US6707422B2

5G,4G,3G,2G

Title

METHOD AND APPARATUS FOR MEASUREMENT PROCESSING OF SATELLITE POSITIONING SYSTEM (SPS) SIGNALS

Application Number:

US20010992522

Publication Date:

16-03-2004

Current Assignee:

Family ID:

Application Date:

13-11-2001

Publication Country:

US

Priority Date:

02-07-1998

Declaring Company:

Abstract  Abstract

A method and apparatus is disclosed for measurement processing of Satellite Positioning System (SPS) signals. A plurality of SPS signals from a corresponding plurality of SPS satellites are received in an SPS receiver. The signal environment corresponding to the location in which the SPS receiver is located is characterized to produce signal environment data. In one exemplary embodiment an information source such as a cellular network based database is searched to retrieve the signal environment data given an approximate location of the GPS receiver. This approximate location may be specified by a location of a cell site which is in cellular radio communication with a cellular communication device which is co-located with the GPS receiver. One or more parameters related to signal characteristics of the satellite signals are defined. Threshold values for the parameters are determined using the signal environment data. Code phases corresponding to times of arrival of respective satellite signals from the plurality of satellites are measured. The data representing measured times of arrival are examined using threshold values for the parameters to produce a set of times of arrival from which a location fix for the GPS receiver is calculated. Other methods and apparatuses for other embodiments of the invention are also described.

Note:

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The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent

Implicitly disclosed patent

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