S-GPS
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Simultaneous GPS (S-GPS) is a method to allow a GPS reception and CDMA communications to operate simultaneously in a mobile phone.
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Simultaneous GPS (S-GPS) is a method to allow a GPS reception and CDMA communications to operate simultaneously in a mobile phone.
Ordinarily, cellular geolocation and a built-in GPS receiver 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 radio receiver.
Excerpted from Wikipedia’s “S-GPS” article, available under the CC BY-SA 4.0 licence.