Commit Graph

33 Commits

Author SHA1 Message Date
Kamal Mostafa e9263c9c9d fsk: fix noise <= EPSILON handling
Handle noise <= EPSILON better; fixes (im)perfect test cases on i386.
2012-08-19 15:58:08 -07:00
Kamal Mostafa f81f069d95 minimodem: --limit (2.3) sets fsk_confidence_search_limit
Significant performance enhancements from fsk_confidence_search_limit:
runs far fewer FFT's when --limit (default 2.3) is less than INFINITY.
2012-08-18 21:24:01 -07:00
Kamal Mostafa e1b055cf4f fsk: AVOID_TRANSIENTS noise limiter re-enabled
Algo #5 needs this, just as #3 did.
2012-08-18 19:15:33 -07:00
Kamal Mostafa 076343a9c3 fsk: MIN_MAGNITUDE noise limiter 2012-08-18 19:15:07 -07:00
Kamal Mostafa 725355aa43 fsk: performance: do not bzero fftin 2012-08-18 16:52:07 -07:00
Kamal Mostafa cf9ba20ee0 fsk: confidence algo #5 (SNR)
Computes SNR confidence value, where "signal" is the magnitude of the FSK
driven frequency, and "noise" is the magnitude of the non-driven frequency.

(Also includes unused algo #4 code, which may not compile anymore.)
2012-08-14 22:31:30 -07:00
Kamal Mostafa bca34371e1 fsk: do not consider the stop bit twice 2011-07-08 13:00:50 -07:00
Kamal Mostafa 25e6e41939 fsk: no FSK_MIN_STRENGTH limitation 2011-07-08 09:26:02 -07:00
Kamal Mostafa 845c3e1be6 fsk: CONFIDENCE_ALGO 3 (worst divergence)
CONFIDENCE_ALGO 3 (worst divergence):
 - single worst diverging bit in the frame
 - amplitude normalized
 - drop AVOID_TRANSIENT
2011-07-08 08:03:31 -07:00
Kamal Mostafa cb3e81e576 fsk debug 2011-07-08 07:31:54 -07:00
Kamal Mostafa fd0546d80d fsk expect_bits 2011-07-07 13:31:10 -07:00
Kamal Mostafa 2d1310febf reduce FSK_MIN_STRENGTH to 0.005 2011-06-23 23:05:35 -07:00
Kamal Mostafa 702c0be223 minimodem licenced as GPL3+ 2011-06-22 17:10:50 -07:00
Kamal Mostafa 3a22116159 fsk: new confidence algo 2011-06-22 10:06:19 -07:00
Kamal Mostafa 2b014b50fb fsk_find_frame: search across an entire bit 2011-06-21 22:30:37 -07:00
Kamal Mostafa 243af5da56 fsk: floating point band_width 2011-06-21 20:27:51 -07:00
Kamal Mostafa 9002cf2694 fsk: confidence considers start/stop bits 2011-06-21 12:13:47 -07:00
Kamal Mostafa 775ef649e1 fsk_bits_analyze / fsk_frame_analyze rework
- confidence calc only uses data bits metrics (for good or ill)
2011-06-12 12:42:08 -07:00
Kamal Mostafa e7b16118e4 fsk: respect n_data_bits 2011-06-10 16:19:11 -07:00
Kamal Mostafa 439b606a97 minimodem 0.2.0 2011-06-08 14:00:22 -07:00
Kamal Mostafa 54f8efde20 minimodem: use fsk.h API 2011-06-08 13:21:12 -07:00
Kamal Mostafa 35121ab63c fsk: move advance to top of loop 2011-06-06 21:36:23 -07:00
Kamal Mostafa 0509066f34 fsk cleanup 2011-06-06 21:33:50 -07:00
Kamal Mostafa 336a057233 fsk: carrier autodetect for 300 baud 2011-06-05 12:10:59 -07:00
Kamal Mostafa 2ea1085b45 fsk cleanup 2011-06-05 08:49:06 -07:00
Kamal Mostafa cd6ab7f77d fsk: noconfidence_bits increase to 20
... and probably should be set even higher, to allow for even longer
idle-bit (stop-bit) periods.
2011-06-05 08:44:47 -07:00
Kamal Mostafa 3522182394 fsk new confidence equation 2011-06-04 16:31:26 -07:00
Kamal Mostafa 1e96d42d16 fsk_bit_analyze refactor 2011-06-04 15:55:22 -07:00
Kamal Mostafa 0e888d2bf2 fsk cleanup 2011-06-04 14:41:41 -07:00
Kamal Mostafa 08654e8466 fsk: AVOID_TRANSIENTS allows for miniscule FSK_MIN_CONFIDENCE 2011-06-04 14:15:54 -07:00
Kamal Mostafa 71baa6f916 fsk cleanup 2011-06-04 11:56:26 -07:00
Kamal Mostafa b73f7fb5b8 fsk: cleanup 2011-06-04 09:57:33 -07:00
Kamal Mostafa 80c8a62073 fsk: multibit decoder 2011-06-03 23:26:00 -07:00