在经典的MUSIC算法的基础上,结合米波雷达低角跟踪的特点,提出了一种对接收数据的协方差矩阵进行重构的新的修正MUSIC算法,然后分析了其解相干的原理.最后用MATLAB软件对其性能与MMUSIC(Modified MUSIC,MMUSIC)算法进行了仿真比较,结果表明对于2个以上的相干信号源,MMUSIC算法已失效,但新算法仍可准确地估计出各个相干信号源的DOA,并且对于2个相干信号源,其估计精度、估计的稳定性和估计的成功概率也明显高于MMUSIC算法.从而证明了该算法的有效性。

Based on MUSIC algorithm,a new modified MUSIC algorithm which uses the restructured covariance matrix for estimating the elevation angle of a target in meter-band radar low-angle tracking environment is presented.Then its elements of decorrelation is analysed.Finally through the MATLAB simulation and comparing it with MMUSIC algorithm,the result indicates that MMUSIC algorithm can't estimate the DOA of several coherent signals(more than two),but the new algorithm can estimate them exactly,and its estimated precision,estimated stability and estimated probability of success are also higher than MMUSIC,so the validity of it is proved.

TN958