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Adaptive detection scheme in accordance with channel condition for MIMO-OFDM system

Published: 30 October 2008 Publication History

Abstract

This paper proposes a MIMO detection scheme reducing the computational complexity and providing comparable performance to the QRD-M detection scheme for MIMO-OFDM systems. The proposed scheme checks the channel condition per subcarrier and then selects detection scheme either ordered DFE scheme or adaptive QRD-M detection scheme according to that information. The post-detection SNR, which judges channel condition, depends on Moore-Penrose pseudo-inverse matrix G. The proposed scheme selects the ordered DFE detection scheme in case of good channel condition and the adaptive QRD-M detection scheme in case of bad channel condition. The adaptive QRD-M detection scheme selects the number of survival symbols M in accordance with the channel condition at the each layer. Compared with the QRD-M (M=16) detection scheme, the proposed detection scheme reduces the computational complexity about 67 percents and achieves similar performance.

References

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P. W. Wolniansky, G. J. Foschini, G. D. Golden and R. A. Valenzuela. V-BLAST: An architecture for realizing very high data rates over the rich-scattering wireless channel. Proc. ISSSE'98, pages 295--300. Italy, September 1998.
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X. Zhu and R. D Murch. Performance analysis of maximum likelihood detection in a MIMO antenna system. IEEE. Trans.Commun, 50(2):187--191, February 2002.
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K.-J. KIM, J. Yue, R. A. Iltis and J. D. Gibson. A QRD-M/Kalman filter-based detection and channel estimation algorithm for MIMO-OFDM Systems. IEEE Trans. Wireless Commun, 4(2):710--421, March 2005.
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H. Kawai, K. Higuchi, N. Meada and M. Saqahashi. Adaptive control of survivng symbol replica candidates in QRM-MLD for OFDM MIMO multiplexing. IEEE J. Select. Areas Commun, 24(6):1130--1140, March 2005.
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      cover image ACM Conferences
      MobiWac '08: Proceedings of the 6th ACM international symposium on Mobility management and wireless access
      October 2008
      192 pages
      ISBN:9781605580555
      DOI:10.1145/1454659
      • General Chair:
      • Sherali Zeadally,
      • Program Chair:
      • Bjorn Landfeldt
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      Published: 30 October 2008

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      Author Tags

      1. mimo
      2. moore-penrose pseudo-inverse matrix
      3. post snr
      4. qrd-m

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