Method for determining location information
AssigneeMotorola, Inc.
InventorsNeal K. Patwari, Vernon Anthony Allen, Neiyer S. Correal, Matthew R. Perkins
Life of this patent
Estimating the term…
Abstract
A method is provided for estimating relative location information for wireless devices. Individual estimates are obtained from two or more alternative means that determining the relative location, such as range information, of first and second wireless devices with respect to each other (710, 720, 910, 920). At least one of these estimates involves an estimate of relative location between one of the first and second devices and a third device. These estimates are combined to provide a new estimate that is statistically more accurate than any one of the individual estimates (740, 940).
Claims21
A method of estimating relative location information for first and second wireless devices, comprising the steps of:
- obtaining a first estimate of relative location of the first wireless device with respect to the second wireless device;
- obtaining a second estimate of relative location of the first wireless device with respect to a third wireless device;
- and
- obtaining a new estimate of relative location of the first wireless device with respect to the second wireless device based on a combination that comprises the first and second estimates.
A method of determining relative location information of first and second devices with respect to a third device, comprising the steps of:
- obtaining a first estimate of distance between the first device and the third device;
- obtaining a second estimate of distance between the second device and the third device;
- determining that the first and second devices are close to each other with respect to their distance from the third device;
- and
- upon such determination, combining at least the first estimate and the second estimate to obtain a new estimate of distance to the third device for each of the first and second devices.
A method of determining relative location information of a first device with respect to a second device, comprising the steps of:
- obtaining a first estimate of distance between the first device and the second device;
- obtaining a second estimate of distance between the first device and the second device that comprises a first interval estimate of distance between the first device and a third device, and a second interval estimate representing at least a portion of the distance between the third device and the second device;
- combining the first estimate of distance and at least the first and second interval estimates of distance to obtain a new estimate of distance between the first and second devices.
Dependencies are inferred from the claim text.