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Re: [Discuss-gnuradio] Very low packet loss rate for the discontinuous B


From: Martin Braun (CEL)
Subject: Re: [Discuss-gnuradio] Very low packet loss rate for the discontinuous BPSK communications- the analysis and looking for solution
Date: Sun, 17 Mar 2013 01:52:31 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Sat, Mar 16, 2013 at 04:01:40PM -0500, Nathan West wrote:
> On Sat, Mar 16, 2013 at 2:19 PM, Alex Zhang <address@hidden> wrote:
> > Yes, that is what I am thinking. And try to solve this problem for the
> > non-differential bpsk.
> > Can the known preamble can solve this problem? I am investigate this way.
> 
> I think that's what the "access code" in the packet encoder is for.
> But that's actually something I've been looking to use for my
> application, so I'm also interested in someone more experienced
> chiming in with a nay or yay. If you have any luck with access codes
> I'd be interested in hearing it.

The access code will only make sure that packets only come through when
the phase is (coincidentally) correct. You need to correct for phase
ambiguity yourself.

MB

-- 
Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

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Phone: +49 721 608-43790
Fax: +49 721 608-46071
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KIT -- University of the State of Baden-W├╝rttemberg and
National Laboratory of the Helmholtz Association

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