On AoA estimation in the presence of mutual coupling: Algorithms and performance analysis

Bazzi, Ahmad; Slock, Dirk TM
Research Report RR-16-326

This paper presents two novel methods for Angle-of-Arrival (AoA) estimation
in the presence of unknown mutual coupling. We mainly focus on
the first method, where we show that this method could estimate AoAs of
multiple sources when more mutual coupling parameters are included in the
model, compared to existing methods. Furthermore, we derive a closed form
Mean-Squared-Error (MSE) expression of the proposed method and compare
it to the MSE of MUSIC with known coupling parameters. In addition,
the derived MSE expression is also compared to the Cram´er-Rao bound of
joint AoA and mutual coupling estimation in the asymptotic regime, i.e. at
high signal-to-Noise ratio or large number of antennas. The second method
serves as a refinement of the first one. Simulation results have demonstrated
the potential of the proposed methods as they enjoy better performance than
existing methods. A better description of the paper could be found in the
Conclusions section.

Systèmes de Communication
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