Beam Division Multiple Access Transmission for Massive MIMO Communications
Artikel i vetenskaplig tidskrift, 2015

We study multicarrier multiuser multiple-input multiple-output (MU-MIMO) systems, in which the base station employs an asymptotically large number of antennas. We analyze a fully correlated channel matrix and provide a beam domain channel model, where the channel gains are independent of sub-carriers. For this model, we first derive a closed-form upper bound on the achievable ergodic sum-rate, based on which, we develop asymptotically necessary and sufficient conditions for optimal downlink transmission that require only statistical channel state information at the transmitter. Furthermore, we propose a beam division multiple access (BDMA) transmission scheme that simultaneously serves multiple users via different beams. By selecting users within non-overlapping beams, the MU-MIMO channels can be equivalently decomposed into multiple single-user MIMO channels; this scheme significantly reduces the overhead of channel estimation, as well as, the processing complexity at transceivers. For BDMA transmission, we work out an optimal pilot design criterion to minimize the mean square error (MSE) and provide optimal pilot sequences by utilizing the Zadoff-Chu sequences. Simulations demonstrate the near-optimal performance of BDMA transmission and the advantages of the proposed pilot sequences.

Beam division multiple access (BDMA)

statistical channel state information (CSI)

massive MIMO

sum-rate upper bound

Författare

C. Sun

Southeast University

X. Gao

Southeast University

S. Jin

Southeast University

Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Z. Ding

UC Davis

C. Xiao

Missouri University of Science and Technology

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 63 2170-2184

Ämneskategorier

Kommunikationssystem

Signalbehandling

DOI

10.1109/TCOMM.2015.2425882