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一种改进的自适应混合神经网络盲分离算法 被引量:6

Improved self-adaptive mixing neural network algorithm for blind source separation
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摘要 传统的前馈神经网络盲源分离算法由于步长固定存在许多缺点,而基于Sigmoid函数的自适应步长算法虽然能够克服固定步长算法的缺陷,但其稳态性能较差。针对这个问题,提出一种改进的自适应步长算法,该算法可灵活地控制步长因子函数的形状,在近零点处变化较Sigmoid函数更加缓慢,性能更加优越;同时针对前馈神经网络的不足,在前馈神经网络结构中引入递归结构,利用改进的自适应步长算法控制学习速率。仿真分析表明该算法具有更快的分离速度和更加优越的分离效果。 The traditional feedforward neural network blind source separation algorithm is imperfect because of its fixed learning step.Although the self-adaptive step size algorithm based on Sigmoid-function can overcome the shortcomings of fixed step,its steady-state performance is poor.According to this problem,this paper proposed an improved self-adaptive step algorithm,which could flexibly control the shape of the step curve and the shape changed more slowly near the zeros than Sigmoid-function,the performance was more excellent.Secondly,considering the insufficient of feedforward neural network structure,this paper added a recursive structure into the whole model,adjusting learning step size with the improved self-adaptive step algorithm control algorithm.The simulation analysis shows that the algorithm has a faster separation speed and a better performance in convergence.
作者 吕淑平 祝捷
出处 《计算机应用研究》 CSCD 北大核心 2013年第4期1055-1057,共3页 Application Research of Computers
关键词 盲信号分离 神经网络 自适应步长 blind signal separation(BSS) neural network self-adaptive step size
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  • 1孙守宇,郑君里,吴里江,赵莹.峭度自适应学习率的盲信源分离[J].电子学报,2005,33(3):473-476. 被引量:11
  • 2范小军,刘锋.一种新的机动目标跟踪的多模型算法[J].电子与信息学报,2007,29(3):532-535. 被引量:32
  • 3史习智.盲信号处理[M].上海:上海交通大学出版社,2008.
  • 4裴学广.基于变步长自然梯度算法的盲源分离[J].舰船电子对抗,2007,30(4):65-68. 被引量:7
  • 5曲长文,徐征.一种新的基于角度和时差的稳健定位跟踪算法[J].信息处理,2011,27(2):230-236.
  • 6付卫红,杨小牛.改进的基于步长自适应的自然梯度盲源分离算法[J].华中科技大学学报(自然科学版),2007,35(10):18-20. 被引量:6
  • 7Wylie M P,Holtzman J.The non-line of sight problem in mobile location estimation[C].Proc IEEE International Conference on Universal PersonalCommunication,Cambridge,1996.
  • 8Thomas N J,Cruichshank G M,Aurenson D I.Performance of a TDOA-AOA hybrid mobile location system 3Gmobile communicationtechnologies[C].conference publication,London,2001.
  • 9RAPPAPORT T S,REED J,WOERNER B D.Position location using wireless communications on highways of the future[J].Communications Magazine,IEEE,1996,34(10):33-41.
  • 10COMMON P. Independent component analysis, a new concept [ J ]. Signal Processing, 1994,36 ( 3 ) :287-314.

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