Commit Graph

11 Commits

Author SHA1 Message Date
Steven Franke
5ca81a6507
Use 3rd order polynomial fit to estimate the noise baseline. The
polynomial fit is done over 400 Hz bandwidth for T/R periods longer
than 15s, and over approx. 600 Hz (10 times the signal bandwidth) for
T/R period of 15s.
2020-08-29 19:55:23 +01:00
Steven Franke
d82b9f5b0e
Speed up decoder by eliminating some complex multiples in sequence detection loop. Add timer calls for doppler spread calculation and sequence detection loop. 2020-08-29 19:55:22 +01:00
Steven Franke
b9328b96c9
Tweaks to update the diagnostics that are written to fort.21. 2020-08-29 19:55:22 +01:00
Steven Franke
e02850ae5a
Streamline fst4_decode. Add timer for downsampling. 2020-08-29 19:55:22 +01:00
Steven Franke
782c779392
Reconfigure to optimize decoder for MF/LF (high coherence) channels. 2020-08-29 19:55:21 +01:00
Steven Franke
bf06193c10
Add timer call for bit metric calculation. Improve some comments. Make fort.21 ntype parameter more informative. 2020-08-29 19:54:38 +01:00
Steven Franke
9d2bde7180
Fix SNR calculation for B,C,D submodes. 2020-08-29 19:49:46 +01:00
Steven Franke
cdbe425e56
Use squared metric for fst4 - works better on fading channel. 2020-08-29 19:49:23 +01:00
Steven Franke
5eec869b2c Remove an unused file. 2020-07-23 13:22:12 -05:00
Bill Somerville
a7223a5efa
A few more cosmetic 240 -> 4 changes 2020-07-23 19:13:05 +01:00
Steven Franke
085e63e05d Rename fst240 to fst4 in Fortran routines. 2020-07-23 12:48:50 -05:00