Adaptive processing for beamforming with coherent interference using uniform circular arrays
Digital Signal Processing
Horizontally UCA DOA estimation performance via spatial averaging
AICI'12 Proceedings of the 4th international conference on Artificial Intelligence and Computational Intelligence
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We analyze spatial smoothing with uniform circular arrays (UCAs). In particular, we study the performance of the Root-MUSIC with smoothing in the presence of correlated sources, finite data perturbations, and errors in the transformed steering vector that arise due to some approximations made while extending the Root-MUSIC and smoothing to UCA. Expressions are derived for the asymptotic performance of the Root-MUSIC with smoothing applied to the transformed UCA data. An attempt has been made to bring out the impact of both the forward and forward-backward smoothing. We consider UCAs with isotropic as well as directional sensors in our study. Computer simulations are provided to demonstrate the usefulness of the analysis