What is AAoA (Azimuth angle of arrival)?

The angle of arrival (AoA) is the direction of the receiving signal and Azimuth is the angle of received signal. The azimuth range for which AOA can be effectively assessed is up to ±80 degrees in the front half-side of the equator of the AOA anchor, because of the electromagnetic limits of the anchor antenna array. The anchor antenna array is not designed to estimate AOA in its back half-side of the equator.