摘要
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.
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 Migration Correction） in the time-doppler domain, then derive the two-dimensional frequency domain expression by series reversion and finally receive the imaging results by a two-dimensional matched filter. Simulation results verifies its validity.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2011年第1期123-130,共8页
Journal of Xidian University
基金
国家自然科学基金资助项目(60672130)
关键词
弹载
前斜视
级数反演法
合成孔径雷达
RD算法
曲线轨迹
missile-borne
squint
series reversion
SAR（ synthetic aperture radar）
range-Doppler（RD）
curve locus
