[hpsdr] Adding WWV Sync Capability To PowerSDR like KE9NS

[John C. Westmoreland, P.E.]

Hello HPSDR'ers,

In case some of you would like to try this on the older rigs - I have a
'port'/clone here that is a WIP:

https://github.com/jwestmoreland/OpenHPSDR-PowerSDR-Spot-WIP

Even though this isn't an accurate decode - here's a pic of the first
decode attempt of WWVB:

http://www.westmorelandengineering.com/OpenHPSDR/PowerSDR-Spot-WWV-WIP/FIRST-DECODE.jpg

As far as this is working under Thetis - how does the state
of console.WWVReady ever get updated?  Just wondering.

This is still a WIP - I'm sure there are improvements to be made in not
only some of the math but also some tuning techniques -
but at least it's attempting to decode.

Feel free to clone what I've done and take a look.  I have also spoken
briefly to KE9NS over e-mail.

73's,
John
AJ6BC









On Sat, Oct 24, 2020 at 6:00 AM Scott Traurig <scott.traurig at gmail.com>
wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> John,
>
> This feature already exists in Thetis. If you are on Hermes or post-Hermes
> hardware you might consider migrating to Thetis, as it is almost certainly
> the logical successor to PowerSDR mRX for most people. With Thetis now
> supporting both Protocol 1 and Protocol 2, it is very likely that further
> development of PowerSDR mRX will come to an end.
>
> There are some "gotcha's": no support in Thetis for pre-Hermes hardware,
> no support currently for Protocol 1 stitched receivers or IF sample rates
> above 192KHz. Programming time would probably be better spent filling those
> capability gaps.
>
> Read more here: https://apache-labs.com/community/viewtopic.php?f=9&t=3557
>
> 73,
>
> Scott/w-u-2-o
>
> On Sat, Oct 24, 2020 at 3:50 AM John C. Westmoreland, P.E. <
> john at westmorelandengineering.com> wrote:
>
>>
>> Hello All,
>>
>> I was wondering if we can add what KE9NS has done here:
>>
>> https://www.youtube.com/watch?v=p-5wKRw2xdY
>>
>> to PowerSDR.  Looks like he added some Goertzel algorithm routines to help
>> make this happen.
>>
>> His source is here:
>> https://bitbucket.org/ke9ns/powersdr-ke9ns/downloads/
>>
>> Just wondering if anyone has tried to do this.
>>
>> I've been able to get the multipsk clock tool to decode both WWVB and WWV
>> on my HPSDR rig and default antenna which is pretty cool all things
>> considered since I really didn't do much to help make that work other than
>> turning off some RFI generators in the shack.
>>
>> Maybe someone out there has done this - if so, please post a PR
>> (pull-request) to:
>> https://github.com/TAPR/OpenHPSDR-PowerSDR
>>
>> I'll spend some time on this as I can to see if I can add if this hasn't
>> been done by someone already.  It's a matter of merging what KE9NS has done
>> - his page for build instructions is here:
>> https://www.ke9ns.com/flexpage.html#gpl - search for "source code" on
>> that page in case that doesn't land in the right spot.
>>
>> 73's
>> John
>> AJ6BC
>>
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