Enhanced suppression of multipath interference

Details Enhanced suppression of multipath interference Enhanced suppression of multipath interference

1996-08-09

1998-06-23

Vo, Nguyen

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

455506, 455 65, H04Q 720

Patent

active

057714568

ABSTRACT:
A method for suppressing the effects of multipath signals in determination of the location of a mobile user, using the speed or magnitude of the velocity v of the user to determine the procedure(s) to be used to determine the range or pseudorange values corresponding to the GPS, GLONASS, LORAN, FM subcarrier or other location determination (LD) signals received from a plurality of LD signal sources. Where the user velocity v satisfies v.ltoreq.v1, or v.gtoreq.v2 (v1 and v2 being two selected velocity threshold values with 0<v1<v2), the range or pseudorange values are determined by a first procedure and by a second procedure, respectively, that reduce or eliminate the effects of multipath signals. Where the user velocity v satisfies v1<v<v2, the range or pseudorange values are determined by a blend of the first and second procedures.

REFERENCES:
patent: 4369444 (1983-01-01), Blumling
patent: 4485384 (1984-11-01), Connor
patent: 5347286 (1994-09-01), Babitch
patent: 5379449 (1995-01-01), Porambo
patent: 5396540 (1995-03-01), Gooch
patent: 5437055 (1995-07-01), Wheatley
patent: 5450448 (1995-09-01), Sheynblat

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