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General Information
Editor-in-chief
Prof. Wael Badawy
Department of Computing and Information Systems Umm Al Qura University, Canada
I'm happy to take on the position of editor in chief of IJCTE. We encourage authors to submit papers concerning any branch of computer theory and engineering.
IJCTE 2010 Vol.2(4): 564-568 ISSN: 1793-8201
DOI: 10.7763/IJCTE.2010.V2.202

The Effect of Subcarrier-Based Channel Estimation on the BER Bound of Turbo Coded OFDM/SDMA System

Y. Taghinia and G. Dadashzadeh, E. Jedari and A. R. Enayati

Abstract—In this paper, we study the performance of the channel estimation in a Turbo coded, orthogonal frequency division multiplexing (OFDM) with multiple antennas at the receiver. We survey the accuracy of the channel estimation for different number of users and different number of pilot subcarriers. Moreover, since there is not a closed form solution to the BER of the Turbo coded system for different number ofconstellation size. We develop an equation to obtain the BER bound of the Turbo coded OFDM/SDMA system with M-ary quadrature amplitude modulation (MQAM) in the Rayleigh flat fading channel as a function of the signal constellation and characteristic of the Turbo code with a curve fitting and then propose a method for selecting switching threshold in adaptive modulation case.

Index Terms—component; channel estimation, OFDM/SDMA systems, Turbo coding, BER bound, adaptive modulation.

Y. Taghinia and G. Dadashzadeh is with the Faculty of Engineering, Shahed University, Tehran, Iran (e-mail: {taghinia,gdadashzadeh}@shahed.ac.ir).
E. Jedari and A. R. Enayati are with the Communications Technology Institute, Iran Telecom. Research Center (ITRC), Tehran, Iran (e-mail:{ejedari, enayati}@itrc.ac.ir).

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Cite: Y. Taghinia and G. Dadashzadeh, E. Jedari and A. R. Enayati, "The Effect of Subcarrier-Based Channel Estimation on the BER Bound of Turbo Coded OFDM/SDMA System," International Journal of Computer Theory and Engineering vol. 2, no. 4, pp. 564-568, 2010.  

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