@ARTICLE {21431,
author={W. L.  Liangtian and G. H. Han and J. J. Jiang and J. R. Rodrigues and N. F. Feng and T. Z. Zhu},
doi={10.1109/JSYST.2015.2445052},
journal={IEEE Systems Journal},
title={DOA Estimation for Coherently Distributed Sources Considering Circular and Noncircular Signals in Massive MIMO Systems},
year={2017},
month={March},
volume={11},
number={1},
pages={41-49},
ISSN={1932-8184}
}