Stochastic Learning-Based Robust Beamforming Design for RIS-Aided Millimeter-Wave Systems in the Presence of Random Blockages

Zhou, Gui; Pan, Cunhua; Ren, Hong; Wang, Kezhi; Elkashlan, Maged; Renzo, Marco Di

doi:10.1109/tvt.2021.3049257

Cited by 75 publications

(63 citation statements)

References 20 publications

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“…One of the main applications of RIS is to remove blind spots and provide the UEs with alternative links when the direct UE-BS link experiences poor channel quality due to, e.g., blockage [8], [9]. This is specially of interest in mmw communication, as the mmw signal suffers from high penetration loss/low diffraction from objects.…”

Section: Internet-of-vehicles Using Rismentioning

confidence: 99%

Dynamic Blockage Pre-Avoidance using Reconfigurable Intelligent Surfaces

Guo¹,

Makki²,

Åström³

et al. 2022

Preprint

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Internet-of-vehicle (IoV) is a general concept referring to, e.g., autonomous drive based vehicle-to-everything (V2X) communications or moving relays. Here, high rate and reliability demands call for advanced multi-antenna techniques and millimeter-wave (mmw) based communications. However, the sensitivity of the mmw signals to blockage may limit the system performance, especially in highways/rural areas with limited building reflectors/base station deployments and highspeed devices. To avoid the blockage, various techniques have been proposed among which reconfigurable intelligent surface (RIS) is a candidate. RIS, however, has been mainly of interest in stationary/low mobility scenarios, due to the associated channel state information acquisition and beam management overhead as well as imperfect reflection. In this article, we study the potentials and challenges of RIS-assisted dynamic blockage avoidance in IoV networks. Particularly, by designing region-based RIS pre-selection as well as blockage prediction schemes, we show that RIS-assisted communication has the potential to boost the performance of IoV networks. However, there are still issues to be solved before RIS can be practically deployed in IoV networks.

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Section: Internet-of-vehicles Using Rismentioning

confidence: 99%

Dynamic Blockage Pre-Avoidance using Reconfigurable Intelligent Surfaces

Guo¹,

Makki²,

Åström³

et al. 2022

Preprint

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“…In [68], the authors address a multiuser MISO IRS-assisted mmWave communication system. The motivation is to enhance the network reliability and connectivity in the presence of random blockages in mmWave, which usually implies NLOS.…”

Section: Single-user Siso Scenariomentioning

confidence: 99%

Intelligent Reflective Surfaces for Wireless Networks: An Overview of Applications, Approached Issues, and Open Problems

et al. 2021

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An intelligent reflective surface (IRS) is a novel and revolutionizing communication technology destined to enable the control of the radio environment. An IRS is a real-time controllable reflectarray with a massive number of low-cost passive elements which introduce a phase shift to the incoming signals from the sources before the propagation towards the destination. This technology introduces the notion of a smart propagation environment with the aim of improving the system performance. In this paper, we provide a comprehensive literature overview on IRS technology, including its basic concepts and reconfiguration, as well as its design aspects and applications for wireless communication systems. We also study the performance metrics and the setups considered in recent publications related to IRS and provide suggestions of future research lines based on still unexplored use cases in the state-of-the-art.

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“…Content may change prior to final publication. Derivation of exact end-to-end SNR expressions for the RISaided system and AF relay system [68] Provide a two-stage positioning with dual RIS in mmWave MIMO systems [69] Introduce the cross-entropy method to maximize the sum-rate performance of RIS-aided indoor THz transmission [70] Discuss the coverage of an RIS-assisted large-scale mmWave cellular network using stochastic geometry [71] Present a robust technique for mitigating quantization errors in low resolution mmWave RISs under plane-wave illumination using random phase delays [72] Investigate an IRS-aided multi-user THz MIMO system with OFDMA, where the sparse radio frequency chain antenna structure is adopted for reducing the power consumption [73] Formulate the closed-form expression of uplink achievable rate expression of RIS-aided mmWave systems [74] Study the enhancement of network reliability and connectivity of mmWave RISs-aided communication system in the presence of random blockages [75] Discuss Geometric Mean Decomposition (GMD)-based beamforming for RIS-aided wideband hybrid mmWave MIMO systems [76] Study the ranging performance of RIS-aided mmWave systems in the presence of blockages [77] Present a design of a practical beam alignment and channel parameter estimation method for RIS-aided mmWave MIMO networks via atomic norm minimization [78] Discuss a holographic version of an RIS and its use in THz mMIMO systems [79] Present the optimal RIS placement in mmWave networks reduction, channel acquisition, beamforming design, and user localization strategies [67].…”

Section: ) the Benefits Of Ris To Beyond 6 Ghz Communicationsmentioning

confidence: 99%

“…In the presence of random blockages, the work in [74] studied the enhancement of network reliability and connectivity of multi-user mmWave RISs-aided communication system. The authors formulated a sum-outage probability minimization problem subject to total transmit power constraint and unit modulus constraint.…”

Section: ) the Benefits Of Ris To Beyond 6 Ghz Communicationsmentioning

confidence: 99%

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

Munochiveyi

Pogaku

Do³

et al. 2021

IEEE Access

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Reconfigurable intelligent surface (RIS)-aided communication is considered as an exciting research topic in academic and industrial communities since it provides an emerging affordable solution to achieve high quality and secure next-generation wireless systems. Especially, the deployment of RIS in multi-user wireless networks promises to reduce system hardware costs, signal processing complexity, as well as energy consumption due to small size, lightweight and ability to actively shape the wireless propagation environment. Further, by realizing a cost-effective radio environment, RIS-aided communication can be implemented to be an appealing technology for future integration with other emerging wireless applications and communication systems. Despite the positive appeal, RISs face new challenges that hinder integrating efficiently into wireless networks, such as network secrecy performance and system sum-rates, as well as achieving efficient deployment design in highly dynamic and time-varying wireless environments. To this end, we overview recent state-of-the-art techniques to address the above issues faced in the integration of RISs with various emerging multi-user communication techniques, such as Unmanned Aerial Vehicles (UAVs), Non-Orthogonal Multiple Access (NOMA), Millimeter Wave (mmWave) and Terahertz (THz) communications, Physical Layer Security (PLS), massive antennas, and Simultaneous Wireless Information and Power Transfer (SWIPT). Finally, we highlight promising future research directions of RIS-aided communication in Cell-Free Massive Multiple-Input-Multiple-Output (MIMO) systems, Rate-Splitting Multiple Access (RSMA), Light Fidelity (LiFi), and Cognitive Radio (CR) systems.

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Stochastic Learning-Based Robust Beamforming Design for RIS-Aided Millimeter-Wave Systems in the Presence of Random Blockages

Cited by 75 publications

References 20 publications

Dynamic Blockage Pre-Avoidance using Reconfigurable Intelligent Surfaces

Dynamic Blockage Pre-Avoidance using Reconfigurable Intelligent Surfaces

Intelligent Reflective Surfaces for Wireless Networks: An Overview of Applications, Approached Issues, and Open Problems

Reconfigurable Intelligent Surface Aided Multi-User Communications: State-of-the-Art Techniques and Open Issues

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