Unambiguous AOA estimation using SODA interferometry for electronic surveillance

This paper presents two fast and computationally efficient interferometric algorithms that allow high accuracy, unambiguous angle-of-arrival (AOA) estimates to be obtained using physically large wideband antennas that are suitable for electronic surveillance. The performance of the algorithms are compared against conventional interferometric techniques using simulations and are also verified experimentally.

[1]  E. J. Baghdady Hybrid interferometry for high-resolution DOA measurement , 1989, Proceedings of the IEEE National Aerospace and Electronics Conference.

[2]  C.J. Bleakley,et al.  Phase-Difference Ambiguity Resolution for a Single-Frequency Signal , 2010, IEEE Signal Processing Letters.

[3]  He-Wen Wei,et al.  Performance analysis and comparison of correlative interferometers for direction finding , 2010, IEEE 10th INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS.

[4]  E. H. Satorius,et al.  Direction of arrival estimation via extended phase interferometry , 1995 .

[5]  Steven Kay,et al.  A Fast and Accurate Single Frequency Estimator , 2022 .

[6]  Elizabeth Ralston,et al.  Ambiguity Resolution in Interferometry , 1981, IEEE Transactions on Aerospace and Electronic Systems.

[7]  James B. Y. Tsui,et al.  Digital Techniques for Wideband Receivers , 1995 .

[8]  C. Brinegar Passive direction finding: combining amplitude and phase based methods , 2000, Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093).