Beam division multiple access for massive MIMO downlink transmission
Paper i proceeding, 2015

We study a multiuser multicarrier downlink communication system in which the base station (BS) employs a large number of antennas. By assuming frequency-division duplex operation, we provide a beam domain channel model as the number of BS antennas grows asymptotically large. With this model, we first derive a closed-form upper bound on the achievable ergodic sum-rate before developing necessary conditions to asymptotically maximize the upper bound, with only statistical channel state information at the BS. Inspired by these conditions, we propose a beam division multiple access (BDMA) transmission scheme, where the BS communicates with users via different beams. For BDMA transmission, we design user scheduling to select users within non-overlapping beams, work out an optimal pilot design under a minimum mean square error criterion, and provide optimal pilot sequences by utilizing the Zadoff-Chu sequences. The proposed BDMA scheme reduces significantly the pilot overhead, as well as, the processing complexity at transceivers. Simulations demonstrate the high spectral efficiency of BDMA transmission and the advantages in the bit error rate performance of the proposed pilot sequences.

Författare

C. Sun

Southeast University

X. Gao

Southeast University

S. Jin

Southeast University

Michail Matthaiou

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Z. Ding

University of California

C. Xiao

Missouri University of Science and Technology

IEEE International Conference on Communications, ICC 2015; London; United Kingdom; 8-12 June 2015

1550-3607 (ISSN)

1970-1975

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Kommunikationssystem

Signalbehandling

DOI

10.1109/ICC.2015.7248614

ISBN

978-146736432-4