DIRECTION FINDING AND LOCALIZATION FOR FAR-FIELD SOURCES WITH NEAR-FIELD MULTIPATH REFLECTIONS


Elbir A. M. , TUNCER T. E.

IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE), Utah, United States Of America, 9 - 12 August 2015, pp.130-135 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Utah
  • Country: United States Of America
  • Page Numbers: pp.130-135
  • Keywords: Direction-of-arrival estimation, Far-field, Near-field, Array calibration, Localization

Abstract

Multipath signals are main source of error for parameter estimation in direction finding applications. In this paper, a new method is proposed for the estimation of direction-of-arrivals (DOA) of a far-field source and localization of its near-field multipath reflections in two steps. Firstly, far-field source DOA is estimated using a calibration technique. In the second step, a near-to-far field transformation is presented in order to eliminate the far-field components of the array data and obtain only near-field signal components to estimate the near-field multipath signals. The proposed method uses uniform circular array in order to give 2D DOA estimation for far-field signal and virtual uniform linear array structure is used in order to estimate locations of the near-field multipaths. The proposed method is evaluated using both ideal and close-to-real world data sets. It is shown that far and near-field source parameters are effectively estimated.