
Qammer AbbasiUniversity of Glasgow | UofG · Division of Electronics and Electrical Engineering
Qammer Abbasi
PhD, SMIEEE, FEAI
About
816
Publications
204,551
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
10,442
Citations
Introduction
Additional affiliations
Education
December 2008 - December 2011
Publications
Publications (816)
This paper introduces a novel reflective metasurface for efficient polarization conversion in the X, Ku, and K bands. Through rigorous simulations and experimental validation, high polarization conversion ratios (PCR) exceeding 90% were achieved, even at incidence angles up to \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym}...
This study presents a machine learning (ML)–based localization method for improving location estimation accuracy in wireless networks, especially in challenging environments where traditional techniques often fall short. Conventional methods rely on a limited number of multipath components (MPCs), leading to inaccurate localization in complex envir...
Compared to broader physical activities, detecting nuanced respiratory movements poses a significant challenge in indoor health monitoring systems. While respiratory activity can be conceptualized as periodic chest movements akin to mechanical vibrations, uncontrollable environmental factors often introduce noise into detected radar signals. The cl...
In the era of the Internet of Things (IoT), the transmission of medical reports in the form of scan images for collaborative diagnosis is vital for any telemedicine network. In this context, ensuring secure transmission and communication is necessary to protect medical data to maintain privacy. To address such privacy concerns and secure medical im...
Objective. We study the changes in morphology of the photoplethysmography (PPG) signals–acquired from a select group of South Asian origin–through a low-cost PPG sensor, and correlate it with healthy aging which allows us to reliably estimate the vascular age and chronological age of a healthy person as well as the age group he/she belongs to. Meth...
In recent years, Lip-reading has emerged as a significant research challenge. The aim is to recognise speech by analysing Lip movements. The majority of Lip-reading technologies are based on cameras and wearable devices. However, these technologies have well-known occlusion and ambient lighting limitations, privacy concerns as well as wearable devi...
This paper presents a single-element linearly polarized (LP) patch antenna characterized by a wide impedance bandwidth and low profile, optimized for 5G V2X applications. By inserting air gaps into the LP patch antenna structure, a circularly polarized (CP) antenna is generated. Moreover, a cross-stubs technique is employed to generate CP from LP,...
In the paper [1], following corrections should be made: 1. Figure Caption Corrections: Fig. 1. This illustration reveals (a) noninvasive monitoring of blood SpO2 as illustrated in [49, Fig. 4] and (b) HR using the MAX30102 sensor through photoplethysmography [50]. Fig. 3. Process Flowchart - Device Design with MAX-30102, MLX90614, ESP32 and Display...
Objective: Contactless detection and classification of abnormal respiratory patterns is challenging, especially in multi-person scenarios. While Software-Defined Radio (SDR) systems have shown promise in capturing subtle respiratory movements, the presence of multiple people introduces interference and complexity, making it difficult to distinguish...
Automatic analysis of facial expressions has emerged as a prominent research area in the past decade. Facial expressions serve as crucial indicators for understanding human behavior, enabling the identification and assessment of positive and negative emotions. Moreover, facial expressions provide insights into various aspects of mental activities,...
Contactless vital signs detection has the potential to advance healthcare by offering precise and convenient patient monitoring. This groundbreaking approach not only streamlines the monitoring process, but also allows continuous, real-time assessment of vital signs, allowing early detection of anomalies and prompt intervention. This paper presents...
The multiband, multifunctional chiral metasurface with asymmetric transmission exhibits significant potential for diverse applications in modern communication systems, ranging from enhanced signal modulation and polarization control to advanced beam steering and compact antenna design. This research presents a versatile and advanced chiral metasurf...
Abstract-A single-layered, series-fed monopulse planar array antenna system is presented which reduces the complexity of corporate-fed monopulse antennas in terms of multi-layered structures and number of 180° ring hybrid couplers as monopulse comparator circuit. The proposed antenna exploits only two 3dB/180° hybrid couplers that results in reduce...
