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codec2/src/ofdm_mode.c

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/*---------------------------------------------------------------------------*\
FILE........: ofdm_mode.c
AUTHORS.....: David Rowe & Steve Sampson
DATE CREATED: July 2020
Mode specific configuration for OFDM modem.
\*---------------------------------------------------------------------------*/
#include <assert.h>
#include <string.h>
#include "codec2_ofdm.h"
#include "ofdm_internal.h"
void ofdm_init_mode(char mode[], struct OFDM_CONFIG *config) {
assert(mode != NULL);
assert(config != NULL);
assert(strlen(mode) < 16);
strcpy(config->mode, mode);
/* Fill in default values - 700D */
config->nc = 17; /* Number of carriers */
config->np = 1;
config->ns = 8; /* Number of Symbols per modem frame */
config->ts = 0.018f;
config->tcp = .002f; /* Cyclic Prefix duration */
config->tx_centre = 1500.0f; /* TX Carrier Frequency */
config->rx_centre = 1500.0f; /* RX Carrier Frequency */
config->fs = 8000.0f; /* Sample rate */
config->txtbits = 4;
config->bps = 2; /* Bits per Symbol */
config->nuwbits =
5 * config->bps; /* default is 5 symbols of Unique Word bits */
config->bad_uw_errors = 3;
config->ftwindowwidth = 32;
config->timing_mx_thresh = 0.30f;
config->edge_pilots = 1;
config->state_machine = "voice1";
config->data_mode = "";
config->codename = "HRA_112_112";
config->clip_gain1 = 2.5;
config->clip_gain2 = 0.8;
config->clip_en = true;
config->tx_bpf_en = true;
config->rx_bpf_en = false;
config->amp_scale = 245E3;
config->foff_limiter = false;
memset(config->tx_uw, 0, MAX_UW_BITS);
if (strcmp(mode, "700D") == 0) {
} else if (strcmp(mode, "700E") == 0) {
config->ts = 0.014;
config->tcp = 0.006;
config->nc = 21;
config->ns = 4;
config->edge_pilots = 0;
config->nuwbits = 12;
config->bad_uw_errors = 3;
config->txtbits = 2;
config->state_machine = "voice2";
config->amp_est_mode = 1;
config->ftwindowwidth = 80;
config->codename = "HRA_56_56";
config->foff_limiter = true;
config->amp_scale = 155E3;
config->clip_gain1 = 3;
config->clip_gain2 = 0.8;
} else if ((strcmp(mode, "2020") == 0)) {
config->ts = 0.0205;
config->nc = 31;
config->codename = "HRAb_396_504";
config->amp_scale = 167E3;
config->clip_gain1 = 2.5;
config->clip_gain2 = 0.8;
} else if (strcmp(mode, "2020B") == 0) {
config->ts = 0.014;
config->tcp = 0.004;
config->nc = 29;
config->ns = 5;
config->codename = "HRA_56_56";
config->txtbits = 4;
config->nuwbits = 8 * 2;
config->bad_uw_errors = 5;
config->amp_scale = 130E3;
config->clip_gain1 = 2.5;
config->clip_gain2 = 0.8;
config->edge_pilots = 0;
config->state_machine = "voice2";
config->ftwindowwidth = 64;
config->foff_limiter = true;
} else if (strcmp(mode, "qam16") == 0) {
/* not in use yet */
config->ns = 5;
config->np = 5;
config->tcp = 0.004;
config->ts = 0.016;
config->nc = 33;
config->bps = 4;
config->txtbits = 0;
config->nuwbits = 15 * 4;
config->bad_uw_errors = 5;
config->ftwindowwidth = 32;
config->state_machine = "data";
config->amp_est_mode = 1;
config->tx_bpf_en = false;
config->clip_en = false;
config->data_mode = "streaming";
} else if (strcmp(mode, "datac0") == 0) {
config->ns = 5;
config->np = 4;
config->tcp = 0.006;
config->ts = 0.016;
config->nc = 9;
config->edge_pilots = 0;
config->txtbits = 0;
config->nuwbits = 32;
config->bad_uw_errors = 9;
config->state_machine = "data";
config->amp_est_mode = 1;
config->ftwindowwidth = 80;
config->codename = "H_128_256_5";
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0};
memcpy(config->tx_uw, uw, sizeof(uw));
config->timing_mx_thresh = 0.08f;
config->data_mode = "streaming";
config->amp_scale = 300E3;
config->clip_gain1 = 2.2;
config->clip_gain2 = 0.85;
} else if (strcmp(mode, "datac1") == 0) {
config->ns = 5;
config->np = 38;
