Methods and systems for estimating angle of arrival

摘要

Methods and systems for estimating an angle of arrival are provided. In an embodiment, a system for estimating angle of arrival includes a snapshot determining module configured to receive a signal from each antenna of an antenna array and to generate a snapshot vector including values based on the signals and an angle of arrival processing module configured to estimate an angle of arrival for the electromagnetic signal relative to the antenna array based on the snapshot vector. Each signal is representative of an electromagnetic signal incident on a respective antenna of the antenna array and each value is representative of a phase of a respective signal.

主权项

1. A system for estimating an angle of arrival, comprising:
a snapshot determining module configured to receive a signal from each antenna of an antenna array and to generate a snapshot vector including values based on the signals, wherein each signal is representative of an electromagnetic signal incident on a respective antenna of the antenna array, wherein each value is representative of a phase delay of a respective signal, and wherein the snapshot determining module comprises:
a joint estimator configured to estimate a modulation index and a frequency offset of the electromagnetic signal based on a phase of the electromagnetic signal and a bit pattern of a first portion of each of the signals; anda derotator configured to, based on the estimated modulation index and the estimated frequency offset, derotate a second portion of each of the signals to generate each of the values; and an angle of arrival processing module configured to estimate an angle of arrival for the electromagnetic signal relative to the antenna array based on the snapshot vector.