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

Sun, Linlin, Qin, Yaolu, Zhuang, Zhihong, Chen, Riqing, Zhang, Yijin, Lu, Jinhui, Shu, Feng, Wang, Jiangzhou (2019) A Robust Secure Hybrid Analog and Digital Receive Beamforming Scheme for Efficient Interference Reduction. IEEE Access, 7 . pp. 22227-22234. ISSN 2169-3536. (doi:10.1109/ACCESS.2019.2899154) (KAR id:73609)

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Abstract

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.

Item Type: Article
DOI/Identification number: 10.1109/ACCESS.2019.2899154
Uncontrolled keywords: adaptive antenna arrays;array signal processing;direction-of-arrival estimation;interference suppression;radiofrequency interference;receiving antennas;digital receive;efficient interference reduction;medium-scale;antenna array;expensive cost;RF-chain circuit;robust hybrid ADB scheme;analog beamforming domain;digital beamforming domain;signal-to-interference-plus-noise ratio;NSP ADB scheme;robust secure hybrid analog and digital receive beamforming scheme;interference reduction;Interference;Array signal processing;Direction-of-arrival estimation;Radio frequency;Receivers;Measurement errors;Optimization;robust;secure;hybrid structure;interference reduction;analog-and-digital beamforming
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Jiangzhou Wang
Date Deposited: 24 Apr 2019 11:34 UTC
Last Modified: 16 Feb 2021 14:04 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/73609 (The current URI for this page, for reference purposes)
Wang, Jiangzhou: https://orcid.org/0000-0003-0881-3594
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