单个二阶组合水听器的性能分析  

Performance analysis of a single acoustic dyadic sensor

作　　者：王绪虎[1,2] 陈建峰[2] 韩晶[2] 张群飞[2] 

机构地区：[1]青岛理工大学通信与电子工程学院,山东青岛266520 [2]西北工业大学航海学院,西安710072

出　　处：《振动与冲击》2014年第18期120-125,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(61001153);山东省高等学校科技计划(J09LG08);西北工业大学基础研究基金(JC20100223)

摘　　要：对二阶组合水听器在各向同性噪声场中的工作性能进行了分析。推导了各向同性噪声场中二阶组合水听器输出的自协方差矩阵,分析了两种基于单个二阶组合水听器的波束形成方法,在此基础上推导了二阶组合水听器两种波束形成方法的处理增益公式。仿真结果表明,二阶组合水听器在小孔径下具有更好的指向性和更大的处理增益,它的常规波束形成器处理增益分布在5.23 dB-6.12 dB之间;它的MVDR波束形成器在不同方向具有相同的增益,值约为9.54 dB。The performance of a single acoustic dyadic sensor （ADS） in an isotropic noise field was analyzed here. The covariance matrix of the ADS outputs in the isotropic noise field was deduced and two beam-forming methods based on a single ADS were analyzed. Then, the formulas for the processing gains of the two beam-forming methods were derived. The simulation results indicated that ADS has better directivity and bigger processing gain under small hole-diameters; the processing gain of its conventional beamformer （CBF） based on a single ADS is between 5.23 dB to 6.12 dB, and the processing gain of its minimum variance distortionless response （MVDR） beamformer based on a single ADS is about 9.54 dB in different directions.

关 键 词：二阶组合水听器 各向同性噪声 波束形成 增益 

分 类 号：TB566[交通运输工程—水声工程]