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The Global Navigation Satellite Systems (GNSS) like GPS suffer from accuracy degradation and are almost unavailable in indoor environments. Indoor positioning systems (IPS) based on WiFi signals have been gaining popularity. However, owing…

Signal Processing · Electrical Eng. & Systems 2021-10-22 Pranav Sankhe , Saqib Azim , Sachin Goyal , Tanya Choudhary , Kumar Appaiah , Sukumar Srikant

Classification between different activities in an indoor environment using wireless signals is an emerging technology for various applications, including intrusion detection, patient care, and smart home. Researchers have shown different…

Information Theory · Computer Science 2021-02-10 B. R. Manoj , Guoda Tian , Sara Gunnarsson , Fredrik Tufvesson , Erik G. Larsson

Indoor Positioning System (IPS) is a crucial technology that enables medical staff and hospital managements to accurately locate and track persons or assets inside the medical buildings. Among other technologies, Bluetooth Low Energy (BLE)…

Signal Processing · Electrical Eng. & Systems 2023-10-24 Silvano Cortesi , Marc Dreher , Michele Magno

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

Channel state information (CSI) based fingerprinting for WIFI indoor localization has attracted lots of attention very recently.The frequency diverse and temporally stable CSI better represents the location dependent channel characteristics…

Networking and Internet Architecture · Computer Science 2021-07-06 Zhihui Gao , Yunfan Gao , Sulei Wang , Dan Li , Yuedong Xu

In this paper, we introduce two indoor Wireless Local Area Network (WLAN) positioning methods using augmented sparse recovery algorithms. These schemes render a sparse user's position vector, and in parallel, minimize the distance between…

Networking and Internet Architecture · Computer Science 2016-10-20 Ali Khalajmehrabadi , Nikolaos Gatsis , Daniel Pack , David Akopian

Indoor localization systems that are accurate and robust with respect to propagation channel conditions are still a technical challenge today. In particular, for systems based on range measurements from radio signals, non-line-of-sight…

Emerging Technologies · Computer Science 2013-05-01 Paul Meissner , Erik Leitinger , Markus Fröhle , Klaus Witrisal

With the rapid development of the Internet of Things (IoT), Indoor Positioning System (IPS) has attracted significant interest in academic research. Ultra-Wideband (UWB) is an emerging technology that can be employed for IPS as it offers…

Signal Processing · Electrical Eng. & Systems 2021-08-24 Fuhu Che , Qasim Zeeshan Ahmed , Faheem A. Khan , Pavlos I. Lazaridis

Effective indoor positioning is critical for public safety, enabling first responders to locate at-risk individuals accurately during emergency scenarios. However, traditional Global Navigation Satellite Systems (GNSS) often perform poorly…

Signal Processing · Electrical Eng. & Systems 2025-03-18 Gaurav Duggal , Harish K. Dureppagari , Harpreet S. Dhillon , Jeffrey H. Reed , R. Michael Buehrer

This paper introduces two machine learning optimization algorithms to significantly enhance position estimation in Reconfigurable Intelligent Surface (RIS) aided localization for mobile user equipment in Non-Line-of-Sight conditions.…

Signal Processing · Electrical Eng. & Systems 2024-05-06 Rafael A. Aguiar , Nuno Paulino , Luís M. Pessoa

Indoor navigation is a foundational technology to assist the tracking and localization of humans, autonomous vehicles, drones, and robots in indoor spaces. Due to the lack of penetration of GPS signals in buildings, subterranean locales,…

Machine Learning · Computer Science 2024-08-12 Sudeep Pasricha

As commercial interest in proximity services increased, the development of various wireless localization techniques was promoted. In line with this trend, Ultra-wideband (UWB) is emerging as a promising solution that can realize proximity…

Signal Processing · Electrical Eng. & Systems 2024-02-14 Junyoung Choi , Sagnik Bhattacharya

Recent advancements in Internet of Things (IoTs) have brought about a surge of interest in indoor positioning for the purpose of providing reliable, accurate, and energy-efficient indoor navigation/localization systems. Ultra Wide Band…

Networking and Internet Architecture · Computer Science 2022-06-08 Zohreh Hajiakhondi-Meybodi , Arash Mohammadi , Ming Hou , Konstantinos N. Plataniotis

Among the various Ultra-wideband (UWB) ranging methods, the absence of uplink communication or centralized computation makes downlink time-difference-of-arrival (DL-TDOA) localization the most suitable for large-scale industrial…

Signal Processing · Electrical Eng. & Systems 2024-02-19 Sagnik Bhattacharya , Junyoung Choi , Joohyun Lee

Geographical location solutions have a wide diversity of applications, ranging from emergency services to access to tourist and entertainment services. GPS (Global Positioning System) is the most widely used system for outdoor areas. Since…

Networking and Internet Architecture · Computer Science 2014-02-07 Juan Toloza , Nelson Acosta , Carlos Kornuta

The widespread mobile devices facilitated the emergence of many new applications and services. Among them are location-based services (LBS) that provide services based on user's location. Several techniques have been presented to enable LBS…

Signal Processing · Electrical Eng. & Systems 2018-11-30 Peyman Yazdanian , Vahid Pourahmadi

Indoor localization using deep learning (DL) has demonstrated strong accuracy in mapping Wi-Fi RSS fingerprints to physical locations; however, most existing DL frameworks function as black-box models, offering limited insight into how…

Machine Learning · Computer Science 2025-06-19 Danish Gufran , Sudeep Pasricha

Wireless indoor localization has been a pivotal area of research over the last two decades, becoming a cornerstone for numerous sensing applications. However, conventional wireless localization methods rely on channel state information to…

Signal Processing · Electrical Eng. & Systems 2025-01-31 Xueqiang Han , Tianyue Zheng , Tony Xiao Han , Jun Luo

Radio frequency (RF)-based techniques are widely adopted for indoor localization despite the challenges in extracting sufficient information from measurements. Soft range information (SRI) offers a promising alternative for highly accurate…

Machine Learning · Computer Science 2023-05-24 Yuxiao Li , Santiago Mazuelas , Yuan Shen

It has been shown that the channel state information (CSI) of a Wi-Fi system can be exploited to localize Wi-Fi devices or track trajectory of a moving target. In the existing literature, both sensing tasks are treated separately and some…

Signal Processing · Electrical Eng. & Systems 2026-03-19 Chunxi Chen , Jingwen Zhang , Chao Yu , Fan Liu , Rui Wang