非停走停假设下宽带斜视多子阵合成孔径声纳回波数据仿真

Simulation of multi-subarray synthetic aperture sonar echo data in broadband squint with non-stop-and-go hypothesis

针对宽带斜视多子阵合成孔径声纳方位向等效均匀回波数据仿真问题,首先从合成孔径区间的选择、脉冲重复频率在不造成距离模糊和方位向多普勒频谱混叠时的设定以及多普勒中心的定义等方面给出了多子阵合成孔径声纳的参数设定方法;然后,提出了数据基线的概念及在数据基线中点的等效的单阵SAS生成方位向均匀回波数据时对PRF设定的要求;最后,通过点目标回波数据仿真验证了该方法的正确性和有效性。

In order to solve the problem of azimuth uniform echo data simulation of multi-subarray synthetic aperture sonar in broadband squint with non-stop-and-go hypothesis,the parameters setting of synthetic aperture sonar is proposed considering the synthetic aperture section,the pulse repetition frequency,the distance blur,the azimuth Doppler spectrum aliasing and the Doppler center position.And the concept of data baseline is proposed.The equivalence single array SAS lies in the midpoint of the data baseline and the equivalent azimuth uniform echo data on the PRF requirements is pointed out,and the position of the Doppler center is defined.The echo data simulation of the point targets verifies the correctness and validity of the proposed method.