Scholars@Duke
Shekh md mahmudul Islam

Shekh md mahmudul Islam

Postdoctoral Associate
Biomedical Engineering

Scholarly Works - Journal articles

The 2026 global roadmap for textile-integrated wearable technologies in health.

Journal article Physiological measurement · July 2026 Wearable and textile-based technologies are transforming health monitoring by enabling continuous, non-invasive, and context-aware assessment of physiological and biochemical signals in daily life. Advances in flexible electronics, conductive fibers, smart ... Full text Cite

Non-Contact Monitoring and Recognition of Varied Respiratory Patterns From Dual-Subject Across Sleep Postures Using CW Radar

Journal article IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology · March 1, 2026 Objectives: Non-contact and continuous respiratory monitoring is vital for detecting health risks such as sleep apnea, cardiac events, and respiratory disorders. Non-contact methods using Radar offer an unobtrusive solution but face challenges when multipl ... Full text Cite

Noncontact Arterial Pulse Wave Measurement in a Two-Subject Scenario Using Millimeter-Wave Radar

Journal article IEEE Sensors Letters · October 1, 2025 Noncontact radar-based arterial pulse wave measurement in multisubject scenarios with multiple people remains a critical challenge because multiple echoes are received from various body parts of multiple subjects. This letter explores the feasibility of us ... Full text Cite

Building occupancy estimation using single channel CW radar and deep learning.

Journal article Scientific reports · April 2025 Counting the number of people in a room is crucial for optimizing smart buildings, enhancing energy efficiency, and ensuring security while preserving privacy. This study introduces a novel radar-based occupancy estimation method leveraging a 24-GHz Contin ... Full text Cite

A Dual-Radar Noise Compensation System for UAV-Born Cardiopulmonary Vital Signs Detection

Journal article IEEE Transactions on Microwave Theory and Techniques · January 1, 2025 Uncrewed aerial vehicles (UAVs) equipped with Doppler radar for remote life sensing have the potential to offer an effective solution for search and rescue applications. Interference introduced by the moving UAV platform can, however, obscure human vital s ... Full text Cite

Guest Editorial Latest Advances on Radar-Based Physiological Sensors and Their Applications

Journal article IEEE Transactions on Microwave Theory and Techniques · January 1, 2025 Full text Cite

Microwave Doppler Radar Occupancy Sensing for HVAC Energy Savings

Journal article IEEE Journal of Microwaves · January 1, 2024 Buildings consume about 30% of the world's energy, and produce 37% of global energy-related CO2 emissions. Building energy efficiency is becoming even more critical as climate change related events take a toll on human life, and further increase ... Full text Cite

Separation of Heartbeat Waveforms of Simultaneous Two-Subjects Using Independent Component Analysis and Empirical Mode Decomposition

Journal article IEEE Microwave and Wireless Technology Letters · January 1, 2024 Vital sign monitoring using continuous wave (CW) microwave Doppler radar is gaining attention due to its simpler architecture and fewer signal processing chains. Existing literature focuses on utilizing the direction of arrival (DOA) technique of CW radar ... Full text Cite

Noncontact Soil Moisture Estimation Using Continuous Wave Radar and Deep Learning

Journal article IEEE Sensors Journal · January 1, 2024 Estimating soil moisture (SM) using microwave Doppler radar is gaining attention to save fresh water and enhance crop growth and yield in agriculture due to its noncontact form of measurement. Most of the work in the literature focused on utilizing frequen ... Full text Cite

Through the wall human heart beat detection using single channel CW radar

Journal article Frontiers in Physiology · January 1, 2024 Single-channel continuous wave (CW) radar is widely used and has gained popularity due to its simple architecture despite its inability to measure the range and angular location of the target. Its popularity arises in the industry due to the simplicity of ... Full text Cite

Heart Rate Variability-Based Obstructive Sleep Apnea Events Classification Using Microwave Doppler Radar

Journal article IEEE Journal of Electromagnetics RF and Microwaves in Medicine and Biology · December 1, 2023 Obstructive Sleep Apnea (OSA) is the most common type of sleep disorder that consists of multiple episodes of partial or complete closure (apnea, hypopnea) of the upper airway during sleep and underdiagnosed problems as there is no reliable portable in-hom ... Full text Cite

Non‐contact vital signs monitoring in broiler chickens

Journal article The Journal of Engineering · November 2023 AbstractMeasuring the heartbeat and respiration of animals continuously can provide valuable information about their health status. Respiratory‐related diseases are very common in the poultry industry and ... Full text Cite

Cross-Modality Continuous User Authentication and Device Pairing With Respiratory Patterns

Journal article IEEE Internet of Things Journal · August 15, 2023 At-home screening systems for obstructive sleep apnea (OSA) can bring convenience to remote chronic disease management. However, the unsupervised home environment is subject to spoofing and unintentional interference from the household member. To improve r ... Full text Cite

Respiratory Feature Extraction for Contactless Breathing Pattern Recognition Using a Single Digital Camera

Journal article IEEE Transactions on Human Machine Systems · June 1, 2023 Non-contact respiratory monitoring is gaining attention due to its unobtrusive form of measurement. Among all other non-contact sensing modalities, optical sensors integrated with commercial video cameras have received more attention due to their ease of u ... Full text Cite

Building occupancy estimation using microwave Doppler radar and wavelet transform

Journal article Building and Environment · May 15, 2023 Room-level occupancy estimation is a critical input for real estate management, including building utilization optimization, energy-efficient building control, building security, and occupant health and well-being. Knowing how many people are using a room ... Full text Cite

Doppler radar remote sensing of respiratory function.

