摘要
调频连续波合成孔径雷达(FMCW SAR)因具有体积小、重量轻、成本低、分辨率高的优点而受到越来越广泛的关注。介绍了调频连续波SAR的去调频信号模型和成像几何模型,重点推导了改进的距离-多普勒算法的流程,通过忽略斜置项和剩余视频相位项(RVP)对成像的影响,从而简化了算法复杂度,并给出了精确成像所需的方位向匹配滤波函数的改进方法,最后通过仿真验证了该算法的正确性和可行性。
FMCW SAR is a light-weight,cost-effective,high-resolution imaging radar,which is being more and more concerned.The de-chirp signal is derived,the geometry model is built and the whole process of RDA is explained in details.Because of neglecting the influence of the term of ramp and RVP,the complexity and the calculation can be simplified.In addition,modification of filter function in azimuth is introduced.At the end,simulation verifies the analysis and validity of the proposed algorithm.
出处
《舰船电子工程》
2011年第4期93-95,192,共4页
Ship Electronic Engineering
