一种矢量阵近场恒定束宽波束形成方法

发布时间：2018-04-17 14:48

本文选题：矢量阵 + 近场　；参考：《舰船科学技术》2016年05期

【摘要】：矢量传感器可以同步共点地获取声场的标量和矢量信息,具有较好的指向性、紧凑的结构及抑制各向同性噪声干扰等优点,同时应用多个矢量传感器组成矢量阵可以获得更高的测量增益,为低信噪比条件下舰船辐射噪声量级的准确评价提供一种有效手段。本文建立矢量阵近场信号模型,给出基于单个矢量传感器输出量处理和基于阵列同类输出分量相乘处理的波束形成方法,并针对恒定束宽波束形成问题,提出一种基于Kaiser窗的近场恒定束宽波束形成方法,利用Kaiser窗的特点,通过设定窗函数的步长随指数变化,使设计波束响应逐渐趋于理想波束响应,提高了恒定束宽波束形成器的设计精度,最后通过仿真试验验证上述算法的性能。
[Abstract]:The vector sensor can synchronously obtain scalar and vector information of sound field, which has the advantages of good directivity, compact structure and suppression of isotropic noise interference.At the same time, using multiple vector sensors to form vector matrix can obtain higher measurement gain, which provides an effective method for accurate evaluation of ship radiation noise magnitude under low signal-to-noise ratio (SNR).In this paper, the near field signal model of vector array is established, and the beamforming method based on single vector sensor output processing and array similar output component multiplication processing is presented, and aiming at the problem of constant beamwidth beamforming,A near-field constant beamwidth beamforming method based on Kaiser window is proposed. By using the characteristics of Kaiser window, the design beam-response becomes more and more ideal by setting the step size of window function with exponential variation.The design accuracy of the constant beamwidth beamformer is improved. Finally, the performance of the algorithm is verified by simulation.
【作者单位】：大连测控技术研究所;
【分类号】：U674.70;TP212

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