主动合成孔径声纳几种算法比较

海洋开发和反潜战的需求成为推动声纳技术发展的主要动力。主动合成孔径声纳（ASAS）作为一种新型高分辨水下成像声纳,利用小孔径的物理声阵,得到与径向距离和频率都无关的方位分辨率。运动补偿是合成孔径声纳的关键问题,利用多接收阵回波数据的互相关特性进行补偿有距离多普勒、线性调频空变平移、波束域等多种算法,通过对几种算法的分析比较,结合仿真验证,为实际应用提供了依据。

Comparison of algorithms for active synthetic aperture sonar

The requirement of the ocean exploration and anti-submarine warfare is the main motivation of the sonar technology development.As a novel kind of underwater imaging sonar with high resolution,active synthetic aperture sonar synthesizes an aperture and by processing the results as if they had been obtained from a multi-element array enables a high azimuth resolution to be obtained from a physically small array.Motion compensation is the key technique for synthetic aperture sonar,and it is normally realized in SAS system based on multi receiving arrays and their cross correlation.Range Doppler(RD),chirp scaling(CS) and beamspace(w-k) algorithms are algorithms to carry out motion compensation.The analysis and comparison of several algorithms with the combination of the simulation analysis provide the basis for practical application.