Re: [Discuss-gnuradio] Half-Duplex Relay

[Martin Braun]

On Tue, Jan 14, 2014 at 11:29:51AM +0000, David Halls wrote:
> Thanks Martin,
> 
> Yes, I am using USRP N210. I aim to have separate code on S, R and D as you 
> suggest. I have built a 2 x 1 MISO system developing from your OFDM GRC code 
> - thanks :)
> 
> I have added a number of new elements including 802.16e randomiser, random 
> vector source, SNR estimate, BER estimate and orthogonal headers... anyway I 
> digress.
> 
> I am already using some tagging. I hope I can use the rx_time timestamp and 
> number of samples received to work out the time I want to begin and end 
> transmission at the relay. This, as Marcus comments, will be much more 
> complicated as the network topology grows. Currently I will assume just two 
> time slots and allow a generous amount of time for propagataion and 
> decoding/reencoding delay.
> 
> I will then try to use 'set_command_time' to control when the relay txs.
> 
> Do you feel this makes sense? I will let you know how I progress.

Sounds good. Tell us how you're coming along, and do ask for advice
if necessary.

MB