Don’t worry about it Joe - I tried scaling up my metrics by a factor of 4 and 
then kvasd gave me 644 decodes. So it’s clear that kvasd wants bigger numbers. 
For now, I’ll just focus on trying optimize sfrsd…

Your rsdtest looks like a good way to do quick runs to test sfrsd. At your 
leisure, can you point me to the s3_1000.bin file?

I’m playing with “R” to do statistics on metrics. So far, it looks like the 
rank of p1 (index of p1 in a sorted list) and the ratio p2/p1 are the most 
powerful statistics for identifying symbols that are likely to be in error - at 
least for the SFM.

Do you remember how you came up with the JTM? It looks like you use exp(x) to 
expand the distribution of the power associated with each symbol, and then 
normalize to the total exponentially-expanded power. Was this chosen 
empirically? Or based on a certain model for a fading channel?

Steve k9an

> On Sep 26, 2015, at 8:11 AM, Joe Taylor <j...@princeton.edu> wrote:
> 
> Steve --
> 
> That one always did look a bit odd.  Quite possibly I made a mistake, 
> trying to do too many things at once.
> 
> I will investigate further... but it may be not until Monday.
> 
>       -- Joe
> 
> On 9/25/2015 11:34 PM, Steven Franke wrote:
>> Hi Joe -
>> 
>>> 17.WSJT + kvasd (SFM no ntest)          897
>> 
>> I can’t reproduce this test. Whenever I try to run kvasd using my metrics, I 
>> get no decodes. I have tried this using WSJT10 and WSJT-X. I have commented 
>> out the ntest/nlow check and also the birdie test. At these low SNR’s, my 
>> metrics will all be small - under 100. Did you have to scale up my metrics 
>> to get it to work?
>> 
>> Steve k9an
>> 
>> 
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