for the processing of the GPS signal and is referred to as Assisted GPS (A-GPS). While
high-sensitivity GPS chipsets have been adopted in recent years, A-GPS does not work
well indoors and as a result complementary positioning systems are employed under
|Description of the positioning method behind the WiFi positioning system|
|Statements by Skyhook Wireless regarding the performance of its WiFi positioning||system|
Most GPS-enabled cell phones, including the 3G iPhone, employ a technology known as Assisted GPS (A-GPS). With A-GPS many of the functions of a full GPS receiver areperformed by a remote GPS location server. This remote server provides the A-GPS
mobile device with satellite orbit and clock information; the initial position and time
estimate; satellite selection, range and range date; and position computation.