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2010/1/8镜像同步0 回复

学术讲座通知题目：Channel Estimation for OFDM Modulated Two-Way Relay Networks 报告人：Prof. Feifei Gao（德国不来梅大学）主持人：尹长川教授（信通院）时间：2010年1月12日（周二）下午2:30-4:30 地点：教三楼108 摘要：In this talk, we introduce the model of employing orthogonal-frequency-division multiplexing (OFDM) for transmission over time-dispersive channels in the two-way relay network (TWRN), where two source terminals exchange their information through a relay terminal using the amplify-and-forward (AF) relaying scheme. We propose a two-phase training protocol for the channel estimation, which is compatible with the two-phase data transmission scheme. In the first phase, the two source terminals send their individual training sequences concurrently to the relay, while in the second phase the relay amplifies the received training sequences and broadcasts them to both source terminals. We propose two different types of training methods as well as develop their corresponding channel estimation algorithms at each of the two source terminals. The first type of training is block based, for which we first estimate the cascaded sourcerelay- source channels, and then design algorithms to recover the individual channels between sources and relay. The second type of training is pilot-tone (PT) based, for which we propose to directly estimate the individual channels between sources and relay. Moreover, the identifiability issues on the non-ambiguous estimate of the channels in both types of proposed training are carefully addressed. Finally, various numerical examples are presented to corroborate our analytical results. 此讲座为前沿科技讲座，欢迎全校师生踊跃参加。校学术委员会信息与通信工程学院 2010年1月8日 -------------------------------------------------------------------------------- 返回

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