Research Background
MUON DETECTOR
Throughout my gainful undergraduate study, due to my dynamism and immense desire to immerse myself in the research sphere, I commenced my journey as a research assistant and cooperated with the Faculty of Physics of Yazd University in a joint multidisciplinary project. In this project, I designed a hybrid optical/electronic device called Cosmic-Ray Muon Detector. The outcomes of my uninterrupted endeavors as a team member were publishing a conference paper entitled "Monte Carlo Simulation of Handheld Cosmic-Ray Muon Detector" in Persian, published at the 25th IPM Physics Spring Conference, and providing a prototype utilized in the physics laboratory.
​
Muons are secondary particles that can be made when high-energy particles from the solar system (called Cosmic rays), slam into Earth's atmosphere. Muons can penetrate hundreds of meters of solid material before they are absorbed and they can be found everywhere with a flux of roughly one Muon per minute per square centimeter. Muon imaging (Muography) has been considered in a range of applications including archeology, volcanology, and civil engineering.
​
To detect these particles a semi-clear material called Scintillator is required, which generates a couple of photons (scintillation) when muon particles collide with its surface. In this case, a high-sensitive optical detector is needed. To catch these photons we have utilized a high-gain, single-photon sensitive Silicon Photomultipliers (SiPM) with the model "ARRAYC-60035-4P-GEVB" from Onesemi company.
​
As my first research experience, it was intriguing to perceive that my knowledge of electronics and optics, under the assistance of particle physicists, led to the design of a high-tech detector applicable to large-scale geophysical applications. My other attainment was expanding a collaborative work ethic in a scholarly research team. Indeed, I dealt with fragile and advanced equipment, which pushed me to peruse numerous datasheets, articles, and maintenance instructions, enhancing my academic reading and summarizing capabilities. I have also obtained software and hardware skills, including PCB design, analog circuit design, and programming AVR microcontrollers.
VLC-Based Smart Barrier Gate System
Apart from my deep passion for learning new technologies and scientific problems I always pay attention to surrounding challenges in my life and others and try to solve them. I clearly remember those days when I was on the university bus and saw the recognition problem of the RFID-based authorization system at the university entrance, which was annoying when the bus couldn't enter. This has been on my mind for months until I was acquainted with Visible Light Communication (VLC) as an alternative solution for RF-based systems.
We have tried to design a smart system based on VLC, to tackle the mentioned issue, and I chose this specific field of research as my Bachelor’s thesis. As a result of this innovative project, a patent and a journal paper were accepted and published, and also this work is funded by Yazd Science and Technology Park (YSTP). In the proposed system, the vehicle's headlights are utilized to optically transmit the entrance security code (through signal flashing) to the VLC receiver installed on the boom barrier.
​
During the project, I was honored to collaborate with Professor Murat Uysal from Ozyegin University in Turkey who is an outstanding expert in Optical Wireless Communications (OWC). Thanks to his unique academic personality and high-performance expectations, I have learned to be more organized, precise, and punctual, especially in research work.
A Hybrid VLC/RF Parking Automation System
Recently, I have finished an innovative idea that provides a general solution for parking system management and addresses a range of challenges regarding the inefficient use of existing parking spaces. Regarding this idea, we have submitted a patent application (which is under review), and the associated journal paper entitled "A Hybrid VLC/RF PArking Automation System" has been published in IEEE Access Journal. In this research work, we introduced an integrated smart parking automation system, which uses VLC and RF technologies for identification, payment, and indoor localization processes. Furthermore, smartphone, web, and PC-based applications are designed to provide the client-server interface and CPU of the parking lots.
As a full-automated smart system, it contains various analytical and practical aspects including analog and digital designs of the I2V and V2I systems, comprehensive programming in different platforms and their transactions with each other (android, Django, Arduino, and LabVIEW), sensor networking, telecommunications (noise canceling mechanism, modulation,...).
As the first author and head of this project, I have been responsible for writing the paper and designing and implementing most of the mentioned parts. As a result of this, my programming skills along with critical and analytical thinking have developed. Moreover, due to the practical nature of this project, we faced some limitations, especially in accessing some ICs, so I had to improvise some designs and it helped me to be adept at problem-solving.
​
During this project, I got acquainted with Dr. Arash Mohammadi from Concordia University in Canada. He has kindly decided to collaborate with our team with his constructive comments and criticisms. Thanks to his humble and patient personality, I have learned that sharing knowledge, (especially with those who are at lower scientific levels), is as important as learning.
A Review of Analog-Based Bandwidth Enhancement Techniques for High Data Rate VLC Systems
Currently, I am preparing a review paper on analog-based bandwidth enhancement techniques in VLC networks. VLC systems as a complement or an alternative for RF systems, have the potential of being utilized in 5G and 6G networks due to the unlicenced Terahertz bandwidth. To implement high-data rate VLC systems, there is a range of techniques including designing high bandwidth LEDs, using complex modulation schemes, and implementing MIMO systems.
​
Although there exist some survey research works on systems designs for high-speed VLC systems, very little has been reported on analog-based circuit design that improves the system bandwidth. This paper includes Negative Impedance Converters (NICs), Equalization Methods, Peaking, and Pole-Zero Cancellation Methodologies. I believe this paper would help other researchers and engineers who are developing wireless communications systems for 5G/6G standards.