Research on a Robust Decision Feedback Blind Equalization Algorithm Used in Underwater Acoustic Channels
Feng Chengx · Fire Control and Command Control · 2014
Doppler frequency shift and a lot of impulse noises existing in the underwater acoustic channels will deteriorate the robustness and anti multipath effects of the decision feedback equalization algorithm. Aiming to improve the robustness of decision feedback equalization algorithm,this article brings forward one new equalization algorithm which takes Euclid norm of changes in both forward and feedback equalization filters as the cost function. Also,the algorithm includes DD、PLL and square decision technique to achieve better performances. The results of simulation show that this new decision feedback equalization algorithm performs stronger robustness as well as great convergence ability and fast convergence speed and maintains the advantages of traditional decision feedback equalizer.