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Affiliation of Author(s):School of Computer Science and Information Engineering, Hefei University of Technology
Journal:2023 IEEE Global Communications Conference
Funded by:National Natural Science Foundation of China with Grants 62371180, 61971176 and 62171474，National Ke
Key Words:Training, Closed-form solutions, Spectral efficiency, Simulation, UHF antennas, Transceivers, Antenna arrays
Abstract:Extremely large-scale multiple-input multiple output (XL-MIMO) communication system with extremely large-scale antenna arrays can achieve ultra-high spectral efficiency. However, the conventional far-field beam codebooks may be mismatched with the near-field spherical-wavefront channel caused by large array aperture, which results in severe performance loss. To address this problem, we develop a criterion of codebook design to maximize the worst-case beam gain within the beam coverage. Then, a closed-form expression of the near-field full dimensional (FD) codebook with non-orthogonal structure is derived, which can realize the spatial oversampling regardless of the number of antennas at the transceiver. Simulation results show that our proposed non-orthogonal codebook can potentially improve the accuracy of near-field beam training, compared with existing codebooks
Co-author:Cuiling Li,Yong Zeng,Caihong Kai,Shiwen He
First Author:Wei Huang
Indexed by:Essay collection
Discipline:Engineering
Document Type:C
Page Number:4902-4908
Translation or Not:no
Date of Publication:2023-12-04
Included Journals:EI