ISAR双站雷达融合成像回波生成方法研究

Research on echo generation method of bistatic ISAR radar fusion imaging

针对双站ISAR雷达融合成像回波生成方式不能真实反映双站雷达数据特点,难以验证后续融合成像算法的实际成像性能等问题,提出一种将两部雷达不同位置同时采样转化为同位置不同时间的采样模型。考虑了两部雷达间采样不同步性、载频不一致性、初始相位的非相参性等实际问题,以两部雷达融合成像回波生成为典型实例,说明ISAR多雷达融合成像回波生成方法的通用性和可扩充性。

In view of the fact that the echo generation method of bistatic ISAR radar fusion imaging fails to truly reflect the characteristics of dual radar data and to verify the actual imaging performance of the subsequent fusion imaging algorithm,a sampling model is proposed to convert the simultaneous sampling of two radars at different locations into the sampling model at different times at the same location.The practical problems such as sampling non⁃synchronization,carrier frequency inconsistency and initial phase incoherence between the two radars are considered.By taking the echo generation of fusion imaging of the two radars as a typical example,the universality and scalability of the ISAR(inverse synthetic aperture radar)multi⁃radar fusion imaging echo generation method is illustrated.