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提出了基于矢量传感器阵的宽带相干信号子空间最优波束形成。建立了矢量传感器阵的宽带阵列信号模型,将宽带聚焦思想引入到了矢量传感器阵宽带处理,证明了矢量传感器阵与声压传感器阵宽带聚焦矩阵之间的关系,为矢量传感器阵宽带聚焦矩阵的构造提供了一种方法。推导了基于矢量传感器阵宽带最优波束形成的空间谱,通过空间重采样方法实现矢量传感器阵宽带聚焦,避免了对目标源方位的预估。通过仿真验证了矢量传感器阵具有更优越的性能:可以解宽带相干源;能够实现全空间无模糊定向;可以空间欠采样,因而在不增加计算量的基础上,能够提高阵列处理的性能;克服了传统声压传感器线阵端射方向上,目标方位估计性能下降的缺点。
The optimal beamforming in subspace of wideband coherent signals based on vector sensor array is proposed. The broadband array signal model of vector sensor array is established. The broadband focusing theory is introduced into the wideband processing of vector sensor array. The relationship between vector sensor matrix and broadband matrix of the pressure sensor array is proved. A method is provided. The space spectrum based on the optimal beamforming of vector sensor array is deduced, and the broadband of the vector sensor array is focused by the spatial resampling method, which avoids the estimation of the target source azimuth. Simulation results show that the vector sensor array has more superior performance: it can solve the problem of wideband coherent sources; it can realize the whole space without ambiguity orientation; it can space undersampled, so it can improve the performance of the array processing without increasing the amount of computation; In the traditional end-fire direction of the sound pressure sensor array, the performance of the target is estimated to decrease in performance.