RE: [Discuss-gnuradio] bug in benchmark_tx/rx/loopback ?

[Joreen Tan]

Hi,
 
I have noticed it as well. If not the last packet, then the whole list of packets received will be wrong. As in, even when using the same set up, and the same configuration, the experiment will work this time but maybe not the other time. I'm quite puzzled about this too. Could it be the antenna problem?
 
And also, as i am very unfamiliar with gnuradio, but am asked by my supervisor, whether there is a way of acknowledging the end of transmission by the receiver to the transmitter? Like for example, to send a straight 0s back to the transmitter?

Regards,
Joreen




> Date: Mon, 8 Dec 2008 23:22:03 -0500
> From: address@hidden
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] bug in benchmark_tx/rx/loopback ?
> CC: address@hidden
>
>
>
> Achilleas Anastasopoulos wrote:
> >
> > I have noticed that in benchmark_tx/rx (as well as in
> > benchmark_loopback), there is always
> > one packet lost in the transmission (always the last).
> > It is either not transmitted at all (getting out of the USRP)
> > or is not received. This behavior is persistent regardless of packet
> > size/data-rate/modulation format.
> >
> > Has anyone looked into this before?
> >
>
> I *think* it may be due to the amount of data needed by some of the
> processing blocks to decode the whole packet. I would be that it
> detects the preamble, but does not completely decode the packet because
> it needs a couple more samples to decode the last bit or two. Maybe
> check if it at least detects the preamble.
>
> - George
>
>
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