Partly-filled nonuniform linear arrays for DOA estimation in multipath signals

TUNCER T. E., Yasar T. K., Friedlander B.

32nd IEEE International Conference on Acoustics, Speech and Signal Processing, Hawaii, United States Of America, 15 - 20 April 2007, pp.1053-1055 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/icassp.2007.366420
  • City: Hawaii
  • Country: United States Of America
  • Page Numbers: pp.1053-1055
  • Keywords: direction of arrival estimation, nonuniformly spaced arrays, music, array signal processing, multipath, INTERPOLATED ARRAYS
  • Middle East Technical University Affiliated: Yes

Abstract

Partly-filled nonuniform linear arrays (PFNLA) are presented and DOA estimation problem for multipath signals is investigated. A new approach is proposed for DOA estimation in nonuniform linear arrays (NLA) based on array interpolation. A Wiener formulation is used to improve the condition number of the mapping matrix as well as the performance for noisy observations. An initial DOA estimate is obtained by using the uniform part of the PFNLA. This initial estimate is used in array interpolation and a new covariance matrix is found which improves the DOA estimation significantly. Noniterative and iterative algorithms are developed for the DOA estimation in multipath. Proposed approach overcomes some of the limitations of the conventional array interpolation. It is shown that the DOA performance is close to the CRB and the method is robust for a variety of source and DOA scenarios.