文章摘要
安良,陈励军,陆佶人.海洋噪声背景下基于随机共振方法的波束形成[J].声学技术,2006,(2):98~102
海洋噪声背景下基于随机共振方法的波束形成
Beamforming based on stochastic resonance with sea noise background
投稿时间:2005-01-31  修订日期:2005-04-15
DOI:
中文关键词: 随机共振  双稳态模型  波束形成  频率尺度变换
英文关键词: stochastic resonance  bistable model  beamforming  frequency scale transformation
基金项目:
作者单位
安良 东南大学无线电工程系, 南京, 210096 
陈励军 东南大学无线电工程系, 南京, 210096 
陆佶人 东南大学无线电工程系, 南京, 210096 
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中文摘要:
      为了改善低信噪比下波束形成的性能,从双稳态随机共振模型出发,提出了利用频率尺度变换,将随机共振和波束形成结合起来的算法。给出了双稳态模型参数的估计方法、数值仿真和应用于海洋噪声背景下波束形成的实验结果。由实验结果可见,随机共振确实改善了波束形成器输入数据的质量,从而提高了波束形成的性能以及信噪比。
英文摘要:
      To improve beamforming under low signal-to-noise ratio,a method based on stochastic resonance(SR)in a bistable model is investigated by using a frequency scale transformation method.Simulation results and a trial test with sea noise background are given,together a method of estimating parameters of the bistable model.The results show that SR can improve the input data and enhance SNR.
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