一种改进的谱峰跟踪运动补偿算法

Modified Algorithm for Motion Compensation of Spectrum Peak Tracking

针对步进频率信号成像过程中存在的多普勒敏感特性,介绍了常用的谱峰跟踪运动补偿法,在分析传统算法局限性的基础上,对其进行改进,将搜索到各距离像的谱峰间的距离与门限进行比较,以判断是否存在搜索有误或距离像折叠的情况。Monte-Carlo仿真实验表明,改进后的算法具有测速精度高,抗噪能力强,受距离像折叠的影响较小等优点。

Based on the Doppler sensitive character existing in the imaging process of the stepping frequency radar signal,a motion compensation algorithm of spectrum peak tracking is introduced.A new modified algorithm is proposed according to the analysis aiming at the localization of conventional spectrum peak tracking.The threshold is compared to the distance between the spectrum peaks of the the searched range profiles to judge whether there are false peaks or foldings of the range profiles.Monte-Carlo simulation experiments show that the modified algorithm has higher accuracy of velocity measurement and better anti-noise performance,and is effected a little bit by the range profile foldings.