The geometry and echoed signal models of airborne bistatic sar in general flight configuration are introduced . two - dimensional matched filtering principle is examined and theoretical relationship between resolution and bistatic sar system parameters is suggested 本文首先分析了机载双基地sar在任意飞行模式下的几何模型与回波信号模型,阐述了二维匹配滤波成像机理,给出了分辨率与双基地sar系统参数间的理论关系。
Based on these studies , the properties of doppler and resolutions are analyzed . because the imaging algorithm of bistatic sar is related to the geometry models , the dissertation gives particularly empathies on the parallel model and the static receiver model in the broadside side - looking and stripmap 本文首先建立了任意飞行模式下双基地sar的几何模型和回波模型,分析了其多普勒特性和分辨率特性,得出双基地sar成像算法与飞行模式有密切关系的结论。
A chirp scaling algorithm for airborne bistatic sar is proposed , which is suitable for the flight configuration that transmitter and receiver follow parallel path with equal velocity in broadside looking mode . airborne bistatic sar echoed signal model of this particular flightpaths is derived . the model is converted into the range doppler space and is mapped from double range variables to single range variable domain 本文建立了这种特殊飞行模式下双基地sar的回波信号模型,推导了它在距离多普勒域的表达式,解决了信号模型从双距离变量域向单距离变量域转化的问题,并推导了cs因子的线性近似表达式,分析了算法中各种近似造成的误差。