浅海大孔径线列阵子阵阵增益分析与评估  

Arraygain Analysis and Evaluation of Large-aperture Linear Array Subarray in Shallow Water

作　　者：刘豫鲁 刘清宇 刘雄厚 余赟 

机构地区：[1]海军研究院,北京100161 [2]中科院声学研究所,北京100190

出　　处：《舰船电子工程》2017年第10期120-122,共3页Ship Electronic Engineering

摘　　要：声信号在海洋中传播时,由于受到复杂海洋环境的影响,波形会发生畸变。理想情况下常规波束形成的阵增益可以达到10logN,但是由于波形畸变,到达线列阵各阵元处的信号相关性下降,从而导致阵增益低于10logN。论文针对典型浅海环境,研究窄带信号经过浅海传播,到达大孔径线列阵各阵元处的信号水平纵向相关性,并分析此时大孔径线列阵进行子阵处理时的检测性能。以常规波束形成为例,计算大孔径线列阵的阵增益并分析影响阵增益的因素。When the acoustic signal is propagated in the ocean,the waveform will be distorted due to the complex marine envi-ronment. Ideally,the array gain of the conventional beamforming can reach 10 logN,but due to the distortion of the waveform,thesignal waveform correlation is reduced at the linear array,resulting in a decrease for the array gain. In this paper,for a typical shal-low sea environment,to study singal horizontal correlation when narrowband signal through the propagation arrive at a large aperturelinear array,the signal relevant radius can be obtained. Taking the conventional beamforming as an example,the array gain of thelinear array is calculated and the factors influencing the gain are analyzed.

关 键 词：信号空间相关性 常规波束形成 阵增益 

分 类 号：TB56[交通运输工程—水声工程]