Antennas are shifting with the Internet of Everything (IoE), 6G Joint Sensing and Communication (JSAC), and Wireless Power Transfer (WPT) paradigms into multifunctional devices, that provide more functionality than simply transmitting and receiving communication signals. Thus, antennas or RF-enabled devices
[1]
, emerged as a class of IoE systems...
Background
The number of individuals living with multiple (≥2) long term conditions (MLTCs) is a growing global challenge. People with MLTCs experience reduced life expectancy, complex healthcare needs, higher healthcare utilisation, increased burden of treatment, poorer quality of life and higher mortality. Evolving technologies including artifici...
The multiband, multifunctional chiral metasurface with asymmetric transmission exhibits significant potential for diverse applications in modern communication systems, ranging from enhanced signal modulation and polarization control to advanced beam steering and compact antenna design. This research presents a versatile and advanced chiral metasurf...
Current approaches to activity-assisted living (AAL) are complex, expensive, and intrusive, which reduces their practicality and end user acceptance. However, emerging technologies such as artificial intelligence and wireless communications offer new opportunities to enhance AAL systems. These improvements could potentially lower healthcare costs a...
This paper investigates location-based adaptive beamforming techniques, including Maximum Ratio Transmission (MRT) and Zero Forcing (ZF), in complex wireless environments. The study leverages a digital twin simulation of the University of Glasgow campus to evaluate the proposed schemes under realistic conditions, such as user mobility and multipath...
This paper introduces an advanced vital sign monitoring system that seamlessly integrates sensor technology, wireless communication and machine learning algorithms to enhance patient care. The system accurately records and interprets vital physiological metrics such as oxygen saturation (SpO2), heart rate, and body temperature. The integration form...
Linear polarization (LP) and circular polarization (CP) holds paramount importance in Ku, K, and Ka bands for satellite based communication, and remote sensing applications. Satellite based remote sensing applications face challenges like atmospheric attenuation, noise & interference, and signal degradation. Moreover, satellite based communication...
The integration of Open Radio Access Network (Open RAN) with Reconfigurable Intelligent Surfaces (RIS) presents a transformative approach to enhancing robotic surgery. This proposal explores the potential of combining Open RAN's flexible, software-defined architecture with RIS's ability to dynamically control electromagnetic waves, thereby improvin...
Vital signs are important indicators to evaluate the health status of patients. Channel state information (CSI) can sense the displacement of the chest wall caused by cardiorespiratory activity in a non-contact manner. Due to the influence of clutter, DC components, and respiratory harmonics, it is difficult to detect reliable heartbeat signals. To...
Terahertz (THz) spectral region from 0.1 to 3 THz is envisaged to hold immense potential in the next generation of wireless technologies. Recently, research has focused on this terahertz gap, because of its unprecedented channel capacities. At the physical layer, the design complexities and fabrication of THz devices, especially antennas are the pr...
This work presents a radio frequency identification (RFID)-based technique to detect falls in the elderly. The proposed RFID-based approach offers a practical and efficient alternative to wearables, which can be uncomfortable to wear and may negatively impact user experience. The system utilises strategically positioned passive ultra-high frequency...
This work addresses resource allocation challenges in multi-cell wireless systems catering to enhanced Mobile Broadband (eMBB) and Ultra-Reliable Low Latency Communications (URLLC) users. We present a distributed learning framework tailored to O-RAN network architectures. Leveraging a Thompson sampling-based Deep Reinforcement Learning (DRL) algori...
Deforestation poses a significant global environmental challenge with far-reaching consequences for biodiversity, climate change, and livelihoods. In this context, applying advanced technologies such as the Internet of Things (IoT) and Artificial Intelligence (AI) holds immense promise. This paper aims to comprehensively review and analyze the role...
In the field of smart healthcare, wearable and sensing devices are connected to the Internet of Things (IoT) to assess patients within their own homes. Fatigue is a multidimensional experience that can be characterised by exhaustion and reduced physical performance. Monitoring people within their homes to detect slower pace could be a promising met...
