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generate 7.5KHz tables

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This commit is contained in:
laurent
2018-08-31 10:46:36 +02:00
parent 16314f041f
commit 4221816f5e
6 changed files with 91 additions and 165 deletions
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cmake_targets/CMakeLists.txt
+1
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@@ -1137,6 +1137,7 @@ set(PHY_SRC_RU
${OPENAIR1_DIR}/PHY/LTE_TRANSPORT/if5_tools.c
${OPENAIR1_DIR}/PHY/MODULATION/slot_fep_ul.c
${OPENAIR1_DIR}/PHY/MODULATION/ul_7_5_kHz.c
${OPENAIR1_DIR}/PHY/MODULATION/gen_75KHz.cpp
${OPENAIR1_DIR}/PHY/MODULATION/beamforming.c
${OPENAIR1_DIR}/PHY/MODULATION/compute_bf_weights.c
${OPENAIR1_DIR}/PHY/INIT/lte_init_ru.c
openair1/PHY/MODULATION/gen_75KHz.cpp
+78
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@@ -0,0 +1,78 @@
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <malloc.h>
#include <assert.h>
#include <complex>
#include <cmath>
#include <map>
#include <PHY/MODULATION/modulation_extern.h>
using namespace std;
void gen_sig(int RB, int len, double ratio, int16_t *table_n, int16_t *table_e ) {
double samplerate = 30.72e6*ratio;
double ofdm_size = 2048*ratio;
double PI = std::acos(-1);
std::complex<int> tt;
complex<double> t[len];
int index=0;
double cp0 = 160*ratio;
double cp = 144*ratio;
for (int i=-cp0; i<ofdm_size; i++)
t[index++] = polar( 32767.0, -2*PI*i*7.5e3/samplerate);
for(int x=0 ; x <6 ; x++)
for (int i=-cp; i<ofdm_size; i++)
t[index++] = polar( 32767.0, -2*PI*i*7.5e3/samplerate);
for (int i=0; i < len ; i++) {
table_n[i*2] = floor(real(t[i]));
table_n[i*2+1] = floor(imag(t[i]));
}
index=0;
double cpe = 512*ratio;
for(int x=0 ; x <6 ; x++)
for (int i=-cpe; i<ofdm_size; i++)
t[index++] = polar( 32767.0, -2*PI*i*7.5e3/samplerate);
for (int i=0; i < len ; i++) {
table_e[i*2] = floor(real(t[i]));
table_e[i*2+1] = floor(imag(t[i]));
}
}
int16_t *s6n_kHz_7_5;
int16_t *s6e_kHz_7_5;
int16_t *s15n_kHz_7_5;
int16_t *s15e_kHz_7_5;
int16_t *s25n_kHz_7_5;
int16_t *s25e_kHz_7_5;
int16_t *s50n_kHz_7_5;
int16_t *s50e_kHz_7_5;
int16_t *s75n_kHz_7_5;
int16_t *s75e_kHz_7_5;
int16_t *s100n_kHz_7_5;
int16_t *s100e_kHz_7_5;
int16_t ** tables[12]={&s6n_kHz_7_5,&s6e_kHz_7_5,
&s15n_kHz_7_5,&s15e_kHz_7_5,
&s25n_kHz_7_5,&s25e_kHz_7_5,
&s50n_kHz_7_5,&s50e_kHz_7_5,
&s75n_kHz_7_5,&s75e_kHz_7_5,
&s100n_kHz_7_5,&s100e_kHz_7_5,};
int tables_size_bytes[12];
#define MyAssert(x) { if(!(x)) { printf("Error in table intialization: %s:%d\n",__FILE__,__LINE__); exit(1);}}
__attribute__((constructor)) static void init_7_5KHz(void) {
const map<int,double> tables_7_5KHz={{6,1.0/16},{15,1.0/8},{25,1.0/4},{50,1.0/2},{75,3.0/4},{100,1.0}};
int tables_idx=0;
for (auto it=tables_7_5KHz.begin(); it!=tables_7_5KHz.end(); ++it) {
int len=15360*it->second;
tables_size_bytes[tables_idx]=sizeof(int16_t)*2*len;
tables_size_bytes[tables_idx+1]=sizeof(int16_t)*2*len;
MyAssert(0==posix_memalign((void**)tables[tables_idx],
16,tables_size_bytes[tables_idx]));
MyAssert(0==posix_memalign((void**)tables[tables_idx+1],
16,tables_size_bytes[tables_idx+1]));
gen_sig(it->first, len, it->second, *tables[tables_idx], *tables[tables_idx+1]);
tables_idx+=2;
}
}
openair1/PHY/MODULATION/gen_7_5_kHz.m
-107
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@@ -1,107 +0,0 @@
function [] = gen_7_5_kHz()
[s6_n2, s6_e2] = gen_sig(6);
[s15_n2, s15_e2] = gen_sig(15);
[s25_n2, s25_e2] = gen_sig(25);
[s50_n2, s50_e2] = gen_sig(50);
[s75_n2, s75_e2] = gen_sig(75);
[s100_n2, s100_e2] = gen_sig(100);
fd=fopen("kHz_7_5.h","w");
fprintf(fd,"s16 s6n_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s6_n2));
fprintf(fd,"%d,",s6_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s6_n2(end));
fprintf(fd,"s16 s6e_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s6_e2));
fprintf(fd,"%d,",s6_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s6_e2(end));
