IRS-aided MIMO Systems over Double-scattering Channels : Impact of Channel Rank Deficiency

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review

4 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Title of host publication2022 IEEE Wireless Communications and Networking Conference (WCNC)
PublisherInstitute of Electrical and Electronics Engineers, Inc.
Pages2076-2081
ISBN (electronic)9781665442664
ISBN (print)978-1-6654-4267-1
Publication statusPublished - 2022
Externally publishedYes

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511
ISSN (electronic)1558-2612

Conference

Title2022 IEEE Wireless Communications and Networking Conference (WCNC 2022)
LocationHilton Austin
PlaceUnited States
CityAustin
Period10 - 13 April 2022

Abstract

Intelligent reflecting surfaces (IRSs) are promising enablers for next-generation wireless communications due to their reconfigurability and high energy efficiency in improving poor propagation condition of channels, e.g., limited scattering environment. However, most existing works assumed full-rank channels requiring rich scatters, which may not be available in practice. To analyze the impact of rank-deficient channels and mitigate the ensued performance loss, we consider a large-scale IRS-aided MIMO system with statistical channel state information (CSI), where the double-scattering channel is adopted to model rank deficiency. By leveraging random matrix theory (RMT), we first derive a deterministic approximation (DA) of the ergodic rate with low computational complexity and prove the existence and uniqueness of the DA parameters. Then, we propose an alternating optimization algorithm for maximizing the DA with respect to phase shifts and signal covariance matrices. Numerical results will show that the DA is tight and our proposed method can effectively mitigate the performance loss induced by channel rank deficiency.

Citation Format(s)

IRS-aided MIMO Systems over Double-scattering Channels: Impact of Channel Rank Deficiency. / Zhang, Xin; Yu, Xianghao; Song, S.H. et al.
2022 IEEE Wireless Communications and Networking Conference (WCNC). Institute of Electrical and Electronics Engineers, Inc., 2022. p. 2076-2081 (IEEE Wireless Communications and Networking Conference, WCNC).

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-review