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belcffub

(595 posts)
2. not to derail your whole article... but lightsquared failed of their own accord
Tue Apr 10, 2012, 08:54 AM
Apr 2012
Why LightSquared failed: It was science, not politics

Despite the FCC's glowing remarks about LightSquared, the conditional approval made it clear the plan would never gain final clearance unless it could be implemented without interfering with GPS devices. In a nutshell, LightSquared needed a special waiver because it is trying to use spectrum allocated for low-power space-to-ground transmissions for something it was not originally allocated for: high-power ground-only transmissions that could fuel a nationwide wireless mobile broadband network. The portion of L-Band spectrum controlled by LightSquared is adjacent to the spectrum used by GPS devices, and GPS devices, according to repeated tests, would be unable to receive the signals intended for them because the high-power LightSquared signals would overpower the GPS ones.
....
In the end, though, it was not politics, but the results of repeated tests which the FCC could not ignore, and thus doomed LightSquared. The ruling against the company seems to be grounded in science and common sense, coming swiftly after the NTIA reported to the FCC that months of analysis determined that "LightSquared's proposed mobile broadband network will impact GPS services and that there is no practical way to mitigate the potential interference at this time. Furthermore, while GPS equipment developers may be able to mitigate these issues via new technology in the future, the time and money required for federal, commercial, and private sector users to replace technology in the field and the marketplace, on aircraft, and in integrated national security systems cannot support the scheduled deployment of terrestrial services proposed by LightSquared." The NTIA further noted potential problems for air traffic navigation and NASA's "future space-based GPS receivers" that would be sensitive even to LightSquared's usage of signals in the lower 10MHz.


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You are defending Lightsquared? ProgressiveProfessor Apr 2012 #1
I understand the frequency tech, please link the forum...regards uponit7771 Apr 2012 #12
not to derail your whole article... but lightsquared failed of their own accord belcffub Apr 2012 #2
Unnnnn, LS has a point..the weak signal isn't their fault and GPS companies had ample time (as.. uponit7771 Apr 2012 #13
sure... but to call this political... belcffub Apr 2012 #14
It is their fault since they are trying to convert frequency from space use to ground use ProgressiveProfessor Apr 2012 #19
It's not unlike health care. We pay more for less. mojowork_n Apr 2012 #3
uh oh youre taking a swipe the sacred cow called cell phone. this will not go over well leftyohiolib Apr 2012 #4
The phones are useful, convenient and sometimes even fun to use. mojowork_n Apr 2012 #5
add to that the profit margin is so high that users are gouged leftyohiolib Apr 2012 #10
The " interference" is with cheap defective GPS units ONLY. Why should Lightsquared pay to fix them? saras Apr 2012 #6
The real issue is the attempt to reclassify the band from low power space based signals to ProgressiveProfessor Apr 2012 #15
Interference accord99 Apr 2012 #17
This is the American business model. It was once called monopolistic and was unlawful. Egalitarian Thug Apr 2012 #7
Pretty good description of Lightsquared ProgressiveProfessor Apr 2012 #16
fascist marshall gaines Apr 2012 #8
The graph and interpretation is misleading usrname Apr 2012 #9
I think your response is misleading. mojowork_n Apr 2012 #11
i hate my cell phone facultyandstaffshow Apr 2012 #18
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