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DIRECTION FINDING AND LOCALIZATION FOR FAR-FIELD SOURCES WITH NEAR-FIELD MULTIPATH REFLECTIONS
Date
2015-08-12
Author
Elbir, Ahmet M.
Tuncer, Temel Engin
Metadata
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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
Conference Name
IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE)
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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In source localization applications, coherency among the signals is an important source of error for parameter estimation. In this paper, a method is proposed to solve the localization problem where there are coherently mixed arbitrary number of far- and near-field sources. In order to estimate the direction-of-arrival (DOA) and the range parameters, compressed sensing (CS) approach is presented where a dictionary matrix is constructed with far- and near-field steering vectors. A sparse vector including the...
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A. M. Elbir and T. E. Tuncer, “DIRECTION FINDING AND LOCALIZATION FOR FAR-FIELD SOURCES WITH NEAR-FIELD MULTIPATH REFLECTIONS,” presented at the IEEE Signal Processing and Signal Processing Education Workshop (SP/SPE), Salt Lake, UT, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55177.
