摘要
该文提出了一种基于混合域的SAR回波快速算法。该算法利用空变的系统传递函数参与计算,沿距离时域积分计算回波信号2维频谱,从而实现了回波信号的精确仿真。复杂度和性能分析表明,该算法不仅能够在保证较高相位精度情况下有效提高回波仿真速度,而且在2维时域内易于添加运动误差模型。最后针对点阵和面目标进行了仿真,验证了算法的有效性。
In this paper,a SAR raw signal simulation algorithm is presented in a mixed time-frequency domain.By space-variant system transfer function along range,spectrum of raw signal is calculated precisely in range time domain.Then the complexity and phase precision are both analyzed.The result illustrates that it not only can improve the efficiency of simulation with high precision,but also can easily introduce motion error model in time domain.Finally several simulation experiments for point target and extended scene are provided.The results prove the validity of the proposed algorithm.
出处
《电子与信息学报》
EI
CSCD
北大核心
2011年第3期690-695,共6页
Journal of Electronics & Information Technology
基金
国家973计划项目(2009CB724003)
国家863计划项目(2007AA120302)资助课题
