SPATIAL SMOOTHING WITH UNIFORM CIRCULAR ARRAYS

In this paper, we extend and analyse spatial smoothing with uniform ci rcular arrays (UCA's). In particular, we study the performance of the Root-MUSIC with smoothing in the presence of correlated sources, finit e data perturbations and errors in transformed steering vector that ar ise due to some approximations made to enable the extension of the Roo t-MUSIC and smoothing to UCA. Expressions are derived for the asymptot ic performance of the Root-MUSIC with smoothing applied to the transfo rmed UCA data. An attempt has been made to bring out the impact of bot h forward and forward-backward smoothing. Computer simulations an prov ided to demonstrate the usefulness of the analysis.