Low-degree root-MUSIC algorithm for fast DOA estimation based on variable substitution technique

摘要

＜正＞Dear editor,U-root-MUSIC [1] is one of the most popular unitary direction of arrival （DOA） estimation methods [2], and its eigenvalue decomposition （EVD）stage involves only real-valued （RV） arithmetic.Recently, a version of RV-root-MUSIC, which allows RV computations for both EVD and polynomial rooting, was reported in [3]. Nevertheless,the RV-root-MUSIC polynomial is of a high de-