Patent ID: 9553639
Date: 2017-01-24
CPC Classifications: G01S,H04B,H04W

Claim:
1. A method of locating user equipment (UE) in a wireless communication network, the method comprising: detecting signaling of a UE via multiple wireless access points in the wireless communication network while the UE is in an offline phase; training the wireless access points with the UE while the UE is in the offline phase; storing signatures via said training with the UE, each stored signature comprising signal strength and Multiple Input/Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) channel estimation information for the multiple wireless access points; normalizing the MIMO-OFDM channel estimation information of the stored signatures by multiplying antenna orientations of the UE to a ratio of maximum antenna gain of the UE towards each wireless access point; detecting that the UE has entered an online phase; comparing MIMO-OFDM channel estimation and signal strength information of the UE for each of the wireless access points, while the UE is in the online phase, to the stored signatures; and determining a location of the UE in the wireless communication network based on the comparisons.