Title :
On the sum rate of ZF detectors over correlated K fading MIMO channels
Author :
Matthaiou, Michail ; Chatzidiamantis, Nestor D. ; Karagiannidis, George K.
Author_Institution :
Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
This paper presents a detailed sum rate investigation of Zero-Forcing (ZF) detectors over composite multiple-input multiple-output (MIMO) channels. To this end, 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. Novel exact analytical expressions are derived for the achievable sum rate followed by asymptotic expressions in the low Signal to-Noise ratio (SNR) regime. In parallel, new, closed-form upper and lower bounds on the sum rate are derived that re main tight for all SNRs. The theoretical analysis is validated via a set of Monte-Carlo simulations.
Keywords :
MIMO communication; Monte Carlo methods; Rayleigh channels; gamma distribution; Monte-Carlo simulations; Rayleigh-gamma distribution; SNR regime; ZF detectors; asymptotic expressions; closed-form upper bound; composite fading fluctuation model; composite multiple-input multiple-output channel; correlated k fading MIMO channels; low signal to-noise ratio; lower bounds; semicorrelated small-scale fading channel; zero-forcing detectors; Correlation; Detectors; MIMO; Rayleigh channels; Receivers; Signal to noise ratio;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0538-0
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2011.5946713
