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4G and GPS interference



 
 
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  #1  
Old February 23rd 11, 09:47 PM posted to rec.aviation.soaring
Frank Whiteley
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Posts: 2,099
Default 4G and GPS interference

http://www.physorg.com/news/2011-02-...-gps-dead.html
  #2  
Old February 23rd 11, 10:56 PM posted to rec.aviation.soaring
Jim Logajan
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Posts: 1,958
Default 4G and GPS interference

Frank Whiteley wrote:
http://www.physorg.com/news/2011-02-...-gps-dead.html


Since they used a signal generator to simulate the LightSquared
transmissions, and could therefore insure the signal stayed within the
allocated frequency band, it would appear that the fault is likely in the
GPS receivers.

However, this and other articles seem to claim the LightSquared
transmissions are "interference" - implying that they emit unacceptable
signals outside their allocated frequencies. I'm not sure it would be fair
to characterize their emissions as "interference" if in fact the GPS
receivers are "listening" too sensitively to frequencies outside their
working bands.

In the end I expect LightSquared is going to be forced to change their
operating plans because of the installed base of GPS receivers,
irrespective of the quality (or lack thereof) of the GPS receivers or
LightSquared equipment.
  #3  
Old February 23rd 11, 10:59 PM posted to rec.aviation.soaring
ray conlon
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Posts: 60
Default 4G and GPS interference

On Feb 23, 3:47*pm, Frank Whiteley wrote:
http://www.physorg.com/news/2011-02-...-gps-dead.html


Add this to solar flares,problems with CATV amplifiers,UHF trnasmitter
harmonics, etc. etc., and you beging to understand why VOR,ILS and
ground based radar and transponders will be around for a long
time...not to mention the FAA underestimated the cost of the GPS
equipment/system by a factor of about 10X original projected cost.
  #4  
Old February 24th 11, 05:41 PM posted to rec.aviation.soaring
Martin Gregorie[_5_]
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Posts: 1,224
Default 4G and GPS interference

On Wed, 23 Feb 2011 12:47:49 -0800, Frank Whiteley wrote:

http://www.physorg.com/news/2011-02-...-gps-dead.html


Here's a link to the original test report:

http://www.gpsworld.com/gnss-system/.../lightsquared-
jamming-report-11030


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |
  #5  
Old February 25th 11, 03:47 PM posted to rec.aviation.soaring
Kolie
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Posts: 5
Default 4G and GPS interference

The way money affects politics is a lot easier to predict than the
effect of adjacent radio frequencies on each other:

http://www.washingtontimes.com/news/...rica-get-lost/
 




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