A FSE-SEI-SDD algorithm better for underwater acoustic communication

作者：Zhang Y^*; Zhao J; Guo Y; Li J

来源：Journal of Northwestern Polytechnical University, 2009, 27(4): 522-526.

• Algorithms
• Blind equalization
• Constant modulus algorithm (CMA)
• Fractionally-spaced equalizer (FSE)
• SDD (soft-decision directed) idea
• Super-exponential iteration (SEI) algorithm
• Underwater acoustics

The SEI (super-exponential iteration) algorithm of Ref.4 is better than the classical CMA (constant modulus algorithm) in that the convergence speed is higher. Benefiting from some ideas of Ref.5, including the SDD (soft-decision directed) idea, and utilizing the well known FSE (fractionally-spaced equalizer), we propose a FSE-SEI-SDD algorithm that is, we believe, better than CMA algorithm in that the convergence speed is higher and that the ISI (inter-symbol interference) is less. Section 1 of the full paper briefs the FSE. Subsection 2.1 briefs the SDD idea. Subsection 2.2 gives eqs.(20) through (25) needed for implementing the FSE-SEI-SDD algorithm. Section 3 verifies the performance of the FSE-SEI-SDD algorithm through computer simulation. The simulation result, given in Fig.3 in the full paper, shows preliminarily that, compared with classical CMA algorithm, our algorithm has higher convergence speed and less residual ISI.

• 出版日期2009
• 单位西北工业大学