调频连续波圆迹环扫SAR成像方法  

Imaging method for circular scanning SAR based on FMCW technology

作　　者：廖轶[1] 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安陕西710071

出　　处：《系统工程与电子技术》2015年第9期1994-1999,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金优秀青年基金项目(61222108)课题资助

摘　　要：由于调频连续波(frequency-modulated continuous-wave,FMCW)雷达具有重量轻,成本低,高分辨等优势,在圆迹环扫合成孔径雷达(circular scanning synthetic aperture radar,CSSAR)快速广域成像方向具有较大的应用前景。针对CSSAR信号特点以及该模型下FMCW信号所引入剩余二次相位误差,提出了一种适用于FMCW-CSSAR的成像方法,该方法充分考虑了CSSAR高阶斜距近似的特点并对相应的剩余二次相位误差进行补偿,实现了精确成像。最后,点目标的仿真实验验证了所提算法的有效性。Due to its advantages of lightweight, cost-effective and high resolution, the combination of fre quency modulated continuous-wave （FMCW） technology and circular scanning synthetic aperture radar （CS- SAR） promise a bright future in the application of fast large area imaging. In order to handle the CSSAR signal and consider the residual secondary phase error introduced by FMCW technique, a new imaging algorithm suitable for FMCW-CSSAR is proposed, and precise imaging is reaIized with range highly approximated and residual secondary phase errors fully compensated. Simulation results of point targets are given to prove the effectiveness of the proposed approach.

关 键 词：调频连续波 圆迹环扫合成孔径雷达 距离徙动校正 剩余二次相位误差 

分 类 号：TN957[电子电信—信号与信息处理]