Full-duplex Wireless Communications

Just as Dickens wrote, it is the best of times, it is the worst of times. Ever increasing traffic demands will bring us into the era of 5G. Vast of unprecedented or even unanticipated fancy wireless applications will definitely change our life. Regarding the beautiful visions promised by 5G, meanwhile the wireless engineers are faced with unprecedented challenges and pressures for realizing much higher spectrum efficiency and energy efficiency compared to the existing 4G communication systems. In order to fill the gap between envision and practice, the blueprint of 5G sits on a series of pillars, e.g., massive MIMO, full duplex communications, dense networks, and high frequency communications. It is worth noting that the application of each candidate technology needs huge research efforts and many technical bottlenecks in both theoretical and implementation categories should be solved first. This issue is dedicated to full duplex communications that are capable of realizing information transmissions and receptions in the same frequency band and at the same time. Nowadays, because of its high spectrum efficiency full duplex communications have gained lots of attention from wireless research society and it is really a hot and fruitful research topic. Therefore, the editors believe it is necessary and also important to construct a special issue of full duplex communications.