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We study the problem of indoor localization using commodity WiFi channel state information (CSI) measurements. The accuracy of methods developed to address this problem is limited by the overall bandwidth used by the WiFi device as well as…

Networking and Internet Architecture · Computer Science 2019-03-07 Mahdi Barzegar Khalilsarai , Stelios Stefanatos , Gerhard Wunder , Giuseppe Caire

This paper studies a WiFi indoor localisation technique based on using a deep learning model and its transfer strategies. We take CSI packets collected via the WiFi standard channel sounding as the training dataset and verify the CNN model…

Machine Learning · Computer Science 2021-03-10 Peizheng Li , Han Cui , Aftab Khan , Usman Raza , Robert Piechocki , Angela Doufexi , Tim Farnham

Device-free Wi-Fi indoor localization has received significant attention as a key enabling technology for many Internet of Things (IoT) applications. Machine learning-based location estimators, such as the deep neural network (DNN), carry…

Networking and Internet Architecture · Computer Science 2021-01-29 Shing-Jiuan Liu , Ronald Y. Chang , Feng-Tsun Chien

The field of human activity recognition has evolved significantly, driven largely by advancements in Internet of Things (IoT) device technology, particularly in personal devices. This study investigates the use of ultra-wideband (UWB)…

Machine Learning · Computer Science 2025-09-09 Aurora Polo-Rodríguez , Juan Carlos Valera , Jesús Peral , David Gil , Javier Medina-Quero

Wi-Fi networks are ubiquitous in both home and enterprise environments, serving as a primary medium for Internet access and forming the backbone of modern IoT ecosystems. However, their inherent vulnerabilities, combined with widespread…

Cryptography and Security · Computer Science 2025-10-15 Rayed Suhail Ahmad , Rehan Ahmad , Quamar Niyaz

Aiming at the problem of low accuracy of flight trajectory prediction caused by the high speed of fighters, the diversity of tactical maneuvers, and the transient nature of situational change in close range air combat, this paper proposes…

Machine Learning · Computer Science 2024-05-01 Qinzhi Hao , Jiali Zhang , Tengyu Jing , Wei Wang

Functional near-infrared spectroscopy (fNIRS) is employed as a non-invasive method to monitor functional brain activation by capturing changes in the concentrations of oxygenated haemoglobin (HbO) and deoxygenated haemo-globin (HbR).…

Neuroscientists classify neurons into different types that perform similar computations at different locations in the visual field. Traditional methods for neural system identification do not capitalize on this separation of 'what' and…

Machine Learning · Statistics 2018-01-30 David A. Klindt , Alexander S. Ecker , Thomas Euler , Matthias Bethge

Due to the growing area of ubiquitous mobile applications, indoor localization of smartphones has become an interesting research topic. Most of the current indoor localization systems rely on intensive site survey to achieve high accuracy.…

Networking and Internet Architecture · Computer Science 2018-04-12 Jose Luis V. Carrera , Zhongliang Zhao , Torsten Braun , Haiyong Luo , Fang Zhao

5G networks provide more bandwidth and more complex control to enhance user's experiences, while also requiring a more accurate estimation of the communication channels compared with previous mobile networks. In this paper, we propose a…

Networking and Internet Architecture · Computer Science 2020-08-04 Hao Yin , Xiaojun Guo , Pengyu Liu , Xiaojun Hei , Yayu Gao

Internet of Things (IoT) has become a popular paradigm to fulfil needs of the industry such as asset tracking, resource monitoring and automation. As security mechanisms are often neglected during the deployment of IoT devices, they are…

Cryptography and Security · Computer Science 2022-11-21 Martin Kodys , Zhi Lu , Kar Wai Fok , Vrizlynn L. L. Thing

Indoor localization systems are most commonly based on Received Signal Strength Indicator (RSSI) measurements of either WiFi or Bluetooth-Low-Energy (BLE) beacons. In such systems, the two most common techniques are trilateration and…

Networking and Internet Architecture · Computer Science 2020-06-17 Ramdoot Pydipaty , Johnu George , Krishna Selvaraju , Amit Saha

Knowing how many people occupy a building, and where they are located, is a key component of smart building services. Commercial, industrial and residential buildings often incorporate systems used to determine occupancy. However,…

Artificial Intelligence · Computer Science 2017-11-29 Basheer Qolomany , Ala Al-Fuqaha , Driss Benhaddou , Ajay Gupta

A neural network (NN)-based approach for indoor localization via cellular long-term evolution (LTE) signals is proposed. The approach estimates, from the channel impulse response (CIR), the range between an LTE eNodeB and a receiver. A…

Signal Processing · Electrical Eng. & Systems 2020-12-17 Halim Lee , Ali A. Abdallah , Jongmin Park , Jiwon Seo , Zaher M. Kassas

This paper presents DeepCRF, a new framework that harnesses deep learning to extract subtle micro-signals from channel state information (CSI) measurements, enabling robust and resilient radio-frequency fingerprinting (RFF) of…

Signal Processing · Electrical Eng. & Systems 2024-11-12 Ruiqi Kong , He Chen

The use of neural networks to predict airport passenger activity choices inside the terminal is presented in this paper. Three network architectures are proposed: Feedforward Neural Networks (FNN), Long Short-Term Memory (LSTM) networks,…

Machine Learning · Computer Science 2019-11-01 Federico Orsini , Massimiliano Gastaldi , Luca Mantecchini , Riccardo Rossi

Precise indoor localization is an increasingly demanding requirement for various emerging applications, like Virtual/Augmented reality and personalized advertising. Current indoor environments are equipped with pluralities of WiFi access…

Signal Processing · Electrical Eng. & Systems 2019-11-21 Chenlu Xiang , Shunqing Zhang , Shugong Xu , Xiaojing Chen , George C. Alexandropoulos , Vincent K. N. Lau

Indoor localization is a challenging task. Compared to outdoor environments where GPS is dominant, there is no robust and almost-universal approach. Recently, machine learning (ML) has emerged as the most promising approach for achieving…

Signal Processing · Electrical Eng. & Systems 2023-05-18 Omer Gokalp Serbetci , Ju-Hyung Lee , Daoud Burghal , Andreas F. Molisch

Neural network models have been demonstrated to be capable of achieving remarkable performance in sentence and document modeling. Convolutional neural network (CNN) and recurrent neural network (RNN) are two mainstream architectures for…

Computation and Language · Computer Science 2015-12-01 Chunting Zhou , Chonglin Sun , Zhiyuan Liu , Francis C. M. Lau

This work presents a new approach for detection and exclusion (or de-weighting) of pseudo-range measurements from the Global Navigation Satellite System (GNSS) in order to improve the accuracy of single-epoch positioning, which is an…

Signal Processing · Electrical Eng. & Systems 2023-06-12 Ibrahim Sbeity , Christophe Villien , Christophe Combettes , Benoît Denis , E Veronica Belmega , Marwa Chafii
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