[Laser] Troposcatter and Information Theory-2

[riese-k3djc at juno.com]

Andy


I am not sure if you are aware of some of the existing QRSS programs or
not
these will go down to the milHz range and at 120 second dot length are
able
to go 30 Db under the noise to see the signal. The people that developed
the 
programs may be able to help with your questions.. These programs are
used to 
work on LF at 135 Khz as well as the band 160 to 190 Khz where part 15
operators
can run 1 watt to a 50 ft antenna, with these limitations beacons have
been copied
over a 1000 miles,, thats a really low ERP.

suggest checking the Long Wave Club of America at    
http://www.lwca.org/
you will find links to the software 

Using ARGO I have been able to copy the sub carrier of the ramsie Tx from
a double wall bounce
HAR ,,,,the Tx was in a different room and the dot was placed on a wall
reflected several times
before entering the shack and the K3GPG detector which directly fed my LF
converter, the soundcard
was fed by the IF rcv

HAve Fun

Bob  K3DJC


On Fri, 25 Jun 2004 01:44:55 -0400 "Andrew T. Flowers, K0SM"
<aflowers at frontiernet.net> writes:
> Time to get out the envelope.....
> 
> I'll start by going down the garden path...I naively asked myself, 
> "Okay, if I send the data in durations but loop repeat them 82 
> times, I 
> end up with the same amount of information.  But what prevents me 
> from 
> sending the data 83 times in that minute, or 1000 times, thus 
> improving 
> throughput?"  That would make life wonderful and we wouldn't have a 
> need 
> for information technology classes  if that were the case :-) , but 
http://mailman.qth.net/mailman/listinfo/laser
> 
>