A CME based channel estimation approach for MIMO-OFDM systems

Authors:
Zhen Lu;Anthony Kadi;Tim Aubrey
Affiliations:
Faculty of Engineering and Information Technology, University of Technology, Sydney, Sydney, Australia;Faculty of Engineering and Information Technology, University of Technology, Sydney, Sydney, Australia;Faculty of Engineering and Information Technology, University of Technology, Sydney, Sydney, Australia
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

A pilot-assisted, conditional model-order estimation (CME) based channel estimation algorithm is presented. The algorithm is proposed for MIMO-OFDM systems and can detect both channel frequency responses and number of multi-path taps. In addition, the modified CME estimator is also verified its capacity in determining the nonzero taps. The performance of the proposed approach is compared to the popular minimum description length (MDL) algorithm for estimation of the number of channel paths, by means of simulation in the context of a 2x2 MIMO-OFDM transceiver system. Result indicates that the new algorithm is superior in channel order estimation to the MDL algorithm in MMO-OFDM system over a noisy frequency selective fading channel.