Zhang Zhongshan

Key techniques research on full-duplex wireless communications

Traditional half-duplex (HD) wireless systems transmit and receive signals adopting orthogonal time-slots, resulting in a great waste of frequency resources. And full-duplex (FD) wireless communication techniques have drawn extensive attention from academia and industry for the attractive abilities of doubling the channel capacity and promoting the utilization of spectrum resources. We frame the paper by rst comparing the per-formance of HD and FD modes and addressing the advantages and disadvantages of the existing FD techniques. As the core problem of FD systems, self-interference (SI) cancellation will be realized by two main techniques: passive self-interference suppression and active self-interference cancellation. In this paper, we also present the advantages and disadvantages of respective techniques. Besides, the design of FD media access control (FD-MAC) layer is carried out based on the complex time-varying wireless spectrum environment and the dynamic wireless network structure. Furthermore, the design and implement of FD algorithms are presented in this paper, including relay network coding, relay selection and dynamic resource allocation. Finally, we summarize the future research directions and conclude the whole paper.