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

Date

2015-08-12

Author

Elbir, Ahmet M.
Tuncer, Temel Engin

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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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.

Subject Keywords

Direction-of-arrival estimation, Far-field, Near-field, Array calibration, Localization

URI

https://hdl.handle.net/11511/55177

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar