mirror of https://github.com/drowe67/codec2.git
36 lines
1.0 KiB
C
36 lines
1.0 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: tqam16.c
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AUTHOR......: David Rowe
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DATE CREATED: August 2020
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Simple sanity check for QAM16 symbol mapping.
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\*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include <string.h>
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#include "ofdm_internal.h"
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int main(void) {
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int c;
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for (c = 0; c < 16; c++) {
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int tx_bits[4], rx_bits[4];
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for (int i = 0; i < 4; i++) tx_bits[i] = (c >> (3 - i)) & 0x1;
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complex float symbol = qam16_mod(tx_bits);
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qam16_demod(symbol, rx_bits);
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if (memcmp(tx_bits, rx_bits, 4)) {
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fprintf(stderr, "FAIL on %d!\ntx_bits: ", c);
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for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", tx_bits[i]);
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fprintf(stderr, "%f %f\nrx_bits: ", creal(symbol), cimag(symbol));
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for (int i = 0; i < 4; i++) fprintf(stderr, "%d ", rx_bits[i]);
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fprintf(stderr, "%f %f\n", creal(symbol), cimag(symbol));
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return 1;
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}
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}
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fprintf(stderr, "%d tested OK...\nPASS!\n", c);
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return 0;
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}
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