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An Early Stopping Criterion for Turbo Processing of MIMO-OFDM in IEEE 802.16e Mobile WiMax System  

Hwang, Jong-Yoon (연세대학교 전기전자공학과 통신시스템 연구실)
Cho, Dong-Kyoon (삼성전자 정보통신총괄 통신연구소 공통기술 Lab.)
Whang, Keum-Chan (연세대학교 전기전자공학과 통신시스템 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.6A, 2007 , pp. 537-543 More about this Journal
Abstract
In this paper, we propose a new stopping criterion for the turbo processing (Turbo-BLAST) of MIMO-OFDM system. To reduce the high computational complexity of turbo-BLAST, it is desirable to lessen the outer-loop iteration number. In a system such as IEEE 802.16e Mobile WiMax, no CRC bits are available except the last encoding packet of a transmitted burst, so early stopping criteria without the help of CRC bits are needed. The proposed criterion counts the sign differences between received parity bits and the re-encoded parity bits from received information bits. With the tail-biting code which is accepted for IEEE 802.16e, a method that the re-encoder operates at half complexity is also proposed. Computer simulations show that the proposed stopping criterion approaches the performance of GENIE aided criterion with less average number of iterations than the other early stopping criteria.
Keywords
MIMO-OFDM; Turbo processing; Turbo-BLAST; Stopping criteria; IEEE 802.16e WiMax;
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1 B. Hochwald and S. Ten Brink, 'Achieving Near-Capacity on a Multiple-Antenna Channel', IEEE Trans. Commun., vol. 51, no. 3, pp. 389-399, March 2003   DOI   ScienceOn
2 R. Y. Shao, S. Lin, and M.P.C. Fossorier, 'Two Simple Stopping Criteria for Turbo Decoding', IEEE Trans. Commun., vol. 47, no. 8, pp. 1117-1120, Aug. 1999   DOI   ScienceOn
3 M. Moher, 'Decoding via Cross Entropy Minimization', Proc. IEEE Globecom Conf., pp. 809-813, Dec. 1993 (Houston, TX)
4 D. Raphaeli and A. Gurevitz, 'Investigation into decoding algorithm for turbo codes', Electro. Lett., vol.36, no.9, pp.809-810, April 2000   DOI   ScienceOn
5 M. Sellathurai and S. Haykin, 'TURBO-BLAST for Wireless Communications: Theory and Experiments', IEEE Trans. Commun., vol. 50, no. 10, pp. 2538-2546, Oct. 2002
6 Y. Wu, B. D. Woerner, and W. J. Ebel, 'A simple stopping criterion for turbo decoding', IEEE Commun. Lett., vol.4, no.8, pp.258-260, Aug. 2000   DOI   ScienceOn
7 J. B. Anderson and S. M. Hladik, 'Tailbiting Map decoders', IEEE J. Select. Areas Commun., vol. 16, pp. 297-302, Feb. 1998   DOI   ScienceOn
8 IEEE Std 802.16e-2005, Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems - Amendment 2 for Physical and Medium Access Control Layers for Combined Fixed and Mobile operation in Licensed Bands, Feb., 2006