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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,"2020C") == 0) {
config->ts = 0.014; config->tcp = 0.004; config->nc = 29; config->ns=5; config->codename = "H_212_158";
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 {
assert(0);
}
config->rs=1.0f/config->ts;
}
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