基于级数反演谱的多子阵距离多普勒算法  

Multi-aperture range-Doppler imaging algorithm based on spectrum of series reversion

作　　者：吴浩然[1] 唐劲松[1] 钟何平[1] 佟怡铄 Wu Haoran;Tang Jinsong;Zhong Heping;Tong Yishuo(Naval Institute of Underwater Acoustic Technology;Scientic Research Department,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学水声技术研究所,湖北武汉430033 [2]海军工程大学科研部,湖北武汉430033

出　　处：《华中科技大学学报（自然科学版）》2018年第10期74-79,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61671461)

摘　　要：针对现有基于级数反演谱的多子阵成像算法具有子阵依赖的特点,须分别对每个子阵成像,从而导致计算效率低下的问题,提出一种基于级数反演谱的多子阵距离多普勒成像算法.该算法先将每个多子阵信号搬移至相同的最短斜距;然后忽略子阵间距离徙动项、方位调制项和二次距离压缩项,这样就能够通过方位重构的方式将多子阵信号转变成单基信号,因此仅须对单基信号进行一次成像处理就能得到成像结果;最后通过计算机仿真实验和实测数据表明：在相同条件下,该算法能够获得与现有算法一样的成像效果,并能够获得高达80%子阵数的加速比.To address the problem of computational inefficiency in the existing multi-aperture imaging algorithms based on the spectrum of the method of series reversion,which is the dependent for aperture and is required to perform separately imaging algorithm on the signals of each aperture,a multi-aperture range-Doppler imaging algorithm based on the spectrum of method of series reversion was proposed.First,the signal of each aperture was shifted to the same shortest range.Then,the range cell migration,the azimuth modulation and the secondary range compression between the apertures were ignored,making the multi-aperture signal transform into the single aperture signal by the azimuth reconstruction,so the imaging result was obtained by performing only once imaging algorithm.Finally,through the computer simulation experiment and real data,it is shown that the proposed algorithm can obtain the same imaging quality as the existing algorithm under the same condition,and get the acceleration ratio of 80% of the number aperture.

关 键 词：多子阵合成孔径声呐 级数反演 距离多普勒成像算法 距离徙动校正 最短斜距 

分 类 号：TP319.56[自动化与计算机技术—计算机软件与理论]