Journal ArticleDOI
Mobile User Trajectory Tracking for IRS Enabled Wireless Networks
TLDR
In this paper, the authors considered an intelligent reflecting surface (IRS) enabled mobile network, where a fixed access point (AP) communicates with a mobile user (MU) via the aid of an IRS.Abstract:
In this paper, we consider an intelligent reflecting surface (IRS) enabled mobile network, where a fixed access point (AP) communicates with a mobile user (MU) via the aid of an IRS. We assume that the MU moves from one elementary square to another following a Markov random walk within a grid, and propose a maximum a posteriori (MAP) criterion to track the movement of the MU by leveraging the line-of-sight component of the IRS-MU link. Since it is infeasible to derive an explicit expression for the average probability of estimation error (APEE) for the proposed MAP criterion, we derive a closed-form upper bound for the APEE, which is used as the cost function to optimize the phase shifts of the IRS units. Considering the unit modulus constraints incurred by the IRS units, a manifold optimization (MO) method is firstly employed to gain a favorable solution to the formulated optimization problem, followed by a low-complexity codebook based solution to circumvent the high computational cost of the MO method. Our numerical results demonstrate the superior performance of the proposed IRS phase shift designs over the benchmark method.read more
Citations
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Journal ArticleDOI
Mobility-Aware User Association Strategy for IRS-Aided mm-Wave Multibeam Transmission Towards 6G
TL;DR: This paper proposes an IRS–user association strategy considering user mobility for IRS-aided multibeam transmission systems, and aims to optimize the long-term performance of systems in terms of capacity and reliability.
Journal ArticleDOI
Structured OMP for IRS-Assisted Mmwave Channel Estimation by Exploiting Angular Spread
TL;DR: A structured orthogonal matching pursuit (S-OMP) algorithm is proposed to efficiently solve the CE problem by utilizing the structure of the channel matrix in row and column without a priori knowledge of the angular spread.
Proceedings ArticleDOI
Redirected Walking with IRS-assisted Beamforming
TL;DR: Wang et al. as discussed by the authors investigated Path Planning with Cybersickness and IRS Control (PPCIC) in an indoor redirected walking (RW) system with virtual reality (VR) devices.
Journal ArticleDOI
IRS-aided network scheme supports unmanned aerial vehicle communication
TL;DR: In this article , the authors proposed employing RIS equipped on the rooftop of buildings to create ground-to-air data links between the terrestrial base stations (BSs) and UAVs without any change in the terrestrial infrastructure.
Journal ArticleDOI
Redirected Walking with IRS-assisted Beamforming
TL;DR: Simulation results show that the proposed algorithm with Cybersickness Indicator (CI) and SINR Indicators (SI) outperforms the baselines regarding the total cost, cyberedickness, and received signal strength of each path.
References
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Book
Fundamentals of Wireless Communication
David Tse,Pramod Viswanath +1 more
TL;DR: In this paper, the authors propose a multiuser communication architecture for point-to-point wireless networks with additive Gaussian noise detection and estimation in the context of MIMO networks.
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Intelligent Reflecting Surface Enhanced Wireless Network via Joint Active and Passive Beamforming
Qingqing Wu,Rui Zhang +1 more
TL;DR: Simulation results demonstrate that an IRS-aided single-cell wireless system can achieve the same rate performance as a benchmark massive MIMO system without using IRS, but with significantly reduced active antennas/RF chains.
Journal ArticleDOI
Towards Smart and Reconfigurable Environment: Intelligent Reflecting Surface Aided Wireless Network
Qingqing Wu,Rui Zhang +1 more
TL;DR: In this paper, the authors provide an overview of the IRS technology, including its main applications in wireless communication, competitive advantages over existing technologies, hardware architecture as well as the corresponding new signal model.
Journal ArticleDOI
Smart radio environments empowered by reconfigurable AI meta-surfaces: an idea whose time has come
Marco Di Renzo,Merouane Debbah,Dinh-Thuy Phan-Huy,Alessio Zappone,Mohamed-Slim Alouini,Chau Yuen,Vincenzo Sciancalepore,George C. Alexandropoulos,Jakob Hoydis,Haris Gacanin,Julien de Rosny,Ahcène Bounceur,Geoffroy Lerosey,Mathias Fink +13 more
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Alternating Minimization Algorithms for Hybrid Precoding in Millimeter Wave MIMO Systems
TL;DR: Treating the hybrid precoder design as a matrix factorization problem, effective alternating minimization (AltMin) algorithms will be proposed for two different hybrid precoding structures, i.e., the fully-connected and partially-connected structures, and simulation comparisons between the two hybrid precode structures will provide valuable design insights.
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