Intelligent reflecting surface assisted MIMO communication system: A review

Sur, Samarendra Nath; Bera, Rabindranath

doi:10.1016/j.phycom.2021.101386

Cited by 33 publications

(18 citation statements)

References 108 publications

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“…Intelligent reflecting surface (IRS), a metasurface equipped with massive reflecting elements [4], is a promising technology for enabling URLLC [1]. It is able to reconfigure the wireless environment and turn the random wireless channels into partially deterministic ones by beamforming design [5][6][7].…”

Section: A Related Workmentioning

confidence: 99%

Robust Beamforming Design for IRS-Aided URLLC in D2D Networks

Cheng

Shen

Chen

et al. 2022

IEEE Trans. Commun.

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Intelligent reflecting surface (IRS) and device-todevice (D2D) communication are two promising technologies for improving transmission reliability between transceivers in communication systems. In this paper, we consider the design of reliable communication between the access point (AP) and actuators for a downlink multiuser multiple-input single-output (MISO) system in the industrial IoT (IIoT) scenario. We propose a two-stage protocol combining IRS with D2D communication so that all actuators can successfully receive the message from AP within a given delay. The superiority of the protocol is that the communication reliability between AP and actuators is doubly augmented by the IRS-aided first-stage transmission and the second-stage D2D transmission. A joint optimization problem of active and passive beamforming is formulated, which aims to maximize the number of actuators with successful decoding. We study the joint beamforming problem for cases where the channel state information (CSI) is perfect and imperfect. For each case, we develop efficient algorithms that include convergence and complexity analysis. Simulation results demonstrate the necessity and role of IRS with a well-optimized reflection matrix, and the D2D network in promoting reliable communication. Moreover, the proposed protocol can enable reliable communication even in the presence of stringent latency requirements and CSI estimation errors.Index Terms-D2D communication, industrial Internet of things (IIoT), intelligent reflecting surface (IRS), robust beamforming, URLLC I. INTRODUCTIONWith the development of the Internet of things (IoT) and the fifth-generation (5G) and beyond wireless networks, the Manuscript

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Section: A Related Workmentioning

confidence: 99%

Robust Beamforming Design for IRS-Aided URLLC in D2D Networks

Cheng

Shen

Chen

et al. 2022

IEEE Trans. Commun.

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“…Unlike other technologies as active relays, RISs do not require power-hungry RF chains and power amplifiers, making them low-cost and energy efficient solutions for coverage extensions. RIS-aided massive MIMO communications [33], [34] can therefore be used to extend the coverage range in rural areas, as shown in Fig. 3.…”

Section: B Reconfigurable Intelligent Surfacesmentioning

confidence: 99%

Enhancement of Rural Connectivity by Recycling TV Towers with Massive MIMO Techniques

Falou¹,

Alouini²

2022

Preprint

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Nowadays, the digital divide is one of the major issues facing the global community. Around 3 billion people worldwide are still not-connected or underconnected. In this article, we investigate the use of TV towers with multi user (MU) massive multiple input multiple output (mMIMO) techniques to offer connectivity in rural areas. Specifically, the coverage range is assessed for a MU mMIMO base station (BS) mounted on a high tower as a TV tower, and compared with a legacy mMIMO BS. The obtained results show that one high tower BS can cover an area at least 25 times larger than the area covered by a legacy BS. This is of high interest as recycling TV towers can enhance the rural connectivity with low expenditures. We apply the proposed solution to a realistic case study in an Ethiopian rural area, based on population densities and locations of current BS and TV towers. Our study shows that a high number of people can be covered by existing TV towers. Additional possible solutions to enhance rural connectivity are discussed in the last section.

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“…The intelligent reflecting surface (IRS) [22,23] is a tunable metasurface composed of many low-cost passive reflective elements, which can manipulate the wavelength, polarization, and phase of the incident wave [24,25]. In the RF-based vehicular networks, the metasurfaces can revise the Snell's law that redirecting the radio waves in the desired direction, which solves the problem that the communication is obstructed by strong obstacles and extends coverage in the highly dynamic vehicular environment [26], realizing keyless, secure transmission [27].…”

Section: Introductionmentioning

confidence: 99%

An Optimal Scheme for the Number of Mirrors in Vehicular Visible Light Communication via Mirror Array-Based Intelligent Reflecting Surfaces

et al. 2022

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The optimization problem of the number of mirrors under energy efficiency (EE) maximization for vehicular visible light communication (VVLC) via mirror array-based intelligent reflecting surface (IRS) is investigated. Under considering that the formulated optimization problem is subject to the real and non-negative of the transmitted signal, the maximum power consumption satisfied luminous ability and eye safety, the minimum achievable rate, and the required bit error ratio (BER), EE is proved to be a unimodal function of the number of mirrors. Then, the binary search-conditional iteration (BSCI) algorithm is proposed for quickly finding the optimal number of mirrors with maximum EE. Numerical results demonstrate that fewer mirrors can obtain the maximum EE, and the computational complexity of the BSCI algorithm is reduced by 105 orders of magnitude, compared with the Bubble Sort method.

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Intelligent reflecting surface assisted MIMO communication system: A review

Cited by 33 publications

References 108 publications

Robust Beamforming Design for IRS-Aided URLLC in D2D Networks

Robust Beamforming Design for IRS-Aided URLLC in D2D Networks

Enhancement of Rural Connectivity by Recycling TV Towers with Massive MIMO Techniques

An Optimal Scheme for the Number of Mirrors in Vehicular Visible Light Communication via Mirror Array-Based Intelligent Reflecting Surfaces

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