This paper proceeds directions of arrival (DOA) estimation by a linear array. These years, some algorithms, e.g. Khatri-Rao approach, Nested array, Dynamic array have been proposed for estimating more DOAs than sensors. These algorithms can merely estimate uncorrelated sources. For Khatri-Rao approach, this is due to the fact that Khatri-Rao product discard the non-diagonal entries of the corre...

The current article is a translation of a paper published in Significance journal, 2020, Vol. 17, No. 4 captioned as “C.R. Rao’s ‎Centurychr(chr(chr('39')39chr('39'))39chr(chr('39')39chr('39')))chr(chr(chr('39')39chr('39'))39chr(chr('39')39chr('39')))‎, which has been scripted as a perception of an appreciation  note by involvements of  Bradley Efron, Shun-ichi Amari, Donald B. Rubin, Arni S. R...