摘要
针对长时间积累过程中回波信号出现的距离徙动和多普勒走动问题,提出一种基于频域校正的快速长时间积累算法。该算法首先利用Radon-Ambiguity变换对脉压以后的回波信号进行加速度估计,用得到的估计值构造加速度补偿因子消除距离弯曲和多普勒走动,然后选取回波包络之间的相关系数作为代价函数对目标的速度进行估计,用得到的估计值构造速度补偿因子消除距离走动。仿真结果验证了该算法的有效性。
In order to solve range migration and Doppler walk caused by target motion during longtime coherent integration period,a novel fast algorithm based on frequency-domain correction is proposed.The Radon-Ambiguity transformation is utilized to estimate the acceleration and the acceleration compensation factor is constructed to correct range bend and Doppler walk. Then the relevance coefficient between the two echoes is used to estimate the velocity,and the velocity compensation factor is constructed to correct range walk. The simulation results prove the effectiveness of the proposed algorithm.
出处
《航空兵器》
2016年第2期61-65,共5页
Aero Weaponry
基金
国家自然科学基金项目(61271297
61272281
61301284)
国防预研基金项目(9140A07020913DZ01001)
关键词
长时间积累
距离徙动
多普勒走动
补偿因子
频域校正
long-time coherent integration
range migration
Doppler walk
compensation factor
frequency-domain correction
