A approach to DOA estimation of distributed signals using rotational invariance structure
Qun Wan · Chinese Journal of Radio Science · 2007
In some fields, the performance of traditional DOA parameter estimation algorithms descend badly because of the influence of multipath signals with distribution character. By using the known signal information and estimating the rotational factors induced by distributed signals between adjacent array elements, this paper presents a DOA estimation algorithm without search process. The DOA parameters can be estimated by rotational invariance structure between the adjacent array elements. Comparing with traditional point-based ESPRIT algorithms, the method proposed can restrain multipath distribution and is not sensitive to different distribution forms, and can restrain some phase errors as well. Finally simulations show its correctness.