Kai Wu Wenjin Wang 0001 Lu Gan 0002 Xiqi Gao 0001 Compressive CSI Acquisition and Non-Orthogonal Pilot Design for Downlink Massive MIMO Systems. 1-6 2016 GLOBECOM https://doi.org/10.1109/GLOCOM.2016.7841676 conf/globecom/2016 db/conf/globecom/globecom2016.html#WuWGG16