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LightSquared is a company that sought to develop a wholesale 4G LTE wireless broadband communications network integrated with satellite coverage across the United States using a block of frequencies located near the band used by the Global Positioning System (GPS). However, the issue of interference (using high-powered ground transmitters in spectrum intended for low-powered signals from satellites) has caused problems. On February 5, 2015, a federal district court judge in Manhattan dismissed many, but not all, of the claims in litigation wherein LightSquared and its investors had sued various GPS companies alleging breach of contract and unjust enrichment for "selling GPS receivers designed to trespass on LightSquared’s spectrum.” On February 14, 2012, the U.S. Federal Communications Commission (FCC) moved to bar LightSquared's planned national broadband network after being informed by the National Telecommunications and Information Administration (NTIA), "the federal agency that coordinates spectrum uses for the military and other federal government entities," that "there is no practical way to mitigate potential interference at this time."〔FCC press release "(Spokesperson Statement on NTIA Letter--LightSquared and GPS )" February 14, 2012〕〔Paul Riegler, FBT. "(FCC Bars LightSquared Broadband Network Plan )." February 14, 2012. Retrieved February 14, 2012.〕 LightSquared is challenging the FCC's action. Despite negotiating with creditors,〔(Falcone gets extension in LightSquared creditor talks )〕 on May 14, 2012, LightSquared filed for bankruptcy. ==Origins== LightSquared traces its roots back to 1988 and was known as American Mobile Satellite Corporation and later as Mobile Satellite Ventures after a merger between Motient Corporation and TMI Communications. It was most recently known as SkyTerra, a company that provided mobile satellite communications services. The company has operated in the North American market with two geostationary satellites since 1995. MSAT-2 is licensed in the United States and was launched in 1995. MSAT-1 is licensed in Canada and was launched in 1996. LightSquared has received $2.9 billion in assets from Harbinger Capital Partners and affiliates, as well as more than $2.3 billion in debt and equity financing. LightSquared’s SkyTerra 1 launched from the Baikonur Cosmodrome in Kazakhstan on November 14, 2010. The satellite, one of the largest commercial satellites ever built, was launched aboard a Russian Proton-M/Briz-M rocket, weighs 5.4 tons, and carries the largest commercial reflector antenna ever put into space. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「LightSquared」の詳細全文を読む スポンサード リンク
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