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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 3, May 2009

Issue on Electrical & Electronics

Page(s): 283-286

On the Convergence of a Turbo Equalizer in terms of AMI

Aruna Tripathy

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The average mutual information (AMI) is a useful metric to study the convergence behavior of the iteratively decodable receivers. A turbo equalizer (TEQ) has been considered as a class of such iterative receiver. We derive a new expression for the AMI at the equalizer input under no apriori information condition. Its value is compared with that at the output of the equalizer under perfect apriori information conditions. The importance of this study is to evaluate the effect of a TEQ on a signal corrupt with severe intersymbol interference and additive white Gaussian noise (AWGN). This study is useful for studying the convergence behavior of a TEQ without resorting to time consuming extensive computer simulations as usually reported in literature.

Index Terms

SCS, AMI, TEQ, apriori information, ISI

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