The Viability of Distributed Antennas for Massive MIMO Systems
Kien T. Truong and Robert W. Heath, Jr.
In Proc. of Asilomar Conference on Signals, Systems, and Computers, pp. 1318 - 1323 , Nov., 2013.
Massive multiple-input multiple-output (MIMO) is
a breakthrough communication technique for providing high
spectral efficiency. The idea is to deploy a very large number
of antennas at each base station and to use multiuser MIMO
transmission to serve a smaller number of users. In this paper, the
viability of using distributed antennas for massive MIMO on the
uplink is investigated for a particular spatial correlation channel
model. Both maximal ratio combining (MRC) and minimum
mean squared error (MMSE) beamforming are found to provide
higher performance in several distributed settings. An algorithm
for remote radio head selection is proposed that allows MRC to
approach the performance achieved by the MMSE beamforming
solution yet retaining its lower complexity.