The author analyzes the characteristic of the peaks of MUSIC spectrum in thesense of numerical value, uses the signed gradient algorithm two times to extract thepeaks, and gives the matrix model of the process of peak searching.

• （3）分析了 MUSIC 空间谱的谱峰的数值特征，采用了二次符号梯度算法来提取谱峰特征，并推导了谱峰特征提取的矩阵模型；