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Affiliation of Author(s):School of Computer Science and Information Engineering, Hefei University of Technology
Journal:2023 IEEE International Conference on Communications Workshops
Funded by:the National Natural Science Foundation of China under Grants 61901156, 61971176, 62171474, and 621
Key Words:Intelligent reflecting surface, condition number, line-of-sight MIMO.
Abstract:—In near-field wireless propagation environment, line of-sight (LoS) link becomes dominant, which leads to the signal energy focusing on the LoS path. In this paper, the concept of condition number is introduced to measure the spatial mul tiplexing gain available for the multiple-input multiple-output (MIMO) system. A criterion based on the minimized condition number of the MIMO channel is given out by deploying the emerging intelligent reconfigurable surfaces (IRS), which makes the energy of signals uniformly spread across the effective subchannels of the MIMO channel by adding reflective link and optimizing its phase shifters. Then, based on the improved MIMO channel, the optimal transmit and received beamforming matrices are obtained by using the singular value decomposition (SVD) approach to reach the upper bound of capacity for the IRS-aided MIMO channel. We demonstrate that deploying IRS and optimizing its phase can decrease the condition number of MIMO channel, leading to substantial multiplexing gains.
Co-author:Bichan Lei,Shiwen He,Caihong Kai,Chunguo Li
First Author:Wei Huang
Indexed by:Essay collection
Discipline:Engineering
Document Type:C
Page Number:1210-1215
Translation or Not:no
Date of Publication:2023-05-28
Included Journals:EI