基于信号相位匹配的相干源高分辨方位估计算法

A Better High-Resolution Algorithm for Direction Estimation of Coherent Sources

介绍了信号相位匹配的基本原理 ,给出了利用该原理进行高分辨方位估计的算法 ,以及不同情况下算法仿真的结果。仿真结果表明这种方位估计算法具有指向性尖锐、无旁瓣的特点 。

In radar and sonar data processing, high resolution direction estimation of coherent sources is important but, to our best knowledge, the price paid for obtaining it is, up to now, quite high. Starting from our previous paper , we extended it to develop a better high resolution algorithm presented in this paper. We extended the algorithm in Ref.2 to develop what we call SPM (signal phase match) algorithm. Section 1 explains in some detail the principles of SPM algorithm for obtaining high resolution direction estimation of coherent sources. On the basis of what is explained in section 1, we like to point out the advantages of SPM algorithm: (1) it can give a very sharp directivity and a very low side lobe; (2) it can distinguish between coherent sources with direction difference as small as about 1°. Simulation results of a numerical example, as shown in Figs.4,5, and 6, and Table 1, confirm preliminarily the two advantages of SPM algorithm proposed by us.