The AF protocol of cooperative communication system

Wireless communication system using cooperative transmission technology, at the receiving node by combining data samples from multiple independent fading channel, can effectively resist the influence of channel fading, obtain diversity gain, and improve the transmission reliability of the system. The purpose of cooperative communication technology is to solve the problem of communication effectiveness. This article expounds the amplify-and-forward(AF) protocol of the cooperative relay technology that is one of the key technology in cooperative communication technology, and discusses its ergodic capacity(EC). Theory proves that two-way relay can greatly improve the rate of information transmission