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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/bnetz/dsp.c
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@@ -35,6 +35,7 @@
#define PI 3.1415927
/* signaling */
#define BANDWIDTH 5000.0 /* maximum bandwidth */
#define TX_PEAK_TONE 5000.0 /* peak amplitude for all tones */
#define BIT_DURATION 0.010 /* bit length: 10 ms */
#define FILTER_STEP 0.001 /* step every 1 ms */
@@ -85,6 +86,10 @@ int dsp_init_sender(bnetz_t *bnetz)
PDEBUG_CHAN(DDSP, DEBUG_DEBUG, "Init DSP for 'Sender'.\n");
/* set deviation and modulation parameters */
bnetz->sender.bandwidth = BANDWIDTH;
bnetz->sender.sample_deviation = 1250.0 / (double)TX_PEAK_TONE; // FIXME: calc real value
audio_init_loss(&bnetz->sender.loss, LOSS_INTERVAL, bnetz->sender.loss_volume, LOSS_TIME);
bnetz->samples_per_bit = bnetz->sender.samplerate * BIT_DURATION;