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Commit 8cfd5f29 authored by Elena_Lukashova's avatar Elena_Lukashova
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Adding spatial low, medium and high correlation matrices for 2x2 

EPA channel model. -gV, -gW, -gX.
parent 5869ec96
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openair1/SIMULATION/LTE_PHY/dlsim.c
View file @ 8cfd5f29
......@@ -517,6 +517,15 @@ int main(int argc, char **argv)
case 'U':
channel_model = TS_SHIFT;
break;
case 'V':
channel_model=EPA_low;
break;
case 'W':
channel_model=EPA_medium;
break;
case 'X':
channel_model=EPA_high;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
......@@ -618,7 +627,7 @@ int main(int argc, char **argv)
printf("-s Starting SNR, runs from SNR to SNR+%.1fdB in steps of %.1fdB. If n_frames is 1 then just SNR is simulated and MATLAB/OCTAVE output is generated\n", snr_int, snr_step);
printf("-f step size of SNR, default value is 1.\n");
printf("-r resource block allocation (see section 7.1.6.3 in 36.213\n");
printf("-g Channel model, possible values are 3GPP 25.814 SCM-A/B/C/D('A','B','C','D'), 36-101 EPA('E'), EVA ('F'),ETU('G'), Rayghleigh8 ('H'), Rayleigh1('I'), Rayleigh1_corr('J'), Rayleigh1_anticorr('K'), Rice8('L'), Rice1('M'), AWGN('N'), Rayleigh1_orthogonal('P'), Rayleigh1_orth_eff_ch_TM4_prec_real ('Q'), Rayleigh1_orth_eff_ch_TM4_prec_imag ('R'), Rayleigh8_orth_eff_ch_TM4_prec_real ('S'),Rayleigh8_orth_eff_ch_TM4_prec_imag ('T') \n");
printf("-g Channel model, possible values are 3GPP 25.814 SCM-A/B/C/D('A','B','C','D'), 36-101 EPA('E'), EVA ('F'),ETU('G'), Rayghleigh8 ('H'), Rayleigh1('I'), Rayleigh1_corr('J'), Rayleigh1_anticorr('K'), Rice8('L'), Rice1('M'), AWGN('N'), Rayleigh1_orthogonal('P'), Rayleigh1_orth_eff_ch_TM4_prec_real ('Q'), Rayleigh1_orth_eff_ch_TM4_prec_imag ('R'), Rayleigh8_orth_eff_ch_TM4_prec_real ('S'),Rayleigh8_orth_eff_ch_TM4_prec_imag ('T'), EPA_low ('V'), EPA_medium ('W'), EPA_high ('X') \n");
printf("-F forgetting factor (0 new channel every trial, 1 channel constant\n");
printf("-x Transmission mode (1,2,6 for the moment)\n");
printf("-y Number of TX antennas used in eNB\n");
......
openair1/SIMULATION/TOOLS/defs.h
View file @ 8cfd5f29
......@@ -183,6 +183,9 @@ typedef enum {
Rayleigh8_orth_eff_ch_TM4_prec_real,
Rayleigh8_orth_eff_ch_TM4_prec_imag,
TS_SHIFT,
EPA_low,
EPA_medium,
EPA_high,
} SCM_t;
/**
......
openair1/SIMULATION/TOOLS/random_channel.c
View file @ 8cfd5f29
......@@ -224,6 +224,25 @@ struct complex R_sqrt_22_orth_eff_ch_TM4_prec_imag_tap[16] = {{0.70711,0.0}, {0.
