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