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/*
* file mkmscmap.c
*
* makes MSC_Demapper
*
* cf create_MSC_demapper.m matlab code by
* Torsten Schorr 2004
*
* recoded in C by PA0MBO - M.Bos
*
* date Feb 21st 2009
*
*/
/*************************************************************************
*
* PA0MBO
*
* COPYRIGHT (C) 2009 M.Bos
*
* This file is part of the distribution package RXAMADRM
*
* This package is free software and you can redistribute is
* and/or modify it under the terms of the GNU General Public License
*
* More details can be found in the accompanying file COPYING
*************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <math.h>
#include <malloc.h>
#include "drmdefs.h"
#include "structtemplates.h"
#include "drmproto.h"
extern int symbols_per_frame_list[4];
extern int time_ref_cells_k_list[4][21];
extern int y_list[4];
extern int K_min_K_max_list[2][24];
extern int freq_ref_cells_k_list[4][3];
extern int x_list[4];
extern int k0_list[4];
extern int mode_and_occupancy_code_table[24];
extern int time_ref_cells_cnt_list[4];
extern int lFAC;
extern int MSC_Demapper[6][2959];
int
mkmscmap(int robustness_mode, int spectrum_occupancy, int interleaver_depth,
int K_dc, int K_modulo)
{
int frames_per_superframe = 3;
int K_min;
int K_max;
int mode_and_occupancy_code;
int x, y, k0;
int s;
// int Tu;
int gain_ref_cells_k[712];
int unused_carriers_k[3];
int i, m, j;
int first_symbol;
int control_cells_k[65];
int pilot_cells_k[600];
int cnt_msc_cells = 0;
int rndcnt, cnt_time_ref_cells;
int n, k, p, p_min, p_max;
int contains;
int term;
int N_SFA, N_L, N_MUX, D;
int cnt_msc_cells_3_superframes;
static int *PICMSC_inv = NULL;
int step, ncGIMSC;
// int nrGIMSC;
int columnv[5];
int rowv[1000];
int vproduct[5][1000];
int GIMSC_inv[5000];
int cnt_GIMSC;
int Cell_Deinterleaver[5000];
int FAC_cells_k[65]; /* reeds global */
// int Tu_list[] = { Tu_A, Tu_B, Tu_C, Tu_D };
int symbols_per_frame;
int freq_ref_cells_k[3];
int time_ref_cells_k[21];
// int carrier_per_symbol;
int MSC_cells_k[8877];
int MSC_cells_3_superframes[3 * 8877];
// Tu = Tu_list[robustness_mode];
K_min = K_min_K_max_list[0][spectrum_occupancy + robustness_mode * 6];
K_max = K_min_K_max_list[1][spectrum_occupancy + robustness_mode * 6];
mode_and_occupancy_code =
mode_and_occupancy_code_table[robustness_mode * 6 + spectrum_occupancy];
if (mode_and_occupancy_code < 0)
{
printf("BAD MODE AND OCCUPANCY CODE \n");
}
symbols_per_frame = symbols_per_frame_list[robustness_mode];
// carrier_per_symbol = K_max - K_min + 1;
x = x_list[robustness_mode];
y = y_list[robustness_mode];
k0 = k0_list[robustness_mode];
rndcnt = 0;
for (s = 0; s < symbols_per_frame; s++)
{
n = s % y;
m = s / y;
p_min = (int) ceil((double) ((K_min - k0 - x * n) / (x * y)));
p_max = (K_max - k0 - x * n) / (x * y);
for (p = p_min; p <= p_max; p++)
{
k = k0 + x * n + x * y * p;
gain_ref_cells_k[rndcnt++] = k + s * K_modulo;
/* printf("gain_ref_cells_k[%d] = %d\n", rndcnt-1, gain_ref_cells_k[rndcnt-1]); */
}
}
unused_carriers_k[0] = 0;
if (robustness_mode == 0)
