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Volume 29 Issue 8
Jan.  2011
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Li Zi, Cai Yue-ming . Subspace-based Semiblind Channel Estimation in MC-CDMA Systems[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1906-1910. doi: 10.3724/SP.J.1146.2005.01691
Citation: Li Zi, Cai Yue-ming . Subspace-based Semiblind Channel Estimation in MC-CDMA Systems[J]. Journal of Electronics & Information Technology, 2007, 29(8): 1906-1910. doi: 10.3724/SP.J.1146.2005.01691

Subspace-based Semiblind Channel Estimation in MC-CDMA Systems

doi: 10.3724/SP.J.1146.2005.01691
  • Received Date: 2005-12-28
  • Rev Recd Date: 2006-07-10
  • Publish Date: 2007-08-19
  • This paper proposes a subspace-based semiblind channel estimation method in MC-CDMA systems. Combined with the characteristic of the signal model in MC-CDMA systems, this semiblind method solves the problem of slow convergence by the initial channel estimation, estimates the scalar ambiguities by inserting some users pilots and makes the algorithm complexity low by an iterative operation. All of these make the reality of semiblind channel estimation to be possible. The results of computer simulation prove the correctness of the method.
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  • Hara S and Prasad R. Overview of multicarrier CDMA. IEEE Communications Magazine, 1997, 35(12): 126-133.[2]Rappaport T S. Wireless Communications: Principles and Practice. Upper Saddle River, New Jersey, USA: Prentice- Hall, 1996, Chapter 1-3.[3]Choi J. Channel estimation for coherent multi-carrier CDMA systems over fast fading channels. IEEE Vehicular Technology Conference, Tokyo, Japan, May 2000, vol. 1: 400-404.[4]Tureli U, Kivanc D, and Liu H. Channel estimation for multicarrier CDMA. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Istanbul, Turkey, June 2000, vol. 5: 2909-2912.[5]Escudero C J, Iglesia D I, and Casteda L. A novel channel identification method for downlink multicarrier CDMA systems. IEEE Personal Indoor and Mobile Radio Communications (PIMRC), Yokohama, Japan, September 1993: 103-107.[6]Escudero C J, Iglesia D I, and Bugallo M F, et al.. Analysis of a subspace channel estimation technique for multicarrier cdma systems. IEEE Signal Processing Workshop on Statistical Signal and Array Processing, Pennsylvania-USA, August 14-16, 2000: 184-188.[7]Tong L, Sadler B M, and Dong M. Pilot assisted wireless transmissions: General model, design criteria, and signal processing[J].IEEE Signal Processing Magazine.2004, 21(6):12-25[8]Doukopoulos X G and Moustakides G V. Blind channel estimation for downlink CDMA systems. IEEE International Conference on Communications, Alaska, Anchorage, May. 2003: 2416-2420.
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