基于雷达与诱饵时序不一致的DOA估计算法

Algorithm for DOA Estimation Based on Time Inconsistency Signals of Radar and Decoy

由于诱饵的存在使反辐射武器天线接收的信号时序不一致,已经无法通过传统多重信号分类(multiple signal classification,MUSIC)和旋转不变子空间(rotational invariance techniques,ESPRIT)算法对其脉冲进行前沿、后沿或中间脉冲取样来准确跟踪目标雷达。针对此问题提出两种适用于估计时序不一致信号波达方向(direction of arrival,DOA)的算法。第一种基于ESPRIT算法,适用于信号相互独立的情况,第二种基于MUSIC算法,适用于相干信号的情况。计算机仿真试验表明,与同类算法相比,两种新方法具有更好的估计性能。

Due to decoy, the time sequence of the signals received by anti-radiation weapon antennas is inconsistent, the target radar can not be accurately shadowed through sampling the cutting-edge and trailing edge and the middle of the pulse when the classical multiple sig- nal classification（MUSIC） and rotational invariance techniques （ESPRIT） are used. Two algorithms for estimating direetion of arrival （DOA） of time ineonsistency signal were proposed. The first algorithm based on ESPRIT algorithm can be used for independent signals, the second one based on MUSIC algorithm can be used for coherent signals. Computer simulation confirms that, compared with similar al- gorithms, the two new methods can get better performance.