Downlink MIMO Channel Estimation from Bits: Recoverability and Algorithm
Downlink MIMO Channel Estimation from Bits: Recoverability and Algorithm
In frequency division duplex (FDD) massive MIMO systems, a major challenge lies in acquiring the downlink channel state information}\ (CSI) at the base station (BS) from limited feedback sent by the user equipment (UE). To tackle this fundamental task, our contribution is twofold: First, a simple feedback framework is proposed, …