Detecting multipath and determining positioning measurement uncertainty
First Claim
1. A method, in a first node in a wireless communications network, for use in positioning, the method comprising:
- collecting, for each of a plurality of wireless devices, one or more timing measurements, each measurement corresponding to at least one anchor node antenna having a known location;
determining a measurement deviation for each measurement by comparing the measurement to an expected timing measurement corresponding to a reference location; and
using the measurement deviations for one or more of estimating measurement quality of one or more subsequent positioning measurements, estimating uncertainty associated with one or more subsequent positioning estimates, and estimating an effect of multipath on one or more subsequent positioning measurements or estimates.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques are disclosed for determining measurement uncertainty of and/or multipath effects on positioning measurements, based on the residual deviations between timing measurements and high-accuracy location results. An example method begins with collecting (510) a plurality of timing measurements or ranging measurements, or both, each measurement corresponding to at least one anchor node antenna having a known location. A measurement deviation is determined (520) for each measurement by comparing the measurement to a corresponding reference location. The measurement deviations are used (530) to estimate measurement quality for one or more subsequent positioning measurements, and/or uncertainty associated with one or more subsequent positioning estimates, and/or an effect of multipath on subsequent positioning measurements or estimates. In some embodiments, a covariance matrix is calculated from the measurement deviations and is used to determine statistical information or multipath effects for measurements corresponding to a particular one of the anchor node antennas.
-
Citations
34 Claims
-
1. A method, in a first node in a wireless communications network, for use in positioning, the method comprising:
-
collecting, for each of a plurality of wireless devices, one or more timing measurements, each measurement corresponding to at least one anchor node antenna having a known location; determining a measurement deviation for each measurement by comparing the measurement to an expected timing measurement corresponding to a reference location; and using the measurement deviations for one or more of estimating measurement quality of one or more subsequent positioning measurements, estimating uncertainty associated with one or more subsequent positioning estimates, and estimating an effect of multipath on one or more subsequent positioning measurements or estimates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A method, in a second node in a wireless communications network, for using measurement quality information in positioning, the method comprising:
-
receiving measurement deviations, for each of a plurality of wireless devices, from a first node, wherein said measurement deviations correspond to a plurality of timing measurements, each measurement deviation corresponding to at least one anchor node antenna having a known location; and using the received measurement deviations for one or more of estimating measurement quality of one or more subsequent positioning measurements, estimating uncertainty associated with one or more subsequent positioning estimates, and estimating an effect of multipath on one or more subsequent positioning measurements or estimates. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A node for use in a wireless communication system, the node comprising
a network interface circuit adapted for communication with one or more other nodes in the wireless communication system, and a processing circuit, wherein the processing circuit is configured to: -
collect, for each of a plurality of wireless devices, one or more timing measurements, each measurement corresponding to at least one anchor node antenna having a known location; determine a measurement deviation for each measurement by comparing the measurement to an expected timing measurement corresponding to a reference location; and use the measurement deviations for one or more of estimating measurement quality of one or more subsequent positioning measurements, estimating uncertainty associated with one or more subsequent positioning estimates, and estimating an effect of multipath on one or more subsequent positioning measurements or estimates.
-
Specification