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海洋噪声背景下基于随机共振方法的波束形成 被引量:3

Beamforming based on stochastic resonance with sea noise background
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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。 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.
出处 《声学技术》 CSCD 北大核心 2006年第2期98-102,共5页 Technical Acoustics
关键词 随机共振 双稳态模型 波束形成 频率尺度变换 stochastic resonance bistable model beamforming frequency scale transformation
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