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Re: [Discuss-gnuradio] Half-Duplex Relay
From: |
Martin Braun |
Subject: |
Re: [Discuss-gnuradio] Half-Duplex Relay |
Date: |
Tue, 14 Jan 2014 17:56:03 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
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