CPC H04W 4/023 (2013.01) [G01S 3/74 (2013.01); G01S 5/0215 (2013.01); G01S 5/0218 (2020.05); G01S 5/0252 (2013.01); G01S 5/0258 (2020.05); G01S 5/0263 (2013.01); G01S 5/0273 (2013.01); G01S 5/10 (2013.01); G01S 5/14 (2013.01); G01S 13/222 (2013.01); G01S 13/24 (2013.01); G01S 13/767 (2013.01); G01S 13/878 (2013.01); H01Q 1/241 (2013.01); H01Q 1/246 (2013.01); H01Q 21/28 (2013.01); H04L 5/005 (2013.01); H04L 5/0048 (2013.01); G01S 2013/466 (2013.01); G01S 2013/468 (2013.01)] | 34 Claims |
1. A method for determining an elevation of a user equipment (UE) in communication with a wireless system, the method comprising:
identifying a plurality of signals from receive channels associated with at least two antennas or four or more omnidirectional antennas as previously known signals based on buffered I/Q samples associated with each of the signals;
based on the previously known signals from each receive channel determining an angle of arrival from the UE to the at least two antennas or the four or more omnidirectional antennas, wherein determining the angle of arrival includes determining a sub-sample estimation of at least one of a direct line of sight (DLOS) flight time and a direct path flight time from the UE to each antenna among the at least two antennas or the four or more omnidirectional antennas, wherein the sub-sample estimation mitigates a mirror image of a true line of bearing (LOB) between the UI and the at least two antennas or the four or more omnidirectional antennas; and
utilizing the angle of arrival to calculate the elevation of the UE.
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