基于一维高分辨距离像的相关测速补偿算法

Motion Compensation Method Based on One-Dimension High Resolution Range Profile Cross-Correlation

在分析运动目标对频率步进信号成像影响的基础上,阐述和推导了基于一维高分辨距离像的相关测速算法,给出了该算法的测速性能和实现流程.对是否利用IFFT结果的相位信息,提出了距离像实包络相关和复包络相关两种处理模式.针对空间高速运动目标,仿真和分析了各因素对测速精度的影响.结果表明,该算法测速精度高,计算量小,抗噪性能较好,为宽带雷达实时自测速补偿提供可能.

The effect caused by target motion on stepped-frequency＇signals imaging is discussed and a new method based on high resolution range profile cross-correlation for velocity measurement and motion compensation is analyzed in detail. The theoretical performance and implemental approach are also presented. Whether to utilize the phase information of the range profile, two processing modes namely real envelope cross-correlation and complex envelope cross-correlation are brought forward. Towards high speed space targets, simulations showed the measurement performance versus processing modes and other important factors. The results manifested that the method can have high accurate estimation with efficient computation and ensure the system＇s functions such as real-time independent velocity measurement and motion compensation.