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A conjugate augmented approach to direction-of-arrival estimation

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2 Author(s)
Zhilong Shan ; Sch. of Comput., South China Normal Univ., Guangzhou, China ; Yum, T.S.P.

In this paper, we propose a new Direction-of-Arrival (DOA) estimator called Conjugate Augmented MUSIC (CAM). The basic idea of CAM is to use the second-order statistics of the received signals to get the conjugate steering matrix. This, together with the steering matrix, is used to find the fourth-order cumulants. From that the source directions are obtained using the MUSIC-like algorithm. CAM can resolve two times the number of directions when compared to MUSIC-like estimator. Moreover, simulation results show that the estimation capacity, angle resolution, immunity to noise, and the number of required snapshots are all better than MUSIC-like algorithm.

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Signal Processing, IEEE Transactions on  (Volume:53 ,  Issue: 11 )