Sabtu, 02 April 2011

Save Our GPS (from 4G signals)



Back in February we talked about Garmin and Trimble’s report on interference to GPS signals that will be caused by the proposed 40,000 LTE network transmitters. The issue is still going on – and there is even a group: “Save Our GPS”, a coalition of industry leaders and companies that are trying to make FCC re-think their decision.

FCC granted a waiver allowing LightSquared – the company behind the proposed 40,000 ground transmitters – to repurpose the satellite spectrum right next to GPS signals (1525 MHz—1559 MHz vs 1559—1610 MHz) which could result in severe interference with the low powered signals that reach us from the orbit.

LightSquared will be competing with ClearWire to wholesale bandwidth for LTE (long term evolution) starting with a few markets third quarter of this year and covering 250 million Americans by the end of 2015. Even though the company says their launch schedule is still on track they now have to meet a few FCC mandates.

It is not only the Save Our GPS coalition but even Department of Defense and Department of Transportation that is voicing their concerns since GPS receivers are used for many things in their line of work (9 uses of GPS…). So now LightSquared is investigating the issue through an FCC-mandated working group; namely the United States Global Positioning System Industry Council (USGIC).

Jeff Carlisle, VP of LightSquared, says the company is cooperating with government agencies to address any potential problems with their GPS systems.
“We are sensitive to concerns about potential interference which is why we have fully committed ourselves to a comprehensive process that will ensure our network can coexist with GPS devices and agreed to only launch commercial operations when this process is completed to the FCC’s satisfaction.”
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