Feasibility of Remote Blood Pressure Estimation via Narrow-band Multi-wavelength Pulse Transit Time
Contact-free sensing gained much traction in the past decade. While remote monitoring of some parameters (heart rate) is approaching clinical levels of precision, others remain challenging (blood pressure). We investigated the feasibility of estimating ...
LiteWiSys: A Lightweight System for WiFi-based Dual-task Action Perception
As two important contents in WiFi-based action perception, detection and recognition require localizing motion regions from the entire temporal sequences and classifying the corresponding categories. Existing approaches, though yielding reasonably ...
TFSemantic: A Time–Frequency Semantic GAN Framework for Imbalanced Classification Using Radio Signals
Recently, wireless sensing techniques have been widely used for Internet of Things (IoT) applications. Unlike traditional device-based sensing, wireless sensing is contactless, pervasive, low cost, and non-invasive, making it highly suitable for relevant ...
TomFi: Small Object Tracking Using Commodity WiFi
Rodent infestation has always been one of the most severe threats to humans, which to solve consumes massive manpower and resources. People usually use traps or poisons to treat rat infestation. Such passive countermeasures are inefficient. Damage often ...
Afitness: Fitness Monitoring on Smart Devices via Acoustic Motion Images
Recently, as fitness has become a popular part of people’s lives, the intention to record fitness processes and assess the standards of fitness movements has grown increasingly keen. However, the existing approaches have some limitations, for example, ...
UltraCLR: Contrastive Representation Learning Framework for Ultrasound-based Sensing
We propose UltraCLR, a new contrastive learning framework that fuses dual modulation ultrasonic sensing signals to enhance gesture representation. Most existing ultrasound-based gesture recognition tasks rely on a large amount of manually labeled samples ...
Efficient Task-driven Video Data Privacy Protection for Smart Camera Surveillance System
As one of the most commonly used AIoT sensors, smart cameras and their supporting services, namely cloud video surveillance (CVS) systems, have brought great convenience to people’s lives. Recent CVS providers use different machine learning techniques to ...
Privacy-Enhanced Cooperative Storage Scheme for Contact-Free Sensory Data in AIoT with Efficient Synchronization
The growing popularity of contact-free smart sensing has contributed to the development of the Artificial Intelligence of Things (AIoT). The contact-free sensory data has great potential to mine and analyze the hidden information for AIoT-enabled ...
Water Salinity Sensing with UAV-Mounted IR-UWB Radar
The quality of surface water is closely related to human’s production and livelihood. Water salinity is one of the key indicators of water quality assessment. Recently, there has been an increased salinization problem of surface water in many regions of ...
Wavoice: An mmWave-Assisted Noise-Resistant Speech Recognition System
As automatic speech recognition evolves, deployment of the voice user interface (VUI) has boomingly expanded. Especially since the COVID-19 pandemic, the VUI has gained more attention in online communication owing to its non-contact property. However, the ...
LightGyro: A Batteryless Orientation Measuring Scheme Based on Light Reflection
In industrial production, the orientation of facility components can indicate whether the facility is on a regular operating track. For example, when a component gets loose, the orientation variation of the component would exceed the normal range. A ...
E-TPE: Efficient Thumbnail-Preserving Encryption for Privacy Protection in Visual Sensor Networks
When visual sensor networks (VSNs) enter daily life in society, they not only bring great convenience but also cause people to worry about privacy. Traditional image encryption uses the snowflake effect to protect the privacy, but this can compromise the ...
mmSign: mmWave-based Few-Shot Online Handwritten Signature Verification
Handwritten signature verification has become one of the most important document authentication methods that are widely used in the financial, legal, and administrative sectors. Compared with offline methods based on static signature images, online ...
AutoDLAR: A Semi-supervised Cross-modal Contact-free Human Activity Recognition System
WiFi-based human activity recognition (HAR) plays an essential role in various applications such as security surveillance, health monitoring, and smart home. Existing HAR methods, though yielding promising performance in indoor scenarios, highly depend on ...
VibHead: An Authentication Scheme for Smart Headsets through Vibration
Recent years have witnessed the fast penetration of Virtual Reality (VR) and Augmented Reality (AR) systems into our daily life, the security and privacy issues of the VR/AR applications have been attracting considerable attention. Most VR/AR systems ...
Wave-CapNet: A Wavelet Neuron-based Wi-Fi Sensing Model for Human Identification
Gait is regarded as a unique feature for identifying people, and gait recognition is the basis of various customized services of the IoT. Unlike traditional techniques for identifying people, the Wi-Fi-based technique is unconstrained by illumination ...
End-to-End Target Liveness Detection via mmWave Radar and Vision Fusion for Autonomous Vehicles
The successful operation of autonomous vehicles hinges on their ability to accurately identify objects in their vicinity, particularly living targets such as bikers and pedestrians. However, visual interference inherent in real-world environments, such as ...
WiVelo: Fine-grained Wi-Fi Walking Velocity Estimation
Passive human tracking using Wi-Fi has been researched broadly in the past decade. Besides straightforward anchor point localization, velocity is another vital sign adopted by the existing approaches to infer user trajectory. However, state-of-the-art Wi-...
A DRL-based Partial Charging Algorithm for Wireless Rechargeable Sensor Networks
Breakthroughs in Wireless Energy Transfer technologies have revitalized Wireless Rechargeable Sensor Networks. However, how to schedule mobile chargers rationally has been quite a tricky problem. Most of the current work does not consider the variability ...
MERA: Meta-Learning Based Runtime Adaptation for Industrial Wireless Sensor-Actuator Networks
IEEE 802.15.4-based industrial wireless sensor-actuator networks (WSANs) have been widely deployed to connect sensors, actuators, and controllers in industrial facilities. Configuring an industrial WSAN to meet the application-specified quality of service ...
A Low-Density Parity-Check Coding Scheme for LoRa Networking
This article presents a novel system, LLDPC,1 which brings Low-Density Parity-Check (LDPC) codes into Long Range (LoRa) networks to improve Forward Error Correction, a task currently managed by less efficient Hamming codes. Three challenges in achieving ...
Optimizing Irrigation Efficiency using Deep Reinforcement Learning in the Field
Agricultural irrigation is a significant contributor to freshwater consumption. However, the current irrigation systems used in the field are not efficient. They rely mainly on soil moisture sensors and the experience of growers but do not account for ...
HCCNet: Hybrid Coupled Cooperative Network for Robust Indoor Localization
Accurate localization of unmanned aerial vehicle (UAV) is critical for navigation in GPS-denied regions, which remains a highly challenging topic in recent research. This article describes a novel approach to multi-sensor hybrid coupled cooperative ...
Energy and QoE Optimization for Mobile Video Streaming with Adaptive Brightness Scaling
Brightness scaling (BS) is an emerging and promising technique with outstanding energy efficiency on mobile video streaming. However, existing BS-based approaches totally neglect the inherent interaction effect between BS factor, video bitrate and ...