fprintf(fd,"s16 s15n_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s15_n2));
fprintf(fd,"%d,",s15_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s15_n2(end));
fprintf(fd,"s16 s15e_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s15_e2));
fprintf(fd,"%d,",s15_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s15_e2(end));
fprintf(fd,"s16 s25n_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s25_n2));
fprintf(fd,"%d,",s25_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s25_n2(end));
fprintf(fd,"s16 s25e_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s25_e2));
fprintf(fd,"%d,",s25_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s25_e2(end));
fprintf(fd,"s16 s50n_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s50_n2));
fprintf(fd,"%d,",s50_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s50_n2(end));
fprintf(fd,"s16 s50e_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s50_e2));
fprintf(fd,"%d,",s50_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s50_e2(end));
fprintf(fd,"s16 s75n_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s75_n2));
fprintf(fd,"%d,",s75_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s75_n2(end));
fprintf(fd,"s16 s75e_kHz_7_5[%d]__attribute__((aligned(16))) = {",length(s75_e2));
fprintf(fd,"%d,",s75_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s75_e2(end));
fprintf(fd,"s16 s100n_kHz_7_5[%d]__attribute__((aligned(16)))= {",length(s100_n2));
fprintf(fd,"%d,",s100_n2(1:(end-1)));
fprintf(fd,"%d};\n\n",s100_n2(end));
fprintf(fd,"s16 s100e_kHz_7_5[%d]__attribute__((aligned(16)))= {",length(s100_n2));
fprintf(fd,"%d,",s100_e2(1:(end-1)));
fprintf(fd,"%d};\n\n",s100_e2(end));
fclose(fd);
end
function [s_n2, s_e2] = gen_sig(RB)
% 20MHz BW
cp0 = 160;
cp = 144;
cpe = 512;
samplerate = 30.72e6;
ofdm_size = 2048;
len = 15360;
switch(RB)
case 6
ratio = 1/16;
case 15
ratio = 1/8;
case 25
ratio = 1/4;
case 50
ratio = 1/2;
case 75
ratio = 3/4;
case 100
ratio = 1;
otherwise
disp("Wrong Number of RB");
end
cp0 = cp0*ratio;
cp = cp*ratio;
cpe = cpe*ratio;
samplerate = samplerate*ratio;
ofdm_size = ofdm_size*ratio;
len = len*ratio;
s_n0 = floor(32767*exp(-sqrt(-1)*2*pi*(-cp0:ofdm_size-1)*7.5e3/samplerate));
s_n1 = floor(32767*exp(-sqrt(-1)*2*pi*(-cp:ofdm_size-1)*7.5e3/samplerate));
s_n = [s_n0 s_n1 s_n1 s_n1 s_n1 s_n1 s_n1];
s_n2 = zeros(1, 2*len);
s_n2(1:2:end) = real(s_n);
s_n2(2:2:end) = imag(s_n);
s_e = floor(32767*exp(-sqrt(-1)*2*pi*(-cpe:ofdm_size-1)*7.5e3/samplerate));
s_e = [s_e s_e s_e s_e s_e s_e];
s_e2 = zeros(1, 2*len);
s_e2(1:2:end) = real(s_e);
s_e2(2:2:end) = imag(s_e);
end
openair1/PHY/MODULATION/kHz_7_5.h
-45
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openair1/PHY/MODULATION/modulation_extern.h
+12 -12
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@@ -19,18 +19,18 @@
* contact@openairinterface.org
*/
extern int16_t s6n_kHz_7_5[1920];
extern int16_t s6e_kHz_7_5[1920];
extern int16_t s15n_kHz_7_5[3840];
extern int16_t s15e_kHz_7_5[3840];
extern int16_t s25n_kHz_7_5[7680];
extern int16_t s25e_kHz_7_5[7680];
extern int16_t s50n_kHz_7_5[15360];
extern int16_t s50e_kHz_7_5[15360];
extern int16_t s75n_kHz_7_5[23040];
extern int16_t s75e_kHz_7_5[23040];
extern int16_t s100n_kHz_7_5[30720];
extern int16_t s100e_kHz_7_5[30720];
extern int16_t *s6n_kHz_7_5;
extern int16_t *s6e_kHz_7_5;
extern int16_t *s15n_kHz_7_5;
extern int16_t *s15e_kHz_7_5;
extern int16_t *s25n_kHz_7_5;
extern int16_t *s25e_kHz_7_5;
extern int16_t *s50n_kHz_7_5;
extern int16_t *s50e_kHz_7_5;
extern int16_t *s75n_kHz_7_5;
extern int16_t *s75e_kHz_7_5;
extern int16_t *s100n_kHz_7_5;
extern int16_t *s100e_kHz_7_5;
extern short conjugate75[8];
openair1/PHY/MODULATION/modulation_vars.h
-1
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@@ -19,7 +19,6 @@
* contact@openairinterface.org
*/
#include "kHz_7_5.h"
short conjugate75[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1} ;
short conjugate75_2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;