Far-field DOA estimation and near-field localization for multipath signals

Date

2014-09-01

Author

Elbir, Ahmet M.
Tuncer, Temel Engin

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In direction finding and localization applications, multipath signals are important sources of error for parameter estimation. When the antenna array receives multipath reflections which are coherent with the far-field line-of-sight signal, estimating the far-and near-field components becomes an important problem. In this paper, a new method is proposed to estimate the direction-of-arrival (DOA) of the far-field source and to localize its near-field multipaths. Far-field source DOA is estimated using calibration of the antenna array. A near-to-far transformation is proposed for the estimation of the near-field source DOA angles. In order to estimate the near-field range parameters, a compressive sensing approach is presented where a dictionary with near-field sources with different ranges is employed. As a result, the proposed method estimates the far-field and near-field source DOAs as well as the range and the signal amplitudes of the near-field sources. This method is evaluated using close-to-real world data generated by a numerical electromagnetic tool, where the array and transmitter are placed in an irregular terrain and array data are generated using full 3-D propagation model. It is shown that unknown source parameters can be estimated effectively showing the potential of the proposed approach in applications involving high-frequency direction finding and indoor localization.

Subject Keywords

Of-Arrival Estimation, Esprit, Recovery, Calibration, Performance, Passive Localization

URI

https://hdl.handle.net/11511/37043

Journal

RADIO SCIENCE

DOI

https://doi.org/10.1002/2014rs005474

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

A. M. Elbir and T. E. Tuncer, “Far-field DOA estimation and near-field localization for multipath signals,” RADIO SCIENCE, pp. 765–776, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37043.