diff options
| author | Andreas Eversberg <jolly@eversberg.eu> | 2017-01-06 12:22:51 +0100 |
|---|---|---|
| committer | Andreas Eversberg <jolly@eversberg.eu> | 2017-02-18 21:00:47 +0100 |
| commit | c5cf88ce575b4fb35628e30b3a5f2e246f060c8d (patch) | |
| tree | 7ec799cd074fa6740a50fa2b4c226570408cd4aa /src/anetz | |
| parent | 9ff8c3bb25422e100801f90c17b9c21118920cfd (diff) | |
Prepare for SDR: Add bandwidth and deviation info to sender instance
Diffstat (limited to 'src/anetz')
| -rw-r--r-- | src/anetz/dsp.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/anetz/dsp.c b/src/anetz/dsp.c index 41888cd..e47f7f2 100644 --- a/src/anetz/dsp.c +++ b/src/anetz/dsp.c @@ -35,12 +35,10 @@ #define PI 3.1415927 /* signaling */ -/* NOTE: The peak deviation is similar for paging tone and signaling tone, - * so both tones should be equal after pre-emphasis. This is why the paging - * tones is so much louder.*/ +#define BANDWIDTH 15000.0 /* maximum bandwidth */ #define TX_PEAK_TONE 8192.0 /* peak amplitude for all tones */ +#warning FIXME: only with emphasis, use seperate option for volume, override by sdr #define TX_PEAK_PAGE 32766.0 /* peak amplitude paging tone */ -// FIXME: what is the allowed deviation of tone? #define CHUNK_DURATION 0.010 /* 10 ms */ // FIXME: how long until we detect a tone? @@ -94,6 +92,10 @@ int dsp_init_sender(anetz_t *anetz, int page_sequence) PDEBUG_CHAN(DDSP, DEBUG_DEBUG, "Init DSP for 'Sender'.\n"); + /* set deviation and modulation parameters */ + anetz->sender.bandwidth = BANDWIDTH; + anetz->sender.sample_deviation = 11000.0 / (double)TX_PEAK_TONE; + anetz->page_sequence = page_sequence; audio_init_loss(&anetz->sender.loss, LOSS_INTERVAL, anetz->sender.loss_volume, LOSS_TIME); |