Distributed power control for cooperative relaying with fixed amplifying gain

To reduce interference and fading effect, the use of power control is the most eligible way. We consider power control in a cooperative communication system consisting of multiple sources and multiple relays and the relay is assumed to be amplify-and-forward. We proposes a new distributed power control algorithm for cooperative relaying(DPCCR). In this distributed algorithm, each source updates its power level iteratively using estimates of the inverse of the signal-to-interference and noise ratio(SINR) of its own channel. We analyzes convergence properties of proposed algorithms by using standard techniques. Simulation results show that a respectable decrease in system outage performance and power saving can be achieved, when compared with other power control algorithm without relaying.