Massive MIMO in Sparse Channels
Paper i proceeding, 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.


Nikolaos Kolomvakis

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Mikael Coldrey

Ericsson Sweden

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

2325-3789 (ISSN)



Elektroteknik och elektronik