For direction finding (DF) systems that derive the emitter angle of arrival (AOA) from the phase of a complex-valued signal, the AOA accuracy can often be improved by processing multiple data records, particularly when the signal-to-noise ratio is low. There are three closely related but distinctly different approaches to improving the accuracy of AOA estimation. The main goal of this paper is to present a unified theory for these AOA averaging techniques using a Gaussian signal model. Detailed algorithm analysis and performance comparisons are provided.

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Keywords Angle of arrival (AOA) estimation, AOA averaging methods, Direction finding, Maximum likelihood estimation
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Conference 2010 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010
Wang, S. (Sichun), Inkol, R. (Robert), Rajan, S, & Patenaude, F. (François). (2010). Strategies for improving angle of arrival accuracy in direction finding systems. In Canadian Conference on Electrical and Computer Engineering. doi:10.1109/CCECE.2010.5575260