目标高速运动对一维像的影响及其校正方法

针对目标高速运动引起回波脉冲压缩结果展宽从而严重影响一维距离像质量的问题,提出了基于多分量调幅线性调频信号参数估计的校正方法。首先建立了宽带目标的多散射中心回波模型,定量分析了目标高速运动对高分辨雷达回波的影响。然后提出了多分量调幅线性调频信号参数估计快速算法,估计出目标高速运动引起的回波变化从而加以校正。仿真结果表明,提出的方法能有效校正目标高速运动对一维距离像的影响,并且对噪声具有很好的鲁棒性。

Effect of high velocity target on range profile and correction method

To investigate the problem of serious influence of compressed echo pulse widening caused by target's high velocity on the range profile quality, a correction method based on a fast estimation of multi-component LFM parameters is proposed. Firstly, a multi-scatter echo model of the high resolution radar is built. The quantitative analysis of effect of the target's high velocity on the echo is given based on the model. Then the fast estimation method of multi-component LFM parameters is proposed to estimate the change of echo caused by the high velocity and correct the change. Simulation results show that the method can reduce the influence of high velocity on the range profile efficiently and has good robust property.