基于相位解卷绕的SISAR运动参数估计及侧影像定标

提出一种用于阴影逆合成孔径雷达(SISAR)目标运动参数的方法。该算法首先通过相位解卷绕得到目标与发射点、接收点的距离和,进而得到目标的运动参数。在对目标侧影像进行定标时,利用恢复的侧影轮廓中线相位的差分均值消除目标相对于雷达的非线性转动引起的附加相位,获得几乎不受目标运动参数影响的侧影轮廓中线的高度和长度。仿真验证了所提方法的可行性。

Movement Parameter Estimation and Shadow Profile Scale for SISAR Based on Phase Unwrapping

An approach of estimating target movement parameters for Shadow Inverse Synthetic Aperture Radar(SISAR) is proposed.In the proposed approach,the distance sum of the moving target between the transmitter and the receiver is got by unwrapping the phase.And then,the target movement parameters are got.Then the target shadow profile is scaled,the mean of differentiation of the midline phase of shadow profile is used to eliminate the additive phase,which is brought by the radar non-linear turn of the target.The height and length of shadow profile midline are hardly influenced by the variety of the target movement parameters.Finally,the feasibility of these methods is shown by the results of computer simulation.