Joint channel estimation and ISI/ICI cancellation for MIMO–OFDM systems
by Yi-Jen Chiu, Chien-Sheng Chen, Ting-Wei Chang
International Journal of Ad Hoc and Ubiquitous Computing (IJAHUC), Vol. 7, No. 2, 2011

Abstract: In MIMO–OFDM systems, the multipath components whose delays exceed Cyclic Prefix cause Inter-Symbol Interference and Inter-Carrier Interference, which may degrade system performance severely. In this paper, we propose a joint channel estimation and ISI/ICI cancellation scheme in which a limited CP is used in a trade-off against high-rate performance in MIMO–OFDM systems. A channel estimation scheme based on the criterion of Expectation-Maximisation (EM) algorithm can be proposed through the use of a training symbol. Simulation results show that the proposed method can significantly enhance the overall MIMO–OFDM system performance after only a few iterations.

Online publication date: Fri, 11-Mar-2011

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