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Cooperative reconfigurable intelligent surfaces (RISs) are promising technologies for 6G networks to support a great number of users. Compared with the fixed RISs, the properly deployed RISs may improve the communication performance with…

Signal Processing · Electrical Eng. & Systems 2025-09-16 Hongyang Pan , Yanheng Liu , Geng Sun , Qingqing Wu , Tierui Gong , Pengfei Wang , Dusit Niyato , Chau Yuen

In traditional spread-spectrum techniques, a wideband transmit signal is obtained by modulating a wideband carrier by a narrowband signal containing a relatively low-rate message. In the receiver, the respective demodulation/despreading…

Signal Processing · Electrical Eng. & Systems 2020-08-17 Alexei V. Nikitin , Ruslan L. Davidchack

In this paper, the sensing beam pattern gain under simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RIS)-enabled integrated sensing and communications (ISAC) systems is investigated, in which multiple…

Information Theory · Computer Science 2024-02-07 Shuang Zhang , Wanming Hao , Gangcan Sun , Zhengyu Zhu , Xingwang Li , Qingqing Wu

Conventional sub-Nyquist sampling methods for analog signals exploit prior information about the spectral support. In this paper, we consider the challenging problem of blind sub-Nyquist sampling of multiband signals, whose unknown…

Information Theory · Computer Science 2015-05-13 Moshe Mishali , Yonina C. Eldar

Indoor environments typically contain diverse RF signals distributed across multiple frequency bands, including NB-IoT, Wi-Fi, and millimeter-wave. Consequently, wideband RF modeling is essential for practical applications such as joint…

Networking and Internet Architecture · Computer Science 2026-03-26 Zechen Li , Lanqing Yang , Yiheng Bian , Hao Pan , Yongjian Fu , Yezhou Wang , Zhuxi Chen , Yi-Chao Chen , Guangtao Xue

Intelligent reflecting surface (IRS) is envisioned as a promising solution for controlling radio propagation environments in future wireless systems. In this paper, we propose a distributed intelligent reflecting surface (IRS) assisted…

Signal Processing · Electrical Eng. & Systems 2020-11-02 Yashuai Cao , Tiejun Lv , Wei Ni

We consider unmanned aerial vehicle (UAV)-enabled wireless systems where downlink communications between a multi-antenna UAV and multiple users are assisted by a hybrid active-passive reconfigurable intelligent surface (RIS). We aim at a…

Information Theory · Computer Science 2023-09-22 Nhan Thanh Nguyen , Van-Dinh Nguyen , Hieu Van Nguyen , Qingqing Wu , Antti Tolli , Symeon Chatzinotas , Markku Juntti

The integration of unmanned aerial vehicles (UAVs) into wireless networks has opened a new horizon to meet the capacity and coverage requirements foreseen in future wireless networks. Harnessing UAVs as flying base stations (BSs) has helped…

Networking and Internet Architecture · Computer Science 2018-10-19 Rabe Arshad , Lutz Lampe , Hesham ElSawy , Md. Jahangir Hossain

In this correspondence, we propose to use an intelligent reflective surface (IRS) installed on unmanned aerial vehicle (UAV), referred to as aerial IRS (AIRS), for vehicular networks, where simultaneous wireless information and power…

Information Theory · Computer Science 2024-01-24 Gyoungyoon Nam , Seokhyun Lee , Seongah Jeong

This paper proposes a novel approach to improve the performance of a heterogeneous network (HetNet) supported by dual connectivity (DC) by adopting multiple unmanned aerial vehicles (UAVs) as passive relays that carry reconfigurable…

Information Theory · Computer Science 2021-06-25 Ata Khalili , Ehsan Mohammadi Monfard , Shayan Zargari , Mohammad Reza. Javan , Nader Mokari , Eduard A. Jorswieck

It is anticipated that integrating unmanned aerial vehicles (UAVs) with reconfigurable intelligent surfaces (RISs), resulting in RIS-assisted UAV networks, will offer improved network connectivity against node failures for the beyond 5G…

Information Theory · Computer Science 2023-08-10 Mohammed S. Al-Abiad , Mohammad Javad-Kalbasi , Shahrokh Valaee

Intelligent Transportation Systems are thriving thanks to a wide range of technological advances, namely 5G communications, Internet of Things, artificial intelligence and edge computing. Central to this is the wide deployment of smart…

Image and Video Processing · Electrical Eng. & Systems 2021-08-26 Ahmed Al-Hilo , Moataz Samir , Mohamed Elhattab , Chadi Assi , Sanaa Sharafeddine

An Unmanned Aerial Vehicle (UAV) is a promising technology for providing wireless coverage to ground user devices. For all the infrastructure communication networks destroyed in disasters, UAVs battery life is challenging during service…

Monitoring crop fields to map features like weeds can be efficiently performed with unmanned aerial vehicles (UAVs) that can cover large areas in a short time due to their privileged perspective and motion speed. However, the need for…

Integrated sensing and communications (ISAC) are envisioned to be an integral part of future wireless networks, especially when operating at the millimeter-wave (mmWave) and terahertz (THz) frequency bands. However, establishing wireless…

Signal Processing · Electrical Eng. & Systems 2022-11-03 Sundeep Prabhakar Chepuri , Nir Shlezinger , Fan Liu , George C. Alexandropoulos , Stefano Buzzi , Yonina C. Eldar

The integration of sensing and communication can achieve ubiquitous sensing while enabling ubiquitous communication. Within the gradually improving global communication, the integrated sensing and communication (ISAC) system based on…

Quantum Physics · Physics 2024-03-20 Yuehan Xu , Tao Wang , Peng Huang , Guihua Zeng

Aiming at the limited battery capacity of widely deployed low-power smart devices in the Internet-of-things (IoT), this paper proposes a novel intelligent reflecting surface (IRS) empowered unmanned aerial vehicle (UAV) simultaneous…

Signal Processing · Electrical Eng. & Systems 2022-10-28 Zhendong Li , Wen Chen , Huanqing Cao , Hongying Tang , Kunlun Wang , Jun Li

In this paper, a novel communication framework that uses an unmanned aerial vehicle (UAV)-carried intelligent reflector (IR) is proposed to enhance multi-user downlink transmissions over millimeter wave (mmWave) frequencies. In order to…

Information Theory · Computer Science 2020-11-04 Qianqian Zhang , Walid Saad , Mehdi Bennis

In the realm of wireless communications in 5G, 6G and beyond, deploying unmanned aerial vehicle (UAV) has been an innovative approach to extend the coverage area due to its easy deployment. Moreover, reconfigurable intelligent surface (RIS)…

Networking and Internet Architecture · Computer Science 2022-12-09 Pyae Sone Aung , Yu Min Park , Yan Kyaw Tun , Zhu Han , Choong Seon Hong

The deployment of unmanned aerial vehicles (UAVs) is proliferating as they are effective, flexible and cost-efficient devices for a variety of applications ranging from natural disaster recovery to delivery of goods. We investigate a…

Signal Processing · Electrical Eng. & Systems 2019-09-30 Ali Rahmati , Seyyedali Hosseinalipour , Yavuz Yapici , Xiaofan He , Ismail Guvenc , Huaiyu Dai , Arupjyoti Bhuyan