频率自适应最优权重阵列干涉条纹处理技术
发布时间：2018-12-11 17:35
【摘要】：考虑长基线水平阵列波束形成对声场模态呈现的滤波特征,建立了一种随频率改变滤波通带的阵列权矢量设计方法。基于简正波理论,结合声场波束形成特点,在分析了常规波束形成信号LOFAR谱图干涉条纹的清晰度和条纹结构不同于单水听器输出信号条纹现象基础上,采用线性等式约束的二次优化模型,给出了一种频率自适应的最优权重估计。数值仿真验证和试验数据分析表明,利用该方法设计的最优权重阵列波束处理,可以滤波出SRBR(Surface-Reflected Bottom-Reflected)或N-SRBR(Non-Surface-Reflected Bottom-Reflected)模态组成的波束形成信号,信号谱图干涉条纹斜率与理论分析基本一致。
[Abstract]:Considering the filtering characteristics of sound field modes presented by long baseline horizontal array beamforming, an array weight vector design method for filtering passband with frequency change is established. Based on the theory of normal wave and the characteristics of beamforming in sound field, the definition and structure of interference fringes of conventional beamforming signal LOFAR spectrum are analyzed, which is different from the phenomenon of single hydrophone output signal fringe. Using the quadratic optimization model with linear equality constraints, a frequency adaptive optimal weight estimation is presented. Numerical simulation and experimental data analysis show that the beamforming signals composed of SRBR (Surface-Reflected Bottom-Reflected) or N-SRBR (Non-Surface-Reflected Bottom-Reflected) modes can be filtered by using the optimal weight array beam processing designed by this method. The slope of interference fringes in signal spectrum diagram is basically consistent with the theoretical analysis.
【作者单位】： 海军潜艇学院;
【基金】：教育部“新世纪优秀人才支持计划NCET”项目 “国家530专项2015年军队项目”资助
【分类号】：P733.2;TB56
[Abstract]:Considering the filtering characteristics of sound field modes presented by long baseline horizontal array beamforming, an array weight vector design method for filtering passband with frequency change is established. Based on the theory of normal wave and the characteristics of beamforming in sound field, the definition and structure of interference fringes of conventional beamforming signal LOFAR spectrum are analyzed, which is different from the phenomenon of single hydrophone output signal fringe. Using the quadratic optimization model with linear equality constraints, a frequency adaptive optimal weight estimation is presented. Numerical simulation and experimental data analysis show that the beamforming signals composed of SRBR (Surface-Reflected Bottom-Reflected) or N-SRBR (Non-Surface-Reflected Bottom-Reflected) modes can be filtered by using the optimal weight array beam processing designed by this method. The slope of interference fringes in signal spectrum diagram is basically consistent with the theoretical analysis.
【作者单位】： 海军潜艇学院;
【基金】：教育部“新世纪优秀人才支持计划NCET”项目 “国家530专项2015年军队项目”资助
【分类号】：P733.2;TB56
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