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Re: Practical Wireless Data Modem Design book



That's a great reference!  I do not think the legal "profession" will be
after you.  If James Miller can not provide you with schematics, I would
be glad to do so with his permission.  Cliff K7RR

On Wed, 20 Sep 2000, Howard Long wrote:

> All,
> 
> Whilst learning about ways of providing digital satellite comms, I picked up
> the following book last week:
> 
> Practical Wireless Data Modem Design
> Jonathon Y. C. Cheah
> Artech House Publishers 1999
> ISBN 1-58053-047-8
> 
> Although aimed at the serious satellite professional, it mentions in a few
> places how OSCAR satellites have been used for many years by Hams. Indeed,
> one example quote:
> 
> [...LEO networks fashion the satellite communications in line with the
> Amateur Radio's "OSCAR" series of satellites, which supported experimental
> packet data and other analog voice traffic for many years.]
> 
> To quote again (hope I don't get subpoena'd for copyright
> infringringement!):
> 
> [...technology has come around full circle; the most modern and yet to be
> deployed portable satellite communications technology today, known as the
> "little LEO" networks, have their technical origins in the age-old OSCAR
> series of satellites.]
> 
> It then goes on to describe a real OSCAR BPSK 400bps demodulator right down
> to schematics.
> 
> Being a professional text, a lot of the content is not directly applicable
> to our limited budgets, such as a 20Mbps QPSK demodulator using ASICs to
> show how DirecTV style downlinks can be demodulated.
> 
> It's interesting that such a high brow publication credits the OSCAR program
> with such high esteem.
> 
> 73 Howard G6LVB
> 
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