Network Coded Cooperation Based on Relay Selection with Imperfect CSI

Abstract

In this paper, we investigate the performance of network coded cooperation (NCC) systems based on relay selection in the presence of imperfect channel state information (CSI). Specifically, we consider an uplink cellular scenario with $\mathcal{N}$ sources, $\mathcal{M}$ relays and a single destination. The relays adopt decode and forward (DF) relaying and use maximum distance separable (MDS) codes as their encoding vectors. We investigate the impact of imperfect CSI on outage probability and asymptotic and finite-SNR diversity-multiplexing tradeoff (DMT) of the system under consideration. Simulation results are further presented to corroborate the analytical findings and provide insight into the system design where imperfect CSI and finite SNR regime are taken into account.