Massive MIMO in Sparse Channels
Paper in proceedings, 2014

Massive multi-user multiple-input multiple-output (MU-MIMO) systems are cellular networks where the base stations (BSs) are equipped with hundreds of antennas, N, and communicate with tens of mobile stations (MSs), K, such that, N >> K >> 1. Contrary to most prior works, in this paper, we consider the uplink of a single-cell massive MIMO system operating in sparse channels with limited scattering. This case is of particular importance in most propagation scenarios, where the prevalent Rayleigh fading assumption becomes idealistic. We derive analytical approximations for the achievable rates of maximum-ratio combining (MRC) and zero-forcing (ZF) receivers. Furthermore, we study the asymptotic behavior of the achievable rates for both MRC and ZF receivers, when N and K go to infinity under the condition that N/K -> c >= 1. Our results indicate that the achievable rate of MRC receivers reaches an asymptotic saturation limit, whereas the achievable rate of ZF receivers grows logarithmically with the number of MSs.

Author

Nikolaos Kolomvakis

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Michail Matthaiou

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Mikael Coldrey

Ericsson AB

2014 IEEE 15th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

2325-3789 (ISSN)

October 21-25

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/SPAWC.2014.6941309

ISBN

978-1-4799-4903-8

More information

Latest update

11/19/2018