A fast computation method for MUSIC spectrum function based on circular arrays

作     者：Du, Zhengdong Wei, Ping 

作者机构：Univ Elect Sci & Technol China Sch Elect Engn Chengdu 610054 Peoples R China Southwest Elect & Telecommun Technol Res Inst Chengdu 610041 Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF ELECTRONICS》 (国际电子学杂志)

年 卷 期：2015年第102卷第2期

页      面：260-268页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：cyclic convolution computation amount DOA FFT circular arrays MUSIC algorithm 

摘      要：The large computation amount of multiple signal classification (MUSIC) spectrum function seriously affects the timeliness of direction finding system using MUSIC algorithm, especially in the two-dimensional directions of arrival (DOA) estimation of azimuth and elevation with a large antenna array. This paper proposes a fast computation method for MUSIC spectrum. It is suitable for any circular array. First, the circular array is transformed into a virtual uniform circular array, in the process of calculating MUSIC spectrum, for the cyclic characteristics of steering vector, the inner product in the calculation of spatial spectrum is realised by cyclic convolution. The computational amount of MUSIC spectrum is obviously less than that of the conventional method. It is a very practical way for MUSIC spectrum computation in circular arrays.