[BC] Amateur radio spectrum

Robert Bowe robertb at gjradio.com
Fri Mar 20 19:20:48 CDT 2009


Isn't it in the nature of spread spectrum technology to have sufficient
redundancy and robust algorithms to survive such a "pollution generator?"

How could a pair of 20kHz FM carriers knock down a properly designed and
implemented technology as you stated:

 >You do it by spreading the spectrum over several GHz.

What level of interference increase in terms of B/W is that??  < 0.01% !

On Fri, Mar 20, 2009 at 3:00 PM, <RichardBJohnson at comcast.net> wrote:

 > No! You are saying things that I NEVER said!
 > I said (exactly); " When you fire up your 2-meter
 > 3-watt push-to-talk to doubly your spectrum pollution
 > using your repeater, you just punched a 1-second
 > hole in the spectrum that could have transferred the entire
 > contents of your PC hard disk (if the disk had been fast enough)."
 >
 > It's that near CW carrier that destroyed the ability of anybody
 > near you to use spread-spectrum communications. I never even mentioned
 > your misquoted, "In that paragraph, you state using a two meter radio,
 > running normal FM modulation, using just under  20 kHz bandwidth,
 > times two channels, repeater in and out, uses the same
 > bandwidth as some scheme that you claim,..." It is sheer
 > unmitigated BS, up with which I shall not put.
 >
 > The word "double" was a type, should have been "double,"
 > because you now have TWO pollution-generators on the air
 > at the same time.




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