{0.0, 0.0}, {0.0,0.70711}, {0.0, 0.0}, {-0.70711,0.0}};
struct complex *R_sqrt_22_orth_eff_ch_TM4_prec_imag[1] = {R_sqrt_22_orth_eff_ch_TM4_prec_imag_tap};
//Correlation matrix for EPA channel
struct complex R_sqrt_22_EPA_low_tap[16] = {{1.0,0.0}, {0.0,0.0}, {0.0,0.0}, {0.0,0.0},
{0.0,0.0}, {1.0,0.0}, {0.0,0.0}, {0.0,0.0},
{0.0,0.0}, {0.0,0.0}, {1.0,0.0}, {0.0,0.0},
{0.0,0.0}, {0.0,0.0}, {0.0,0.0}, {1.0,0.0}};
struct complex *R_sqrt_22_EPA_low[1] = {R_sqrt_22_EPA_low_tap};
struct complex R_sqrt_22_EPA_high_tap[16] = {{0.7179,0.0}, {0.4500,0.0}, {0.4500,0.0}, {0.2821,0.0},
{0.4500,0.0}, {0.7179,0.0}, {0.2821,0.0}, {0.4500,0.0},
{0.4500,0.0}, {0.2821,0.0}, {0.7179,0.0}, {0.4500,0.0},
{0.2821,0.0}, {0.4500,0.0}, {0.4500,0.0}, {0.7179,0.0}};
struct complex *R_sqrt_22_EPA_high[1] = {R_sqrt_22_EPA_high_tap};
struct complex R_sqrt_22_EPA_medium_tap[16] = {{0.8375,0.0}, {0.5249,0.0}, {0.1286,0.0}, {0.0806,0.0},
{0.5249,0.0}, {0.8375,0.0}, {0.0806,0.0}, {0.1286,0.0},
{0.1286,0.0}, {0.0806,0.0}, {0.8375,0.0}, {0.5249,0.0},
{0.0806,0.0}, {0.1286,0.0}, {0.5249,0.0}, {0.8375,0.0}};
struct complex *R_sqrt_22_EPA_medium[1] = {R_sqrt_22_EPA_medium_tap};
//Rayleigh1_orth_eff_ch_TM4
......@@ -408,6 +427,140 @@ channel_desc_t *new_channel_desc_scm(uint8_t nb_tx,
}
}
break;
case EPA_low:
chan_desc->nb_taps = 7;
chan_desc->Td = .410;
chan_desc->channel_length = (int) (2*chan_desc->sampling_rate*chan_desc->Td + 1 + 2/(M_PI*M_PI)*log(4*M_PI*chan_desc->sampling_rate*chan_desc->Td));
sum_amps = 0;
chan_desc->amps = (double*) malloc(chan_desc->nb_taps*sizeof(double));
for (i = 0; i<chan_desc->nb_taps; i++) {
chan_desc->amps[i] = pow(10,.1*epa_amps_dB[i]);
sum_amps += chan_desc->amps[i];
}
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->amps[i] /= sum_amps;
chan_desc->delays = epa_delays;
chan_desc->ricean_factor = 1;
chan_desc->aoa = 0;
chan_desc->random_aoa = 0;
chan_desc->ch = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->chF = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->a = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex*));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->ch[i] = (struct complex*) malloc(chan_desc->channel_length * sizeof(struct complex));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->chF[i] = (struct complex*) malloc(1200 * sizeof(struct complex));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->a[i] = (struct complex*) malloc(nb_tx*nb_rx * sizeof(struct complex));
if (nb_tx==2 && nb_rx==2) {
chan_desc->R_sqrt = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex**));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->R_sqrt[i] = R_sqrt_22_EPA_low[0];
}
else {
printf("Correlation matrices are implemented for 2 x 2 only");
}
/*else {
chan_desc->R_sqrt = (struct complex**) malloc(6*sizeof(struct complex**));
for (i = 0; i<6; i++) {
chan_desc->R_sqrt[i] = (struct complex*) malloc(nb_tx*nb_rx*nb_tx*nb_rx * sizeof(struct complex));
for (j = 0; j<nb_tx*nb_rx*nb_tx*nb_rx; j+=(nb_tx*nb_rx+1)) {
chan_desc->R_sqrt[i][j].x = 1.0;
chan_desc->R_sqrt[i][j].y = 0.0;
}
LOG_W(OCM,"correlation matrix only implemented for nb_tx==2 and nb_rx==2, using identity\n");
}
}*/
break;
case EPA_high:
chan_desc->nb_taps = 7;
chan_desc->Td = .410;
chan_desc->channel_length = (int) (2*chan_desc->sampling_rate*chan_desc->Td + 1 + 2/(M_PI*M_PI)*log(4*M_PI*chan_desc->sampling_rate*chan_desc->Td));
sum_amps = 0;
chan_desc->amps = (double*) malloc(chan_desc->nb_taps*sizeof(double));
for (i = 0; i<chan_desc->nb_taps; i++) {
chan_desc->amps[i] = pow(10,.1*epa_amps_dB[i]);
