Energy efficiency analysis of cooperative relaying with decode-and-forward and amplify-and-forward schemes for wireless sensor networks

A comparative study of energy efficiency cooperative communication systems, communication with one assisted relay and communication with two assisted relays has been done based on the total energy consumption per bit by each relay for the cases of Amplify-Forward(AF) and Decode-Forward(DF) relaying schemes. The specifications like the range covered by the cooperative system, energy consumed per bit by the elements of the nodes for transmission, reception, amplification, decoding have been taken constant for both the systems, except for the fact that we use one relay in case of three node cooperative system and two relays in case of four node co-operative system. We also provided mathematical energy consumption of each case.