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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.
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Source :
IEEE ACCESS
ISSN: 2169-3536
Year: 2019
Volume: 7
Page: 22227-22234
3 . 7 4 5
JCR@2019
3 . 4 0 0
JCR@2023
ESI Discipline: ENGINEERING;
ESI HC Threshold:150
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 16
SCOPUS Cited Count: 17
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: