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Automatic FSK polarity selection on TX side

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This is done by simulating two cells with different polarities.
On first message from mobile station, the cell with the correct
polarity is used, the other is disabled.

On RX side the polarity is not selected, since FSK decoder detects
polarity for every frame.
This commit is contained in:
Andreas Eversberg
2016-05-10 19:25:07 +02:00
parent 021c34a899
commit e2a9c2c6a5
9 changed files with 211 additions and 98 deletions
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10
src/cnetz/cnetz.h
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@@ -110,9 +110,13 @@ typedef struct cnetz {
/* all cnetz states */
enum cnetz_state state; /* main state of sender */
/* cell nr selection */
int cell_auto; /* if set, cell_nr is selected automatically */
int cell_nr; /* current cell number to use (sysinfo) */
/* scheduler */
int sched_ts; /* current time slot */
int last_tx_timeslot; /* last timeslot we transmitted, so we can match MS timeslot */
int sched_last_ts[2]; /* last timeslot we transmitted, so we can match MS timeslot */
int sched_r_m; /* Rufblock (0) / Meldeblock (1) */
int sched_switch_mode; /* counts slots until mode is switched */
enum dsp_mode sched_dsp_mode; /* what mode shall be switched to */
@@ -120,7 +124,7 @@ typedef struct cnetz {
/* dsp states */
enum dsp_mode dsp_mode; /* current mode: audio, "Telegramm", .... */
fsk_fm_demod_t fsk_demod; /* demod process */
int16_t fsk_deviation; /* deviation used for digital signal */
int16_t fsk_deviation; /* deviation of FSK signal on sound card */
int16_t fsk_ramp_up[256]; /* samples of upward ramp shape */
int16_t fsk_ramp_down[256]; /* samples of downward ramp shape */
double fsk_noise; /* send static between OgK frames */
@@ -156,7 +160,7 @@ int cnetz_channel_by_short_name(const char *short_name);
const char *chan_type_short_name(enum cnetz_chan_type chan_type);
const char *chan_type_long_name(enum cnetz_chan_type chan_type);
int cnetz_init(void);
int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int auth, int ms_power, int measure_speed, double clock_speed[2], double deviation, double noise, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int loopback);
int cnetz_create(int kanal, enum cnetz_chan_type chan_type, const char *sounddev, int samplerate, int cross_channels, double rx_gain, int auth, int ms_power, int measure_speed, double clock_speed[2], int polarity, double noise, int pre_emphasis, int de_emphasis, const char *write_wave, const char *read_wave, int loopback);
void cnetz_destroy(sender_t *sender);
void cnetz_sync_frame(cnetz_t *cnetz, double sync, int ts);
int cnetz_meldeaufruf(uint8_t futln_nat, uint8_t futln_fuvst, uint16_t futln_rest);