Accurate Source Number Detection Using Pre-Estimated Signal Subspace. - Yoshihisa Ishikawa; Koichi Ichige; Hiroyuki Arai (IEICE Trans. Commun., 2006)

High Resolution DOA Estimation Using Second-Order Differential of MUSIC Spectrum. - Koichi Ichige; Yoshihisa Ishikawa; Hiroyuki Arai (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

High resolution 2-D DOA estimation using second-order partial-differential of MUSIC spectrum. - Koichi Ichige; Yoshihisa Ishikawa; Hiroyuki Arai (ISCAS, 2008)