文章基本信息

标题：Performance analysis of Adaptive Switching Between Space-Time and Space-Frequency Block Coded OFDM Systems using ZF and MMSE techniques.
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作者：Ved Prakash Rai ; Pankaj Srivastava
期刊名称：International Journal of Advanced Networking and Applications
电子版ISSN：0975-0290
出版年度：2012
卷号：3
期号：5
页码：41-46
出版社：Eswar Publications
摘要：This paper focuses on the implementation and performance analysis of adaptive switching between STBC and SFBC OFDM systems [1].Here in this paper we proposed an adaptive transmission technique for MIMO OFDM systems using adaptive equalization algorithms (ZF,MMSE) where the channel response are unknown a priori and time variant. In this paper two selection criteria, correlation of the channel and magnitude of the interference, are proposed for transmission mode selection . In criterion I, correlation between successive OFDM symbols for STBCOFDM and correlation between neighboring subcarriers for SFBC-OFDM are compared and the mode which has higher correlation value is selected to maximize the SNR. Next, in criterion II, we choose the mode which has smaller Inter symbol Interference to reduce the performance degradation. Simulation results show that the proposed adaptive switching system shows better performance with ZF and MMSE equalizers[8].
关键词：space-time code (STC); MIMO-;OFDM;systems; adaptive;switching; Zero;forcing; Minimum mean square error