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US08193978B2 Positioning system and method using GPS with wireless access points 有权
具有无线接入点的GPS定位系统和方法

Positioning system and method using GPS with wireless access points
Abstract:
Embodiments of an improved assisted global positioning system (GPS) method and system are described. Wireless access points send assistance data to GPS receivers that are integrated into cellular chipsets and other chipsets. The access points may also act as fixed location references for differential GPS (DGPS) mobile stations. Errors caused by multipath travel of the GPS signals are reduced by using fixed location reference receivers.
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