On Mon, 21 Jul 2008 20:04:45 GMT, Casey Hawthorne
<caseyhHAMMER_TIME@[EMAIL PROTECTED]
> wrote, quoted or indirectly quoted
someone who said :
>Is it possible at air****ts for planes to broadcast their GPS
>information to each other, including their other information, like
>orientation, velocity, acceleration, etc?
A digital system could work much like Ethernet does, the old Aloha
network did/does, or like modern packet cell phone protocols do.
Instead of assigning frequencies long term to users, you broadcast a
short burst over multiple frequencies. Collision detect triggers
retransmit. It might work like multicast.
Modems broadcast on many frequencies at once. They intelligently
tem****arily stop using noisy channels.
In the system you propose, there is just a trickle of data, but you
want to make sure it gets through no matter what the atmosphere is
doing.
Heavy error-correcting codes might play a big role.
--
Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com
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