Related references
Note: Only part of the references are listed.
Article
Computer Science, Information Systems
Ying He et al.
Summary: WiFi-based imaging achieves pervasive sensing by protecting privacy and reducing cost. However, most existing methods either require specialized hardware modification or suffer from poor imaging performance due to the limited spatial resolution of off-the-shelf WiFi devices. This article proposes an RIS-aided WiFi imaging framework to achieve high-resolution imaging with off-the-shelf WiFi devices. The framework includes a beamforming method to separate signals from different spatial locations with the aid of the RIS, and an optimization-based super-resolution imaging algorithm that considers the effect of finite phase quantization in RIS. Simulation results show that the framework achieves a median RMSE of 0.03 and median SSIM of 0.52.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Telecommunications
Zhendong Mao et al.
Summary: This paper proposes a deep learning-based approach to improve channel estimation in intelligent reflecting surfaces (IRS) assisted massive multiple-input multiple-output systems. By revealing the sparse structure in the angular domain and using compressive sensing techniques, more accurate channel state information can be obtained. In addition, a simplified network structure is introduced to reduce computational complexity. Simulation results demonstrate that the proposed approach achieves better estimation performance and requires lower pilot overhead compared to state-of-the-art methods.
IEEE COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Zhen Chen et al.
Summary: The emerging intelligent reflecting surface (IRS) is a promising technology that can significantly improve system capacity. Accurate channel estimation is a critical challenge, especially for indoor scenarios. In this study, we propose an offset learning (OL)-based neural network for channel estimation, which shows higher accuracy and lower complexity compared to benchmark schemes.
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Chang Liu et al.
Summary: Channel estimation is a critical task in IRS-MUC systems, and this paper proposes a deep residual learning approach to address the challenges of cascaded channel with a sophisticated statistical distribution. By modeling the channel estimation as a denoising problem, a convolutional neural network based on deep residual learning is designed to recover the channel coefficients. The proposed method achieves similar performance as the optimal MMSE estimator, but without the requirement of prior probability density function of channel.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Yuxing Lin et al.
Summary: In this paper, we investigate the channel estimation problem and channel-based wireless applications in multiple-input multiple-output orthogonal frequency division multiplexing systems assisted by intelligent reconfigurable surfaces (IRSs). We propose a novel twin-IRS structure and utilize different IRS training coefficient designs to accurately recover channel parameters and achieve user localization.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Computer Science, Hardware & Architecture
Roman Fara et al.
Summary: With the development of next generation mobile networks, new research challenges have emerged. Reconfigurable intelligent surface (RIS) technology and ambient backscatter communications (AmBC) have been proposed to address these challenges. RIS improves signal quality by controlling the propagation of electromagnetic waves, while AmBC enables low-power communications by reusing existing waves. This article presents a prototype of an RIS that can continuously control phase shifts and optimizes an RIS-assisted AmBC system, demonstrating significant performance improvements.
IEEE WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Tian Lin et al.
Summary: This paper investigates channel estimation for IRS-assisted mm-wave MIMO wireless systems. By leveraging the sparsity of mm-wave channels in the angular domain, the problem is formulated as a regularized optimization problem with fixed-rank constraints. An efficient algorithm is proposed to tackle the non-convexity of the problem. Additionally, a compressive sensing-based channel estimation approach is proposed to further reduce the computational complexity of the algorithm.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Davide Dardari et al.
Summary: This paper explores the use of a reconfigurable intelligent surface to enable mobile user localization under non-line-of-sight channel conditions, especially in the near-field propagation regime. It proposes practical algorithms and methods for designing the RIS to achieve robust localization accuracy, and evaluates performance trade-offs in various scenarios.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Rui Chen et al.
Summary: This article introduces the potential of reconfigurable intelligent surfaces (RIS) in the sixth-generation wireless communication system for both communication and positioning. It explains the working principle and characteristics of RIS, reviews and classifies existing RIS positioning research, and proposes future research directions.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Computer Science, Information Systems
Arash Nasri et al.
Summary: In this study, the positioning in wireless networks in the presence of IRSs is examined. It is found that IRSs can be utilized to localize the user in situations where there are not enough transmitters. The results indicate that the desired accuracy in localization can be achieved by controlling the number of IRSs elements and selecting their locations appropriately for a given region.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Computer Science, Information Systems
Hong Niu et al.
