The spatial spectrum estimation is an important issue of the modern signal processing. MUSIC is a good solution in DOA estimation of incoherent signals. This algorithm is briefly introduced here. If MUSIC algorithm is used to process wide⁃spread existing coherent signals directly,vagueness and even failure may occur. In order to estimate the DOA accurately,a pre⁃treatment must be undertaken to decoherence. The spatial smoothing technique based on split array element is proposed according to the traditional spatial smoothing processing. A simple analysis about the advantages and disadvantages of the method is given. Simulation result shows that the method is feasible and effective.% 空间谱估计是现代信号处理研究的重要课题，对于非相干信号的DOA估计，采用MUSIC就能取得好的分辨效果，对此算法进行了简要介绍。对于广泛存在的相干信号，直接采用MUSIC则存在很大的模糊性甚至失效，为了准确地进行DOA估计，必须经过预处理解相干。针对传统的空域平滑处理，提出了均分阵元的空间平滑技术，经仿真验证，新方法可行、有效，最后分析了该方法的优势和弊端。
展开▼
