The paper "In-Band Full-Duplex Wireless: Challenges and Opportunities" by Ashutosh Sabharwal et al. reviews the concept of in-band full-duplex (IBFD) wireless communication, which allows a terminal to transmit and receive simultaneously over the same frequency band, potentially doubling spectral efficiency. The main challenge in IBFD is self-interference, where the transmitted signal interferes with the desired reception. The authors discuss various techniques to mitigate self-interference, including propagation-domain, analog-circuit-domain, and digital-domain approaches. They also explore the potential benefits of IBFD in different network topologies, such as relay, bidirectional, and base station configurations, and highlight the expanded design space it offers for protocol design. The paper concludes by outlining key research challenges and opportunities, particularly in antenna and circuit design for small-form-factor devices.The paper "In-Band Full-Duplex Wireless: Challenges and Opportunities" by Ashutosh Sabharwal et al. reviews the concept of in-band full-duplex (IBFD) wireless communication, which allows a terminal to transmit and receive simultaneously over the same frequency band, potentially doubling spectral efficiency. The main challenge in IBFD is self-interference, where the transmitted signal interferes with the desired reception. The authors discuss various techniques to mitigate self-interference, including propagation-domain, analog-circuit-domain, and digital-domain approaches. They also explore the potential benefits of IBFD in different network topologies, such as relay, bidirectional, and base station configurations, and highlight the expanded design space it offers for protocol design. The paper concludes by outlining key research challenges and opportunities, particularly in antenna and circuit design for small-form-factor devices.