Summary: In order to improve physical-layer security, reconfigurable intelligent surface (RIS) has been proposed to assist artificial noise (AN) in MISO systems. By jointly designing phase shifts (PSs) and beamforming based on the oblique manifold (OM) algorithm, the trade-off between transmission reliability and security is achieved. The novel alternating direction (AD) algorithm is introduced to lower computational complexity and exhibits faster and more stable convergence compared to the OM algorithm.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Wankai Tang et al.
Summary: Reconfigurable intelligent surfaces (RISs) act as an interface between wireless propagation environments and information science. This paper presents a refined path loss model for RISs, simplifying it while maintaining accuracy. Experimental results confirm the effectiveness of the proposed model.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Son Dinh-Van et al.
Summary: This article presents a general system framework that lays the foundation for reconfigurable intelligent surface-enhanced broadcast communications in Industrial Internet of Things. Through analysis and the introduction of two algorithms, the framework achieves satisfactory performance and low computational latency.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Review
Computer Science, Information Systems
Sukhpal Singh Gill et al.
Summary: Autonomic computing investigates how systems can achieve specified control outcomes on their own. Integrating AI/ML to improve resource autonomy and performance remains a fundamental challenge. Experts in the field discuss current research, potential future directions, and challenges and opportunities for leveraging AI and ML in emerging computing paradigms.
INTERNET OF THINGS
(2022)
Article
Telecommunications
Teng Ma et al.
Summary: This letter explores the application of reconfigurable intelligent surface (RIS) combined with ultra-wideband (UWB) technology for indoor positioning, and quantifies the accuracy of the positioning scheme developed. The study shows that RIS has the potential to achieve accurate positioning with a single access point, and provides higher accuracy compared to traditional active positioning methods.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Wankai Tang et al.
Summary: This article develops free-space path loss models for RIS-assisted wireless communications in different scenarios by studying the physics and electromagnetic nature of RISs, validated through extensive simulation results and experimental measurements. The models reveal the relationships between the path loss and various factors, paving the way for further theoretical studies and practical applications in the field.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Wei Wang et al.
Summary: This paper investigates beam training designs for IRS-assisted mmWave communications, proposing an iterative positioning algorithm to achieve centimeter-level positioning accuracy. Results demonstrate the superiority of the proposed scheme and the performance gain from location information.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Zhibin Wang et al.
Summary: This article proposes to use intelligent reflecting surface (IRS) to enhance the efficiency of AirComp and EB in IoT networks. By jointly designing aggregation beamformers and IRS phase-shift matrices to minimize the mean-squared error (MSE), the proposed algorithm can significantly reduce the distortion of AirComp.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Computer Science, Information Systems
Ali Ranjha et al.
Summary: This article explores the use of unmanned aerial vehicles (UAVs) and reconfigurable intelligent surfaces (RISs) to support ultrareliable and low-latency traffic in upcoming 5G networks through passive beamforming and nonlinear optimization. The proposed approach shows better convergence performance and lower computation time compared to traditional methods, highlighting the importance of UAV position for achieving ultrahigh reliability in short packet transmission.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Placido Mursia et al.
Summary: The combination of re-configurable intelligent surfaces (RISs) and millimeter-wave technology (mmWave) in beyond 5G networks addresses the challenge of massive Internet-of-Things (IoT) access, with research showing that the new approach has advantages in improving system performance.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Meng Hua et al.
Summary: This paper investigates a symbiotic UAV-assisted IRS radio system, proposing relaxation-based and penalty-based algorithms to solve the weighted sum BER minimization problem and fairness BER optimization problem. Numerical results are provided for performance evaluation compared to benchmarks.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Wanming Hao et al.
Summary: This article explores an IRS-aided multiuser THz MIMO system and optimizes the base station analog/digital beamforming and IRS reflection matrix to maximize the weighted sum rate. It proposes an alternatively iterative optimization algorithm and discusses beamforming and reflection matrix design under imperfect CSI in IRS-based systems.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Telecommunications
Eyad Shtaiwi et al.
