Improved Null-Space Expansion Scheme under Presence of Channel Estimation Error for Multiuser Massive MIMO. - Nobutaka Funaki; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2020)

Dimensionality reduction of interference subspace for multiuser massive MIMO null-space expansion. - Nobutaka Funaki; Kazuki Maruta; Chang-Jun Ahn (Digit. Signal Process., 2021)