Hi Ben,
Thanks for explanations,
I've been doing some theoretical calculations on the group delay estimation
and found that this part is giving negligible latency compared to the
Ethernet portion between USRP and host.
cheers.
2013/5/3 Naceur Amine El Ouni <naceuram...@gmail.com>
> Thank you Marc,
>
> * Ok I will try using a common clock ref and input PPS
>
> * Scheduling the transmit and receive to within one tick of the 100 MHz
> ADC clock: Can that be done into the host GNU radio code or am supposed to
> move the code to the FPGA.
>
> * Is that the samples count method to get accurate time-stamping ?
>
> * Can you please explain to me more about the concept of cross correlating
> transmitted
> and received samples.
>
>
>
> 2013/5/3 mepard [via GnuRadio] <ml-node+s4n41143...@n7.nabble.com>
>
> Hint 1: If both 210s are on the same PPS and frequency reference and the
>> FPGA clocks are synchronized to the PPS, you can schedule the transmit and
>> receive to within one tick of the 100 MHz ADC clock.
>> Hint 2: Cross correlate the transmitted and received samples. The lag
>> will be independent of Ethernet and IP delays.
>>
>> -Marc
>>
>>
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> --
> Naceur Amine El Ouni, B. Ing
> Laboratoire LaCIME.<http://www.etsmtl.ca/Unites-de-recherche/LACIME/Accueil>
>
>
> École de technologie supérieure <http://www.etsmtl.ca/>
>
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>
> 1100, rue Notre-Dame Ouest Montréal (Québec) H3C 1K3 Canada
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--
Naceur Amine El Ouni, B. Ing
Laboratoire LaCIME.<http://www.etsmtl.ca/Unites-de-recherche/LACIME/Accueil>
École de technologie supérieure <http://www.etsmtl.ca/>
naceur.el-o...@lacime.etsmtl.ca
1100, rue Notre-Dame Ouest Montréal (Québec) H3C 1K3 Canada
Tel : 514 396-8800, ext. 7608
Cell : 438-868-2240
--
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