Tutorials

 T11 - Interference modeling and its mitigation in Wireless Communications Systems


Speakers
Prof. Asrar Sheikh, Bugshan/Bell Lab Chair in Telecommunications, Department of Electrical Engineering, King Fahd University of Petroleum and Minerals
Duration
1/2 Day
Start Time
9h00
Abstract
The presence of interference in mobile radio systems is perennial and has a limiting effect on the overall capacity of the wireless communication systems. This tutorial identifies the causes of interference, investigates its nature and models it in the presence of fading, frequency selectivity and shadowing. The developed models are then used to determine the impact of interference on digital transmission. To increase the capacity of wireless systems, interference must be reduced to a minimum. The interference can be minimized by exploiting its structure. Many types of signal processing techniques may be used to mitigate the effect of interference. For example, cyclostationarity of digital transmission in one method of dealing with interference whether co-channel or adjacent channel. Other methods include diversity, equalization, interference estimation and cancellation. This tutorial will describe interference in TDMA and CDMA systems and provide details on the methods to minimize it.


Short Biography of the Speaker(s):

Asrar U.H. Sheikh
graduated from the University of Engineering and Technology, Lahore, Pakistan with first class honours and received M.Sc. and Ph.D. degree from the University of Birmingham, England, in 1966 and 1969 respectively. After completing teaching assignments in several countries, he returned to Birmingham as a Research Fellow in 1975. He worked at Carleton University from 1981 to 1997, first as Associate Professor and later as a Professor and Associate Chairman for Graduate Studies. He was the Founder Director of PCS Research Laboratory at Carleton University. Before taking position of Bugshan/Bell Lab Chair in Telecommunications at King Fahd University of Petroleum and Minerals in April 2000, he was a Professor and Associate Head of the Department of Electronic and Information Engineering at Hong Kong Polytechnic University. He is also the founder director of Wireless Information Systems Research (WISR) Centre. At KFUPM he has established Telecommunications Research Laboratory. He has published over 180 papers in international journals and conference proceedings. He also authored or co-authored 28 technical reports. Dr. Sheikh is a co-recipient of Paul Adorian Premium from IERE (London) for his work on impulsive noise characterization. He was awarded teaching achievement awards in 1984 and 1986, and Research Achievement Award in 1994, all by Carleton University. He has organized and chaired many technical sessions at several international conferences. Dr. Sheikh is actively involved in several international conferences mainly as a member of Technical Program Committees. He Chaired the Technical Program of VTC'98. He is an editor of IEEE Transaction on Wireless Communications, a Technical Associate Editor of IEEE Communication Magazine. He is on the Editorial Board of Wireless Personal Communications, and Wireless Communications and Mobile Computing. He was a co-guest editor of the Special Issue of WPC on Interference. Dr. Sheikh is also on the reviewer panels of many IEEE and IEE Transactions and Journals. Dr. Sheikh has been consultant to many private companies and government agencies. His current interests are in signal processing in communications, mitigation of interference, spread spectrum and 3G and beyond systems. His other interests include helping developing countries in education and research. He had assignments under UNDP's sustained Development Program. He is a Fellow of the IEE and a Senior Member of the IEEE. Dr. Sheikh is also listed in Marquis Who’sWhos in the world.


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