1 research outputs found
Multi-Cell Multi-User Massive FD-MIMO: Downlink Precoding and Throughput Analysis
In this paper, downlink (DL) precoding and power allocation strategies are
identified for a time-division-duplex (TDD) multi-cell multi-user massive
Full-Dimension MIMO (FD-MIMO) network. Utilizing channel reciprocity, DL
channel state information (CSI) feedback is eliminated and the DL multi-user
MIMO precoding is linked to the uplink (UL) direction of arrival (DoA)
estimation through estimation of signal parameters via rotational invariance
technique (ESPRIT). Assuming non-orthogonal/non-ideal spreading sequences of
the UL pilots, the performance of the UL DoA estimation is analytically
characterized and the characterized DoA estimation error is incorporated into
the corresponding DL precoding and power allocation strategy. Simulation
results verify the accuracy of our analytical characterization of the DoA
estimation and demonstrate that the introduced multi-user MIMO precoding and
power allocation strategy outperforms existing zero-forcing based massive MIMO
strategies.Comment: 32 pages, 8 figures, submitted to IEEE Transactions on Wireless
Communication