Reply to “Comments on `L-Shape Two-Dimensional Arrival Angle Estimation With Propagator Method´”

In this reply to the paper by Shu, Liu and Lu (see ibid., p.1502-3, 2008), a novel method with low-complexity, but showing neither estimation failure nor the pair-matching problems, is described for the two-dimensional DOA estimation. The authors in the previous papers (Kikuchi et al., 2006; Gu et al, 2008)also proposed two methods different from that in (Van der Veen et a., 1992) to achieve the automatic pair matching by employing the L-shaped array configuration. The method in this reply is also different from the ones in (Kikuchi et al., 2006; Gu et al, 2008). In this reply, an independently developed algorithm is presented by using the unitary root MUSIC and unitary MUSIC and changing the L-shape to a cross-shaped array configuration.