{
unused_carriers_k[1] = 1;
}
for (i = 0; i < 3; i++)
{
freq_ref_cells_k[i] = freq_ref_cells_k_list[robustness_mode][i];
}
cnt_time_ref_cells = time_ref_cells_cnt_list[robustness_mode];
for (i = 0; i < cnt_time_ref_cells; i++)
{
time_ref_cells_k[i] = time_ref_cells_k_list[robustness_mode][i];
}
lFAC = mkfacmap(robustness_mode, 0, K_modulo, FAC_cells_k);
/* MSC cells per superframe */
first_symbol = 0;
cnt_msc_cells = 0;
for (m = 0; m < frames_per_superframe; m++)
{
for (i = 0; i < lFAC; i++)
{
control_cells_k[i] =
FAC_cells_k[i] + K_modulo * symbols_per_frame * m;
/* printf("control_cells_k[%d] = %d FAC_cells_k %d K_modulo %d symbols_per_frame %d m %d \n",
i, control_cells_k[i], FAC_cells_k[i], K_modulo, symbols_per_frame, m); */
}
for (j = 3; j < cnt_time_ref_cells + 3; j++)
{
pilot_cells_k[j] =
K_modulo * symbols_per_frame * m + time_ref_cells_k[j - 3];
}
for (j = 3 + cnt_time_ref_cells; j < 3 + cnt_time_ref_cells + rndcnt;
j++)
{
pilot_cells_k[j] =
K_modulo * symbols_per_frame * m + gain_ref_cells_k[j - 3 -
cnt_time_ref_cells];
}
for (s = first_symbol; s < symbols_per_frame; s++)
{
for (j = 0; j < 3; j++)
{
pilot_cells_k[j] =
K_modulo * symbols_per_frame * m + K_modulo * s +
freq_ref_cells_k[j];
}
for (k = K_min; k <= K_max; k++)
{
contains = 0;
term = k + K_modulo * symbols_per_frame * m + K_modulo * s;
for (j = 0; j < 3 + cnt_time_ref_cells + rndcnt; j++)
{
if (term == pilot_cells_k[j])
{
contains = 1;
goto uit;
}
}
for (j = 0; j < lFAC; j++)
{
if (term == control_cells_k[j])
{
contains = 1;
goto uit;
}
}
if (robustness_mode == 0)
{
for (j = 0; j < 1; j++)
{
if (term ==
K_modulo * symbols_per_frame * m + K_modulo * s +
unused_carriers_k[j])
{
contains = 1;
goto uit;
}
}
}
else
{
if (term == K_modulo * symbols_per_frame * m + K_modulo * s) /* pa0mbo 29-11-2007 was + unused_carriers_k[0] */
{
contains = 1;
goto uit;
}
}
uit:if (contains == 0)
{
MSC_cells_k[cnt_msc_cells++] = term;
/* debugging
printf("%d cell=%d \n", cnt_msc_cells, MSC_cells_k[cnt_msc_cells -1]); */
}
} /* end k-loop */
} /* end s-loop */
first_symbol = 0;
} /* end m -loop */
N_SFA = cnt_msc_cells;
N_L = N_SFA % frames_per_superframe;
N_MUX = (N_SFA - N_L) / frames_per_superframe;
/* cell interleaver for MSC_cells */
cnt_msc_cells_3_superframes = 0;
for (i = 0; i < N_SFA - N_L; i++)
{
MSC_cells_3_superframes[cnt_msc_cells_3_superframes++] = K_dc + MSC_cells_k[i];
}
for (i = 0; i < N_SFA - N_L; i++)
{
MSC_cells_3_superframes[cnt_msc_cells_3_superframes++] =
K_dc + symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_k[i];
}
for (i = 0; i < N_SFA - N_L; i++)
{
MSC_cells_3_superframes[cnt_msc_cells_3_superframes++] =
K_dc + 2 * symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_k[i];
}
/* for (i=0; i < cnt_msc_cells_3_superframes; i++)
printf("MSC_cells3..[%d] = %d\n", i, MSC_cells_3_superframes[i]);
printf("====\n"); */
if (PICMSC_inv != NULL) free(PICMSC_inv);
PICMSC_inv = deinterleaver(0, 1, N_MUX, 5);
if (interleaver_depth == 0)
{
/* convolutional deinterleaver
ETSI ES 201980 / 7.6 */
D = 5;
