Joint channel estimation and ISI/ICI cancellation for MIMO?OFDM systems. (14th March 2011)

• Record Type: Journal Article
• Authors: Chiu, Yi-Jen; Chen, Chien-Sheng; Chang, Ting-Wei
• Is Part Of: International journal of ad hoc and ubiquitous computing. Volume 7:Number 2(2011)
• Page Start: 137
• Page End: 142
• Publication Date: 2011-03-14
• Subjects: ISI -- inter-symbol interference -- ICI -- inter-carrier interference -- expectation maximisation -- channel estimation -- ISI-ICI cancellation -- MIMO?OFDM systems -- simulation -- orthogonal frequency division multiplexing -- OFDM -- high-speed data transmission -- mobile communications; Ubiquitous computing -- Periodicals; Embedded computer systems -- Periodicals; Electronic data processing -- Distributed processing -- Periodicals; Wireless communication systems -- Periodicals; Computer architecture -- Periodicals; 004.2
• Languages: English
• ISSNs: 1743-8225

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.