Multipath assistance for pilot phase measurement processes

Details Multipath assistance for pilot phase measurement processes Multipath assistance for pilot phase measurement processes

2006-02-14

2006-02-14

Orgad, Edan (Department: 2684)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S067110, C455S012100, C455S423000, C455S065000, C342S357490

Reexamination Certificate

active

06999778

ABSTRACT:
A method for enhancing the accuracy of Advanced Forward Link Trilateration (AFLT) position location calculations is disclosed. A position determination entity (PDE) constructs a statistical database of pilot phase measurements reported by mobile stations (MSs) located in a geographic region about a reference base station (BS). When a MS's location is to be calculated, the MS reports a set of PN phase offsets to the PDE. Using only that set of PN phase offsets, the PDE determines a rough estimate of the MS's location using conventional AFLT and also determines the region within which the MS is located. If the PDE determines that the MS did not report one or more earlier arriving PN phase offsets but reported a delayed multipath component, the PDE sends a message to the MS to look for an earlier arriving PN phase offset at a certain time prior to the reported PN phase offset.

REFERENCES:
patent: 2002/0077125 (2002-06-01), Hunzinger
patent: 2003/0054835 (2003-03-01), Gutowski et al.
patent: 2003/0125046 (2003-07-01), Riley et al.
patent: 2003/0215035 (2003-11-01), Amerga et al.
patent: 2004/0002344 (2004-01-01), Moeglein et al.
patent: 2004/0203853 (2004-10-01), Sheynblat

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