US 6,266,014 B1 · Methods and apparatus to position a mobile receiver using downlink signals part IV

Abstract

The invention consists of methods and apparatus to estimate the position and velocity of a Mobile Receiver (MR) using either the Time Of Arrival (TOA) of signals received by the MR, their Phase Of Arrival (POA), their Strength Of Arrival (SOA), their Frequency Of Arrival (FOA), or a combination thereof, with respect to a reference produced by a Reference Receiver (RR) of known location. In order to solve for the coordinates of the MR, the invention uses either hyperbolic multilateration based on Time Difference Of Arrival (TDOA), or linear multiangulation based on Phase Difference Of Arrival (PDOA), or both. In order to solve for the velocity of the MR, the patent uses FOA based on Frequency Difference Of Arrival (FDOA).

Claims29

Dependent claims

A method of estimating the location of a mobile receiver from a plurality of signals transmitted from a plurality of base stations, the method comprising the steps of:

making a set of observations of the signals;
using misclosures and/or standardized residuals to flag observations that might contain a blunder;
and
estimating the location of the mobile receiver by performing a location estimation process on the set of observations.

1 more element

Dependencies are inferred from the claim text.

Methods and apparatus to position a mobile receiver using downlink signals part IV

Life of this patent

Methods and apparatus to position a mobile receiver using downlink signals part IV

Life of this patent

Abstract

Claims29