... DOA,frequency, and polarization based on cumulants and UCA,”Journal of Systems Engineering and Electronics, vol. 18, no. 4,pp. 704–709, 2007.[15]K.C.Ho,K.C.Tan,andA.Nehorai,“Estimatingdirec-tions of ... Liu,1Jing He,2 and Zhong Liu11Department of Electronic Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China2Department of Electr ical and Computer Engineering, ... enables decorrelation of m ore coherent signals, joint estimation of the DOA and polarization of coherentsources with a lower computational complexity, and requires no limitation of the intervector...