A 5G-Enabling Technology: Benefits, Feasibility, and Limitations of In-Band Full-Duplex mMIMO

The substantial growth in mobile Internet and Internet of Things traffic has made system capacity enhancement the most important requirement for next-generation mobile communication systems. Massive multiple-input, multiple-output (mMIMO) is a key technology for fulfilling the traffic requirements because of its strong potential to boost spectral efficiency (SE). However, the uplink and downlink of mMIMO usually operate in time-division duplex (TDD) or frequency-division duplex (FDD), which results in an insufficient utilization of time-frequency resources.