Data Directed Estimation Based Turbo Equalization in HF Communication

A block turbo equalization algorithm is proposed, which is generalized from Data Directed Estimation (DDE) widely used in HF communications. The convergence rate of our block turbo equalization algorithm is faster than that of the linear MMSE turbo equalizations. Two simplified schemes of this block turbo equalization algorithm are also introduced, which is LC-TDDE algorithm and BSIC algorithm respectively. The LC-TDDE algorithm performs better than linear MMSE algorithm, while its complexity is proportional to the square of the length of data block, the BSIC algorithm possesses a linear complexity with a performance very close to the linear MMSE algorithms.

[1]  R. Koetter,et al.  Turbo equalization , 2004, IEEE Signal Processing Magazine.

[2]  Jun Gao,et al.  Improved Block Soft Feedback Equalization Based on Sequence Detection , 2009, 2009 International Conference on Networks Security, Wireless Communications and Trusted Computing.

[3]  Fabian Vogelbruch,et al.  Low complexity turbo equalization based on soft feedback interference cancellation , 2005, IEEE Communications Letters.

[4]  Andrew C. Singer,et al.  Minimum mean squared error equalization using a priori information , 2002, IEEE Trans. Signal Process..

[5]  Alain Glavieux,et al.  Iterative correction of intersymbol interference: Turbo-equalization , 1995, Eur. Trans. Telecommun..

[6]  Andrew C. Singer,et al.  Turbo equalization: principles and new results , 2002, IEEE Trans. Commun..

[7]  Frank M. Hsu.  Data Directed Estimation Techniques for Single-Tone HF Modems , 1985, MILCOM 1985 - IEEE Military Communications Conference.

[8]  Zoran Zvonar,et al.  A comparison of decision feedback equalization and data directed estimation techniques for the GSM system , 1997, Proceedings of ICUPC 97 - 6th International Conference on Universal Personal Communications.