Sung Hyun Moon Sang-Rim Lee Jin-Sung Kim Inkyu Lee Channel quantization for block diagonalization with limited feedback in multiuser MIMO downlink channels. 1-9 2014 16 J. Commun. Networks 1 https://doi.org/10.1109/JCN.2014.000003 db/journals/jcn/jcn16.html#MoonLKL14