Toward a “green” generation of wireless communications systems

Abstract

Green mobile networks are essential to enable sustainable growth of 2 future communications systems. Communication transceivers with reduced-power 3 consumption and high-spectral efficiency will enable suitable connectivity while 4 maintaining user access costs at accessible levels. The term “green” in our case 5 refers to devices of low implementation cost but that is efficient from two points 6 of view: energy consumption and use of radio spectrum. Based on the premise of 7 spectral efficiency, this chapter describes spectrum access techniques, in particular full-duplex and massive communication techniques. It is worth to mention that these AQ1 8 9 techniques are presented in a realistic scenario considering RF front-end imperfec10 tions always present in low-cost units. Furthermore, a performance study of these 11 systems is also presented. On the other hand, in order to improve energy capabilities, the more challenging context of massive MIMO systems is studied.