摘要
针对空间高速自旋目标的ISAR成像问题,在分析高速自旋目标回波模型的基础上,提出了基于轨道运动的二维成像方法,利用压缩感知思想,有效缩短了成像积累时间,并结合自旋对目标回波的影响,提出了一种三维成像方法。所提方法根据利用轨道信息获得的二维像序列,获取目标散射点沿旋转轴方向的高度维信息,然后利用自旋信息通过压缩感知方法进行二维投影切片成像,从而得到三维成像结果。该方法通过预先获得目标散射点的高度维信息,大大缩减了搜索区间,提高了搜索精度,仿真结果验证了所提方法的有效性。
The inverse synthetic aperture radar（ ISAR） imaging problem of rapidly spinning targets is of great importance to space target recognition. Firstly,the echo model of rapidly spinning targets is established and analyzed,following which a two-dimensional（ 2 D） imaging method using the orbital information is presented,where compressed sensing（ CS） concept is incorporated for reducing the requisite pulses. Then,the spinning information is utilized for 2 D slice imaging via a CS method; consequently the high resolution 3 D image is obtained. The altitude information of scattering centers can be pre-estimated making use of the 2 D images obtained by orbital information,thus the proposed 3 D imaging method performs better than existing methods in terms of complexity and imaging quality. The effectiveness of the proposed method is validated with the simulation results.
作者
刘记红
韩国强
魏雁飞
樊友谊
LIU Ji-hong;HAN Guo-qiang;WEI Yan-fei;FAN You-yi(Luoyang Electronic Equipment Test Center of China, Luoyang, Henan 471003, China)
出处
《电子信息对抗技术》
2018年第3期1-7,77,共8页
Electronic Information Warfare Technology
