A new direction-of-arrival estimator for coherent signals in spatially correlated noise is devised in this paper. By constructing a set of fourth-order cumulant based Toeplitz matrices, the coherent signals can be decorrelated. Moreover, by utilizing the joint diagonalization structure of these Toeplitz matrices, a new cost function that does not require any a priori information of the source number is developed. Numerical examples are provided to demonstrate the effectiveness of the proposed approach.
Bibliographical noteFunding Information:
The work described in this paper was in part supported by the NSFC/RGC Joint Research Scheme sponsored by the Research Grants Council of Hong Kong and the National Natural Science Foundation of China (Project No.: N-CityU 104/11 , 61110229/61161160564 ), by the National Natural Science under Grant 61222106 and Grant 61171187 and by the Shenzhen Kongqie Talent Program under Grant YFZZ20111013 .
© 2015 Published by Elsevier B.V.
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- Coherent signals
- Direction-of-arrival (DOA) estimation
- Fourth-order cumulant
- Joint diagonalization
- Toeplitz matrix