[time-nuts] Phase modulation detection/NIST plan

[paul]

Peter indeed there could be
But it should not need to be decoded to undo the psk.
Plus documentation lacks some of the details I think to actually do it.
But that would be a significant project since the formats not been 
settled completely yet.
Regards
Paul.


On 7/8/2012 6:40 PM, Peter Gottlieb wrote:
> Any possibility of using the decoded signal to un-do the modulation 
> and feed the reconstituted signal to the older receiver?
>
>
>
> On 7/8/2012 12:56 PM, paul wrote:
>> Ei
>> Sorry if I have your name reversed. By taking this approach it 
>> eliminates the ability to use wwvb as a frequency reference because 
>> it destroys that traceability.
>> Thats what we are trying to preserve. Or at least re-establish for 
>> the older phase measuring receivers.
>> Regards
>> Paul
>>
>> On 7/8/2012 12:10 PM, Tofurk Ei wrote:
>>> If the changeover you are talking about is this one:
>>> http://www.nist.gov/pml/newsletter/radio.cfm as a proof of concept a 
>>> DVB-T
>>> dongle/upconverter combo could almost certainly handle PM easily to 
>>> output
>>> whatever it encodes, when paired with gnuradio..
>>>
>>>   The RTL2832U chip might also be able to handle some low band signals
>>> directly, using direct sampling. No upconverter.
>>>
>>> Regardless, then the data would be fed into gnuradio - the gnuradio
>>> developers GUI is called "gnuradio companion" It has a nifty way of 
>>> doing
>>> this kind of thing, one builds a "flow graph" where the actual 
>>> demodulation
>>> is simply laid out graphically and tested.
>>>
>>> When everything works to one's satisfaction the file is saved and it 
>>> gets
>>> compiled - then it can run - its basically a python script.
>>>
>>> If the modulation scheme is public, I think you can be almost 
>>> certain that
>>> gnuradio might be quite useful to rapidly design a tool to 
>>> demodulate it.
>>> Perhaps very quickly.
>>>
>>> For the money, one really couldn't hope to beat the flexibility of this
>>> combination in any other manner. If I were interested in trying this I
>>> would join the gnuradio mailing list and ask there. Perhaps the 
>>> answer is
>>> surprisingly simple.
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to 
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to 
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.