Adaptive turbo equalizer with stopping rule based on LDPC codes

Authors:
Myung-Kyu Lee;Kyeongcheol Yang
Affiliations:
The Department of Electronics and Electrical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk, Korea;The Department of Electronics and Electrical Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk, Korea
Venue:
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 2
Year:
2009

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Abstract

In this paper we propose a stopping rule for adaptive turbo equalizers based on low-density parity-check (LDPC) codes. Using an extrinsic information transfer (EXIT) chart, we analyze the convergence behavior of a turbo equalizer and devise an adaptive turbo equalizer with stopping rule. It monitors the status of iterative decoding and stops performing equalization when the decoding messages are reliable enough to converge successfully only by LDPC decoding. Simulation results show that the proposed scheme has lower complexity than the conventional schemes, while it has a similar performance.