一种基于矢量传感器阵的盲波束形成方法研究

Blind beamforming method based on vector sensor array

本文针对水声环境和信号的特点,提出了一种基于矢量传感器阵的盲波束形成算法。首先建立了矢量传感器阵列接收信号模型,然后推导了基于矢量传感器阵列的波束形成最优权矢量的表达式。在此基础上,定义了接收信号的四阶累积量,进而盲估计了矢量传感器阵列的方向向量,实现了盲波束形成。该方法利用高阶累积量可消除高斯噪声干扰这一特性,有效地实现了基于矢量传感器阵列的盲波束形成。仿真实验验证了该方法的有效性和正确性。

In this paper a blind beamforming algorithm based on vector sensor array is presented according to the characteristics of underwater acoustic environment and acoustic signal. Firstly, received signal model for the vector sensor array is given. Then, an optimized weight vector formula is given for beamforming of the vector sensor array. Based on this, we define a fourth-order cumulant of received signal and blindly estimate the bearing vector for the vector sensor array to carry out blind beamforming （BBF）. This method uses the characteristic that high-order cumulant can eliminate effect of Gaussian noise to carry out the blind optimizing beamforming of the vector sensor array. Simulation experiment proves the effectiveness and correctness of this algorithm.