基于平滑相干变换处理的分裂孔径波束形成方法  

A Split Aperture Beamforming Method based on Smooth Coherence Transformation

作　　者：范泽亚 徐雅南[1] 陈伏虎[1] FAN Zeya;XU Yanan;CHEN Fuhu(Hangzhou Applied Acoustic Research Institute,Hangzhou 310012,China)

机构地区：[1]杭州应用声学研究所,浙江杭州310012

出　　处：《软件工程》2021年第1期29-31,共3页Software Engineering

摘　　要：传统声呐系统通常将全阵波束形成结果直接送显输出,且全阵波束处理往往未有效利用信号的相关性,针对此特点,本文结合平滑相干变换(Smoothed Coherence Transform,SCOT)处理原理,提出一种基于SCOT预白化处理的分裂孔径波束形成处理方法。该方法首先将阵列孔径一分为二,其次对两子孔径波束输出进行SCOT、互谱处理,最后获得最终的波束输出。与常规全阵波束处理方法相比,本文所提出的方法能有效抑制高噪声频率成分,同时提高目标的方位分辨能力。仿真结果表明,该方法能有效改善波束的输出效果。Traditional sonar systems tend to directly display and output to send the results of full-array beamforming.The full-array beam processing does not make effective use of signal correlation.In view of this feature,this paper proposes a split aperture beamforming processing method based on Smoothed Coherence Transform(SCOT)pre-whitening processing principles.This method first divides the array aperture into two,and then performs SCOT and cross-spectrum processing on the output of the two sub-aperture beams.Finally,it obtains the final beam output.Compared with the conventional full-array beam processing method,the method proposed in this paper can effectively suppress high-noise frequency components while improving the target's azimuth resolution ability.The simulation results show that this method can effectively improve the beam output effect.

关 键 词：SCOT 分裂孔径 噪声抑制 方位分辨 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]