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S-GPS
Simultaneous GPS or S-GPS is a method to enhance a mobile phone's satellite-based position reporting ability to a carrier. Ordinarily, a built-in , multi- dimensional GPS device is used to determine the location of an E911 call made from CDMA phones. By using a time-multiplexed scheme called TM-GPS, the reception of the telephone call and the GPS signal are alternated one after the other, requiring only one RF radio. As the name implies, Simultaneous GPS allows a cellphone to receive both GPS and voice data at the same time, which improves sensitivity and allows service providers to offer location-based services. The use of two radios with a single antenna imparts new design challenges, but the commercial availability of S-GPS chipsets, from manufacturers such as Qualcomm, has led to adoption of the method in newer handsets〔(【引用サイトリンク】title=Improving S-GPS sensitivity )〕 and Samsung's latest processors (as the ones used in Galaxy S III, Note 10.1, Note 2〔(Samsung Galaxy Note 10.1 )〕). ==References==
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「S-GPS」の詳細全文を読む
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