文章基本信息

标题：OPTIMAL PILOT-SYMBOL PATTERNS FOR MIMO OFDM SYSTEMS UNDER TIME VARYING CHANNELS
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作者：MY ABDELKADER YOUSSEFI ; JAMAL EL ABBADI
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：65
期号：1
出版社：Journal of Theoretical and Applied
摘要：This paper presents a new approach to achieve optimal training sequences (OTS) in terms of minimizing the mean-square channel estimation error for spectrally efficient MIMO OFDM systems. It is shown that the OTS are equi-powered, equi-spaced and position orthogonal. However, in special cases we can find that required conditions to achieve optimal pilot design are not satisfied, this means the optimum pilot is unachievable. In this paper, an algorithm is proposed to achieve suboptimum pilot design under time varying channels. To offer high throughput gains, we propose an adaptive pilot scheme in order to optimally use pilot tones over time varying channels.
关键词：Differential evolution (DE); OFDM; MIMO; Mobile multipath channel.