Adaptive analog self-interference cancellation for in-band full-duplex wireless communication

Abstract

This paper presents design and experimental demonstration of analog self-interference cancellation (SIC) at 2.4 GHz for Wi-Fi systems. In order to make the system reliable and adaptive, we focused to deal with three key issues; a local optimum, a quantization error, and an adaptive SIC algorithm. We describe the solutions for the challenges and verifies those with simulations and experiments. In this work, we achieved 35.2 dB self-interference cancellation 10 MHz bandwidth at 2.4 GHz with 2 taps configuration.