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US 6,456,956 B1Granted
Algorithm for selectively suppressing NLOS signals in location estimation
AssigneeVerizon Laboratories Inc.
InventorLi Xiong
Life of this patent
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Abstract
A method of estimating the position of a transmitter using angle-of-arrival values determined at each of a plurality of base stations. The method includes calculating a position estimation using the angle-of-arrival values from all of the base stations, calculating an error at each of the base station, and removing those base stations whose error exceeds a threshold from the calculation.
Claims2
A method of estimating the position of a transmitter using a direction estimation from each of a plurality of receivers comprising:
- a) calculating a first position estimation using each of the direction estimations;
- b) calculating an error in the direction estimation for each receiver;
- c) selecting those receivers whose measurement error is below a first threshold;
- d) calculating a second position estimation using the direction estimations of the selected receivers;
- and
- e) recursively performing steps c) and d) with lower first threshold values until all of the selected receivers have measurement errors below a second threshold.
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Dependencies are inferred from the claim text.