Hi all,
I have committed a "Makefile.win32" for building wsprd_exp.exe during
testing.
I have now run compartson tests of wsprd.exe and wsprd_exp.exe using a
group of 410 *.wav files, with the following results:
---------------------------------------------------------
Decoder Decodes Time
(s)
---------------------------------------------------------
1. wsprd 2291 524
2. wsprd_exp 2551 418
3. wsprd_exp 2653 434
---------------------------------------------------------
Run #1 used the default wsprd.exe now built along with WSJT-X v1.6.0.
Run #2 uses Steve's wsprd_exp with incoherent (symbol-by-symbol) signal
subtraction; #3 used his fully coherent subtraction routine.
Important note: to make the coherent subtraction work in Windows I had
to increase the stack size -- see LDFALGS in Makefile.win32.
So, with these example files I got 11% more decodes with
symbol-by-symbol subtraction and 16% more decodes with coherent
subtraction.
The two-pass decoder appears to be faster than the single-pass one. (I
don't yet know why, but in a couple of runs this seems to be repeatable.)
I think these results are very impressive! We should certainly make
wsprd_exp (renamed to wsprd) the default WSPR decoder.
-- 73, Joe, K1JT
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