On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems

Shih-Kai Chou; Hien-Quoc Ngo; Michalis Matthaiou

On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems

Shih-Kai Chou, Hien-Quoc Ngo, Michalis Matthaiou

School of Electronics, Electrical Engineering and Computer Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

Reconfigurable intelligent surfaces (RISs) play an important role in extending the connectivity and improving the data rate of future wireless communication systems. However, the conventional (passive) RISs have their limitations and, thus, a hybrid-relay RIS (HR-RIS) architecture is proposed to reap the benefits of relaying systems with high power consumption but higher throughput, and passive RIS systems with cascaded fading effects but low complexity. In this paper, we investigate the performance of HR-RISs in a massive multiple-input multiple-output (M-MIMO) system with zero-forcing (ZF) processing, where channel state information (CSI) is unavailable. We first model the uplink/downlink channels and derive the linear minimum mean square error (LMMSE) estimate of the effective channels. We, then, derive a closed-form expression for the signal to interference and noise ratio (SINR) and spectral efficiency (SE). Finally, we provide some useful engineering insights with our asymptotic analysis and numerical results.

Original language	English
Title of host publication	Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC 2023
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665491228
ISBN (Print)	9781665491235
Publication status	Published - 12 May 2023
Event	IEEE Wireless Communications and Networking Conference 2023 - Glasgow, United Kingdom Duration: 26 Mar 2023 → 29 Mar 2023

Publication series

Name	IEEE Conference on Wireless Communications and Networking: Proceedings
ISSN (Print)	1525-3511
ISSN (Electronic)	1558-2612

Conference

Conference	IEEE Wireless Communications and Networking Conference 2023
Abbreviated title	WCNC 2023
Country/Territory	United Kingdom
City	Glasgow
Period	26/03/2023 → 29/03/2023

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On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems
© 2023 IEEE. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
Accepted author manuscript, 426 KBLicence: Unspecified

RIS-assisted future wireless communication systems
Chou, S.-K. (Author), Matthaiou, M. (Supervisor) & Ngo, H. Q. (Supervisor), Jul 2023
Student thesis: Doctoral Thesis › Doctor of Philosophy

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title = "On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems",

abstract = "Reconfigurable intelligent surfaces (RISs) play an important role in extending the connectivity and improving the data rate of future wireless communication systems. However, the conventional (passive) RISs have their limitations and, thus, a hybrid-relay RIS (HR-RIS) architecture is proposed to reap the benefits of relaying systems with high power consumption but higher throughput, and passive RIS systems with cascaded fading effects but low complexity. In this paper, we investigate the performance of HR-RISs in a massive multiple-input multiple-output (M-MIMO) system with zero-forcing (ZF) processing, where channel state information (CSI) is unavailable. We first model the uplink/downlink channels and derive the linear minimum mean square error (LMMSE) estimate of the effective channels. We, then, derive a closed-form expression for the signal to interference and noise ratio (SINR) and spectral efficiency (SE). Finally, we provide some useful engineering insights with our asymptotic analysis and numerical results.",

author = "Shih-Kai Chou and Hien-Quoc Ngo and Michalis Matthaiou",

year = "2023",

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day = "12",

language = "English",

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series = "IEEE Conference on Wireless Communications and Networking: Proceedings",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC 2023",

address = "United States",

note = "IEEE Wireless Communications and Networking Conference 2023, WCNC 2023 ; Conference date: 26-03-2023 Through 29-03-2023",

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Chou, S-K, Ngo, H-Q & Matthaiou, M 2023, On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems. in Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC 2023. IEEE Conference on Wireless Communications and Networking: Proceedings, Institute of Electrical and Electronics Engineers Inc., IEEE Wireless Communications and Networking Conference 2023, Glasgow, United Kingdom, 26/03/2023.

On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems. / Chou, Shih-Kai; Ngo, Hien-Quoc ; Matthaiou, Michalis.
Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC 2023. Institute of Electrical and Electronics Engineers Inc., 2023. (IEEE Conference on Wireless Communications and Networking: Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems

AU - Chou, Shih-Kai

AU - Ngo, Hien-Quoc

AU - Matthaiou, Michalis

PY - 2023/5/12

Y1 - 2023/5/12

N2 - Reconfigurable intelligent surfaces (RISs) play an important role in extending the connectivity and improving the data rate of future wireless communication systems. However, the conventional (passive) RISs have their limitations and, thus, a hybrid-relay RIS (HR-RIS) architecture is proposed to reap the benefits of relaying systems with high power consumption but higher throughput, and passive RIS systems with cascaded fading effects but low complexity. In this paper, we investigate the performance of HR-RISs in a massive multiple-input multiple-output (M-MIMO) system with zero-forcing (ZF) processing, where channel state information (CSI) is unavailable. We first model the uplink/downlink channels and derive the linear minimum mean square error (LMMSE) estimate of the effective channels. We, then, derive a closed-form expression for the signal to interference and noise ratio (SINR) and spectral efficiency (SE). Finally, we provide some useful engineering insights with our asymptotic analysis and numerical results.

AB - Reconfigurable intelligent surfaces (RISs) play an important role in extending the connectivity and improving the data rate of future wireless communication systems. However, the conventional (passive) RISs have their limitations and, thus, a hybrid-relay RIS (HR-RIS) architecture is proposed to reap the benefits of relaying systems with high power consumption but higher throughput, and passive RIS systems with cascaded fading effects but low complexity. In this paper, we investigate the performance of HR-RISs in a massive multiple-input multiple-output (M-MIMO) system with zero-forcing (ZF) processing, where channel state information (CSI) is unavailable. We first model the uplink/downlink channels and derive the linear minimum mean square error (LMMSE) estimate of the effective channels. We, then, derive a closed-form expression for the signal to interference and noise ratio (SINR) and spectral efficiency (SE). Finally, we provide some useful engineering insights with our asymptotic analysis and numerical results.

M3 - Conference contribution

SN - 9781665491235

T3 - IEEE Conference on Wireless Communications and Networking: Proceedings

BT - Proceedings of the IEEE Wireless Communications and Networking Conference, WCNC 2023

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - IEEE Wireless Communications and Networking Conference 2023

Y2 - 26 March 2023 through 29 March 2023

ER -

On the spectral efficiency of hybrid relay/RIS-assisted massive MIMO systems

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RIS-assisted future wireless communication systems

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