Energy-Efficient Massive MIMO: Wireless-Powered Communication, Multiuser MIMO with Hybrid Precoding, and Cloud Radio Access Network with Variable-Resolution ADCs

Deployment of connectivity solutions in rural communities faces many practical challenges. Lack of availability and access to reliable electricity sources is one of the major hindrancesfor rural connectivity, particularly in underdeveloped countries. As such, wireless connectivity solutions for such applications must focus on low-power hardware operations and high energy efficiency (EE). Many novel approaches have been taken to increase EE in wireless networks. The massive multiple input/multiple output (MIMO) architecture [6] has shown particular promise in this regard. The building block of a massive MIMO system is a multiantenna base station (BS) concurrently serving many single-antenna users, where the number of BS antennas is much larger than the number of users.