Self-Interference Cancellation Based on Frequency Non-Uniform Response Channel for In-Band Full-Duplex wireless

In-band full-duplex technology attracts a lot of attention due to its double frequency effect advantage. However, the self-interference suppression problem has become the key to the realization of this technology. Self-interference suppression is based on our understanding of the transceiver system. When we have the ability to model high-precision nonlinear transceiver systems, we can deal with this challenge. This paper proposes a self-interference cancellation scheme and a self-interference cancellation algorithm, builds a more comprehensive RF nonlinear system, and deduces the limit performance of this method. Numerical simulation verification was carried out in two application scenarios of Rician channel and phased array S-parameter channel. The simulation results show that this method has a more ideal comprehensive performance of self-interference cancellation. The method proposed in this paper provides new ideas for the development of in-band full-duplex technology.