In-Band Full-Duplex Wireless Systems Handbook [Book Review

Abstract

The evolution towards a fully connected intelligent digital world as envisioned in the Internet of Everything paradigm, connecting not only people but also computing resources, autonomous vehicles, smart devices, wearables, and even (humanoid) robots, is imposing increasingly stringent requirements on wireless systems. The exploitation of millimeter-wave frequencies and adoption of (massive) multiple-input, multiple-output (MIMO) techniques are key to keep pace with the ever-increasing demands for higher data rates by these next-generation applications. While current (massive) MIMO implementations typically rely on time-division duplexing to ease channel estimation and precoding, they also provide a natural pathway to further upgrade these networks with in-band full-duplex (IBFD) operation, enabling concurrent transmission and reception within the same frequency band, thereby further boosting wireless data rates while dealing efficiently with scarce, and costly, spectral resources. Moreover, an important emerging research area consists of leveraging IBFD to provide novel multifunction capabilities, such as the combination of radar and communication functionality in one system. This is becoming highly relevant following the steep rise in interest in self-driving cars, unmanned aerial vehicles, and cyberphysical systems, all of which need to simultaneously communicate and sense their environment. Hence, the ability of IBFD technology to realize wireless systems that share spectral and hardware resources to simultaneously support multiple functions makes it the technology of the future and will enable it to be adopted into both existing and future-generation networks, paving the way for innovative applications that have not yet been conceived.