Dr. Mohammad S. Obaidat Professor, Department of Computer Science Monmouth University W. Long Branch, NJ 07764 Phone: (908) 571-4482 Fax: (908) 263-5202 Email: obaidat@monmouth.edu
Professor Obaidat is an internationally known academic/researcher/ scientist. He received his Ph.D. and M. S. degrees in Computer Engineering from Ohio State University. He is currently a tenured full Professor of Computer Science at Monmouth University (MU), NJ. Among his previous positions are Chair of Computer Science Department and Director of Graduate Program at MU and a faculty member at CUNY. He has received extensive research funding and published about three hundred (300) refereed articles in scholarly international journals and proceedings of international conferences. He is author/co-author of five books including the best selling book, Wireless Networks (Wiley 2003). Professor Obaidat has served as a consultant for several corporations/organizations worldwide. He is the chief editor of International Journal of Communication Systems. He is also an Editor of Simulation: Transactions of Society for Modeling and Simulation International (SCS). Obaidat is an associate editor/ editorial board member of eight other refereed scholarly journals including two IEEE Transactions. He has guest edited many special issues of scholarly journals. Obaidat has served as the steering committee chair, general chair, or program chair of many international conferences. He is the founder of the known SPECTS International conference. Obaidat has received a recognition certificate from IEEE.
Between 1994-1997, Obaidat served as distinguished speaker/visitor of IEEE Computer Society. Since 1995 he has served as an ACM distinguished lecturer. Between 1996-1999, he served as program evaluator of CSAB/CSAC. Between 2002-2004, he served as the Vice President of Conferences of SCS. Since 2004, Dr. Obaidat has served as Vice President of Membership of SCS. He has been invited to lecture and give keynote speeches worldwide. His research interests include: wireless networks, performance evaluation, modeling and simulation, telecommunications and computer networking, and information security. He has served as the scientific advisor for World Bank/UNDP Workshop on Fostering Digital Inclusion. Recently, he has been awarded a Nokia Research Fellowship and Fulbright Scholar Award. Prof. Obaidat is a Fellow of SCS.
The field of wireless networks systems has witnessed tremendous growth in recent years causing it to become one of the fastest growing segments of the telecommunications technology. As wireless networks evolve with increasing size and profitability, they will be able to integrate with other wireless technologies enabling them to support mobile computing applications and perform as efficiently as wired networks. Due to the difficulties posed by the wireless transmission medium and the increasing demand for better and cheaper services, the area of wireless networks is also an extremely rich field for research and development.
This talk provides an in-depth coverage of the wide range of wireless technological alternatives offered today. It covers the fundamental techniques in the design, operation, and evaluation of wireless networks. It introduces the basic topics involved with wireless systems such as the electromagnetic spectrum physics of propagation, modulation multiple access and performance enhancement techniques, and cellular and ad-hoc concepts. It also presents the First Generation (1G) cellular systems, current Second Generation (2G) systems architectures supporting voice and data transfer and discusses the fast evolving world of Third Generation (3G) mobile networks systems. We will also, provide a vision of 4G and beyond mobile and wireless systems and describe satellite-based systems, fixed wireless systems, wireless LANs, wireless ATM and ad-hoc systems, Personal Area Networks (PANs) and security issues in wireless networks. Techniques for modeling simulation of wireless networks along with case studies will be covered as well.
This talk presents some of our recent research results including new protocols for wireless networks. Among these, an adaptive MAC protocol for distributed wireless LANs that is capable of operating efficiently under bursty traffic conditions. According to the proposed protocol, the mobile station that is granted permission to transmit is selected by means of a neural-based algorithm. Another new protocol for dynamically setting 802.11 wireless LAN waveforms and transmission power levels based on the wireless channel's signal to noise ratio will be introduced. Our method, known as Signal-to-Noise Ratio-Waveform Power Adaptation (SNR-WPA), changes the power in discrete steps matched to each of the 802.11 data rate-waveform steps. By matching the power to the spreading symbol rate, our technique maximizes the network throughput while minimizing MAC layer contention. We found through experimentation that the power adaptation in SNR-WPA yields up to a 30% increase in throughput in a mobile wireless LAN network.
Other related wireless research efforts by our group will be presented. We will also shed some light on the main challenges in wireless networks and systems.
An important factor that slows down the growth of multimedia networked services is that authors, publishers and providers of multimedia data are reluctant to allow the distribution of their documents in a networked environment. This is due to the fact that it is easy to reproduce digital data in their exact original form, which encourages copyright violation, data misappropriation and abuse. Watermarking security enhancement is highly needed for multimedia copyright applications. This talk presents some of our recent works that enhance the security of watermarking algorithm without affecting the robustness of the watermark by implementing the wavelet filter parameterization (WPF). Our experimental work shows that the watermarking algorithm based WPF robustness can enhance the security of watermarking.