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Modern indoor localization techniques are essential to overcome the weak GPS coverage in indoor environments. Recently, considerable progress has been made in Channel State Information (CSI) based indoor localization with signal…

信号处理 · 电气工程与系统科学 2022-05-18 Liping Wang , Sudeep Pasricha

Global Navigation Satellite Systems typically perform poorly in urban environments, where the likelihood of line-of-sight conditions between devices and satellites is low. Therefore, alternative location methods are required to achieve good…

机器学习 · 计算机科学 2023-04-11 Çağkan Yapar , Ron Levie , Gitta Kutyniok , Giuseppe Caire

This paper investigates user equipment (UE) assisted device-free networked sensing in the sixth-generation (6G) integrated sensing and communication (ISAC) system, where one base station (BS) and multiple UEs, such as unmanned aerial…

信号处理 · 电气工程与系统科学 2025-02-06 Xianzhen Guo , Qin Shi , Shuowen Zhang , Chengwen Xing , Liang Liu

This paper investigates an uplink user equipment (UE) location and orientation estimation problem in an indoor rich-scattering environment (RSE) for a multiple-input-multiple-output (MIMO) narrowband reconfigurable intelligent surfaces…

信号处理 · 电气工程与系统科学 2026-04-21 Anum Umer , Ivo Müürsepp , Muhammad Mahtab Alam

We propose a method for predicting the location of user equipment (UE) using wireless fingerprints in dynamic indoor non-line-of-sight (NLoS) environments. In particular, our method copes with the challenges posed by the drift, birth, and…

信号处理 · 电气工程与系统科学 2024-08-28 Rafail Ismayilov , Renato L. G. Cavalcante , Slawomir Stanczak

Location information is essential to varieties of applications. It is one of the most important context to be detected by wireless distributed sensors, which is a key technology in Internet-of-Things. Fingerprint-based methods, which…

信号处理 · 电气工程与系统科学 2018-04-09 Tao Yu , Azril Haniz , Kentaro Sano , Ryosuke Iwata , Ryouta Kosaka , Yusuke Kuki , Gia Khanh Tran , Jun-Ichi Takada , Kei Sakaguchi

A recent way to model and analyze downlink cellular networks is by using random spatial models. Assuming user equipment (UE) distribution to be uniform, the analysis is performed at a typical UE located at the origin. While this method of…

信息论 · 计算机科学 2016-11-17 Harpreet S. Dhillon , Radha Krishna Ganti , Jeffrey G. Andrews

Fake base station (FBS) attack is a great security challenge to wireless user equipment (UE). During the cell selection stage, the UE receives multiple synchronization signals (SSs) from multiple nearby base stations (BSs), and then…

信息论 · 计算机科学 2018-06-15 Ke-Wen Huang , Hui-Ming Wang

When operating massive multiple-input multiple-output (MIMO) systems with uplink (UL) and downlink (DL) channels at different frequencies (frequency division duplex (FDD) operation), acquisition of channel state information (CSI) for…

信息论 · 计算机科学 2022-09-23 Florian Euchner , Niklas Süppel , Marc Gauger , Sebastian Dörner , Stephan ten Brink

Fingerprinting-based positioning significantly improves the indoor localization performance in non-line-of-sight-dominated areas. However, its deployment and maintenance is cost-intensive as it needs ground-truth reference systems for both…

信号处理 · 电气工程与系统科学 2022-10-13 Maximilian Stahlke , George Yammine , Tobias Feigl , Bjoern M. Eskofier , Christopher Mutschler

High-precision positioning is vital for cellular networks to support innovative applications such as extended reality, unmanned aerial vehicles (UAVs), and industrial Internet of Things (IoT) systems. Existing positioning algorithms using…

信号处理 · 电气工程与系统科学 2025-09-03 Shugong Xu , Jun Jiang , Wenjun Yu , Yilin Gao , Guangjin Pan , Shiyi Mu , Zhiqi Ai , Yuan Gao , Peigang Jiang , Cheng-Xiang Wang

This paper presents an end-to-end deep learning framework for electromagnetically reconfigurable antenna (ERA)-aided user localization with active sensing, where ERAs provide additional electromagnetic reconfigurability to diversify the…

信号处理 · 电气工程与系统科学 2026-01-30 Ruizhi Zhang , Yuchen Zhang , Ying Zhang

This paper introduces a novel framework for high-accuracy outdoor user equipment (UE) positioning that applies a conditional generative diffusion model directly to high-dimensional massive MIMO channel state information (CSI). Traditional…

网络与互联网体系结构 · 计算机科学 2025-10-17 Taekyun Lee , Tommaso Balercia , Heasung Kim , Hyeji Kim , Jeffrey G. Andrews

In the literature, machine learning (ML) has been implemented at the base station (BS) and user equipment (UE) to improve the precision of downlink channel state information (CSI). However, ML implementation at the UE can be infeasible for…

信息论 · 计算机科学 2024-03-21 Muhammad Karam Shehzad , Luca Rose , Mohamad Assaad

In this paper, we propose a learning-based low-overhead channel estimation method for coordinated beamforming in ultra-dense networks. We first show through simulation that the channel state information (CSI) of geographically separated…

信息论 · 计算机科学 2017-05-16 Sheng Chen , Zhiyuan Jiang , Jingchu Liu , Rath Vannithamby , Sheng Zhou , Zhisheng Niu , Ye Wu

In cellular systems, the user equipment (UE) can request a change in the frequency band when its rate drops below a threshold on the current band. The UE is then instructed by the base station (BS) to measure the quality of candidate bands,…

网络与互联网体系结构 · 计算机科学 2020-09-15 Faris B. Mismar , Ahmad AlAmmouri , Ahmed Alkhateeb , Jeffrey G. Andrews , Brian L. Evans

The paper presents a novel Wi-Fi fingerprinting system that uses Channel State Information (CSI) data for fine-grained pedestrian localization. The proposed system exploits the frequency diversity and spatial diversity of the features…

计算机视觉与模式识别 · 计算机科学 2024-12-31 Muhammad Emad-ud-din

The unmanned aerial vehicles base stations (UAV-BSs) have great potential in being widely used in many dynamic application scenarios. In those scenarios, the movements of served user equipments (UEs) are inevitable, so the UAV-BSs needs to…

网络与互联网体系结构 · 计算机科学 2019-10-08 Haoran Peng , Chao Chen , Chuan-Chi Lai , Li-Chun Wang , Zhu Han

Knowledge of the channel state information (CSI) at the transmitter side is one of the primary sources of information that can be used for the efficient allocation of wireless resources. Obtaining downlink (DL) CSI in Frequency Division…

信号处理 · 电气工程与系统科学 2019-12-03 Mohammad Sadegh Safari , Vahid Pourahmadi , Shabnam Sodagari

The first step of a secure communication is authenticating legible users and detecting the malicious ones. In the last recent years, some promising schemes proposed using wireless medium network's features, in particular, channel state…

网络与互联网体系结构 · 计算机科学 2018-12-18 Amirhossein Yazdani Abyaneh , Ali Hosein Gharari Foumani , Vahid Pourahmadi