Efficient Strip-Mode SAR Raw-Data Simulator of Extended Scenes Included Moving Targets Based on Reversion of Series  

作　　者：Liang Yang Daojian Zeng Jianhua Yan Yaozhang Sai 

机构地区：[1]School of Information and Electrical Engineering,Ludong University,Yantai,264025,China [2]Changsha University of Science&Technology,Changsha,410004,China [3]Mathematics Department,Florida Atlantic University,Florida,33431,USA

出　　处：《Computers, Materials & Continua》2020年第7期313-323,共11页计算机、材料和连续体（英文）

基　　金：The work was supported by the Natural Science Foundation of Shandong Province,China.(Grant No.ZR2017BF032)。

摘　　要：The Synthetic Aperture Radar(SAR)raw data generator is required to the evaluation of focusing algorithms,moving target analysis,and hardware design.The time-domain SAR simulator can generate the accurate raw data but it needs much time.The frequency-domain simulator not only increases the efficiency but also considers the trajectory deviations of the radar.In addition,the raw signal of the extended scene included static and moving targets can be generated by some frequency-domain simulators.However,the existing simulators concentrate on the raw signal simulation of the static extended scene and moving targets at uniform speed mostly.As for the issue,the two-dimensional signal spectrum of moving targets with constant acceleration can be derived accurately based on the geometric model of a side-looking SAR and reversion of series.And a frequency-domain algorithm for SAR echo signal simulation is presented based on the two-dimensional signal spectrum.The raw data generated with proposed method is verified by several simulation experiments.In addition to reveal the efficiency of the presented frequency-domain SAR scene simulator,the computational complexity of the proposed method is compared with the time-domain approach using the complex multiplication.Numerical results demonstrate that the present method can reduce the computational time significantly without accuracy loss while simulating SAR raw data.

关 键 词：Raw data simulation moving target reversion of series 

分 类 号：TN9[电子电信—信息与通信工程]