基于TLS-ESPRIT算法的导引头多目标DOA估计技术及改进方法

Multiple target DOA estimation technology and improved method of missile seeker based on TLS-ESPRIT algorithm

针对目前应用的MUSIC算法计算时间过长的问题,提出并实现了基于TLS-ESPRIT算法的导引头多目标到达方向(Direction of Arrival,DOA)估计技术。相比于目前MUSIC算法,DOA估计时间实现了有效的缩短。同时,针对TLS-ESPRIT算法在工程上实际估计多目标的DOA时必须提前知道目标数量,如果目标数量估计不准确,就会造成DOA估计错误的问题,提出了基于TLS-ESPRIT算法的改进算法。可以做到在未知目标数量的情况下,进行目标数量的判断,进而进行准确的DOA估计。在实际工程条件下,估计准确率可以达到88%以上。

On the basis of a current seeker model,a multi-target Direction of Arrival(Aiming to solve the problem that the computing time of current MUSIC algorithm is too long,DOA)estimation technology based on TLS-ESPRIT algorithm is proposed and implemented.Compared with the current MUSIC algorithm,the DOA estimation time has been effectively shortened.At the same time,the number of targets must be known in advance when the TLS-ESPRIT algorithm is used in the DOA estimation of multiple targets in engineering.if the number of targets is not estimated accurately,it will cause the problem of DOA estimation errors,so an improved algorithm based on the TLS-ESPRIT algorithm is proposed to judge the number of targets and estimate the DOA accurately when the number of targets is unknown.Under actual engineering conditions,the estimation accuracy can reach more than 88%.