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AMPS: Improved level detection of bit decoder

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This commit is contained in:
Andreas Eversberg
2016-10-28 17:09:00 +02:00
parent 3a3c1c258b
commit 052fe5d1de
2 changed files with 72 additions and 45 deletions
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9
src/amps/amps.h
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@@ -87,9 +87,12 @@ typedef struct amps {
/* the ex buffer holds the duration of one bit, and wrapps every
* bit. */
double fsk_rx_bitcount; /* counts the bit. if it reaches or exceeds 1, the bit is complete and the next bit starts */
int16_t *fsk_rx_buffer; /* rx buffer for one bit */
int fsk_rx_buffer_length; /* length of rx buffer */
int fsk_rx_buffer_pos; /* current position in buffer */
int16_t *fsk_rx_window; /* rx buffer for one bit */
int fsk_rx_window_length; /* length of rx buffer */
int fsk_rx_window_half; /* half of length of rx buffer */
int fsk_rx_window_begin; /* where to begin detecting level */
int fsk_rx_window_end; /* where to end detecting level */
int fsk_rx_window_pos; /* current position in buffer */
/* the rx bufffer received one frame until rx length */
char fsk_rx_frame[FSK_MAX_BITS + 1]; /* +1 because 0-termination */
int fsk_rx_frame_length; /* length of expected frame */