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Indoor human activity recognition (HAR) explores the correlation between human body movements and the reflected WiFi signals to classify different activities. By analyzing WiFi signal patterns, especially the dynamics of channel state…

Signal Processing · Electrical Eng. & Systems 2020-04-24 Parisa Fard Moshiri , Hojjat Navidan , Reza Shahbazian , Seyed Ali Ghorashi , David Windridge

Traditional global positioning systems often underperform indoors, whereas Wi-Fi has become an effective medium for various radio sensing services. Specifically, utilizing channel state information (CSI) from Wi-Fi networks provides a…

Signal Processing · Electrical Eng. & Systems 2024-12-04 Pei Tang , Jingtao Guo , Ivan Wang-Hei Ho

We introduce WiCluster, a new machine learning (ML) approach for passive indoor positioning using radio frequency (RF) channel state information (CSI). WiCluster can predict both a zone-level position and a precise 2D or 3D position,…

Networking and Internet Architecture · Computer Science 2021-09-28 Ilia Karmanov , Farhad G. Zanjani , Simone Merlin , Ishaque Kadampot , Daniel Dijkman

Gait is a person's natural walking style and a complex biological process that is unique to each person. Recently, the channel state information (CSI) of WiFi devices have been exploited to capture human gait biometrics for user…

Machine Learning · Computer Science 2019-02-07 Kalvik Jakkala , Arupjyoti Bhuya , Zhi Sun , Pu Wang , Zhuo Cheng

The rapid increase in utilization of smart home technologies has introduced new paradigms to ensure the security and privacy of inhabitants. In this study, we propose a novel approach to detect and localize physical intrusions in indoor…

Signal Processing · Electrical Eng. & Systems 2025-11-05 Usama Shakoor , Muhammad Bilal Janjua , Muhammad Sohaib J. Solaija , Huseyin Arslan

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

Machine learning techniques have shown remarkable accuracy in localization tasks, but their dependency on vast amounts of labeled data, particularly Channel State Information (CSI) and corresponding coordinates, remains a bottleneck.…

Signal Processing · Electrical Eng. & Systems 2024-04-25 Ankan Dash , Jingyi Gu , Guiling Wang , Nirwan Ansari

Wireless localization for mobile device has attracted more and more interests by increasing the demand for location based services. Fingerprint-based localization is promising, especially in non-Line-of-Sight (NLoS) or rich scattering…

Signal Processing · Electrical Eng. & Systems 2019-07-02 Heng Zhang , Zhichao Zhang , Shunqing Zhang , Shugong Xu , Shan Cao

Person Re-identification is defined as a recognizing process where the person is observed by non-overlapping cameras at different places. In the last decade, the rise in the applications and importance of Person Re-identification for…

Computer Vision and Pattern Recognition · Computer Science 2020-08-24 Sajad Amouei Sheshkal , Kazim Fouladi-Ghaleh , Hossein Aghababa

Localization services for wireless devices play an increasingly important role in our daily lives and a plethora of emerging services and applications already rely on precise position information. Widely used on-device positioning methods,…

Signal Processing · Electrical Eng. & Systems 2024-01-17 Pengzhi Huang , Emre Gönültaş , Maximilian Arnold , K. Pavan Srinath , Jakob Hoydis , Christoph Studer

With the ongoing development of Indoor Location-Based Services, the location information of users in indoor environments has been a challenging issue in recent years. Due to the widespread use of WiFi networks, WiFi fingerprinting has…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-06-05 Amin Kargar-Barzi , Ebrahim Farahmand , Nooshin Taheri Chatrudi , Ali Mahani , Muhammad Shafique

The training of neural networks requires tedious and often manual tuning of the network architecture. We propose a systematic approach to inserting new layers during the training process. Our method eliminates the need to choose a fixed…

Machine Learning · Computer Science 2025-06-18 Leonie Kreis , Evelyn Herberg , Frederik Köhne , Anton Schiela , Roland Herzog

Multiple-input multiple-output (MIMO) is an enabling technology to meet the growing demand for faster and more reliable communications in wireless networks with a large number of terminals, but it can also be applied for position estimation…

Signal Processing · Electrical Eng. & Systems 2021-08-06 Gregor Cerar , Aleš Švigelj , Mihael Mohorčič , Carolina Fortuna , Tomaž Javornik

Due to the indoor none-line-of-sight (NLoS) propagation and multi-access interference (MAI), it is a great challenge to achieve centimeter-level positioning accuracy in indoor scenarios. However, the sixth generation (6G) wireless…

Signal Processing · Electrical Eng. & Systems 2022-08-23 Yang Wu , Yinghua Wang , Jie Huang , Cheng-Xiang Wang , Chen Huang

Indoor localization plays a vital role in the era of the IoT and robotics, with WiFi technology being a prominent choice due to its ubiquity. We present a method for creating WiFi fingerprinting datasets to enhance indoor localization…

Thomson scattering (TS) diagnostics provide reliable, minimally perturbative measurements of fundamental plasma parameters, such as electron density ($n_e$) and electron temperature ($T_e$). Deep neural networks can provide accurate…

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

Recent channel state information (CSI)-based positioning pipelines rely on deep neural networks (DNNs) in order to learn a mapping from estimated CSI to position. Since real-world communication transceivers suffer from hardware impairments,…

Information Theory · Computer Science 2021-12-01 Emre Gönültaş , Sueda Taner , Howard Huang , Christoph Studer

Network traffic is growing at an outpaced speed globally. The modern network infrastructure makes classic network intrusion detection methods inefficient to classify an inflow of vast network traffic. This paper aims to present a modern…

Machine Learning · Computer Science 2021-01-05 Harsh Dhillon , Anwar Haque

Deep neural networks (DNNs) have become a popular approach for wireless localization based on channel state information (CSI). A common practice is to use the raw CSI in the input and allow the network to learn relevant channel…

Signal Processing · Electrical Eng. & Systems 2022-12-07 Artan Salihu , Stefan Schwarz , Markus Rupp