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This paper proposes a method for the three-dimensional localization of an active aerial target by a single ground based sensor. The proposed method employs the time and frequency differences of arrival of the signal received directly from…

Signal Processing · Electrical Eng. & Systems 2021-07-26 Saber Kaviani , Fereidoon Behnia

This paper proposed new hybrid, analog-digital, beamforming for a multiuser millimeter wave (mm-wave) relay system. For this system, we consider a sum rate maximization problem. The proposed hybrid beamforming is designed indirectly by…

Information Theory · Computer Science 2016-11-17 Xuan Xue , Tadilo Endeshaw Bogale , Xianbin Wang , Yongchao Wang , Long Bao Le

Hybrid plasmonic nanoemitters based on the combination of quantum dot emitters (QD) and plasmonic nanoantennas open up new perspectives in the control of light. However, precise positioning of any active medium at the nanoscale constitutes…

Synthetic images are one of the most promising solutions to avoid high costs associated with generating annotated datasets to train supervised convolutional neural networks (CNN). However, to allow networks to generalize knowledge from…

Computer Vision and Pattern Recognition · Computer Science 2021-03-11 Tobias Scheck , Ana Perez Grassi , Gangolf Hirtz

In this paper, we investigate hybrid analog/digital beamforming for multiple-input multiple-output (MIMO) systems with low-resolution analog-to-digital converters (ADCs) for millimeter wave (mmWave) communications. In the receiver, we…

Information Theory · Computer Science 2019-05-01 Jinseok Choi , Gilwon Lee , Brian L. Evans

Movable antenna (MA) has emerged as a promising technology to enhance wireless communication performance by exploiting the new degree of freedom (DoF) via antenna position optimization. In this letter, we investigate the MA-enhanced wide…

Signal Processing · Electrical Eng. & Systems 2026-01-01 Dong Wang , Weidong Mei , Zhi Chen , Boyu Ning

This letter proposes a hybrid mechanically and electronically tunable six-dimensional movable antenna (6DMA) base station (BS) architecture for future wireless communication networks. Such BS consists of multiple antenna arrays that are…

Information Theory · Computer Science 2026-01-21 Yuyan Zhou , Haocheng Hua , Jie Xu , Rui Zhang

This paper considers the problem of estimating the position and orientation of a user equipped with a three-dimensional (3D) array receiving downlink far-field THz signals from multiple base stations with known positions and orientations.…

Signal Processing · Electrical Eng. & Systems 2022-09-20 Pinjun Zheng , Tarig Ballal , Hui Chen , Henk Wymeersch , Tareq Y. Al-Naffouri

We investigate the problem of reconfigurable intelligent surface (RIS)-aided near-field localization of a user equipment (UE) served by a base station (BS) under phase-dependent amplitude variations at each RIS element. Through a…

Signal Processing · Electrical Eng. & Systems 2022-09-30 Cuneyd Ozturk , Musa Furkan Keskin , Henk Wymeersch , Sinan Gezici

Radio localization is a key enabler for joint communication and sensing in the fifth/sixth generation (5G/6G) communication systems. With the help of multipath components (MPCs), localization and mapping tasks can be done with a single base…

Signal Processing · Electrical Eng. & Systems 2022-06-01 Hui Chen , Fan Jiang , Yu Ge , Hyowon Kim , Henk Wymeersch

Complete absorption of electromagnetic waves is paramount in today's applications, ranging from photovoltaics to cross-talk prevention into sensitive devices. In this context, we use a genetic algorithm (GA) strategy to optimize absorption…

We address a dynamic covering location problem of an Unmanned Aerial Vehicle Base Station (UAV-BS), where the location sequence of a single UAV-BS in a wireless communication network is determined to satisfy data demand arising from ground…

Optimization and Control · Mathematics 2021-01-13 Cihan Tugrul Cicek , Zuo-Jun Max Shen , Hakan Gultekin , Bulent Tavli

Recent years have witnessed growing interest in the application of deep neural networks (DNNs) for receiver design, which can potentially be applied in complex environments without relying on knowledge of the channel model. However, the…

Information Theory · Computer Science 2023-02-14 Tomer Raviv , Sangwoo Park , Osvaldo Simeone , Yonina C. Eldar , Nir Shlezinger

Random Access is an important step in enabling the initial attachment of a User Equipment (UE) to a Base Station (gNB). The UE identifies itself by embedding a Preamble Index (RAPID) in the phase rotation of a known base sequence, which it…

Information Theory · Computer Science 2024-01-24 Rohit Singh , Anil Kumar Yerrapragada , Jeeva Keshav S , Radha Krishna Ganti

Hybrid analog-digital beamforming stands out as a key enabler for future communication systems with a massive number of antennas. In this paper, we investigate the hybrid precoder design problem for angle-of-departure (AoD) estimation,…

Information Theory · Computer Science 2024-10-24 Huiping Huang , Musa Furkan Keskin , Henk Wymeersch , Xuesong Cai , Linlong Wu , Johan Thunberg , Fredrik Tufvesson

This paper considers the problem of downlink localization and user equipments (UEs) tracking with an adaptive procedure for a range of distances. We provide the base station (BS) with two signaling schemes and the UEs with two localization…

Information Theory · Computer Science 2024-02-12 Georgios Mylonopoulos , Behrooz Makki , Stefano Buzzi , Gábor Fodor

This paper pioneers the field of multi-user holographic unmanned aerial vehicle (UAV) communications, laying a solid foundation for future innovations in next-generation aerial wireless networks. The study focuses on the challenging problem…

Six-dimensional movable antenna (6DMA) is a promising solution for enhancing wireless network capacity through the adjustment of both three-dimensional (3D) positions and 3D rotations of distributed antenna surfaces. Previous works mainly…

Information Theory · Computer Science 2024-12-09 Haozhe Wang , Xiaodan Shao , Beixiong Zheng , Xiaoming Shi , Rui Zhang

Recent advancements in large-scale position-reconfigurable antennas have opened up new dimensions to effectively utilize the spatial degrees of freedom (DoFs) of wireless channels. However, the deployment of existing antenna placement…

Information Theory · Computer Science 2026-05-04 Shicong Liu , Xianghao Yu , Shenghui Song , Khaled B. Letaief

Large-scale multiple-antenna systems with large bandwidth are fundamental for future wireless communications, where the base station employs a large antenna array. In this scenario, one problem faced is the large energy consumption as the…

Information Theory · Computer Science 2020-05-19 Z. Shao , L. Landau , R. C. de Lamare