The on-going increase in the amount of wireless data traffic [Cis15] preserves the demand for higher wireless datarates. The growth in mobile data traffic has increased by 22x between 2010 and 2015 (see Fig. 1.1a), and it is expected to increase by 10x between 2015 and 2021 [Eri15]. Datarates in wireless communications have also increased exponentially, as shown Fig. 1.1b for cellular and wireless LAN standards.