A5000221801- Antenna Design and Analysis
- Energy Harvesting in Wireless Networks
- Photoacoustic and Ultrasonic Imaging
- Sparse and Compressive Sensing Techniques
- Advanced Fluorescence Microscopy Techniques
- Blind Source Separation Techniques
- Antenna Design and Optimization
- Advanced Data Compression Techniques
- Optical Imaging and Spectroscopy Techniques
- Radio Frequency Integrated Circuit Design
- Advanced Antenna and Metasurface Technologies
- Speech and Audio Processing
- Electromagnetic Compatibility and Noise Suppression
- Spaceflight effects on biology
- Advanced Adaptive Filtering Techniques
- Migration, Aging, and Tourism Studies
- Advanced Image Processing Techniques
- Analog and Mixed-Signal Circuit Design
- Microwave Engineering and Waveguides
- Advanced DC-DC Converters
- Quantum-Dot Cellular Automata
- Image and Signal Denoising Methods
- Embedded Systems Design Techniques
- Advanced MIMO Systems Optimization
- Metamaterials and Metasurfaces Applications
Malta College of Arts, Science and Technology
2017-2023
University of Cambridge
2018-2021
University of Malta
2008-2011
The three-dimensional imaging of mesoscopic samples with Optical Projection Tomography (OPT) has become a powerful tool for biomedical phenotyping studies. OPT uses visible light to visualize the 3D morphology large transparent samples. To enable wider application OPT, we present OptiJ, low-cost, fully open-source system capable specimens up 13 mm tall and 8 deep 50 µm resolution. OptiJ is based on off-the-shelf, easy-to-assemble optical components an ImageJ plugin library data...
Adaptive block-based compressive sensing (ABCS) algorithms are studied in the context of practical realization on resource-constrained image and video platforms that use single-pixel cameras, multi-pixel cameras or focal plane processing sensors. In this paper, we introduce two novel ABCS suitable for compressively images intra-coded frames. Both deterministic 2D-DCT dictionaries when instead random dictionaries. The first uses a low number measurements to compute block boundary variation...
The latest and next generation mobile radio terminals require access to different wireless networks that operate on frequency bands. Additionally requirements such as a varying asymmetric data rate are needed for the efficient transmission of multimedia services. To effectively need either single ultra wideband antenna spans all useful frequencies, or an can be tuned required relatively narrow bands when desirable. In this paper low-profile tunable microstrip structure using switched...
Modern power electronic circuits typically require an on-board microcontroller to carry out necessary sensor measurements and controlled semiconductor switching. Hence, in the prototyping stage it is convenient have a development board designed for noise immunity best electromagnetic compatibility possible. Typical boards provided by manufacturers are not such specification due cost considerations. This paper presents design of improved STM32F4 better performance switching converter circuits.
An electrically small tunable antenna for use in mobile terminals is designed. The size of the achieved by multiple shorting posts and varactor diodes. Multiple are used to allow a greater freedom placement probe feed. Two diodes placed line with further decrease antenna. can be tuned over range from 0.55GHz 1.5GHz. However has gain at lower frequencies due its size.
In this paper the design of a single feed antenna that can be tuned to frequency in range 450 MHz 2.2 GHz is discussed. A reconfigurable patch structure proposed and tuning performed by switching out coplanar patches, shorting posts varying voltage across varactor diode. The quantity interest terms particular input impedance or reflection coefficient. advantages shortcomings associated with as well possibility implementing current emerging enabling technologies (5 pages)
Reconfigurable pixel antennas require algorithms that can change the to match specifications in real time with minimum number of switch operations. To address this problem, an algorithm combines a search method, approximate qualitative antenna model and measurements is proposed. The based on shape grammar relates its electromagnetic properties, are substituted by accurate numerical model. Results demonstrate goes through small iterations converge properties required.
The three-dimensional imaging of mesoscopic samples with Optical Projection Tomography (OPT) has become a powerful tool for biomedical phenotyping studies. OPT uses visible light to visualize the 3D morphology large transparent samples. To enable wider application OPT, we present OptiJ, low-cost, fully open-source system capable specimens up 13 mm tall and 8 deep 50 μm resolution. OptiJ is based on off-the-shelf, easy-to-assemble optical components an ImageJ plugin library data...
This paper describes a method using the planar circuit technique together with Generalized Cavity Model (GCM) and segmentation/desegmentation methods to calculate resonant frequency input reflection coefficient of pixel patch antenna. Tree graph representations are developed represent antenna reduce network connected ports. The segmentation in conjunction multiport connection is used find impedance Compared full-wave solvers, this model computationally much faster its accuracy adequate for...
Due to the rapid evolution in wireless systems, multiple frequency bands arebeing utilized. Portable devices must be able interface with these and,ideally, adapt new protocols. There is need develop novel antenna techniqueswhich allow tuned different ranges, ideally access whole spectrum.The pixel patch a good candidate for this type of design. Each can beindividually switched on or off thereby changing shape and increasingthe overall flexibility. However, design poses challenges interms...
This paper shall present the effectiveness of a black box model to estimate azimuth angle sound source using two microphones. Two electret microphones are placed at ear positions polystyrene dummy head with human-like ear-to-ear separation. The interaural time difference (ITD) and level (ILD) cues that used for binaural localisation together frequency content source. structure proposed is Sugeno type fuzzy inference system (FIS). selected FIS adaptively tuned by presenting it training data...
This paper describes the design and development of a cost-affordable yet powerful software-defined radio system. The main application environment board is in academia where it used to deliver multidisciplinary approach number fundamental engineering topics communications. A moderately fast ADC together with an audio DAC are for analog components while off-the-shelf FPGA as digital processing element. To demonstrate boards capabilities, hardware blocks demodulate amplitude modulation were developed.
Video block compressive sensing has been studied for use in resource constrained scenarios, such as wireless sensor networks, but the approach still suffers from low performance and long reconstruction time. Inspired by classical distributed video coding, we design a lightweight encoder with computationally intensive operations, frame interpolation, performed at decoder. Straying recent trends training end-to-end neural propose two algorithms that leverage convolutional network components to...