In-Band Full-Duplex Wireless: Challenges and Opportunities

TL;DR

This paper reviews in-band full-duplex wireless technology, focusing on self-interference challenges and mitigation techniques, and discusses future research opportunities to enhance wireless system throughput.

Contribution

It provides a comprehensive overview of IBFD wireless concepts, challenges, and mitigation methods, highlighting recent advances and open research directions.

Findings

Self-interference is the main obstacle to IBFD implementation.

Various mitigation techniques can significantly reduce self-interference.

IBFD has the potential to double wireless network capacity.

Abstract

In-band full-duplex (IBFD) operation has emerged as an attractive solution for increasing the throughput of wireless communication systems and networks. With IBFD, a wireless terminal is allowed to transmit and receive simultaneously in the same frequency band. This tutorial paper reviews the main concepts of IBFD wireless. Because one the biggest practical impediments to IBFD operation is the presence of self-interference, i.e., the interference caused by an IBFD node's own transmissions to its desired receptions, this tutorial surveys a wide range of IBFD self-interference mitigation techniques. Also discussed are numerous other research challenges and opportunities in the design and analysis of IBFD wireless systems.