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Volume 26 Issue 2
Feb.  2004
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Shao Huai-zong, Peng Qi-cong, Li Yu-bai. An Adaptive Equalization Algorithm in Space-Time Block Coded OFDM System[J]. Journal of Electronics & Information Technology, 2004, 26(2): 284-290.
Citation: Shao Huai-zong, Peng Qi-cong, Li Yu-bai. An Adaptive Equalization Algorithm in Space-Time Block Coded OFDM System[J]. Journal of Electronics & Information Technology, 2004, 26(2): 284-290.

An Adaptive Equalization Algorithm in Space-Time Block Coded OFDM System

  • Received Date: 2002-08-14
  • Rev Recd Date: 2003-03-27
  • Publish Date: 2004-02-19
  • In this paper, an adaptive equalization algorithm used in Space-Time Block Coded (STBC) OFDM system with Alamouti scheme is proposed. In term of the orthogonal property of Alamouti scheme and the character of the OFDM system with multiple antenna transmitter, the proposed algorithm gets an equivalent model expression of receiver signal for STBC-OFDM system by flexible transform method; Studying on II matrix, inverse of size of 2K2K matrix in Block RLS(BRLS) can be obtained by getting the inverse of K matrices of 22 gotten by decomposing it, so that the complexity of computation and receiver has been decreased. The simulation results prove the validity and property of fast convergence of the proposed algorithm.
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  • Weinstein S B, Ebert P M. Data transmission by frequency division multiplexing using the discrete Fourier transform[J].IEEE Trans. on Commun. Technol.1971, 19(10):628-634[2]Cimini L J, Jr., Daneshrad B, Sollenberger N R. Clustered OFDM with transmitter diversity and coding. in Proc. 1996 IEEE Global Telecommunications Conf. London, U.K, 1996: 703-707.[3]Mignone V, Morello A. CD3-OFDM: A novel demodulation scheme for fixed and mobile receivers.IEEE Trans. on Commun., 1996, COM-44(9): 1144-1151.[4]Van de Beek J J, Edfors O, Sandell M, Wilson S K, Borjesson P O. On channel estimation in OFDM systems. in Proc. 45th IEEE Vehicular Technology Conf., Chicago, IL, 1995: 815-819.[5]Moon J K, Chio S. Performance of channel estimation methods for OFDM systems in multipath fading channels[J].IEEE Trans. on Consumer Electronics.2000, 46(1):161-170[6]Hoeher P, Kaiser S, Robertson P. Two-dimensional pilot-symbol-aided channel estimation by Wiener filtering. In Proc. 1997 IEEE Int. Conf. ASSP, Miinich, Germany, 1997: 1845-1848.Hmimy H H. Channel estimation based on coded pilot for OFDM. in Proc. 47th IEEE Global Telecomm. Conf., Phoenix, AZ, May 1997: 1375-1379.[7]Edfors O, Sandell M. OFDM channel estimation by singular value decomposition. IEEE Trans.on Commun., 1998, COM-46(7): 931-939.[8]Li Ye, Cimini L J, Jr., Sollengerger N R. Robust channel estimation for OFDM system with rapid dispersive fading channels. IEEE Trans. on Commun., 1998, COM-46(7): 902-915.[9]Agrawal D, Tarokh V, Naguib A, Seshadri N. Space-time coded OFDM for high data rate wireless communication over wideband channels. in Proc. IEEE Vehicular Technology Conf., Ottawa Cananda, March 1998: 2232-2236.[10]Li Ye(Geoffrey), Seshadri N, Aryavisitakul S. Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels[J].IEEE J. on Selectel Areas in Commun.1999, 17(3):461-471[11]Tarokh V, Seshadri N, Calderbank A R. Space-time codes for high data rate wireless communication: Performance analysis and code construction. IEEE Trans. on Info. Theory, 1998, IT-44(3):744-765.
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