Robust Transmission Design for RIS-Aided Wireless Communication With Both Imperfect CSI and Transceiver Hardware Impairments

Zheng, Hongxia; Pan, Cunhua; Zhang, Chiya; Li, Xingquan; He, Chunlong; Yang, Yatao; Dai, Ming

doi:10.1109/jiot.2022.3218549

Cited by 8 publications

(3 citation statements)

References 31 publications

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“…13a depicts the effect of imperfect CSI and SIC on the maximum throughput and MMR results with ϵ and σ 2 e denoting the imperfect SIC and CSI coefficients, respectively. The imperfection models and related values were derived from the relevant literature [55]- [57]. As illustrated in the figure, imperfect SIC has a greater effect on the system's performance compared to imperfect CSI.…”

Section: F the Impact Of Csi Sic And Phase Shift Imperfectionsmentioning

confidence: 99%

Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Makin,

Arzykulov,

Celik

et al. 2024

IEEE Trans. Wireless Commun.

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This study delves into the capabilities of reconfigurable intelligent surfaces (RISs) in enhancing bidirectional nonorthogonal multiple access (NOMA) networks. The proposed approach partitions RIS to optimize the channel conditions for NOMA users, improving NOMA gain and eliminating the requirement for uplink (UL) power control. The proposed approach is rigorously evaluated under four practical operational regimes; 1) Quality-of-Service (QoS) sufficient regime, 2) RIS and power efficient regime, 3) max-min fair regime, and 4) maximum throughput regime, each subject to both UL and downlink (DL) QoS constraints. By leveraging decoupled nature of RIS portions and base station (BS) transmit power, closed-form solutions are derived to show how optimal RIS partitioning can meet UL-QoS requirements while optimal BS power control can ensure DL-QoS compliance. Analytical findings are validated by simulations, highlighting the significant benefits that RISs can bring to the NOMA networks in the aforementioned operational scenarios.

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Section: F the Impact Of Csi Sic And Phase Shift Imperfectionsmentioning

confidence: 99%

Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Makin,

Arzykulov,

Celik

et al. 2024

IEEE Trans. Wireless Commun.

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“…While the ongoing development of RIS technology focuses on enabling high-capacity [20], energy-efficient [20], [21], and secure [22] wireless networks, a gap exists in studies addressing the reliability of communication networks during their physical operation. Furthermore, a few studies that do focus on hardware impairment in RIS-aided networks consider residual impairment factors such as phase imperfections and transceiver noise [23], [24] only. Other studies, such as [25] and [26] focus on the analysis of enterprise data-center networks and virtual network functions, respectively.…”

Section: Introductionmentioning

confidence: 99%

Extending RIS Life Span for Reliable Communication Under Hardware Ageing Effects

Mondal,

Ghosh,

Singh

et al. 2024

IEEE Open J. Commun. Soc.

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In this paper, we address the critical aspect of hardware ageing effects in reconfigurable intelligent surfaces (RISs), whereby the problem of extending the RIS's life cycle under the impact of non-residual stochastic hardware impairment is considered. Through the replication of the RIS hardware and diverse wireless environments within a statistical simulation environment, we formulate an electronic maintenance framework (EMF) for RIS, where we incorporate non-residual impairments through stochastic modelling and determine the electronic reliability of the system. Accordingly, we derive optimal analytical solutions within the EMF to determine whether systematic maintenance of the RIS hardware should be done immediately or postponed in order to extend the expected life cycle of the RIS system. Furthermore, for the scenario with imperfect maintenance of the RIS-aided system, a reliable communication framework (RCF) is also introduced with residual impairments to assess the error probability of the RIS-aided communication. The RCF is established by deriving the distribution of the received signal-to-interference-plus-noise ratio in the presence of residual hardware impairment arising due to imperfect maintenance of the RIS system.Extensive numerical examples are provided to elucidate the derived solutions and illustrate the reliability performance of the proposed framework under hardware impairments.INDEX TERMS Industrial informatics and communication, electronic maintenance, industrial internet-ofthings, reliability, reconfigurable intelligent surfaces, hardware impairment.

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“…Thus, the vulnerability of wireless communications to harsh wireless propagation environments, including dead zones and large obstacles, is a main challenge. It is very important to ensure wireless transmission is robust against harsh environments, blockages, and large obstacles to prevent signal losses, call drops, and transmission delays [9].…”

Section: Introductionmentioning

confidence: 99%

6G-Powered Efficient Resource Control through IRS-UE Association

Alqahtani,

Taneja,

Alqahtani

et al. 2023

Sensors

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The widespread popularity of live streaming, cloud gaming, mobile video streaming, and many real-time applications relies on high-speed data to ensure low latency and seamless user experience. This large high-speed data demand has led to the development of next-generation or sixth-generation (6G) communication technology. It aims to offer high-speed communication support to multiple applications and interactive services simultaneously. But the vulnerability of node communication to the changing propagation environment often leads to call drops, data loss, and high latency. This paper presents a 6G-enabled wireless network that makes use of multiple intelligent reflecting surfaces (IRSs). The distributed IRSs enhance the robustness of transmission but the increased overhead owing to multiple IRSs is the main challenge. To overcome this, efficient resource control is introduced, which associates sets of IRSs to user equipment (UE). An algorithm, namely IUABP (IRS-UE association based on pilots), is proposed; it offers selective resource control. Furthermore, the performance of the distributed IRS system is evaluated based on the achievable sum rate for different IRS numbers, reflecting elements, and transmit powers. We observed that the proposed association scheme offers an improvement of 30% in the achieved sum rate using N = 50 and R = 5 at a transmit power of 12 dBm. We also discuss the comparison with two other association schemes, namely, distance-based association and random association.

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Robust Transmission Design for RIS-Aided Wireless Communication With Both Imperfect CSI and Transceiver Hardware Impairments

Cited by 8 publications

References 31 publications

Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Optimal RIS Partitioning and Power Control for Bidirectional NOMA Networks

Extending RIS Life Span for Reliable Communication Under Hardware Ageing Effects

6G-Powered Efficient Resource Control through IRS-UE Association

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