Direction-of-arrival estimation for coherent signals without knowledge of source number

Cheng Qian, Lei Huang, Wen Jun Zeng, Hing Cheung So

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


A new method for direction-of-arrival (DOA) estimation of coherent signals is devised in this paper. The coherency of sources is decorrelated by employing an existing algorithm in which each row of the sample covariance matrix can be used to form a full rank Toeplitz matrix. Based on the joint diagonalization structure of the full set of Toeplitz matrices constructed from the rows, a new cost function that does not require a priori information of the source number is designed. A new spatial spectrum is then obtained where the DOAs are estimated via a 1-D search. Numerical examples are provided to demonstrate effectiveness of the proposed approach.

Original languageEnglish (US)
Article number6847116
Pages (from-to)3267-3273
Number of pages7
JournalIEEE Sensors Journal
Issue number9
StatePublished - Sep 2014
Externally publishedYes


  • Direction-of-arrival (DOA) estimation
  • Toeplitz matrix
  • coherent signals
  • joint diagonalization


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