Resource allocation in multiple DF relay assisted OFDM cognitive radio relay networks with the knowledge of fading statistics

In this paper, we study relay selection and power allocation in multiple decode-and-forward (DF) relay assisted OFDM cognitive radio (CR) relay networks. We consider the scenario where only the fading statistics between the cognitive and primary users are known at the CR transmitters. The objective of resource allocation is to maximize the instantaneous… (More)