Robust Broadband Beam-Forming Based on the Feature of Underwater Target Radiated Noise  

作　　者：陈新华 刘超 余华兵 郑恩明 孙长瑜 

机构地区：[1]Institute of Acoustics,Chinese Academy of Sciences [2]Haiying Enterprise Group Co.,Ltd. [3]Appsoft Technology Co.,Ltd.

出　　处：《China Ocean Engineering》2016年第6期1004-1011,共8页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61372180);the National Key Scientific Instrument Equipment Development Project of China(Grant No.2013YQ140431)

摘　　要：To the problem of the unknown underwater target detection, according to the feature that the underwater target radiated noise contains the stable line spectrum, a weighted method based on the main-to-side lobe ratio （MSLR） is proposed for broadband beam-forming. This weighted method can be implemented by using the following steps. Firstly, optimize the spatial spectrum of each frequency unit by the second-order cone programming （SOCP）, and obtain the optimized spatial spectrum with lower side lobe. Secondly, construct weighting factors based on the MSLR of the optimized spatial spectrums to from weight factors. Lastly, cumulate the spatial spectrum of each frequency unit via the weight statistical method of this paper. This method can restrain the disturbance of background noise, enhance the output signal-to-noise ratio （SNR）, and overcome the difficulty of traditional four-dimensional display. The theoretical analysis and simulation results both verify that this method can well enhance the spatial spectrum of line spectrum units, restrain the spatial spectrum of background noise units, and improve the performance of the broadband beam-forming.To the problem of the unknown underwater target detection, according to the feature that the underwater target radiated noise contains the stable line spectrum, a weighted method based on the main-to-side lobe ratio （MSLR） is proposed for broadband beam-forming. This weighted method can be implemented by using the following steps. Firstly, optimize the spatial spectrum of each frequency unit by the second-order cone programming （SOCP）, and obtain the optimized spatial spectrum with lower side lobe. Secondly, construct weighting factors based on the MSLR of the optimized spatial spectrums to from weight factors. Lastly, cumulate the spatial spectrum of each frequency unit via the weight statistical method of this paper. This method can restrain the disturbance of background noise, enhance the output signal-to-noise ratio （SNR）, and overcome the difficulty of traditional four-dimensional display. The theoretical analysis and simulation results both verify that this method can well enhance the spatial spectrum of line spectrum units, restrain the spatial spectrum of background noise units, and improve the performance of the broadband beam-forming.

关 键 词：information processing technology target detection broadband beam-forming main-to-side lobe ratio 

分 类 号：P733.22[天文地球—物理海洋学]