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Byun, Gangil
Antenna Technology Lab.
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A Novel Approach to Array Manifold Calibration Using Single-Direction Information for Accurate Direction-of-Arrival Estimation

Author(s)
Byun, GangilChoo, Hosung
Issued Date
2017-09
DOI
10.1109/TAP.2017.2731374
URI
https://scholarworks.unist.ac.kr/handle/201301/23297
Fulltext
http://ieeexplore.ieee.org/document/7990229/
Citation
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, v.65, no.9, pp.4952 - 4957
Abstract
A method of array manifold calibration using one steering vector measured in a single direction is proposed. The phase information of the measured steering vector is used to derive a novel calibration matrix that is proposed to compensate for the relative phase distortion (RPD) at each antenna port. We also present a metric function defined as a standard deviation of the RPD to determine the optimum calibration angle, which provides intuition for the cause of the accuracy degradation in the direction-of-arrival estimation. To verify the feasibility, a seven-element circular array with identical microstrip patch antennas is fabricated for calibrating its array manifold using a single steering vector measured in a full anechoic chamber. The calibrated array manifold is then used to estimate the direction of arrival, and its accuracy is compared to the calibrated result obtained from the traditional least-squares method. The results demonstrate that the estimation error can be improved by 54.9 degrees compared to the traditional least-squares method, when the number of measured steering vectors is extremely limited.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
ISSN
0018-926X
Keyword (Author)
Adaptive antenna arrayantenna arrayarray manifold calibrationdirection finding array
Keyword
MUTUAL COUPLING COMPENSATIONSMART ANTENNA APPLICATIONSDOA ESTIMATIONALGORITHMSPLATFORM

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