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http://dx.doi.org/10.9708/jksci.2012.17.7.077

Performance Enhancement of OFDM Systems (Using Interference cancellation schemes of TD(Transmit Diversity))  

Kim, Jang-Wook (School of Electrical Engineering Dept. of Information Electronics, Dongyang Mirea University)
Publication Information
Journal of the Korea Society of Computer and Information / v.17, no.7, 2012 , pp. 77-86 More about this Journal
Abstract
Using OFDM(Orthogonal Frequency Division Multiplexing) provides the same diversity order as MRRC(Maximal Ratio Receiver Combining). It is assumed that fading channel is constant across two consecutive symbols. Unfortunately, when the channel condition is changed for the two consecutive symbols, the OFDM using STBC(Space Time Block Code) does not offer good performance due to the large doppler shift. In this paper, we have proposed a performance enhancement scheme for OFDM using STBC over time-selective fading channel. Simulation results for various doppler shift rates are presented to robust system performance of OFDM due to using our proposed scheme over time-selective fading channel.
Keywords
OFDM; TD; Interference cancellation;
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