Journal article Frontiers in physiology · January 2023 Doppler radar remote sensing of torso kinematics can provide an indirect measure of cardiopulmonary function. Motion at the human body surface due to heart and lung activity has been successfully used to characterize such measures as respiratory rate and d ... Full text Cite

Unobtrusive occupancy and vital signs sensing for human building interactive systems.

Journal article Scientific reports · January 2023 Cognitive buildings use data on how occupants respond to the built environment to proactively make occupant-centric adjustments to lighting, temperature, ventilation, and other environmental parameters. However, sensors that unobtrusively and ubiquitously ... Full text Cite

Contactless vital sign monitoring with unmanned aerial vehicle-borne radar

Journal article IEEE Potentials · January 1, 2023 When most people think of drones, they may imagine utilitarian Amazon deliveries or have frightening visions of military assaults. Either way, such technology is finding its way into a variety of fields, where it is reshaping our world. ... Full text Cite

Identity Authentication in Two-Subject Environments Using Microwave Doppler Radar and Machine Learning Classifiers

Journal article IEEE Transactions on Microwave Theory and Techniques · November 1, 2022 Identity authentication based on Doppler radar respiration sensing is gaining attention as it requires neither contact nor line of sight and does not give rise to privacy concerns associated with video imaging. Prior research demonstrating the recognition ... Full text Cite

A Multivariate Statistical Study of Dhaka’s Quality of Life Based on Residents’ Perception

Journal article International Review for Spatial Planning and Sustainable Development · April 15, 2022 Full text Cite

Sleep Posture Recognition with a Dual-Frequency Microwave Doppler Radar and Machine Learning Classifiers

Journal article IEEE Sensors Letters · March 1, 2022 An automated, robust, noncontact sleep posture recognition technique is proposed in this letter, which uses optimizable (Bayesian hyperparameter tuning) machine learning (ML) classifiers applied to dual-frequency (2.4 GHz, 5.8 GHz) monostatic continuous-wa ... Full text Cite

Radar-based remote physiological sensing: Progress, challenges, and opportunities.

Journal article Frontiers in physiology · January 2022 Modern microwave Doppler radar-based physiological sensing is playing an important role in healthcare applications and during the last decade, there has been a significant advancement in this non-contact respiration sensing technology. The advantages of co ... Full text Cite

BreathID: Radar's New Role in Biometrics

Journal article IEEE Aerospace and Electronic Systems Magazine · December 1, 2021 This article is focused on providing some insight into the requirements for a non-contact continuous identity authentication system using radar sensing technologies. This article also discusses the basic principles supporting the potential new role of rada ... Full text Cite

Can Radar Remote Life Sensing Technology Help Combat COVID-19?

Journal article Frontiers in Communications and Networks · January 1, 2021 COVID-19, caused by SARS-CoV-2, is now a global pandemic disease. This outbreak has affected every aspect of life including work, leisure, and interaction with technology. Governments around the world have issued orders for travel bans, social distancing, ... Full text Cite

Sleep posture recognition with a dual-frequency cardiopulmonary doppler radar

Journal article IEEE Access · January 1, 2021 While Doppler radar can be used to measure cardiopulmonary vital signs during sleep, meaningful diagnostic assessments are often subject to knowledge of a subject's changing sleep posture. The torso Effective Radar Cross Section (ERCS) and displacement mag ... Full text Cite

Radar-based non-contact continuous identity authentication

Journal article Remote Sensing · July 1, 2020 Non-contact vital signs monitoring using microwave Doppler radar has shown great promise in healthcare applications. Recently, this unobtrusive form of physiological sensing has also been gaining attention for its potential for continuous identity authenti ... Full text Cite

Concurrent Respiration Monitoring of Multiple Subjects by Phase-Comparison Monopulse Radar Using Independent Component Analysis (ICA) with JADE Algorithm and Direction of Arrival (DOA)

Journal article IEEE Access · January 1, 2020 While non-contact monitoring of human respiration has been demonstrated using Doppler radar, the concurrent monitoring of multiple equidistant subjects remains a significant technological challenge. Reported research has so far been limited to maintaining ... Full text Cite

Optimizing Patient–Ventilator Synchrony Utilizing Radar-Based Respiratory Features for Monitoring COVID-19 Patients

Journal article Frontiers in Communications and Networks · January 1, 2020 During this COVID-19 pandemic time, an unprecedented number of patients with severe respiratory illness require intensive care units (ICUs) under mechanical ventilation (MV) for sustaining life. Patient–ventilator asynchrony (PVA) is very common, and it oc ... Full text Cite

Performances of Multi-Frequency Voltage to Current Converters for Bioimpedance Spectroscopy

Journal article Bangladesh Journal of Medical Physics · April 19, 2013 Breast cancer is one of the most common diseases affecting women and the mortality rate is very high in Bangladesh, mainly due to the lack of early diagnosis. X-ray mammography is not available widely in Bangladesh, besides it has an associated bio ... Full text Cite