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/*---------------------------------------------------------------------------*\
FILE........: tqam16.c
AUTHOR......: David Rowe
DATE CREATED: August 2020
Simple sanity check for QAM16 symbol mapping.
\*---------------------------------------------------------------------------*/
#include <stdio.h>
#include <string.h>
#include "ofdm_internal.h"
int main(void) {
int c;
for (c = 0; c < 16; c++) {
int tx_bits[4], rx_bits[4];
for (int i = 0; i < 4; i++) tx_bits[i] = (c >> (3 - i)) & 0x1;
complex float symbol = qam16_mod(tx_bits);
qam16_demod(symbol, rx_bits);
if (memcmp(tx_bits, rx_bits, 4)) {
fprintf(stderr, "FAIL on %d!\ntx_bits: ", c);
for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", tx_bits[i]);
fprintf(stderr, "%f %f\nrx_bits: ", creal(symbol), cimag(symbol));
for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", rx_bits[i]);
fprintf(stderr, "%f %f\n", creal(symbol), cimag(symbol));
return 1;
}
}
fprintf(stderr, "%d tested OK...\nPASS!\n", c);
return 0;
}
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