95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: tofdm_acq.c
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AUTHORS.....: David Rowe
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DATE CREATED: Mar 2021
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Tests for the acquistion (sync) parts of the C version of the OFDM modem.
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This program outputs a file of Octave vectors that are loaded and
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automatically tested against the Octave version of the modem by the Octave
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script tofdm_acq.m
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\*---------------------------------------------------------------------------*/
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#include <assert.h>
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#include <math.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "codec2_ofdm.h"
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#include "octave.h"
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#include "ofdm_internal.h"
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#define MAX_FRAMES 500
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int main(int argc, char *argv[]) {
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struct OFDM *ofdm;
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struct OFDM_CONFIG ofdm_config;
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ofdm_init_mode("datac0", &ofdm_config);
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ofdm = ofdm_create(&ofdm_config);
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ofdm->data_mode = "burst";
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ofdm->verbose = 2;
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ofdm->timing_mx_thresh = 0.15;
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ofdm->postambledetectoren = 1;
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assert(ofdm != NULL);
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int nin = ofdm_get_nin(ofdm);
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int rxbufst = ofdm->rxbufst;
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FILE *fin = fopen(argv[1], "rb");
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assert(fin != NULL);
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short rx_scaled[ofdm_get_max_samples_per_frame(ofdm)];
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int f = 0;
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float timing_mx_log[MAX_FRAMES];
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int ct_est_log[MAX_FRAMES];
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float foff_est_log[MAX_FRAMES];
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int timing_valid_log[MAX_FRAMES];
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int nin_log[MAX_FRAMES];
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while (fread(rx_scaled, sizeof(short), nin, fin) == nin) {
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fprintf(stderr, "%3d ", f);
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ofdm_sync_search_shorts(ofdm, rx_scaled, ofdm->amp_scale / 2.0f);
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if (f < MAX_FRAMES) {
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timing_mx_log[f] = ofdm->timing_mx;
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ct_est_log[f] = ofdm->ct_est;
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foff_est_log[f] = ofdm->foff_est_hz;
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timing_valid_log[f] = ofdm->timing_valid;
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nin_log[f] = ofdm->nin;
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}
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f++;
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// reset these to defaults, as they get modified when timing_valid asserted
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ofdm->nin = nin;
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ofdm->rxbufst = rxbufst;
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}
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fclose(fin);
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/*---------------------------------------------------------*\
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Dump logs to Octave file for evaluation
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by tofdm_acq.m Octave script
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\*---------------------------------------------------------*/
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FILE *fout = fopen("tofdm_acq_out.txt", "wt");
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assert(fout != NULL);
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fprintf(fout, "# Created by tofdm_acq.c\n");
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octave_save_complex(fout, "tx_preamble_c", (COMP *)ofdm->tx_preamble, 1,
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ofdm->samplesperframe, ofdm->samplesperframe);
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octave_save_complex(fout, "tx_postamble_c", (COMP *)ofdm->tx_postamble, 1,
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ofdm->samplesperframe, ofdm->samplesperframe);
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octave_save_float(fout, "timing_mx_log_c", timing_mx_log, 1, f, f);
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octave_save_float(fout, "foff_est_log_c", foff_est_log, 1, f, f);
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octave_save_int(fout, "ct_est_log_c", ct_est_log, 1, f);
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octave_save_int(fout, "timing_valid_log_c", timing_valid_log, 1, f);
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octave_save_int(fout, "nin_log_c", nin_log, 1, f);
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fclose(fout);
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ofdm_destroy(ofdm);
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return 0;
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}
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