FCC pulls approval due to GPS interference. Any thoughts on this issue?

Discussion in 'The Tiki Bar' started by MonacoMike, Feb 19, 2012.

  1. MonacoMike

    MonacoMike Active Member SILVER Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    97 270DA 5k Kohler A/C,
    85 Monaco 197
    7.4 300hp BII,
    260hp Alpha 1
  2. jason78

    jason78 Active Member TECHNICAL Contributor SILVER Sponsor

    Sep 3, 2008
    Fort Mill, SC / Lake Wylie
    1997 20 Outrage
    200 Merc Offshore
    This sounds like something a several hundred million dollar government study could clear up.
     
  3. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    I've got an interest (very small) in several LPTV stations. The after the last round of frequency auctions the FCC had, there have been interference problems in several different frequency bands. A pure guess is that this is another example if bureaucrats making decisions without understanding what they are regulating and the problem with LightSquared is more one of frequency overlap than a lack of shielding.
     
  4. Westie

    Westie Active Member

    Oct 16, 2008
    Calgary
    2001 260 Sundancer towed with the power of an IFORCE V8
    7.4 L Bravo III
    The problem is light squared got a license for a band that was to be used for satellite communications and via a legal game tried to implement a terrestrial based cell system. So it would have ended up with a terrestrial signal about 120 db higher than the satellite signal in a band that was very close to GPS signals. After many attempts to persuade the FCC that if would be OK the FCC has done the right thing and basically shut down light squared.
    Not many GPS systems, even very high accuarcy ones would have been able to work if light squared had gone ahead.
     
    Last edited: Feb 19, 2012
  5. Pack66Dad

    Pack66Dad New Member SILVER Sponsor

    Aug 26, 2010
    Browns Point, Washington
    1997 41 Convertible
    Caterpillar 3126 Diesels
    Exactly, Boat US and several other boating advocacy groups were fighting this because it would ruin the GPS signal for almost all pleasure craft.

    Regulation once again saves the ignorant..... go figure... LOL
     
  6. Bt Doctur

    Bt Doctur Active Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    Not to mention aircraft, military, satelittes, guided missels, DOD equipment,
     
  7. comsnark

    comsnark New Member

    Apr 10, 2007
    NJ Shore
    SeaRay SunSport
    5.7LX
    What this says to me is that the next serious war will be ugly for the home front, even if combat is 1000 miles away. How many of our toys (both personal and military) are GPS based? GPS in you phone. In your car. In the plane you fly.

    Hopefully, the military stuff is protected against the inevitable jamming of GPS signals.
     
  8. MonacoMike

    MonacoMike Active Member SILVER Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    97 270DA 5k Kohler A/C,
    85 Monaco 197
    7.4 300hp BII,
    260hp Alpha 1
    I do not know anything about this issue, however I am trying to reconcile reports and get to the truth. It seems to boil down to the "frequency overlap" Frank described and-or the GPS manufacturers that did not shield their products: "...the FCC had previously mandated that GPS manufacturers install filters in their equipment to ensure that their signals did not pick up signals from adjacent spectrum and cause interference. Carlisle said during the conference call with reporters that many in the GPS community ignored this mandate, causing the many issues that exist today." Did it happen this way?

    MM
     
  9. MonacoMike

    MonacoMike Active Member SILVER Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    97 270DA 5k Kohler A/C,
    85 Monaco 197
    7.4 300hp BII,
    260hp Alpha 1
    Are jamming signals anything new?

    MM
     
  10. Bt Doctur

    Bt Doctur Active Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    The FCC will indefinitely suspend LightSquared's authority to carry terrestrial broadband signals on frequencies close to GPS frequencies after receiving a report that concludes the two systems cannot currently coexist. The National Telecommunications and Information Administration (NTIA) wrote (PDF) the FCC on Tuesday saying there was no immediate solution to interference problems found in testing GPS units in the presence of the types of signals that LightSquared is proposing. The FCC conditionally allowed LightSquared to use frequency bands it owned adjacent to the GPS bands provided it could prove the broadband wouldn't step on GPS. A year of testing demonstrated serious and widespread interference according to NTIA. LightSquared says it "profoundly disagrees" with those findings and was fighting to have the FCC rule in its favor right up until the decision was announced. The battle isn't officially over yet.

    According to PC World, the FCC was planning to issue a public notice of its intentions on Wednesday and will seek public comment on its plan and the NTIA's conclusions. The NTIA did leave a crack in the door by saying it would like to work with the FCC and industry to tackle the interference problems so that spectrum can be freed up to be used for broadband. LightSquared hasn't said what it intends to do with the decision which will effectively cancel its plans for a $14 billion high speed wireless system.

    The links contained are hot ,so click and go for more info.
     
  11. MonacoMike

    MonacoMike Active Member SILVER Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    97 270DA 5k Kohler A/C,
    85 Monaco 197
    7.4 300hp BII,
    260hp Alpha 1
    Thanks, the report was interesting to read.

    MM
     

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