Per-Tone Equalization for Single Carrier Block Transmission with Insufficient Cyclic Prefix*

  • Authors:

  • Kazunori Hayashi;Hideaki Sakai

  • Affiliations:

  • The authors are with the Graduate School of Informatics, Kyoto University, Kyoto-shi, 606--8501 Japan. E-mail: kazunori@i.kyoto-u.ac.jp;The authors are with the Graduate School of Informatics, Kyoto University, Kyoto-shi, 606--8501 Japan. E-mail: kazunori@i.kyoto-u.ac.jp

  • Venue:
  • IEICE - Transactions on Information and Systems
  • Year:
  • 2005

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Abstract

This paper proposes per-tone equalization methods for single carrier block transmission with cyclic prefix (SC-CP) systems. Minimum mean-square-error (MMSE) based optimum weights of the per-tone equalizers are derived for SISO (single-input single-output), SIMO (single-input multiple-output), and MIMO (multiple-input multiple-output) SC-CP systems. Unlike conventional frequency domain equalization methods, where discrete Fourier transform (DFT) is employed, the per-tone equalizers utilize sliding DFT, which makes it possible to achieve good performance even when the length of the guard interval is shorter than the channel order. Computer simulation results show that the proposed equalizers can significantly improve the bit error rate (BER) performance of the SISO, SIMO, and MIMO SC-CP systems with the insufficient guard interval.