Area spectral efficiency of infrastructure-relay enhanced single-cell wireless systems

This paper investigates the area spectral efficiency (ASE) of infrastructure-relay enhanced single-cell wireless system. ASE serves as an attractive alternative performance metric by taking into account of the relatively smaller spatial footprint of relay transmission steps. We extend the notion of ASE into relay transmission scenario and derive its accurate mathematical expressions as a function of the coverage distances and transmitting power of both the BS and RSs with the consideration of the random user locations and the impact of path loss and fading effect. We show through selected numerical examples that the relay enhanced systems have the potential to achieve much better ASE performance over the conventional systems.