ZF detectors over correlated K MIMO channels
Artikel i vetenskaplig tidskrift, 2011

This paper provides a systematic characterization of Zero-Forcing (ZF) detectors over multiple-input multiple-output (MIMO) channels that experience both small and large-scale fading. In particular, we consider the generic K distribution (Rayleigh/gamma distribution) to model the composite fading fluctuations and also assume the general case of semi-correlated small-scale fading. In the following, novel exact analytical expressions for the achievable sum rate are derived, followed by asymptotic expressions in the high and low Signal-to-Noise ratio (SNR) regimes. In these limiting cases, two common and insightful affine expansions are studied followed by new, closed-form upper and lower bounds on the sum rate that remain tight for all SNRs. In the second part of the paper, we present exact tractable expressions along with first-order expansions for the symbol error rate (SER) and outage probability; we also quantify the performance of ZF detectors in terms of diversity order and array (or coding) gain. The implications of the model parameters on the ZF detector performance are investigated via Monte-Carlo simulations which also validate the theoretical analysis.

multiple-input multiple-output (MIMO) systems

correlated fading

sum rate

Zero-forcing detection

performance analysis


Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

N. D. Chatzidiamantis

Aristotle University of Thessaloniki

George K. Karagiannidis

Aristotle University of Thessaloniki

Josef A. Nossek

Technische Universitat Munchen

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 59 1591-1603


Informations- och kommunikationsteknik


Elektroteknik och elektronik