Localization of coherent signals without source number knowledge in unknown spatially correlated Gaussian noise

Cheng Qian, Lei Huang, Yuhang Xiao, H. C. So

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)170-178
Number of pages9
JournalSignal Processing
Volume111
DOIs
StatePublished - Jun 2015

Bibliographical note

Funding 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 .

Publisher Copyright:
© 2015 Published by Elsevier B.V.

Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.

Keywords

  • Coherent signals
  • Direction-of-arrival (DOA) estimation
  • Fourth-order cumulant
  • Joint diagonalization
  • Toeplitz matrix

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