1, 1, 3, -3, 1, -3, -1,
1, 1, -3, -3, 3, 1, 1, -3, 1, 3, 3, 1, -1, -3, 3, -1, 3, 3, 3, -3, 1, -1, 1, -1, -3, -1, 1, 3, -1, 3, -3, -3,
-1, -3, 3, -3, -3, -3, -1, -1, -3, -1, -3, 3, 1, 3, -3, -1, 3, -1, 1, -1, 3, -3, 1, -1, -3, -3, 1, 1, -1, 1, -1, 1,
-1, 3, 1, -3, -1, 1, -1, 1, -1, -1, 3, 3, -3, -1, 1, -3, -3, -1, -3, 3, 1, -1, -3, -1, -3, -3, 3, -3, 3, -3, -1, 1,
3, 1, -3, 1, 3, 3, -1, -3, -1, -1, -1, -1, 3, 3, 3, 1, 3, 3, -3, 1, 3, -1, 3, -1, 3, 3, -3, 3, 1, -1, 3, 3,
1, -1, 3, 3, -1, -3, 3, -3, -1, -1, 3, -1, 3, -1, -1, 1, 1, 1, 1, -1, -1, -3, -1, 3, 1, -1, 1, -1, 3, -1, 3, 1,
1, -1, -1, -3, 1, 1, -3, 1, 3, -3, 1, 1, -3, -3, -1, -1, -3, -1, 1, 3, 1, 1, -3, -1, -1, -3, 3, -3, 3, 1, -3, 3,
-3, 1, -1, 1, -3, 1, 1, 1, -1, -3, 3, 3, 1, 1, 3, -1, -3, -1, -1, -1, 3, 1, -3, -3, -1, 3, -3, -1, -3, -1, -3, -1,
-1, -3, -1, -1, 1, -3, -1, -1, 1, -1, -3, 1, 1, -3, 1, -3, -3, 3, 1, 1, -1, 3, -1, -1, 1, 1, -1, -1, -3, -1, 3, -1,
3, -1, 1, 3, 1, -1, 3, 1, 3, -3, -3, 1, -1, -1, 1, 3};
void generate_ul_ref_sigs(void) {
double qbar,phase;
unsigned int u,v,Msc_RS,q,m,n;
// These are the Zadoff-Chu sequences (for RB 3-100)
for (Msc_RS=2; Msc_RS<34; Msc_RS++) {
for (u=0; u<30; u++) {
for (v=0; v<2; v++) {
qbar = ref_primes[Msc_RS] * (u+1)/(double)31;
ul_ref_sigs[u][v][Msc_RS] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[Msc_RS]);
if ((((int)floor(2*qbar))&1) == 0)
q = (int)(floor(qbar+.5)) - v;
else
q = (int)(floor(qbar+.5)) + v;
#ifdef MAIN
printf("Msc_RS %u (%d), u %u, v %u -> q %u (qbar %f)\n",Msc_RS,dftsizes[Msc_RS],u,v,q,qbar);
#endif
for (n=0; n<dftsizes[Msc_RS]; n++) {
m=n%ref_primes[Msc_RS];
phase = (double)q*m*(m+1)/ref_primes[Msc_RS];
ul_ref_sigs[u][v][Msc_RS][n<<1] =(int16_t)(floor(32767*cos(M_PI*phase)));
ul_ref_sigs[u][v][Msc_RS][1+(n<<1)] =-(int16_t)(floor(32767*sin(M_PI*phase)));
#ifdef MAIN
if (Msc_RS<5)
printf("(%d,%d) ",ul_ref_sigs[u][v][Msc_RS][n<<1],ul_ref_sigs[u][v][Msc_RS][1+(n<<1)]);
#endif
}
#ifdef MAIN
if (Msc_RS<5)
printf("\n");
#endif
}
}
}
// These are the sequences for RB 1
for (u=0; u<30; u++) {
ul_ref_sigs[u][0][0] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[0]);
for (n=0; n<dftsizes[0]; n++) {
ul_ref_sigs[u][0][0][n<<1] =(int16_t)(floor(32767*cos(M_PI*ref12[(u*12) + n]/4)));
ul_ref_sigs[u][0][0][1+(n<<1)]=(int16_t)(floor(32767*sin(M_PI*ref12[(u*12) + n]/4)));
}
}
// These are the sequences for RB 2
for (u=0; u<30; u++) {
ul_ref_sigs[u][0][1] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[1]);
for (n=0; n<dftsizes[1]; n++) {
