On the Performance of Joint Relay Selection and Beamforming with Limited Feedback for AF Cooperative Networks
Ang Yang, Chengwen Xing, Zesong Fei, Jingming Kuang · 2011
In this paper, we focus on a two-hop amplify-and-forward (AF) cooperative network, in which one source node equipped with multiple antennas communicates with a single-antenna destination, relying on a single-antenna relay. In order to implement beamforming, channel state information (CSI) is feeded back to the source from relay using random vector quantization (RVQ) codebook. Furthermore, one relay with the best CSI is selected in each communication. An upper bound of the outage probability of the whole system is derived and the simulation results show that this bound is very tight.