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Intelligent Reflecting Surfaces Beamforming Optimization with Statistical Channel Knowledge

Victoria Dala Pegorara Souto, Richard Demo Souza, Bartolomeu F. Uchôa-Filho, Yonghui Li
2022 Sensors  
To overcome this problem, a new approach is proposed in order to optimize beamforming at the BS and the phase shifts at the IRS without considering any knowledge of I-CSI but while only exploring the statistical  ...  Intelligent Reflecting Surfaces (IRSs) are emerging as an effective technology capable of improving the spectral and energy efficiency of future wireless networks.  ...  Introduction Intelligent reflecting surfaces (IRS), also called reconfigurable intelligent surfaces [1] , and software-controlled metasurfaces [2] , have recently attracted great interest.  ... 
doi:10.3390/s22062390 pmid:35336560 pmcid:PMC8948803 fatcat:wypfslo5rrforcati4z7thni6u

Configuring Intelligent Reflecting Surface with Performance Guarantees: Blind Beamforming [article]

Shuyi Ren, Kaiming Shen, Yaowen Zhang, Xin Li, Xin Chen, Zhi-Quan Luo
2021 arXiv   pre-print
This work gives a blind beamforming strategy for intelligent reflecting surface (IRS), aiming to boost the received signal-to-noise ratio (SNR) by coordinating phase shifts across reflective elements in  ...  While the existing methods of IRS beamforming typically first estimate channels and then optimize phase shifts, we propose a conditional sample mean based statistical approach that explores the wireless  ...  Chatzinotas, MISO systems with joint transmit and reflective beamforming,” IEEE “Deep channel learning for large intelligent surfaces aided mm-Wave Trans.  ... 
arXiv:2112.02285v1 fatcat:ckp7pzq2s5dnbbuqo52bkp6p6q

Sum-Rate Maximization of RIS-Aided Multi-User MIMO Systems With Statistical CSI [article]

Huan Zhang, Shaodan Ma, Zheng Shi, Xin Zhao, Guanghua Yang
2021 arXiv   pre-print
This paper investigates a reconfigurable intelligent surface (RIS)-aided multi-user multiple-input multiple-output (MIMO) system by considering only the statistical channel state information (CSI) at the  ...  By comparing to the case of the instantaneous CSI assumed at the BS, the proposed algorithm based on statistical CSI can achieve comparable performance but with much lower complexity and signaling overhead  ...  Alouini, “Intelligent reflecting surface-assisted multi-user MISO communication: Channel estimation and beamforming design,” ” IEEE Open J. Commun.  ... 
arXiv:2112.11936v1 fatcat:3mvqeexurbemvgca7u5e2vsmsy

Intelligent Reflecting Surface Aided Multicasting with Random Passive Beamforming [article]

Qin Tao, Shuowen Zhang, Caijun Zhong, Rui Zhang
2020 arXiv   pre-print
In this letter, we consider a multicast system where a single-antenna transmitter sends a common message to multiple single-antenna users, aided by an intelligent reflecting surface (IRS) equipped with  ...  In contrast, we propose in this letter a novel random passive beamforming scheme, where the IRS performs independent random reflection for Q≥ 1 times in each channel coherence interval without the need  ...  Particularly, the existing works on IRS have mostly considered a "fully intelligent" reflecting surface with the availability of full channel state information (CSI) for all the IRS-associated links (see  ... 
arXiv:2009.00274v1 fatcat:mlc6twbumnfppbfwgkshrdfttu

2020 Index IEEE Journal on Selected Areas in Communications Vol. 38

2020 IEEE Journal on Selected Areas in Communications  
., +, J-SAC Aug. 2020 1719-1734 Joint Active and Passive Beamforming Optimization for Intelligent Reflecting Surface Assisted SWIPT Under QoS Constraints.  ...  ., +, J-SAC Sept. 2020 2074-2085 Joint Active and Passive Beamforming Optimization for Intelligent Reflecting Surface Assisted SWIPT Under QoS Constraints.  ... 
doi:10.1109/jsac.2020.3040054 fatcat:amlms4xhs5a3hgnldh4bahb2wu

