A new high-resolution direction finding architecture using photonics and neural network signal processing for miniature air vehicle applications
Pace, Phillip E.
Iatrou, Steven J.
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This paper investigates the design of an interferometric direction finding receiver using photonic components for signal mixing and a multi-layer perceptron for data analysis. The complete system was tested with a 2.4 GHz continuous signal in an anechoic chamber. Test results showed that the compact antenna and receiver design was capable of measuring direction of arrival with 1° resolution over a 180° field of view while keeping mean error below 0.5°. It was also demonstrated that the design is insensitive to phase alignment of receiver channels, thus simplifying future receiver design. Improvements were recommended for a design theoretically capable of providing 0.25° angle resolution.
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