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The Giant Metrewave Radio Telescope (GMRT) is being upgraded to increase the receiver sensitivity. This makes the receiver more susceptible to man-made Radio Frequency Interference (RFI). To improve the receiver performance in presence of…

天体物理仪器与方法 · 物理学 2022-09-21 Kaushal D. Buch , Kishor Naik , Swapnil Nalawade , Shruti Bhatporia , Yashwant Gupta , B Ajithkumar

Given the rapid advancements in wireless communication and terminal devices, high-speed and convenient WiFi has permeated various aspects of people's lives, and attention has been drawn to the location services that WiFi can provide.…

信号处理 · 电气工程与系统科学 2023-07-03 Jiyu Jiao , Xiaojun Wang , Chenlin He

Providing care for ageing populations is an onerous task, and as life expectancy estimates continue to rise, the number of people that require senior care is growing rapidly. This paper proposes a methodology based on Transformer Neural…

信号处理 · 电气工程与系统科学 2020-11-25 Luke Hicks , Ariel Ruiz-Garcia , Vasile Palade , Ibrahim Almakky

Increasing attention to the research on activity monitoring in smart homes has motivated the employment of ambient intelligence to reduce the deployment cost and solve the privacy issue. Several approaches have been proposed for…

计算机视觉与模式识别 · 计算机科学 2018-06-19 Son N. Tran , Qing Zhang , Mohan Karunanithi

In this paper, a channel estimation technique for reconfigurable intelligent surface (RIS)-aided multi-user multiple-input single-output communication systems is proposed. By deploying a small number of active elements at the RIS, the RIS…

信息论 · 计算机科学 2023-02-09 Gyoseung Lee , Hyeongtaek Lee , Jaeky Oh , Jaehoon Chung , Junil Choi

The phase of the channel state information (CSI) is underutilized as a source of information in wireless sensing due to its sensitivity to synchronization errors of the signal reception. A linear transformation of the phase is commonly…

信号处理 · 电气工程与系统科学 2023-10-16 Guillermo Diaz , Iker Sobron , Iñaki Eizmendi , Iratxe landa , Manuel Velez

We propose a sparse-coding framework for activity recognition in ubiquitous and mobile computing that alleviates two fundamental problems of current supervised learning approaches. (i) It automatically derives a compact, sparse and…

机器学习 · 计算机科学 2014-07-24 Sourav Bhattacharya , Petteri Nurmi , Nils Hammerla , Thomas Plötz

Augmented reality devices have the potential to enhance human perception and enable other assistive functionalities in complex conversational environments. Effectively capturing the audio-visual context necessary for understanding these…

计算机视觉与模式识别 · 计算机科学 2022-01-07 Hao Jiang , Calvin Murdock , Vamsi Krishna Ithapu

One in four people dementia live alone, leading family members to take on caregiving roles from a distance. Many researchers have developed remote monitoring solutions to lessen caregiving needs; however, limitations remain including…

声音 · 计算机科学 2025-09-01 Dong Yoon Lee , Alyssa Weakley , Hui Wei , Blake Brown , Keyana Carrion , Shijia Pan

Radio-Frequency (RF) based device-free Human Activity Recognition (HAR) rises as a promising solution for many applications. However, device-free (or contactless) sensing is often more sensitive to environment changes than device-based (or…

信号处理 · 电气工程与系统科学 2021-11-09 Shuya Ding , Zhe Chen , Tianyue Zheng , Jun Luo

Intelligent reflecting surface (IRS) has emerged as a cost-effective solution to enhance wireless communication performance via passive signal reflection. Existing works on IRS have mainly focused on investigating IRS's passive…

信息论 · 计算机科学 2022-07-19 Beixiong Zheng , Rui Zhang

Signal artefacts due to Radio Frequency Interference (RFI) are a common nuisance in radio astronomy. Conventionally, the RFI-affected data are tagged by an expert data analyst in order to warrant data quality. In view of the increasing data…

天体物理仪器与方法 · 物理学 2018-08-30 Paul Ray Burd , Karl Mannheim , Tobias März , Jonas Ringholz , Alexander Kappes , Matthias Kadler

In this paper classification of mental task-root Brain-Computer Interfaces (BCI) is being investigated, as those are a dominant area of investigations in BCI and are of utmost interest as these systems can be augmented life of people having…

Radio Frequency Interference (RFI), the presence of artificial and/or terrestrial signals in astronomical data, poses a great challenge to the search for pulsars and radio transients, such as Rotating Radio Transients (RRATs) and Fast Radio…

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

We address the well-known wearable activity recognition problem of having to work with sensors that are non-optimal in terms of information they provide but have to be used due to wearability/usability concerns (e.g. the need to work with…

机器学习 · 计算机科学 2022-10-05 Vitor Fortes Rey , Sungho Suh , Paul Lukowicz

The deployment of multiple reconfigurable intelligent surfaces (RISs) enhances the propagation environment by improving channel quality, but it also complicates channel estimation. Following the conventional wireless communication system…

信息论 · 计算机科学 2024-11-22 Weicong Chen , Yu Han , Chao-Kai Wen , Xiao Li , Shi Jin

Active learning aims to train accurate classifiers while minimizing labeling costs by strategically selecting informative samples for annotation. This study focuses on image classification tasks, comparing AL methods on CIFAR10, CIFAR100,…

计算机视觉与模式识别 · 计算机科学 2024-11-12 Moseli Mots'oehli , kyungim Baek

Machine learning drives Channel State Information (CSI)-based human sensing in modern wireless networks, enabling applications like device-free human activity recognition (HAR) and identification (HID). However, the susceptibility of these…

机器学习 · 计算机科学 2026-04-03 Shreevanth Krishnaa Gopalakrishnan , Stephen Hailes

Device-free human activity recognition plays a pivotal role in wireless sensing. However, current systems often fail to accommodate signal transmission through walls or necessitate dedicated noise removal algorithms. To overcome these…

系统与控制 · 电气工程与系统科学 2024-10-04 Junshuo Liu , Yunlong Huang , Jianan Zhang , Rujing Xiong , Robert Caiming Qiu