Computationally-efficient estimation of the location of a...

Details Computationally-efficient estimation of the location of a... Computationally-efficient estimation of the location of a...

2008-04-18

2010-12-07

Phan, Huy (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S404200, C455S456600, C455S229000, C455S421000, C455S422100

Reexamination Certificate

active

07848762

ABSTRACT:
A method of using a non-GPS-derived technique to estimate the location of an Assisted-GPS-enabled wireless terminal for the purposes of generating location-specific assistance data for the wireless terminal is disclosed. The wireless terminal then uses the assistance data to acquire and process one or more GPS signals and to derive information that is probative of the wireless terminal's location. The GPS-derived location information is then combined with non-GPS-derived location to form an estimate of the location of the wireless terminal that is better than can be derived from either alone. This combination of GPS-derived and non-GPS techniques is particularly useful when the wireless terminal can only acquire one or two GPS signals because it is not possible to determine the location of the wireless terminal with only two GPS signals alone.

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