| 弹载SAR大斜视改进CS成像算法 |
| |
| 引用本文： | 张冬磊,王蜂,李亚超.弹载SAR大斜视改进CS成像算法[J].宇航学报,2011,32(6). |
| |
| 作者姓名： | 张冬磊 王蜂 李亚超 |
| |
| 作者单位： | 1. 第二炮兵工程学院,西安,710025
2. 西安电子科技大学雷达信号处理重点实验室,西安,710071 |
| |
| 摘 要： | 针对弹载SAR在成像过程中复杂的运动状态,以及大斜视所造成的频谱混叠问题,建立了大斜视加速运动模型.引入新的CS因子,有效解决了距离频谱混叠问题并补偿了导弹在三方向速度和加速度的影响;引入方位deramp处理方法,有效解决了方位多普勒频谱混叠问题.仿真结果表明该方法优于现有算法.
|
| 关 键 词： | 弹载SAR 斜视 CS算法 加速运动模型 频谱混叠 |
Improved Chirp Scaling Algorithm for Missileborne SAR with High Squint |
| |
| ZHANG Dong-lei,WANG Feng,LI Ya-chao.Improved Chirp Scaling Algorithm for Missileborne SAR with High Squint[J].Journal of Astronautics,2011,32(6). |
| |
| Authors: | ZHANG Dong-lei WANG Feng LI Ya-chao |
| |
| Institution: | ZHANG Dong-lei1,WANG Feng1,LI Ya-chao2(1.The Second Artillery Engineering College,Xi'an 710025,China,2.Key laboratory for Radar Signal Processing,Xidian University,Xi'an 710071,China) |
| |
| Abstract: | A model for the high squint accelerated motion is built in order to deal with missileborne SAR's complicated motion state and solve the spectral overlapping phenomenon.The spectral overlapping phenomenon in distance is effectively solved by introducing a new CS factor,and the influence caused by velocity and acceleration of the missile is compensated.A deramp method is introduced to cope with the Doppler spectral overlapping phenomenon in azimuth.Simulation results shows this method outperforms existing one... |
| |
| Keywords: | Missileborne SAR High squint CS algorithm Accelerated motion model Spectral overlapping |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
