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Re: [Discuss-gnuradio] Tag preemption USRP sink

From: Martin Braun
Subject: Re: [Discuss-gnuradio] Tag preemption USRP sink
Date: Tue, 15 Dec 2015 10:27:05 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0

tP indicates you're using corrupt tagged streams, maybe your add block
is overlaying them? I'm also not entirely sure what you mean by
'simultaneous parallel transmissions'. Are they on different
frequencies? Are you mixing them together in baseband?


On 15.12.2015 04:10, Saulo Queiroz wrote:
> Hi all,
> I'm trying to Tx a same tagged stream simultaneously through two analog
> orthogonal channels.
> The flow path of each stream copy is: resampling, adjust tag lenght and
> xlating FFT filter (with shifting). After this I take the output of each
> filter and put into and add block then to the USRP sink. I also do the
> reverse process at the Rx side.
> With some packets are successfuly receive but with so many losses. At
> the Tx side I get many "tP". Any tip on how to set simultaneous parallel
> transmissions without this?
> I'm using gr-ieee80211 (thanks Bastian and team :) that has worked
> nicely with the single channel scenario.
> thanks in advance
> BR
> -- 
> Saulo Jorge bq
> - "Beware of bugs in the above code; I have only proved it correct, not
> tried it." 
> Donald Knuth.
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> Discuss-gnuradio mailing list
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