par Nguyen, Trung-Hien ;Louveaux, Jérôme;De Doncker, Philippe ;Horlin, François
Référence (25-28 May, 2020: Antwerp, Belgium), Proc. of the IEEE 91st Vehicular Technology Conference, VTC-Spring
Publication Publié, 2020-05
Publication dans des actes
Résumé : Multiple-antenna technologies provide a goodspatial diversity gain for emerging communication systems.In combination to the orthogonal frequency division multiplexing(OFDM) modulation, a precoding system can beeasily implemented and efficient to combat the effect offading channels. However, the precoding system requiresa perfect knowledge of the channel, which is not usuallyhold in practical cases. In this paper, we investigate theimpact of the imperfect channel state information (CSI)on the downlink performance of multiple-input singleoutput(MISO) OFDM systems using a matched-filter (MF)precoder. Particularly, the exact mean-square-error (MSE)expression of the equalized received signal of the MFprecoding system is derived. Numerical simulations withRayleigh fading channels are carried out to validate theanalysis. The results show that the imperfect CSI-basedprecoder causes a MSE plateau compared to the ideal caseof using the perfect CSI.