Analysis of MIMO Precoding with Base Station Cooperation and Imperfect Channel Estimation

Velser Correia, Francisco Rodrigo Porto Cavalcanti, Yuri Carvalho Barbosa Silva

DOI: 10.14209/sbrt.2008.42750

Evento: XXVI Simpósio Brasileiro de Telecomunicações (SBrT2008)

Keywords: Base Station Cooperation MIMO Precoding Transmit Beamforming

Abstract

In this paper, the performance of different linear and non-linear precoding techniques is assessed assuming base station cooperation and imperfect channel estimation. The evaluation considers the downlink of a multicell-multiuser MIMO system in which the base stations cooperate as a joint MIMO transmitter, so that streams intended to all co-channel users are spread across all transmit antennas. Precoding techniques are employed to suppress co-channel interference and the average spectral efficiency per user is evaluated for different levels of perturbation, which is added to the actual channel. The present work shows that, depending on the antenna configuration and on the SNR, the algorithms may present a different sensitivity to estimation errors.

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