摘要
舰船目标受海浪的影响而呈现多倍周期和随机性的摆动。针对这种情况,提出了一种基于钟摆模型的成像 方法。该方法利用每个距离单元的相位历程中所含大幅度的线性调频分量进行成像。为了补偿实际目标转动过程中 因不完全符合钟摆转动模型而引起的三阶及更高阶的相位误差,在一阶相位误差估计算法的基础上得出了二阶相位 误差估计方法,并结合Radon-wigner算法以及“CLEAN”法得出了比较稳健的相位自聚焦方法。实测数据处理结 果证实了该方法的有效性。
Driven by ocean wave, the swing of a ship possesses characters of multi-cycle and randomness. In this paper, imaging method based on pendulum module is proposed for dealing with these problems. This approach develops images from linear frequency modulation components that are included in the phase history in every range bin. To compensate the three and higher order phase errors, rank two phase estimator is presented based on the available theory of rank one phase estimator. A robust auto-focus algorithm is also presented based on the Randon-Wigner algorithm and the idea of ＇CLEAN＇ The effectiveness of the algorithm is verified by processing of real data.
出处
《电子与信息学报》
EI
CSCD
北大核心
2006年第1期1-6,共6页
Journal of Electronics & Information Technology
基金
国家部级基金资助课题