This paper presents a comprehensive methodology for generating a dataset for localization experiments in a controlled environment. We utilized a Universal Software Radio Peripheral (USRP) with LabVIEW for signal transmission and an Unmanned Ground Vehicle(UGV) equipped with a receiving antenna and OptiTrack cameras to establish ground truth in a 3×...
Breathing pattern is a representation of human breathing in the rate, depth, and rhythm, which can reflect physical and mental health conditions. Capturing and identifying abnormal breathing patterns can help localize associated disorders and have important implications for the patient or the potential patient. In this paper, a breathing patterns r...
Efficient utilisation of scarce resources, mainly radio and power, are the key research issues in the future Internet of Things (IoT) networks. This paper proposes an ambient energy harvesting and backscatter-enabled, energy-constrained cognitive IoT network. In our proposed scheme, the nodes in the secondary network efficiently utilise the primary...
Reconfigurable Intelligent Surfaces have recently emerged as a revolutionary next-generation wireless networks paradigm that harnesses engineered electromagnetic environments to reshape radio wave propagation. Pioneering research presented in this article establishes the viability of Reconfigurable Intelligent Surfaces-enhanced indoor localisation...
This paper is the first to present a novel, non-contact method that utilizes orthogonal frequency division multiplexing (OFDM) signals (of frequency 5.23 GHz, emitted by a software defined radio) to radio-expose the pulmonary patients in order to differentiate between five prevalent respiratory diseases, i.e., Asthma, Chronic obstructive pulmonary...
In this paper, the impact of dielectric substrate, feed connectors, and fabrication tolerances on the performance of planar microstrip mmWave antenna arrays is elucidated. Three similar prototypes of an 8-element wideband series-fed microstrip array, covering the entire 57–71 GHz ISM band, are designed by using three dielectric substrates (RO3003,...
We present the first-ever design of a digitally coded
Dynamic Metasurface Antenna (DMA) at 60 GHz millimeterwave
(mmWave) band. First, a novel fully addressable
complementary electric inductive-capacitive (CELC)
metamaterial element is designed and embedded with PIN diodes
for 1-bit control. Then 16-element 1-D DMA array is designed to
synthesize a...
Due to the growing demand for wireless spectrum, the rapid development of a new generation of joint communication sensing systems (JCAS) has been promoted. This integration technology can make more efficient use of spectrum and hardware resources. Based on the increasing demand for high data rates and accurate environmental perception, in this pape...
This study represents a significant advancement in Sign Language Detection (SLD), a crucial tool for enhancing communication and fostering inclusivity among the hearing-impaired community. It innovatively combines radar technology with deep learning techniques to develop a sophisticated, non-invasive SLD system. Traditional SLD methods often rely o...
In recent years, gesture recognition system based on radio frequency (RF) sensing has a wide application prospect and attraction in non-contact electronic interaction with its advantages of privacy security, lighting independence, and wide sensing range. The traditional RF sensing system depends on the environment and the subject, and the multi-cha...
Intelligent transportation systems are pivotal in enhancing road safety by enabling intra-vehicle communication. Due to the nature of the wireless communication link, several potential risks of attacks exist, including impersonation, modification, and replay. To ensure the security of vehicular ad hoc networks (VANETs) against malicious activities,...
In this paper, for the first time we present the complete design of a dynamic metasurface antenna (DMA) array at the 60 GHz millimeter-wave (mmWave) industrial, scientific, and medical (ISM) band. First, a novel complementary electric inductive-capacitive (CELC) metamaterial element (unlike conventional rectangular CELC) is designed to resonate aro...
The simulation demonstrates the process of contextual beamforming in an urban environment. Data was collected through a simulation using Remcom Wireless InSite 3.3.0, utilizing a profile of the city of Rosslyn, Virginia. The scenario involved a moving vehicle communicating with 3 cellular base stations (BSs) at different heights and offsets. Data i...