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[Discuss-gnuradio] Re: D-Star with gnuradio?
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From: |
Patrick Strasser |
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Subject: |
[Discuss-gnuradio] Re: D-Star with gnuradio? |
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Date: |
Sun, 09 Jan 2011 03:17:12 +0100 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050602 Thunderbird/1.0.2 Mnenhy/0.7.2.0 |
schrieb Rafael Diniz on 2011-01-08 03:30:
> Hi people,
> Have anyone successfully built a D-Star transmitter with gnuradio blocks?
For the protocol part, see the archives[1]. IMO D-Star is a thing to
make money rather than a system to foster independent communication.
There are legal, privacy and free implementation issues.
For the codec parth D-Star uses AMBE+ as codec, which is non-free. You
can buy codec ICs, but you cannot implement it in Open Source. See the
archives again for a discussion.
Have a look at "codec2" [2], this should work fine for quite the same
requirements: low NF bandwidth, low bitrate, low latency.
Regards Patrick
[1]
http://search.gmane.org/?query=%22d-star%22&author=&group=gmane.comp.gnu.radio.general&sort=relevance&DEFAULTOP=and&xP=d%09star&xFILTERS=Gcomp.gnu.radio.general---A
[2] http://www.rowetel.com/blog/codec2.html
[3] http://codec2.org/