摘要
在合成孔径雷达(Synthetic Aperture Radar, SAR)的非线性变标(Non-Linear Chirp Scaling, NLCS)算法基础上,提出回波信号的几何分析模型,并对SAR目标空变关系进行误差分析,建立误差分析规范模型,研究SAR双频域NLCS成像性能与斜视角的关系,探究算法有效性能的斜视角界限,及NLCS算法在大斜视角高分辨率下应用问题。仿真实验结果表明:70°斜视角下,NLCS算法的性能到达临界值,证实了分析模型的正确性与可靠性。
Based on the Non-linear Chirp Scaling(NLCS) algorithm of Synthetic Aperture Radar(SAR), a geometric analysis model of echo signals is proposed to analyze the error of SAR target variant relationship. The error analysis specification model is established to consider the relationship between the SAR dual-frequency domain NLCS imaging performance and the squint angle, to explore the squint angle limit of the effective performance of the algorithm and the application of the NLCS algorithm in highly squint and high-resolution. The simulation results show that the performance of the NLCS algorithm reaches the critical value under the squint angle of 70°, which confirms the correctness and reliability of the geometric analysis model.
作者
叶宗奇
刘静
韦博
钟华
YE Zongqi;LIU Jing;WEI Bo;ZHONG Hua(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)
出处
《杭州电子科技大学学报（自然科学版）》
2020年第2期29-33,51,共6页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
声纳技术重点实验室开放基金资助项目(6142109KF201807)
浙江省公益技术研究计划资助项目(LGG18F010009)
浙江省教育厅一般科研资助项目(Y201840789,Y201840739)。
关键词
合成孔径雷达
双频域
几何分析模型
距离徙动矫正
NLCS算法
synthetic aperture radar(SAR)
dual-frequency domain
geometric analysis model
range cell migration correction(RCMC)
nonlinear chirp scaling(NLCS) algorithm
