From NextGov: LightSquared threatened litigation if the Federal Communications Commission does not clear it to operate a network of up to 40,000 cell towers the GPS industry claims will interfere with GPS receivers.

Jeff Carlisle, LightSquared's vice president of regulatory affairs and public policy, told reporters at a briefing Monday that any interference with high-precision GPS receivers from the company's planned network results from the fact that those receivers "look" into the adjacent frequency band.

In a letter to FCC Chairman Julius Genachowski Monday, Carlisle said that GPS manufacturers have ignored standards developed by the Defense Department to block reception of transmissions from adjacent bands.

Carlisle said LightSquared has tried to conduct itself as a "good neighbor" to GPS receiver manufacturers and users, but threatened legal action if the FCC does not green light the company's network after the latest round of tests are completed. FCC regulations make it clear, Carlisle said, that GPS receivers are not entitled to protection from interference "if they are listening outside their band." Read the entire article here.