A5088133303- Non-Invasive Vital Sign Monitoring
- ECG Monitoring and Analysis
- Heart Rate Variability and Autonomic Control
- Ultra-Wideband Communications Technology
- Hemodynamic Monitoring and Therapy
- Optical Imaging and Spectroscopy Techniques
- Radar Systems and Signal Processing
- Antenna Design and Analysis
- Radio Wave Propagation Studies
- Gyrotron and Vacuum Electronics Research
- Microwave Engineering and Waveguides
- Indoor and Outdoor Localization Technologies
- Millimeter-Wave Propagation and Modeling
- Microwave Imaging and Scattering Analysis
- Traumatic Ocular and Foreign Body Injuries
- Bluetooth and Wireless Communication Technologies
- Speech and Audio Processing
- Image and Signal Denoising Methods
- Geophysical Methods and Applications
- COVID-19 diagnosis using AI
- Energy Harvesting in Wireless Networks
- Radio Frequency Integrated Circuit Design
University of Tennessee at Knoxville
2018-2025
Knoxville College
2023-2025
United States Naval Research Laboratory
2021
Remote non-contact monitoring of human vital signs has recently received lots attention due to the advancement and availability millimeter wave (mmWave) radars. These sensors are significantly reduced in size, but still face serious electromagnetic (EM) propagation loss signal obstructions resulting lower signal-to-noise ratios (SNR). As mmWave signals also have higher sensitivity body motions, these effects typically degrade accuracy heart rate (HR) detection. To overcome this challenge,...
This paper establishes the practicality of terrestrial microwave power beaming at distances >1 km. To beam along surface earth, it is necessary to consider and, where possible, exploit effects propagation across terrain. Key design considerations include effect scattering from topography, approaches for characterizing in presence multipath, safety, and efficiency. A rapid demonstration US Army Research Field Blossom Point, MD, delivers 1.6 kW electrical a 1046 m standoff 5.4-m-diameter X...
In this paper, accurate real-time heart rate tracking for multiple subjects is explored. A signal processing scheme implemented using a 60GHz, small form factor FMCW radar and compact unit presented. Improvements in target discrimination heartbeat signal-to-noise ratio (SNR) are demonstrated utilizing the MIMO capabilities of radar. For discrimination, direction arrival algorithms used to automatically detect number given scene, as well their precise angular location relative Subsequently,...
A rigid air-filled cavity backed UWB spiral antenna for GPR applications is designed, simulated, and measured. The fabricated physically big planar accurately cut out of a thick aluminum sheet using an abrasive water jet machine. It fed by mechanically firm balun feed that avoids the weak interconnection between balun. operates from 750 MHz – 1.25 GHz maintains better than 12dB return loss greater 6 dB peak gain over range. also keeps axial ratio less 4 operating frequency
In this paper the development of a wideband high-power 16-way X-Band all-waveguide radial divider/combiner is presented. The combiner comprised four parts: coaxial feed, center conical line, peripheral waveguide ports, and coaxial-to-waveguide transition. Use tapered feed essential to provide wide bandwidth handling capability. A 3D printed prototype structure was built tested validate CST model, before being manufactured using CNC machine. measured standard deviation amplitude phase...
With the increased concern over contact-transmitted diseases and rapid growth in field of telemedicine, it is critical to develop remote diagnostic systems meet these needs. In this paper, multiple methods vital sign estimation are explored combined form a multi-functional health monitoring system. Camera-based utilized estimate patient heart rate, blood pressure, SpO2, temperature under assumption adequate lighting. Similarly, radar-based used as more robust method respiration rate. These...
The paper presents a comprehensive approach using radar technology for non-contact vital sign monitoring, focusing on multi-subject scenarios. By leveraging Multiple Input, Output (MIMO) configuration with Direction of Arrival (DoA) methods, along digital beamforming, the Generalized Sidelobe Canceller, and frequency tracing technique, study achieves impressive accuracy mean absolute error less than 3 BPM, even in challenging situations. This radar-based monitoring shows promising prospects...
Extracting accurate heart rate estimates of human subjects from a distance in high-noise scenarios using radar is common problem. Often, frequency components sources such as movement and vital signs other can overpower the weak reflected signal heart. In this study, we propose processing scheme an Adaptive Multi-Trace Carving algorithm (AMTC) to accurately detect over time non-ideal mm-wave radar. our initial proof-of-concept results, show low estimation mean absolute error (MAE) 3bpm for...
In this paper, a solution for automatic MIMO radar channel selection utilizing convolutional neural networks is presented the task of advancing robust remote heart rate monitoring. A millimeter-wave with high number transmit-receive channels used to help mitigate effects random body swaying motions through advanced signal processing. It shown here that deep learning methods can classify as either good or bad by features time-frequency representations corresponding phase variation signals....