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

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。

Abstract: 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.