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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

An increasingly important requirement for many novel applications is sensing the positions of people, equipment, etc. GPS technology has proven itself as a successfull technology for positioning in outdoor environments but indoor no…

Networking and Internet Architecture · Computer Science 2010-04-28 Mikkel Baun Kjærgaard

The rise of the Internet of Things (IoT) and mobile internet applications has spurred interest in location-based services (LBS) for commercial, military, and social applications. While the global positioning system (GPS) dominates outdoor…

Machine Learning · Computer Science 2024-02-20 M. W. P. Maduranga

Indoor localization becomes a raising demand in our daily lives. Due to the massive deployment in the indoor environment nowadays, WiFi systems have been applied to high accurate localization recently. Although the traditional model based…

Signal Processing · Electrical Eng. & Systems 2019-02-19 Chenlu Xiang , Zhichao Zhang , Shunqing Zhang , Shugong Xu , Shan Cao , Vincent LAU

Due to the noisy indoor radio propagation channel, Radio Frequency (RF)-based location determination systems usually require a tedious calibration phase to construct an RF fingerprint of the area of interest. This fingerprint varies with…

Networking and Internet Architecture · Computer Science 2016-05-10 Rizanne Elbakly , Moustafa Youssef

Indoor localization systems commonly rely on fingerprinting, which requires extensive survey efforts to obtain location-tagged signal data, limiting their real-world deployability. Recent approaches that attempt to reduce this overhead…

Machine Learning · Computer Science 2025-11-25 Abdelrahman Abdelmotlb , Abdallah Taman , Sherif Mostafa , Moustafa Youssef

In this paper, we fine-tune encoder-only and decoder-only large language models (LLMs) to detect pathologies in IEEE 802.11 networks, commonly known as WiFi. Our approach involves manually crafting prompts followed by fine-tuning.…

Signal Processing · Electrical Eng. & Systems 2025-06-10 Forough Shirin Abkenar

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

WiFi fingerprint-based indoor localization schemes deliver highly accurate location data by matching the received signal strength indicator (RSSI) with an offline database using machine learning (ML) or deep learning (DL) models. However,…

Cryptography and Security · Computer Science 2025-10-09 Fariha Tanjim Shifat , Sayma Sarwar Ela , Mosarrat Jahan

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

This paper details a number of indoor localization techniques developed for real-time monitoring of older adults. These were developed within the framework of the i-Light research project that was funded by the European Union. The project…

Computers and Society · Computer Science 2020-09-04 Iuliana Marin , Maria-Iuliana Bocicor , Arthur-Jozsef Molnar

Human localization is gaining momentum in security, healthcare, logistics, and smart spaces applications. While global navigation systems are unreliable indoor, device-free (a.k.a. passive) localization methods that exploit human-induced…

Signal Processing · Electrical Eng. & Systems 2026-05-07 Federica Fieramosca , Anastasia Maiolli , Alexander H. Paulus , Stefano Savazzi , Michele D'Amico

WiFi fingerprint-based indoor localization has been widely studied, but most existing approaches focus on absolute positioning and rely on dense coordinate annotations, which are costly to obtain at scale. In this paper, we study a…

Signal Processing · Electrical Eng. & Systems 2026-05-19 Tzu-Ti Wei , Po-Cheng Chen , Yu-Chee Tseng , Jen-Jee Chen

Accurate and robust indoor localization is critical for smart building applications, yet existing Wi-Fi-based systems are often vulnerable to environmental conditions. This work presents a novel indoor localization system, called LiGen,…

Robotics · Computer Science 2025-10-31 Jie Lin , Hsun-Yu Lee , Ho-Ming Li , Fang-Jing Wu

Global localization is essential for autonomous robotics, especially in indoor environments where the GPS signal is denied. We propose a novel WiFi-based localization framework that leverages ubiquitous wireless infrastructure and the…

Robotics · Computer Science 2025-08-15 Xu Ma , Jiajie Zhang , Fujing Xie , Sören Schwertfeger

The ubiquitous presence of WiFi access points and mobile devices capable of measuring WiFi signal strengths allow for real-world applications in indoor localization and mapping. In particular, no additional infrastructure is required.…

Networking and Internet Architecture · Computer Science 2021-06-21 Bastian Schaefermeier , Gerd Stumme , Tom Hanika

Using WiFi signals for indoor localization is the main localization modality of the existing personal indoor localization systems operating on mobile devices. WiFi fingerprinting is also used for mobile robots, as WiFi signals are usually…

Robotics · Computer Science 2017-05-01 Michał Nowicki , Jan Wietrzykowski

We address the indoor localization problem, where the goal is to predict user's trajectory from the data collected by their smartphone, using inertial sensors such as accelerometer, gyroscope and magnetometer, as well as other environment…

Machine Learning · Computer Science 2020-11-24 Leonid Antsfeld , Boris Chidlovskii , Emilio Sansano-Sansano

This paper explores the data cleaning challenges that arise in using WiFi connectivity data to locate users to semantic indoor locations such as buildings, regions, rooms. WiFi connectivity data consists of sporadic connections between…

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…

Signal Processing · Electrical Eng. & Systems 2024-08-28 Rafail Ismayilov , Renato L. G. Cavalcante , Slawomir Stanczak