A New Approach to Estimating the MIMO Channel in Wireless Networks

  • 발행 : 2007.09.30

초록

This paper investigates on the use of constant-amplitude zero-autocorrelation (CAZAC) sequence for channel estimation in multiple-input multiple-output (MIMO) system over indoor wireless channel. Since the symbol-length of the conventional 4-phase CAZAC sequence is short, there is a limitation to use it for MIMO system in multipath environments. An algorithm which generates longer CAZAC sequences is proposed to overcome that problem. Flexible symbol-length of 4-phase CAZAC sequences can be made by the proposed algorithm. Therefore appropriate symbol-length of CAZAC sequences could be utilized as preambles in accordance with the number of transmit antennas and channel condition. The effect of the number of CAZAC sequences for channel estimation is presented in terms of mean square error (MSE).

키워드

참고문헌

  1. A. Milewski, 'Periodic sequences with optimal properties for channel estimation and fast start-up equalization,' IBM J. Res. Develop., vol. 27, pp. 425-528, Sep. 1983
  2. Dong-Jun Cho, Young-Hwan You, and Hyoung-Kyu Song, 'Channel Estimation with Transmitter Diversity for High Rate WPAN Systems,' IEICE Trans. Commun., vol. E87-B, no.11 Nov. 2004
  3. IEEE 802.11a 802.11-98/156-r2, 'Updated submission template for Tga-revision2.'
  4. IEEE P802.15-00/110r13, 'IEEE 802.15.3 (TG3) criteria definitions,' Sep. 2000
  5. IEEE StdP802.15.3-2003, 2003
  6. J. G. Proakis and D. G. Manolakis, Digital Signal Processing, Prentice Hall, New Jersey