Journal of Systems Engineering and Electronics

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Polynomial-rooting based fourth-order MUSIC for direction-of-arrival estimation of noncircular signals

Lei Shen, Zhiwen Liu, Xiaoming Gou, and Yougen Xu*   

  1. School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
  • Online:2014-12-29 Published:2010-01-03


A polynomial-rooting based fourth-order cumulant algorithm is presented for direction-of-arrival (DOA) estimation of second-order fully noncircular source signals, using a uniform linear array (ULA). This algorithm inherits all merits of its spectralsearching counterpart except for the applicability to arbitrary array geometry, while reducing considerably the computation cost. Simulation results show that the proposed algorithm outperforms the previously developed closed-form second-order noncircular ESPRIT method, in terms of processing capacity and DOA estimation accuracy, especially in the presence of spatially colored noise.