sum_amps += chan_desc->amps[i];
}
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->amps[i] /= sum_amps;
chan_desc->delays = epa_delays;
chan_desc->ricean_factor = 1;
chan_desc->aoa = 0;
chan_desc->random_aoa = 0;
chan_desc->ch = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->chF = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->a = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex*));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->ch[i] = (struct complex*) malloc(chan_desc->channel_length * sizeof(struct complex));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->chF[i] = (struct complex*) malloc(1200 * sizeof(struct complex));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->a[i] = (struct complex*) malloc(nb_tx*nb_rx * sizeof(struct complex));
if (nb_tx==2 && nb_rx==2) {
chan_desc->R_sqrt = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex**));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->R_sqrt[i] = R_sqrt_22_EPA_high[0];
}
else {
printf("Correlation matrices are implemented for 2 x 2 only");
}
/*else {
chan_desc->R_sqrt = (struct complex**) malloc(6*sizeof(struct complex**));
for (i = 0; i<6; i++) {
chan_desc->R_sqrt[i] = (struct complex*) malloc(nb_tx*nb_rx*nb_tx*nb_rx * sizeof(struct complex));
for (j = 0; j<nb_tx*nb_rx*nb_tx*nb_rx; j+=(nb_tx*nb_rx+1)) {
chan_desc->R_sqrt[i][j].x = 1.0;
chan_desc->R_sqrt[i][j].y = 0.0;
}
LOG_W(OCM,"correlation matrix only implemented for nb_tx==2 and nb_rx==2, using identity\n");
}
}*/
break;
case EPA_medium:
chan_desc->nb_taps = 7;
chan_desc->Td = .410;
chan_desc->channel_length = (int) (2*chan_desc->sampling_rate*chan_desc->Td + 1 + 2/(M_PI*M_PI)*log(4*M_PI*chan_desc->sampling_rate*chan_desc->Td));
sum_amps = 0;
chan_desc->amps = (double*) malloc(chan_desc->nb_taps*sizeof(double));
for (i = 0; i<chan_desc->nb_taps; i++) {
chan_desc->amps[i] = pow(10,.1*epa_amps_dB[i]);
sum_amps += chan_desc->amps[i];
}
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->amps[i] /= sum_amps;
chan_desc->delays = epa_delays;
chan_desc->ricean_factor = 1;
chan_desc->aoa = 0;
chan_desc->random_aoa = 0;
chan_desc->ch = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->chF = (struct complex**) malloc(nb_tx*nb_rx*sizeof(struct complex*));
chan_desc->a = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex*));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->ch[i] = (struct complex*) malloc(chan_desc->channel_length * sizeof(struct complex));
for (i = 0; i<nb_tx*nb_rx; i++)
chan_desc->chF[i] = (struct complex*) malloc(1200 * sizeof(struct complex));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->a[i] = (struct complex*) malloc(nb_tx*nb_rx * sizeof(struct complex));
if (nb_tx==2 && nb_rx==2) {
chan_desc->R_sqrt = (struct complex**) malloc(chan_desc->nb_taps*sizeof(struct complex**));
for (i = 0; i<chan_desc->nb_taps; i++)
chan_desc->R_sqrt[i] = R_sqrt_22_EPA_medium[0];
} else {
printf("Correlation matrices are implemented for 2 x 2 only");
}
/*else {
chan_desc->R_sqrt = (struct complex**) malloc(6*sizeof(struct complex**));
for (i = 0; i<6; i++) {
chan_desc->R_sqrt[i] = (struct complex*) malloc(nb_tx*nb_rx*nb_tx*nb_rx * sizeof(struct complex));
for (j = 0; j<nb_tx*nb_rx*nb_tx*nb_rx; j+=(nb_tx*nb_rx+1)) {
chan_desc->R_sqrt[i][j].x = 1.0;
chan_desc->R_sqrt[i][j].y = 0.0;
}
LOG_W(OCM,"correlation matrix only implemented for nb_tx==2 and nb_rx==2, using identity\n");
}
}*/
break;
case EVA:
chan_desc->nb_taps = 9;
chan_desc->Td = 2.51;
......
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