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With sleep deprivation being a public health concern, sleep-monitoring technology, mainly through consumer-grade wearables, has shown value among users to better understand their most fundamental measure of health. Unfortunately, utilizing wearable ...

Sub-6GHz radio sensing offers several compelling advantages, such as resilience to poor lighting conditions, privacy preservation, and the ability to see through walls. However, in indoor environments, the sub-6GHz ISM spectrum is heavily occupied by ...

Securely exchanging contact information is essential for establishing trustworthy communication channels that facilitate effective online collaboration. However, current methods are neither user-friendly nor scalable for large groups of users. In ...

Smartphones or similar WiFi-enabled devices regularly discover nearby access points by broadcasting management frames known as probe-requests. Probe-request frames relay, as information, the MAC addresses of sending devices, which act as the ...

Indoor localization using wireless fidelity (WiFi) fingerprint has attracted considerable attention due to its extensive deployment and low cost. Most indoor fingerprint localization methods could be computationally inefficient and behave with ...

• A particle swarm optimized indoor positioning in the online stage is proposed.
• The fitness function is the sum of standard deviations between two fingerprints.
• The testing fingerprint compares with generated one by IDW, not the ...

The increasing number of connected and automated vehicles has led to a sharp increase in the demand for network access of moving vehicles. Although 5G networks support terminals with high mobility, the traffic load is too heavy to bear if all the ...

WiFi-based human sensing has exhibited remarkable potential to analyze user behaviors in a non-intrusive and device-free manner, benefiting applications as diverse as smart homes and healthcare. However, most previous works focus on single-user ...

The practice of people counting serves as an indispensable tool for meticulously monitoring crowd dynamics, enabling informed decision-making in critical situations, and optimizing the management of urban spaces, facilities, and services. Beyond ...

As the global population continues to expand and age 60 and beyond. People's ability to perform routine tasks and physical activity levels decrease with age, which influences their physical and psychological well-being. Proposed research addresses the ...

With the widespread application of WiFi devices, utilizing Channel State Information (CSI) for human activity recognition has garnered significant attention. However, the reliability of WiFi sensing signals is often compromised due to the ...

Proprietary communication technologies for time-critical communication in industrial environments are being gradually replaced by Time-sensitive Networking (TSN)-enabled Ethernet. Furthermore, attempts have been made to bring TSN features into ...

Recent years have witnessed the emerging development of single-antenna wireless respiration detection that can be integrated into IoT devices with a single transceiver chain. However, existing single-antenna-based solutions are all limited by the short ...

In this paper, we propose a tensor-based method for sensing parameter estimation and indoor positioning in WiFi systems. In general, the number of antennas deployed on WiFi sensors is no more than three and the multipath effect is aggravated in indoor ...

In recent years, decimeter-level accuracy in WiFi indoor localization has become attainable within controlled environments. However, existing methods encounter challenges in maintaining robustness in more complex indoor environments: angle-based methods ...

The continuous rise of multimedia entertainment has led to an increased demand for delivering outstanding user experience of multimedia content. However, modelling user-perceived Quality of Experience (QoE) is a challenging task, resulting in efforts for ...

Indoor localization is the process of determining the location of a person or object inside a building. Potential usage of indoor localization includes navigation, personalization, safety and security, and asset tracking. Some of the commonly used ...

In recent years, underground positioning algorithms based on WiFi have received widespread attention. To further improve the speed and accuracy of positioning algorithms, this paper proposes an underground positioning method based on the improved quantum ...

Occupancy detection is vital in optimizing smart building applications, such as automatic heating/cooling, lighting systems, and energy management. Conventional occupancy sensing approaches have limitations, such as inadequate performance with ...

In this paper, we propose a combination of traditional relay and advanced reconfigurable intelligent surfaces (RISs) in an Internet of things (IoT) sensor network. In particular, due to the long-range transmission from IoT sensor to receiver, a ...

In this paper, we are interested in startle reflex detection with WiFi signals. We propose that two parameters related to the received signal bandwidth, maximum normalized bandwidth and bandwidth-intense duration, can successfully detect reflexes and ...