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MDS America, Inc (MDSA) is a wireless Internet and wireless cable TV technology provider based in Stuart, Florida. MDS America was the primary party responsible for the invalidation of Northpoint Technology Inc's patents having to do with terrestrial rebroadcast of satellite signals.〔(Appellate Ruling )〕 MDS Operations, an affiliated company, participated in recent auctions in 2005 and 2006 held by the Federal Communications Commission (FCC) of the frequency band of 12.2 - 12.7 GHz, which it christened ''MVDDS''.〔(TechWeb definition )〕 ==Technology== The receiver of MDSA's system uses a technology that is patented under US patent number 7,286,795.〔(United States Patent: 7286795 )〕 The MVDDS system uses similar spectrum to a DBS (Direct Broadcast Satellite) system, and is capable of operating at the same frequencies without interference. The MDSA two-way system competes against satellite internet access; the shorter round trip distance of only a few hundred kilometers reduces the latency compared with a geostationary satellite's 44,000 mile 250ms latency. The MDSA system has the disadvantage of requiring infrastructure closer to the user - a satellite can cover a significant proportion of the country, instead of the maximum 200 km radius of an MDSA base station. However, since the MDSA signal can be sectorized, MDSA's bandwidth, unlike that of satellite, can be multiplied in most geographical areas. For video distribution, this means that local channels and local advertising can be injected into the signal, unlike with DBS satellite systems. MDS America Inc. (MDSA) built the first Terrestrial Digital Television distribution system in Ireland. 〔(Ireland System )〕 As well MDS America has built the largest MVDDS systems in the world, including the 700 channel capacity system in the United Arab Emirates.〔http://www.mdsamerica.com/index.cfm/linkservid/87EFCE99-1517-5C85-A49801570D54AA7D/showMeta/0/〕 In 2011 MDS America built the first commercial wide-area MVDDS system in the United States, in Albuquerque New Mexico.This system can provide up to 50Mbit/s service to homes and businesses in the Albuquerque area. This is the first ever business/residential service delivering 50Mbit/s by wireless to an entire metropolitan area.〔http://www.bizjournals.com/albuquerque/print-edition/2011/12/09/mds-america-debuts-ultra-fast-wireless.html〕 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「MDS America」の詳細全文を読む スポンサード リンク
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