Angle of arrival estimation
AssigneeGM Global Technology Operations LLC
InventorsOded Bialer, Igal Bilik
Life of this patent
Estimating the term…
Abstract
A method is disclosed for determining an angle of arrival of an incident plane wave received by an antenna array. The method includes receiving signals from a plurality of antenna receiving channels, determining a set of possible angles of arrival of the incident plane wave based on the signals received at the plurality of receiving channels, measuring a pulse delay of the incident plane wave between the signals received at the plurality of receiving channels, and calculating the angle of arrival of the incident plane wave based on the set of possible angles of arrival and the measured pulse delay.
Claims20
A method for determining an angle of arrival of an incident plane wave received by an antenna array, the method comprising the steps of:
- receiving signals from a plurality of antenna receiving channels;
- determining a set of possible angles of arrival of the incident plane wave based on the signals received at the plurality of receiving channels, wherein determining the set of possible angles of arrival includes evaluating the power for a phase-corrected sum of a beamforming spectrum of the antenna array that references each signal of the signals received from the plurality of antenna receiving channels;
- measuring a pulse delay of the incident plane wave between the signals received at the plurality of receiving channels;
- and
- calculating the angle of arrival of the incident plane wave based on the set of possible angles of arrival and the measured pulse delay.
A method for estimating an angle of arrival of an incident plane wave received by an antenna array having a plurality of uniformly widely-spaced antenna elements, the method comprising the steps of:
- receiving signals from the plurality of antenna elements in response to the incident plane wave;
- determining a phase difference between the signals received at the plurality of antenna elements;
- determining a set of possible angles of arrival of the incident plane wave based on the phase difference between the signals received at the plurality of antenna elements, wherein determining the set of possible angles of arrival includes evaluating the power for a phase-corrected sum of a beamforming spectrum of the antenna array that references each signal of the signals received from the plurality of antenna elements;
- determining a time of arrival difference between the signals received at the plurality of antenna elements;
- and
- calculating an unambiguous angle of arrival of the incident plane wave based on the set of possible angles of arrival and the time of arrival difference between the signals received at the plurality of antenna elements.
A system for calculating an unambiguous angle of arrival of an incident plane wave, the system comprising:
- an antenna array having a plurality of uniformly widely-spaced antenna elements;
- a receiver and a signal processor configured to receive signals from the plurality of antenna elements in response to the incident plane wave, and wherein the receiver and/or the signal processor are configured to:
- determine a set of possible angles of arrival of the incident plane wave based on the signals received at the plurality of antenna elements, wherein the set of possible angles of arrival are due to phase ambiguities, wherein determining the set of possible angles of arrival includes evaluating the power for a phase-corrected sum of a beamforming spectrum of the antenna array that references each signal of the signals received from the plurality of antenna elements;
- measure a pulse delay of the incident plane wave between the signals received at the plurality of antenna elements;
- and
- calculate the unambiguous angle of arrival of the incident plane wave based on the set of possible angles of arrival and the measured pulse delay.
Dependencies are inferred from the claim text.