Method for finding signal direction using modal antenna
AssigneeEthertronics, Inc.
InventorsOlivier Pajona, Michael Roe, Mohd Faizal Mohd Zaini, Sebastian Rowson, Laurent Desclos
Life of this patent
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Abstract
A method for obtaining the direction of a signal incoming to a communication device is provided using a modal antenna that has multiple modes corresponding to multiple radiation patterns with a single feed.
Claims27
A method for obtaining a direction of a signal incoming to a communication device, which is provided with a modal antenna having a plurality of modes corresponding to a plurality of radiation patterns, respectively, the method comprising:
- obtaining a gain of the modal antenna at each of predetermined angles for each of the plurality of radiation patterns;
- first computing a first difference in gain at each of the predetermined angles between each selected pair of the plurality of radiation patterns to obtain a gain variation;
- measuring a signal strength in a configuration with each of the plurality of radiation patterns;
- second computing a second difference in signal strength between configurations with each selected pair of the plurality of radiation patterns to obtain a signal strength variation;
- third computing a third difference between the first difference and the second difference for each of the predetermined angles and for each selected pair of the plurality of radiation patterns;
- summing a plurality of third differences over all selected pairs of the plurality of radiation patterns to have a value for each of the predetermined angles;
- and
- determining an angle of arrival (AOA) of the signal, the AOA giving a minimum among a plurality of values obtained for the predetermined angles, respectively, in the summing.
A method for obtaining a direction of a signal incoming to a communication device, which is provided with a modal antenna having a plurality of modes corresponding to a plurality of radiation patterns, respectively, the method comprising:
- obtaining a gain of the modal antenna at each of predetermined angles for each of the plurality of radiation patterns;
- first computing a first difference in gain at each of the predetermined angles between each selected pair of the plurality of radiation patterns to obtain a gain variation;
- measuring a signal strength in a configuration with each of the plurality of radiation patterns;
- second computing a second difference in signal strength between configurations with each selected pair of the plurality of radiation patterns to obtain a signal strength variation;
- third computing a third difference between the first difference and the second difference for each of the predetermined angles and for each selected pair of the plurality of radiation patterns;
- judging if the third difference is less than a predetermined threshold for each of the predetermined angles for each selected pair of the plurality of radiation patterns;
- storing the angle as one of the predetermined angles if the third difference is less than the predetermined threshold for each of the predetermined angles for each selected pair of the plurality of radiation patterns;
- determining an angle of arrival (AOA) of the signal, the AOA giving a minimum among a plurality of third differences obtained for the predetermined angles, respectively, in the third computing, for each pair of the plurality of radiation patterns, the predetermined angles being obtained in the storing.
Dependencies are inferred from the claim text.