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[Discuss-gnuradio] D-Star (was Re: DV Dongle - AMBE USB Device)
From: |
Dave hartzell |
Subject: |
[Discuss-gnuradio] D-Star (was Re: DV Dongle - AMBE USB Device) |
Date: |
Wed, 19 Mar 2008 21:19:15 -0700 |
Hi All,
I spent some time looking at the D-Star spec, which is supposedly
"open". Unfortunately, the published DOC (yes, singular) out there
are far from complete. Fortunately, Moe, Pieter and Robin did some
work analyzing D-Star and posted their results...
Doing D-Star with the USRP looks easily done and most stuff is there
such as GMSK, inter-leaving, Trellis, etc. I think that what is
missing is a scrambling and of course a framer.
While I'm not sure that D-Star has much advantage over other protocols
available in amateur radio, it seems to be taking off. Networks are
being built. D-Star can transport data, such as short-messages and
most importantly Ethernet frames. AMBE could be replaced by Speex.
Dave
On Tue, Mar 18, 2008 at 10:53 AM, Eric A. Cottrell <address@hidden> wrote:
>
> One of the "problems" with DStar and some other digital voice systems is
> the Patent and other IP considerations. DStar uses the AMBE codec which
> is owned by DVSI.
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