Hi Steve,
Yes, got it -- many thanks. I haven't done anything with it, yet, but
may find some time to work on it over the weekend.
-- Joe
On 10/16/2015 9:18 PM, Steven Franke wrote:
> Joe -
>
> I hope that you have received the zip file containing the versions of the key
> routines that produced the results that I reported yesterday. I sent it to
> your Princeton email because the attached zip file caused the list to bounce
> the message.
>
> For the record, just now I found that lowering the nsoft+nhard threshold to
> 79 (i.e. (nsoft+nhard)<79) gives me 853 good decodes and 0 bad decodes on
> s3_1000.bin using ntrials=10000 and my version of rsdtest.
>
> Steve k9an
>
>> On Oct 16, 2015, at 3:33 PM, Joe Taylor<[email protected]> wrote:
>>
>> Hi Steve,
>>
>> Sorry to say, my progress has been slow today. I wanted to start by
>> reproducing your good-looking results using rsdtest. So far I have not
>> really managed to do so; I can get as many good decodes as you reported,
>> but not (yet?) with the sfrsd2.c attached to your email.
>>
>> Could you please give me details on exactly how you built rsdtest? In
>> what directory, in our SVN tree? With what Makefile?
>>
>> -- Joe
>>
>>
>> On 10/15/2015 10:03 PM, Steven Franke wrote:
>>> Joe,
>>> Reporting on results of this evening’s tests on -24db gaussian noise
>>> no-fading (gnnf) data. As always in these tests, the number of test files
>>> is 1000.
>>>
>>> I started with sfrsd2 from the current r5970 and opened up the acceptance
>>> criterion to nhard+nsoft<81. The purpose of doing this is to find out how
>>> many potentially good decodes are in the set of candidates that are
>>> presented to the decoder.
>>>
>>> I ran this sfrsd2 in rsdtest using matched sf metrics and sf gnnf erasure
>>> probabilities. I used your s3_1000.bin file.
>>>
>>> ntrials ngood
>>> 0 5
>>> 1 26
>>> 10 206
>>> 100 511
>>> 1000 736
>>> 10000 854 + 3bad
>>>
>>> I’d call this very good performance.
>>>
>>> Next, I dropped the sfrsd2.c that was used with rsdtest back into the
>>> current wsjt-x, which I set up to use 10000 trials. I zero’d the ntest
>>> threshold. Using the sf metrics and using my batch of -24db files, I get
>>> only 735 decodes - about the same as I was getting with ntrials=1000 in
>>> rsdtest.
>>>
>>> So this seems to support my notion that something may not be completely
>>> right with the syncing or final peakup of dt and f0, or some other thing
>>> upstream from demod64a in this latest version. Maybe the next step should
>>> be for me to drop the same sfrsd2.c into whatever version you used to
>>> generate the s3_1000.bin file. Do you remember what version that was?
>>>
>>> Steve k9an
>>>
>>>> On Oct 15, 2015, at 6:32 PM, Steven Franke<[email protected]> wrote:
>>>>
>>>> Joe,
>>>>
>>>>> I conclude that for these files the candidate selection is OK
>>>>> (preferably with a somewhat higher threshold for ntest), but sfrsd is
>>>>> not decoding as many as it "should". I suspect that for marginal
>>>>> signals either different metrics or different values in the probability
>>>>> matrix will yield better results.
>>>>
>>>> Hmm.
>>>>
>>>> I was totally focused on hf performance and the differences between the
>>>> number of BM only decodes between the old and new sync schemes. I see now
>>>> that I have broken something for the -24dB gaussian-noise no-fading case…
>>>> I’ll investigate.
>>>>
>>>> Steve k9an
>>>>
>>>
>>>
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