Summary: This paper investigates the channel estimation problem for RIS-aided MU-MIMO system, proposing an algorithm to estimate the composite channel, separate RIS-based channels, and direct channel by dividing the entire RIS surface into small sub-RISs and controlling the phase shifts for each sub-RIS unit. The simulation results confirm the efficiency and effectiveness of the proposed approach algorithm.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2021)
Article
Engineering, Electrical & Electronic
Shuhao Xia et al.
Summary: This paper discusses massive connectivity with the aid of reconfigurable intelligent surfaces (RIS), focusing on activity detection and channel estimation in RIS-assisted systems. The proposed algorithm uses non-orthogonal pilot sequences and models the RIS-to-BS channel as a sparse channel. By applying an approximate message passing (AMP) algorithm and Bayesian inference framework, the computational complexity is reduced while maintaining effectiveness.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Li You et al.
Summary: The study focuses on the tradeoff between energy efficiency and spectral efficiency in multiuser MIMO uplink communications aided by reconfigurable intelligent surfaces. A transmission strategy based on partial channel state information and joint optimization of transmit precoding and reflective beamforming is developed to maximize resource efficiency. Numerical results show the effectiveness and rapid convergence rate of the proposed optimization framework.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Sarath Gopi et al.
Summary: Millimeter wave communication can be effectively combined with intelligent reflecting surfaces and beam-index modulation to eliminate line-of-sight blockage at millimeter wave frequencies. Three different architectures based on IRS are proposed for beam-index modulation in millimeter wave communication. The schemes include single-symbol, multi-symbol, and maximum-SNR beam index modulation, as well as a low-cost twin-IRS structure. Optimal maximum likelihood detector and low-complexity compressed sensing detector are designed for the proposed schemes. Evaluation of the schemes through extensive simulations and comparison with analytical bounds are conducted.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Ertugrul Basar
IEEE TRANSACTIONS ON COMMUNICATIONS
(2020)
Article
Computer Science, Hardware & Architecture
Wankai Tang et al.
IEEE WIRELESS COMMUNICATIONS
(2020)
Article
Computer Science, Information Systems
Beixiong Zheng et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Engineering, Electrical & Electronic
Yifei Yang et al.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2020)
Article
Computer Science, Information Systems
Yuan Zheng et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Computer Science, Information Systems
Guanghua Yu et al.
IEEE INTERNET OF THINGS JOURNAL
(2020)
Article
Computer Science, Information Systems
Ayse E. Canbilen et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Engineering, Electrical & Electronic
Henk Wymeersch et al.
IEEE VEHICULAR TECHNOLOGY MAGAZINE
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Jingwen Zhang et al.
2020 IEEE/CIC INTERNATIONAL CONFERENCE ON COMMUNICATIONS IN CHINA (ICCC)
(2020)
Article
Engineering, Electrical & Electronic
Shaoe Lin et al.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Marco Di Renzo et al.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Jiakuo Zuo et al.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Teng Ma et al.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Gui Zhou et al.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2020)
Article
Engineering, Electrical & Electronic
Gui Zhou et al.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2020)
Article
Computer Science, Information Systems
Alexandros-Apostolos A. Boulogeorgos et al.
Review
Engineering, Electrical & Electronic
Marco Di Renzo et al.
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
(2019)
Article
Engineering, Electrical & Electronic
Yu Han et al.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2019)
Article
Engineering, Electrical & Electronic
Chongwen Huang et al.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2019)
Article
Engineering, Electrical & Electronic
Qingqing Wu et al.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2019)
Article
Computer Science, Information Systems
Miao Cui et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2019)
Article
Computer Science, Information Systems
Ertugrul Basar et al.
Article
Engineering, Electrical & Electronic
Sha Hu et al.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2018)
Article
Engineering, Electrical & Electronic
Sha Hu et al.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2018)
Article
Engineering, Electrical & Electronic
Christos Liaskos et al.
IEEE COMMUNICATIONS MAGAZINE
(2018)
Article
Engineering, Electrical & Electronic
Sean Victor Hum et al.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2014)
Article
Optics
Tie Jun Cui et al.
LIGHT-SCIENCE & APPLICATIONS
(2014)
Article
Engineering, Electrical & Electronic
Christopher L. Holloway et al.
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2012)
