Method and mobile station for autonomously determining an angle of arrival (AOA) estimation
View Patent ↗A method ( 900 ) and a mobile station ( 160 ) for autonomously determining an angle of arrival (AOA) estimation are described herein. The mobile station ( 160 ) may receive information associated with a plurality of sectors ( 200 ) from a base station ( 140 ) having a plurality of antennas. Each of the plurality of antennas may provide communication service to one of the plurality of sectors ( 200 ). The information associated with the plurality of sectors ( 200 ) may be an antenna pattern, a boresight, a downtilt, and a signal strength value associated with each of the plurality of antennas. Based on the information associated with the plurality of sectors ( 200 ), the mobile station ( 160 ) may determine an antenna gain difference, which in turn, is used to determine the angle of arrival (AOA) estimation.
1. In a wireless communication system, wherein a communication cell includes a plurality of sectors, a method for autonomously determining an angle of arrival (AOA) estimation of a mobile station, the method comprising:
requesting within the mobile station information associated with the plurality of sectors from a base station having a plurality of antennas, each of the plurality of antennas providing communication service to one of the plurality of sectors in the communication cell;
receiving the requested information associated with the plurality of sectors;
determining a signal difference between a first downlink signal and a second downlink signal based on the requested information associated with the plurality of sectors, the first downlink signal being associated with a first antenna of the base station and the second downlink signal being associated with a second antenna of the base station;
normalizing the first and second downlink signals to determine an antenna gain difference between the first and second downlink signals; and
determining a bearing along the first downlink signal in which the signal difference matches the antenna gain difference, the first downlink signal having greater signal strength than the second downlink signal.