Re: [Discuss-gnuradio] Time syncing between SDRs on different computers

[Markus Heller]

In case of a multilateration attempt, please consider this presentation:

https://www.youtube.com/watch?v=Km4TU17b05s

vy73
markus
dl8rds

Am Donnerstag, den 17.08.2017, 01:52 +1000 schrieb
address@hidden:
> Are you trying to do MultiLateration using software defined radio ?
> 
> 
> -----Original Message-----
> From: Sylvain Munaut [mailto:address@hidden 
> Sent: Thursday, 17 August 2017 1:20 AM
> To: address@hidden
> Cc: address@hidden; GNURadio Discussion List <address@hidden>
> Subject: Re: [Discuss-gnuradio] Time syncing between SDRs on different 
> computers
> 
> On Wed, Aug 16, 2017 at 5:11 PM,  <address@hidden> wrote:
> > What type of hardware? I thought from hardware point of view only 
> > precise clock is required and all the other things in firmware. I've 
> > naively thought i could modify hackrf firmware to get this feature.
> 
> Mostly a FPGA and a PPS input from a GPS receiver.
> 
> Each individual sample has a timestamp of when it has been received.
> And you can also reset the timestamp on the next  PPS edge.
> 
> Technically it would be possible to modify the hackrf firmware and repurpose 
> some GPIOs and have all samples transmitted to the host be in timestamped 
> packets and implements timestamping in the on-board ARM.
> For additional hardware you'd only need an external GPS receiver (or some 
> other way to have both a single freq reference + single sync pulse).
> 
> Cheers,
> 
>     Sylvain
> 
> 
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