Plenary Lecture

Determination of Performances of the First and the Second Order of Wireless Communication System in the Presence of Fading, Shadowing and Cochannel Interference by Using Different Mathematical Methods

Professor Dragana Krstic
Faculty of Electronic Engineering
University of Nis

Abstract: Radio waves are subjected to refractions, reflections and diffractions that cause multipath propagation resulting in variations of the signal envelope and degradation of the wireless communication system performances of the first and the second order. Large obstacles between transmitter and receiver cause signal shadowing resulting in comparatively slow variations of average power, and consequently, degradation of the system performance. For interference limited channels in cellular system, the effect of Gaussian noise on the system performance can be ignored, making the propagation effects dominant performance degradation mechanism. Diversity reception can be used to simultaneously reduce multipath fading effects, shadowing effects and cochannel interference effects on the wireless communication systems’ performance. Analytical work on determining characteristics of a mobile radio system that operates over composite fading and shadowing channels under cochannel interference will be presented in this lecture. Desired signal and interferences are under Gamma shadowed multipath fading. First, the formulas for probability density function and cumulative distribution unction (CDF) of the signal-to-interference ratio (SIR) will be derived in the closed-forms. Then, the closed-form expressions for the first and the second order system performance will be presented.

Brief Biography of the Speaker: Dragana S. Krstic was born in Pirot, Serbia. She received the BSc, MSc and PhD degrees in electrical engineering from Department of Telecommunications, Faculty of Electronic Engineering, University of Nis, Serbia, in 1990, 1998 and 2006, respectively. Her field of interest includes telecommunications theory, optical, wireless, mobile and satellite communication systems. She works at the Faculty of Electronic Engineering in Nis since 1990. She participated in more projects which are supported by Serbian Ministry of Science and some international projects. She has written or co-authored about 250 papers, published in the journals and at the international/ national conferences. She has reviewed many articles in IEEE Transactions on Communications; IEEE Communications Letters; ETRI journal; C&EE Journal; Elektronika ir Elektrotechnika and other well known journals. She is/ was reviewer of the papers for hundreds conferences and the member of technical program committees and international scientific committees of toward 70 scientific conferences. Also, she is Associate Editor or member of Editorial Advisory Board/ Editorial Board of several journals: International WSEAS Transactions on Communications, International Journal of Communications, Journal on Advances in Telecommunications, International Journal of Communications (IARAS). She is IARIA Fellow.

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