Vou copiar para aqui um dos comentários lá colocados, pois acho que explica bem a situação. Eu, pelo menos, fiquei a perceber melhor o porquê das inteferências.
mdt Escreveu:Lightsquared bought the spectrum from another company. It was licensed for orbit to earth transmissions only. Lightsquared wants to use it for earth to earth transmission.
To describe what's going on, imagine you have a microphone and you're using it to do voice typing on your computer because you are disabled and can't type. Now, your microphone is a decent microphone, it ignores any sound that doesn't come from directly in front of it, unless it's louder than a shout.
Lightsquared wants to put a 10 foot high, 5 foot wide, concert grade speaker next to your computer so they can play music in your house and let every neighbor within a mile hear it. They'll be cranking it up to the point where your windows vibrate and rattle. However, it's your microphone's fault for not properly filtering their music out.
The GPS devices are fine at filtering out ground towers that broadcast on signals far away from them, and the only things that broadcast near them are satellite transmission, which are very weak. Now Lightsquared wants to set up towers that broadcast on the next frequency over from your GPS device but broadcasts at a power level thousands of times greater than the GPS satellites.
There's a reason why the FCC doesn't allow a radio station to have 97.3 and 97.5 in a single market within a specific broadcast range of each other. They would interfere with each other as they bled over into the other frequencies. Same as this.