ul_ref_sigs[u][0][1][n<<1] =(int16_t)(floor(32767*cos(M_PI*ref24[(u*24) + n]/4)));
ul_ref_sigs[u][0][1][1+(n<<1)]=(int16_t)(floor(32767*sin(M_PI*ref24[(u*24) + n]/4)));
}
}
}
void generate_ul_ref_sigs_rx(void) {
double qbar,phase;
unsigned int u,v,Msc_RS,q,m,n;
// These are the complex conjugated Zadoff-Chu sequences quantized to QPSK stored in repeated format (for RB 3-100)
for (Msc_RS=2; Msc_RS<34; Msc_RS++) {
for (u=0; u<30; u++) {
for (v=0; v<2; v++) {
qbar = ref_primes[Msc_RS] * (u+1)/(double)31;
ul_ref_sigs_rx[u][v][Msc_RS] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[Msc_RS]);
if ((((int)floor(2*qbar))&1) == 0)
q = (int)(floor(qbar+.5)) - v;
else
q = (int)(floor(qbar+.5)) + v;
#ifdef MAIN
printf("Msc_RS %u (%d), u %u, v %u -> q %u (qbar %f)\n",Msc_RS,dftsizes[Msc_RS],u,v,q,qbar);
#endif
for (n=0; n<dftsizes[Msc_RS]; n++) {
m=n%ref_primes[Msc_RS];
phase = (double)q*m*(m+1)/ref_primes[Msc_RS];
ul_ref_sigs_rx[u][v][Msc_RS][n<<1] =(int16_t)(floor(32767*cos(M_PI*phase)));
ul_ref_sigs_rx[u][v][Msc_RS][1+(n<<1)] =-(int16_t)(floor(32767*sin(M_PI*phase)));
#ifdef MAIN
if (Msc_RS<5)
printf("(%d,%d) ",ul_ref_sigs_rx[u][v][Msc_RS][n<<2],ul_ref_sigs_rx[u][v][Msc_RS][1+(n<<2)]);
#endif
}
#ifdef MAIN
if (Msc_RS<5)
printf("\n");
#endif
}
}
}
// These are the sequences for RB 1
for (u=0; u<30; u++) {
ul_ref_sigs_rx[u][0][0] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[0]);
for (n=0; n<dftsizes[0]; n++) {
ul_ref_sigs_rx[u][0][0][n<<1] = (int16_t)(floor(32767*cos(M_PI*ref12[(u*12) + n]/4)));
ul_ref_sigs_rx[u][0][0][1+(n<<1)]= (int16_t)(floor(32767*sin(M_PI*ref12[(u*12) + n]/4)));
}
}
// These are the sequences for RB 2
for (u=0; u<30; u++) {
ul_ref_sigs_rx[u][0][1] = (int16_t *)malloc16(2*sizeof(int16_t)*dftsizes[1]);
for (n=0; n<dftsizes[1]; n++) {
ul_ref_sigs_rx[u][0][1][n<<1] = (int16_t)(floor(32767*cos(M_PI*ref24[(u*24) + n]/4)));
ul_ref_sigs_rx[u][0][1][1+(n<<1)]= (int16_t)(floor(32767*sin(M_PI*ref24[(u*24) + n]/4)));
}
}
}
void free_ul_ref_sigs(void) {
unsigned int u,v,Msc_RS;
for (Msc_RS=0; Msc_RS<34; Msc_RS++) {
for (u=0; u<30; u++) {
for (v=0; v<2; v++) {
if (ul_ref_sigs[u][v][Msc_RS]) {
free16(ul_ref_sigs[u][v][Msc_RS],2*sizeof(int16_t)*dftsizes[Msc_RS]);
ul_ref_sigs[u][v][Msc_RS] = NULL;
}
if (ul_ref_sigs_rx[u][v][Msc_RS]) {
free16(ul_ref_sigs_rx[u][v][Msc_RS],4*sizeof(int16_t)*dftsizes[Msc_RS]);
ul_ref_sigs_rx[u][v][Msc_RS] = NULL;
}
}
}
}
}
#ifdef MAIN
main() {
generate_ul_ref_sigs();
generate_ul_ref_sigs_rx();
free_ul_ref_sigs();
}
#endif
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