config->tcp = 0.006;
config->ts = 0.016;
config->nc = 27;
config->edge_pilots = 0;
config->txtbits = 0;
config->nuwbits = 16;
config->bad_uw_errors = 6;
config->state_machine = "data";
config->amp_est_mode = 1;
config->ftwindowwidth = 80;
config->codename = "H_4096_8192_3d";
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0};
assert(sizeof(uw) == config->nuwbits);
memcpy(config->tx_uw, uw, config->nuwbits);
config->timing_mx_thresh = 0.10f;
config->data_mode = "streaming";
config->amp_scale = 145E3;
config->clip_gain1 = 2.7;
config->clip_gain2 = 0.8;
} else if (strcmp(mode, "datac3") == 0) {
config->ns = 5;
config->np = 29;
config->tcp = 0.006;
config->ts = 0.016;
config->nc = 9;
config->edge_pilots = 0;
config->txtbits = 0;
config->state_machine = "data";
config->ftwindowwidth = 80;
config->timing_mx_thresh = 0.10;
config->codename = "H_1024_2048_4f";
config->amp_est_mode = 1;
config->nuwbits = 40;
config->bad_uw_errors = 10;
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1,
0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0};
assert(sizeof(uw) <= MAX_UW_BITS);
memcpy(config->tx_uw, uw, sizeof(uw));
memcpy(&config->tx_uw[config->nuwbits - sizeof(uw)], uw, sizeof(uw));
config->data_mode = "streaming";
config->amp_scale = 300E3;
config->clip_gain1 = 2.2;
config->clip_gain2 = 0.8;
} else if (strcmp(mode, "datac4") == 0) {
config->ns = 5;
config->np = 47;
config->tcp = 0.006;
config->ts = 0.016;
config->nc = 4;
config->edge_pilots = 0;
config->txtbits = 0;
config->state_machine = "data";
config->ftwindowwidth = 80;
config->timing_mx_thresh = 0.5;
config->codename = "H_1024_2048_4f";
config->amp_est_mode = 1;
config->nuwbits = 32;
config->bad_uw_errors = 12;
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1,
0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0};
assert(sizeof(uw) <= MAX_UW_BITS);
memcpy(config->tx_uw, uw, sizeof(uw));
memcpy(&config->tx_uw[config->nuwbits - sizeof(uw)], uw, sizeof(uw));
config->data_mode = "streaming";
config->amp_scale = 2 * 300E3;
config->clip_gain1 = 1.2;
config->clip_gain2 = 1.0;
config->rx_bpf_en = true;
} else if (strcmp(mode, "datac13") == 0) {
config->ns = 5;
config->np = 18;
config->tcp = 0.006;
config->ts = 0.016;
config->nc = 3;
config->edge_pilots = 0;
config->txtbits = 0;
config->state_machine = "data";
config->ftwindowwidth = 80;
config->timing_mx_thresh = 0.45;
config->codename = "H_256_512_4";
config->amp_est_mode = 1;
config->nuwbits = 48;
config->bad_uw_errors = 18;
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1,
0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0};
assert(sizeof(uw) <= MAX_UW_BITS);
memcpy(config->tx_uw, uw, sizeof(uw));
memcpy(&config->tx_uw[config->nuwbits - sizeof(uw)], uw, sizeof(uw));
config->data_mode = "streaming";
config->amp_scale = 2.5 * 300E3;
config->clip_gain1 = 1.2;
config->clip_gain2 = 1.0;
config->rx_bpf_en = true;
} else if (strcmp(mode, "datac14") == 0) {
config->ns = 5;
config->np = 4;
config->tcp = 0.005;
config->ts = 0.018;
config->nc = 4;
config->edge_pilots = 0;
config->txtbits = 0;
config->state_machine = "data";
config->ftwindowwidth = 80;
config->timing_mx_thresh = 0.45;
config->codename = "HRA_56_56";
config->amp_est_mode = 1;
config->nuwbits = 32;
config->bad_uw_errors = 12;
uint8_t uw[] = {1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1,
0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0};
assert(sizeof(uw) <= MAX_UW_BITS);
memcpy(config->tx_uw, uw, sizeof(uw));
memcpy(&config->tx_uw[config->nuwbits - sizeof(uw)], uw, sizeof(uw));
config->data_mode = "streaming";
config->amp_scale = 2.0 * 300E3;
config->clip_gain1 = 2.0;
config->clip_gain2 = 1.0;
config->rx_bpf_en = true;
} else {
assert(0);
}
config->rs = 1.0f / config->ts;
}
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