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openairinterface5g/openair1/PHY/LTE_REFSIG/lte_ul_ref.c
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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"
uint16_t dftsizes[34] = {12,24,36,48,60,72,96,108,120,144,180,192,216,240,288,300,324,360,384,432,480,540,576,600,648,720,768,864,900,960,972,1080,1152,1200};
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 */
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 */
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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