摘要
针对传统运动目标参数估计方法将运动目标假设为匀速运动的不足,提出了一种新的多通道运动目标参数估计方法.通过构造含有加速度的运动目标回波模型,拟合多通道方位向回波数据的瞬时频率曲线,求解方程组获得各种运动参数的估计值,并重新构造运动目标的方位向匹配函数,对运动目标进行重新聚焦.克服了用匀速运动目标模型对加速目标进行运动参数估计误差较大的问题.仿真分析验证了该运动参数估计方法的有效性.
To overcome the shortcomings of the traditional moving target parameter estimation methods which assume that the target moves with a constant velocity, a new multi-channel moving target parameter estimation algorithm is proposed. By polynomially fitting the instant frequency curve of the azimuth echoes and solving the equations, we can get the estimation of the moving parameters. Furthermore, by reconstructing the azimuth reference function the focused images of the targets can be obtained. The method overcomes the considerable parameter estimation error of an accelerated target obtained by the constant velocity model. Finally the validity of the algorithm is verified by simulations.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2009年第4期624-628,668,共6页
Journal of Xidian University
基金
国家自然科学基金资助(60736009)
