@article{EURECOM+5815, author = {Qiu, Shuang and Gesbert, David and Chen, Da and Jiang, Tao}, title = {A covariance-based hybrid channel feedback in FDD massive MIMO systems}, journal = {IEEE Transactions on Communications, October 2019}, year = {2019}, note = {© 2019 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.}, }