摘要
针对近场大转角情况下水下转台目标成像问题,建立了目标回波信号模型,根据近场条件的特点将投影层析算法进行适当地修正后,用于解决当目标转动角度较大时运用距离-多普勒算法对其成像存在的越分辨单元走动难题。利用修正后的算法实现了多点目标以及刚性椭球目标的仿真成像,结果表明运用该算法可获得近场大转角情况下的水下转台目标成像。
For obtaining imaging of underwater target in near-field with large rotating angle, echo model of target was set up. In terms of properties of near-field, projection tomography algorithm was improved appropriately for overcoming Migration Through Resolution Cell generated from large rotation angle of target by using range-doppler algorithm. Simulated imaginaries of multi-points target and rigid ellipsoid were achieved by using the improved projection tomography algorithm, which demonstrate that the proposed algorithm can be used for imaging of underwater rotation target in near-field with large rotation angle.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第14期4300-4302,共3页
Journal of System Simulation
基金
国家部委级预研资助项目(5130302040202)
关键词
转台目标成像
改进的投影层析算法
近场
大转角
rotation target imaging
improved projection tomography algorithm
near-field
large rotation angle
