61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: tfsk_llr.c
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AUTHOR......: David Rowe
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DATE CREATED: July 2020
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Simple test program for 4FSK LLR routines.
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\*---------------------------------------------------------------------------*/
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#include <math.h>
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#include <stdio.h>
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#include "mpdecode_core.h"
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#define M 4
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#define BPS 2
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#define NSYM 5
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#define V_EST 2
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#define SNR_EST 10
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/* Generated test vectors with:
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octave:100> init_cml('~/cml/');
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octave:101> rx_filt=[1 0 0 0; 0 1 0 0; 0 0 1 0; 0 0 0 1]
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octave:102> symL = DemodFSK(rx_filt,10,1); -Somap(symL)
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*/
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/* one col per symbol:
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0 1 2 3 4 */
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float rx_filt[] = {
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1.0, 0.0, 0.0, 0.0, 1.0, /* filter 0 */
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0.0, 1.0, 0.0, 0.0, 0.0, /* filter 1 */
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0.0, 0.0, 1.0, 0.0, 0.0, /* filter 2 */
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0.0, 0.0, 0.0, 1.0, 0.0 /* filter 3 */
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};
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float llrs_target[] = {7.3252, 7.3252, /* bit 0, 1 */
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7.3252, -7.3252, /* 2, 3, ... */
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-7.3252, 7.3252, -7.3252, -7.3252, 7.3252, 7.3252};
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int main(void) {
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float llrs[BPS * NSYM] = {0};
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fsk_rx_filt_to_llrs(llrs, rx_filt, V_EST, SNR_EST, M, NSYM);
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float error = 0.0;
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for (int i = 0; i < NSYM * BPS; i++) {
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fprintf(stderr, "% f\n", llrs[i]);
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error += pow(llrs[i] - llrs_target[i], 2.0);
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}
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if (error < 1E-3) {
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fprintf(stderr, "PASS\n");
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return 0;
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} else {
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fprintf(stderr, "FAIL\n");
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return 1;
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}
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}
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