RIS-Assisted Secure Transmission Exploiting Statistical CSI of Eavesdropper [article]

Cen Liu, Chang Tian, Peixi Liu
2021 arXiv   pre-print
We investigate the reconfigurable intelligent surface (RIS) assisted downlink secure transmission where only the statistical channel of eavesdropper is available.  ...  Simulation results show that the proposed PDCA scheme is better than the commonly adopted alternating optimization (AO) scheme with the knowledge of statistical channel of eavesdropper.  ...  Abstract-We investigate the reconfigurable intelligent surface (RIS) assisted downlink secure transmission where only the statistical channel of eavesdropper is available.  ... 
arXiv:2012.02466v2 fatcat:6tnvh662czeqba6hucw4wzp2xa

2021 Index IEEE Transactions on Wireless Communications Vol. 20

2021 IEEE Transactions on Wireless Communications  
., +, TWC April 2021 2670-2684 Two-Timescale Beamforming Optimization for Intelligent Reflecting Surface Aided Multiuser Communication With QoS Constraints.  ...  ., +, TWC Aug. 2021 5226-5242 Intelligent Reflecting Surface Enhanced Wireless Networks: Two-Timescale Beamforming Optimization.  ...  Maximum likelihood estimation Bayesian Predictive Beamforming for Vehicular Networks: A Low-Overhead Joint Radar-Communication Approach.  ... 
doi:10.1109/twc.2021.3135649 fatcat:bgd3vzb7pbee7jp75dnbucihmq

Guest Editoral Signal Processing Advances in Wireless Transmission of Information and Power

Bruno Clerckx, Kaibin Huang, Lav Varshney, Sennur Ulukus, Mohamed-Slim Alouini
2021 IEEE Journal on Selected Topics in Signal Processing  
Topics include high-power amplifier and energy harvester nonlinearities, active and passive beamforming, intelligent reflecting surfaces, receive combining with multi-antenna harvester, modulation, coding  ...  Yu et al. take simultaneous information and energy transmission into the air, making use of intelligent reflecting surfaces on both UAVs and ground building to enhance the wireless channel and facilitate  ... 
doi:10.1109/jstsp.2021.3095601 fatcat:opq4ngkdrvhn3bpnmb6nqnt2oe

A Survey on Channel Estimation and Practical Passive Beamforming Design for Intelligent Reflecting Surface Aided Wireless Communications [article]

Beixiong Zheng, Changsheng You, Weidong Mei, Rui Zhang
2022 arXiv   pre-print
Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize smart and reconfigurable radio environment for wireless communications, by digitally controlling the signal reflection  ...  However, despite its great potential, IRS faces new and unique challenges in its efficient integration into wireless communication systems, especially its channel estimation and passive beamforming design  ...  Note that in the current literature, there are other equivalent terms of IRS, such as reconfigurable intelligent surface (RIS) [13] , [14] , large intelligent surface/antennas (LISA) [15] , smart reflect-array  ... 
arXiv:2110.01292v3 fatcat:c47cn4a42zdhtetjinozjtqb6e

Reconfigurable Intelligent Surfaces: Principles and Opportunities [article]

Yuanwei Liu, Xiao Liu, Xidong Mu, Tianwei Hou, Jiaqi Xu, Marco Di Renzo, Naofal Al-Dhahir
2021 arXiv   pre-print
Reconfigurable intelligent surfaces (RISs), also known as intelligent reflecting surfaces (IRSs), or large intelligent surfaces (LISs), have received significant attention for their potential to enhance  ...  In this context, we provide a comprehensive overview of the state-of-the-art on RISs, with focus on their operating principles, performance evaluation, beamforming design and resource management, applications  ...  Index Terms 6G, intelligent reflecting surface (IRS), machine learning, performance optimization, reconfigurable intelligent surface (RIS), wireless networks I.  ... 
arXiv:2007.03435v3 fatcat:pynhymbavfhgrmqnhzjndxnthq

