A Novel Approach to Array Manifold Calibration Using Single-Direction Information for Accurate Direction-of-Arrival Estimation

被引:3
作者
Byun, Gangil [1 ]
Choo, Hosung [2 ]
机构
[1] Hongik Univ, Metamat Elect Device Res Ctr, Seoul 121791, South Korea
[2] Hongik Univ, Sch Elect & Elect Engn, Seoul 121791, South Korea
基金
新加坡国家研究基金会;
关键词
Adaptive antenna array; antenna array; array manifold calibration; direction finding array; MUTUAL COUPLING COMPENSATION; SMART ANTENNA APPLICATIONS; DOA ESTIMATION; ALGORITHMS; PLATFORM;
D O I
10.1109/TAP.2017.2731374
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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.
引用
收藏
页码:4952 / 4957
页数:6
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