79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
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// ----------------------------------------------------------------------------
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//
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// rsid.h
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//
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// Copyright (C) 2008, 2009
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// Dave Freese, W1HKJ
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// Copyright (C) 2009
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// Stelios Bounanos, M0GLD
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//
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// This file is part of fldigi.
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//
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// Fldigi is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Fldigi is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with fldigi. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// Tone separation: 10.766Hz
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// Integer tone separator (x 16): 172
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// Error on 16 tones: 0.25Hz
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// Tone duration: 0.093 sec
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// Tone duration, #samples at 8ksps: 743
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// Error on 15 tones: negligible
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// 1024 samples -> 512 tones
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// 2048 samples, second half zeros
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// each 512 samples new FFT
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// ----------------------------------------------------------------------------
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// This code has been modified to work with QtSOundModem by John Wiseman G8BPQ
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// Main change is to run at 12000 samples/sec and only support QtSM Modes. This
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// makes it incompatble with MultiPSK and fldigi
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// Needed code has been extracted and converted to C
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#ifndef RSID_H
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#define RSID_H
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#include "globals.h"
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//#include "gfft.h"
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//#define RSID_SAMPLE_RATE 11025.0f
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#define RSID_SAMPLE_RATE 12000.0f
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#define RSID_FFT_SAMPLES 512
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#define RSID_FFT_SIZE 1024
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#define RSID_ARRAY_SIZE (RSID_FFT_SIZE * 2)
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#define RSID_BUFFER_SIZE (RSID_ARRAY_SIZE * 2)
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#define RSID_NSYMBOLS 15
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#define RSID_NTIMES (RSID_NSYMBOLS * 2)
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#define RSID_PRECISION 2.7 // detected frequency precision in Hz
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// each rsid symbol has a duration equal to 1024 samples at 11025 Hz smpl rate
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#define RSID_SYMLEN (1024.0 / RSID_SAMPLE_RATE) // 0.09288 // duration of each rsid symbol
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enum {
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RSID_BANDWIDTH_500 = 0,
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RSID_BANDWIDTH_1K,
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RSID_BANDWIDTH_WIDE,
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};
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typedef double rs_fft_type;
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#endif
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