一种曲线轨迹下的弹载前斜视成像算法

针对弹载SAR存在前视盲区的问题,提出了一种导弹运动轨迹配合的前斜视距离多普勒成像算法.该算法要求导弹沿曲线轨迹飞行,这样雷达天线以一定的斜视角指向目标,前视转换为前斜视模式就能够对目标成像.考虑到曲线轨迹下距离方程复杂、成像难度较大,首先获得距离方程的高阶近似表达式,并在时域作距离徙动校正;再利用级数反演法获得二维频率域表达式;最后通过二维匹配滤波获得成像结果.仿真实验验证了该算法的有效性.

Missile-borne squint SAR algorithm based on a curve locus

For the problem of the forward-looking blind zone on the missile-borne SAR,this paper presents a squint RD imaging algorithm in a missile trajectory.This algorithm requires a curve locus to receive target imaging,which causes the radar antenna to be directed to the target at a squint degree that changes the forward-looking into a squint mode.Considering the handicap by the complex trajectory equation under the curve locus,we first obtain the trajectory equation in high order,and takes RCMC(Range Cell Migrat...