Reconfigurable-Intelligent-Surface Empowered Wireless Communications: Challenges and Opportunities [article]

Xiaojun Yuan, Ying-Jun Angela Zhang, Yuanming Shi, Wenjing Yan, Hang Liu
2020 arXiv   pre-print
Reconfigurable intelligent surfaces (RISs) are regarded as a promising emerging hardware technology to improve the spectrum and energy efficiency of wireless networks by artificially reconfiguring the  ...  Due to the unique advantages in enhancing wireless channel capacity, RISs have recently become a hot research topic.  ...  Reconfigurable intelligent surfaces (RISs), a.k.a., large intelligent metasurfaces (LIMs) [2] and intelligent reflecting surfaces (IRSs) [3] , have been envisioned to reduce the energy consumption and  ... 
arXiv:2001.00364v3 fatcat:r46wtlmeibdzrj4xc2iqobctia

The Rise of Intelligent Reflecting Surfaces in Integrated Sensing and Communications Paradigms [article]

Ahmet M. Elbir and Kumar Vijay Mishra and M. R. Bhavani Shankar and Symeon Chatzinotas
2022 arXiv   pre-print
The intelligent reflecting surface (IRS) alters the behavior of wireless media and, consequently, has potential to improve the performance and reliability of wireless systems such as communications and  ...  We introduce possible IRS-assisted ISAC scenarios with common and dedicated surfaces.  ...  as reconfigurable intelligent surfaces and large intelligent surfaces -are envisaged in the sixth generation (6G) systems as a promising solution [4] .  ... 
arXiv:2204.07265v2 fatcat:wz4r3euk6jbono5hy7i6y7koyy

Reconfigurable Intelligent Surfaces with Reflection Pattern Modulation: Beamforming Design and Performance Analysis [article]

Shaoe Lin and Beixiong Zheng and George C. Alexandropoulos and Miaowen Wen and Marco Di Renzo and Fangjiong Chen
2020 arXiv   pre-print
Recent considerations for reconfigurable intelligent surfaces (RISs) assume that RISs can convey information by reflection without the need of transmit radio frequency chains, which, however, is a challenging  ...  We formulate an optimization problem to maximize the average received signal power by jointly optimizing the active beamforming at the access point (AP) and passive beamforming at the RIS for the case  ...  Leveraging the recent advances in reconfigurable metasurfaces [4] , [5] , reconfigurable intelligent surfaces (RISs) (a.k.a. intelligent reflecting surfaces) have emerged as a revolutionary technology  ... 
arXiv:2008.02555v1 fatcat:j2uraxls3zfajpl5aanrele7um

Static Reflecting Surface Based on Population-level Optimization

Hanan Al-Tous, Olav Tirkkonen
2021 2021 IEEE Global Communications Conference (GLOBECOM)  
The SRS has a high number of reflecting elements, with a static phase shift matrix, optimized offline at installation phase for a user population.  ...  We consider a Static Reflecting Surface (SRS) assisted communication system.  ...  INTRODUCTION Reconfigurable Intelligent Surfaces (RISs) are a promising technology for future communication systems.  ... 
doi:10.1109/globecom46510.2021.9685836 fatcat:iqjx7osrzvetbhzmzvgpigt6au

Smart and Reconfigurable Wireless Communications: From IRS Modeling to Algorithm Design [article]

Xianghao Yu, Vahid Jamali, Dongfang Xu, Derrick Wing Kwan Ng, Robert Schober
2021 arXiv   pre-print
Intelligent reflecting surfaces (IRSs) have been introduced into wireless communications systems due to their great potential to smartly customize and reconfigure radio propagation environments in a cost-effective  ...  Besides, a new framework based on partitioning the IRS into tiles and employing codebooks of transmission modes is introduced to enable scalable IRS optimization.  ...  channel, the passive beamforming matrix at the IRS is naturally multiplied with the conventional active beamforming vectors.  ... 
arXiv:2103.07046v1 fatcat:4okc4py7hvebbjv5qteyfs4spq
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