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Prepare for SDR: Add bandwidth and deviation info to sender instance

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This commit is contained in:
Andreas Eversberg
2017-01-06 12:22:51 +01:00
parent 9ff8c3bb25
commit c5cf88ce57
10 changed files with 35 additions and 9 deletions
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5
src/nmt/dsp.c
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@@ -43,6 +43,7 @@
*/
/* signaling */
#define BANDWIDTH 6000.0 /* maximum bandwidth FIXME */
#define COMPANDOR_0DB 32767 /* works quite well */
#define TX_PEAK_FSK 10000.0 /* peak amplitude of signaling FSK +-3.5 KHz @ 1500 Hz */
#define TX_PEAK_SUPER (TX_PEAK_FSK / 3.5 * 0.3 / 2.68) /* peak amplitude of supervisory signal +-0.3 KHz @ 4015 Hz */
@@ -115,6 +116,10 @@ int dsp_init_sender(nmt_t *nmt)
PDEBUG_CHAN(DDSP, DEBUG_DEBUG, "Init DSP for Transceiver.\n");
/* set deviation and modulation parameters */
nmt->sender.bandwidth = BANDWIDTH;
nmt->sender.sample_deviation = 2500.0 / (double)TX_PEAK_FSK; // FIXME: calc real value
PDEBUG(DDSP, DEBUG_DEBUG, "Using FSK level of %.0f (3.5 KHz deviation @ 1500 Hz)\n", TX_PEAK_FSK);
PDEBUG(DDSP, DEBUG_DEBUG, "Using Supervisory level of %.0f (0.3 KHz deviation @ 4015 Hz)\n", TX_PEAK_SUPER);