Method And Apparatus For Determining Non-Line Of Sight Bias Estimation

摘要

Various embodiments provide a method and apparatus for determining non-line of sight (NLOS) bias estimation based on estimated NLOS bias distributions at a number of anchors and the time of arrival (ToA) of a number of tag messages received at the anchors. In particular, using anchor redundancy, tag locations corresponding to the tag messages are estimated based on the NLOS bias distributions and the ToA and then the tag locations are used to update the NLOS bias distributions. The process of determining tag locations and updating the NLOS bias distributions is repeated until the NLOS bias distributions converge.

主权项

1. An apparatus for providing an NLOS bias distribution, the apparatus comprising:
a data storage; and a processor communicatively connected to the data storage, the processor being configured to:
determine a plurality of non-line of sight (NLOS) bias distributions corresponding to a plurality of anchors;determine a plurality of time of arrival values associated with reception of a plurality of tag messages at a plurality of participating anchors, the plurality of anchors comprising the plurality of participating anchors; wherein the plurality of participating anchors have a corresponding plurality of anchor locations;estimate a plurality of estimated tag locations based on the plurality of time of arrival values, the plurality of NLOS bias distributions and the plurality of participating anchors;determine a plurality of NLOS biases based on the plurality of estimated tag locations, the plurality of anchor locations, and the plurality of time of arrival values; andupdate the plurality of NLOS bias distributions based on the plurality of NLOS biases.