Energy Modeling and Optimization of Cooperative Dual-Relay Systems

Abstract

Cooperative relays have been used in many wireless applications to reduce transmit power as well as adding receiver diversity. However, the energy efficiency trade-offs of relay networks have not been thoroughly investigated using a more complete energy model of the system. In this paper we present an energy model for a cooperative dual-relay system using decode-and-forward (DF) protocol with receiver diversity. Energy consumption is based on models of both analog and digital components for transmission and reception. A quartic transmit power amplifier (PA) energy equation is derived that is a function of the following parameters: relay location, relative transmit power allocation amongst th..