On the sum rate of ZF detectors over correlated K fading MIMO channels

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 Signalto-Noise ratio (SNR) regime. In parallel, new, closed-form upper and lower bounds on the sum rate are derived that remain tight for all SNRs. The theoretical analysis is validated via a set of Monte-Carlo simulations.

• Type: Journal
• Year: 2011
• Where: ICASSP
• Authors: Michail Matthaiou, Nestor D. Chatzidiamantis, George K. Karagiannidis
• Keywords: Achievable Sum Rate, ICASSP 2011, Signal Processing, Sum Rate, Sum Rate Investigation