/* calc of GIMSC_inv in steps */
/* first step [1:N_MUX+1:D*(N_MUX+1)] */
step = N_MUX + 1;
// nrGIMSC = D;
ncGIMSC = (int) ceil((float) N_MUX / D);
/* printf("ncGIMSC = %d\n", ncGIMSC); */
columnv[0] = 1;
rowv[0] = 0;
for (i = 1; i < D; i++)
columnv[i] = columnv[i - 1] + step;
for (i = 1; i < ncGIMSC; i++)
rowv[i] = rowv[i - 1] + D;
for (i = 0; i < D; i++)
{
for (j = 0; j < ncGIMSC; j++)
{
vproduct[i][j] = columnv[i] + rowv[j];
}
}
cnt_GIMSC = 0;
for (j = 0; j < ncGIMSC; j++)
{
for (i = 0; i < D; i++)
{
GIMSC_inv[cnt_GIMSC++] = vproduct[i][j];
/* printf("GIMSC_inv[%d] = %d \n", cnt_GIMSC-1, vproduct[i][j]); */
}
}
cnt_GIMSC--;
/* printf("xxx Cell_Deinterleaver\n"); */
for (i = 0; i < N_MUX; i++)
{
Cell_Deinterleaver[i] = GIMSC_inv[PICMSC_inv[i]];
/* printf("%d \n", Cell_Deinterleaver[i]); */
}
/* printf("xxx\n"); */
for (i = 0; i < N_MUX; i++)
{
MSC_Demapper[5][i] =
MSC_cells_3_superframes[Cell_Deinterleaver[i] - 1];
MSC_Demapper[0][i] =
((MSC_cells_3_superframes[N_MUX + Cell_Deinterleaver[i] - 1] +
1) % (2 * symbols_per_frame * frames_per_superframe *
K_modulo)) - 1;
MSC_Demapper[1][i] =
((MSC_cells_3_superframes[2 * N_MUX + Cell_Deinterleaver[i] - 1] +
1) % (2 * symbols_per_frame * frames_per_superframe *
K_modulo)) - 1;
MSC_Demapper[2][i] =
((symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[Cell_Deinterleaver[i] - 1] +
1) % (2 * symbols_per_frame * frames_per_superframe *
K_modulo)) - 1;
MSC_Demapper[3][i] =
((symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[N_MUX + Cell_Deinterleaver[i] - 1] +
1) % (2 * symbols_per_frame * frames_per_superframe *
K_modulo)) - 1;
MSC_Demapper[4][i] =
((symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[2 * N_MUX + Cell_Deinterleaver[i] - 1] +
1) % (2 * symbols_per_frame * frames_per_superframe *
K_modulo)) - 1;
}
}
else
{
/* printf("xxx Cell_Deinterleaver\n"); */
for (i = 0; i < N_MUX; i++)
{
Cell_Deinterleaver[i] = PICMSC_inv[i];
/* printf("%d \n", Cell_Deinterleaver[i]); */
}
/* printf("xxx\n"); */
/* printf("xxxx MSC_Demap[1]\n"); */
for (i = 0; i < N_MUX; i++)
{
MSC_Demapper[1][i] = MSC_cells_3_superframes[Cell_Deinterleaver[i]]; /* pa0mbo -1 binnen [] weggehaald */
/* printf("%d \n", MSC_Demapper[1][i]); */
MSC_Demapper[2][i] =
(MSC_cells_3_superframes[N_MUX + Cell_Deinterleaver[i]]) % (2 *
symbols_per_frame
*
frames_per_superframe
*
K_modulo);
MSC_Demapper[3][i] =
(MSC_cells_3_superframes[2 * N_MUX + Cell_Deinterleaver[i]]) %
(2 * symbols_per_frame * frames_per_superframe * K_modulo);
MSC_Demapper[4][i] =
(symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[Cell_Deinterleaver[i]]) % (2 *
symbols_per_frame
*
frames_per_superframe
* K_modulo);
MSC_Demapper[5][i] =
(symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[N_MUX +
Cell_Deinterleaver[i]]) % (2 *
symbols_per_frame
*
frames_per_superframe
* K_modulo);
MSC_Demapper[0][i] =
(symbols_per_frame * frames_per_superframe * K_modulo +
MSC_cells_3_superframes[2 * N_MUX +
Cell_Deinterleaver[i]]) % (2 *
symbols_per_frame
*
frames_per_superframe
* K_modulo);
}
}
return N_MUX;
}
|
