A Robust Secure Hybrid Analog and Digital Receive Beamforming Scheme for Efficient Interference Reduction

Linlin Sun; Yaolu Qin; Zhihong Zhuang; Riqing Chen; Yijin Zhang; Jinhui Lu; Feng Shu; Jiangzhou Wang

doi:10.1109/ACCESS.2019.2899154

IEEE Access (Jan 2019)

A Robust Secure Hybrid Analog and Digital Receive Beamforming Scheme for Efficient Interference Reduction

Linlin Sun,
Yaolu Qin,
Zhihong Zhuang,
Riqing Chen,
Yijin Zhang,
Jinhui Lu,
Feng Shu,
Jiangzhou Wang

Affiliations

Linlin Sun: School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Yaolu Qin: School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Zhihong Zhuang: School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Riqing Chen: College of Computer and Information Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
Yijin Zhang: ORCiD; School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Jinhui Lu: School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Feng Shu: ORCiD; School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China
Jiangzhou Wang: School of Engineering and Digital Arts, University of Kent, Canterbury, U.K.

DOI: https://doi.org/10.1109/ACCESS.2019.2899154
Journal volume & issue: Vol. 7
pp. 22227 – 22234

Abstract

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Medium-scale or large-scale receive antenna array with digital beamforming can be employed at receiver to make a significant interference reduction but leads to expensive cost and high complexity of the RF-chain circuit. To deal with this issue, classic analog-and-digital beamforming (ADB) structure was proposed in the literature for greatly reducing the number of RF-chains. Based on the ADB structure, in this paper, we propose a robust hybrid ADB scheme to resist directions of arrival (DOAs) estimation errors. The key idea of our scheme is to employ null space projection (NSP) in the analog beamforming domain and diagonal loading (DL) method in digital beamforming domain. The simulation results show that the proposed scheme performs more robustly, and moreover, it has a significant improvement on the receive signal-to-interference-plus-noise ratio compared to NSP ADB scheme and DL method.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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