A hybrid CME-LS channel estimation approach for broadband MIMO-OFDM systems

Authors:
Zhen Lu;Anthony Kadi;Tim Aubrey
Affiliations:
School of Computing and Communications, University of Technology, Sydney, Australia;School of Computing and Communications, University of Technology, Sydney, Australia;School of Computing and Communications, University of Technology, Sydney, Australia
Venue:
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Year:
2009

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Abstract

A channel estimation approach yielding both channel gains and the number of multi-paths is presented. The algorithm is based on a variation of conditional model order estimation (CME), and is proposed for MIMO-OFDM systems. The CME based estimator is shown to be viable in both fixed and mobile broadband MIMO-OFDM wireless applications, and takes advantage of determining the nonzero taps as well. The performance of the 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 2×2 MIMO-OFDM transceiver system. Results indicate 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.