Detecting Abrupt Channel Changes for IRS-Assisted MIMO Communication

Runnan Liu; Yin Xu; Yongpeng Wu; Dazhi He; Wenjun Zhang; Chang Wen Chen

doi:10.1109/LWC.2023.3316700

Detecting Abrupt Channel Changes for IRS-Assisted MIMO Communication

Runnan Liu, Yin Xu, Yongpeng Wu, Dazhi He, Wenjun Zhang, Chang Wen Chen

Research output: Journal article publication › Journal article › Academic research › peer-review

Abstract

This letter aims to detect abrupt changes in the base station to intelligent reflecting surface (BS-IRS) channel for IRS-assisted communications. Specifically, we first propose a centralized channel change detector, where the BS enables a fusion change detection based on the log-likelihood ratios (LLRs) obtained from all the user equipments. Next, to curtail the feedback overhead, we propose a decentralized channel change detector, where each UE independently detects channel changes and conveys a 1-bit outcome signal to the BS enabling a change detection. Numerical results validate that the proposed change detectors can promptly detect the change with low false alarm rate.

Original language	English
Pages (from-to)	29-33
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	13
Issue number	1
DOIs	https://doi.org/10.1109/LWC.2023.3316700
Publication status	Published - 1 Jan 2024

Keywords

change detection
intelligent reflecting surface (IRS)
Multiple-input multiple-output (MIMO)

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

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10.1109/LWC.2023.3316700

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title = "Detecting Abrupt Channel Changes for IRS-Assisted MIMO Communication",

abstract = "This letter aims to detect abrupt changes in the base station to intelligent reflecting surface (BS-IRS) channel for IRS-assisted communications. Specifically, we first propose a centralized channel change detector, where the BS enables a fusion change detection based on the log-likelihood ratios (LLRs) obtained from all the user equipments. Next, to curtail the feedback overhead, we propose a decentralized channel change detector, where each UE independently detects channel changes and conveys a 1-bit outcome signal to the BS enabling a change detection. Numerical results validate that the proposed change detectors can promptly detect the change with low false alarm rate.",

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AU - Zhang, Wenjun

AU - Chen, Chang Wen

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AB - This letter aims to detect abrupt changes in the base station to intelligent reflecting surface (BS-IRS) channel for IRS-assisted communications. Specifically, we first propose a centralized channel change detector, where the BS enables a fusion change detection based on the log-likelihood ratios (LLRs) obtained from all the user equipments. Next, to curtail the feedback overhead, we propose a decentralized channel change detector, where each UE independently detects channel changes and conveys a 1-bit outcome signal to the BS enabling a change detection. Numerical results validate that the proposed change detectors can promptly detect the change with low false alarm rate.

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Detecting Abrupt Channel Changes for IRS-Assisted MIMO Communication

Abstract

Keywords

ASJC Scopus subject areas

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