Taichi: Signal Dodging and Interference Guiding

Abstract

With the rapid development of wireless technologies, interference has become a main impediment to network performance, making interference management (IM) a critical issue that warrants a thorough investigation. In this paper, we propose a novel IM technique, called signal dodging and interference guiding (SDIG). With this method, we first intellectually move the data transmission away from the interference, hence can partially avoid the influence of disturbance to the desired signal. Then, we employ existing IM method, including zero-forcing (ZF) reception, interference alignment (IA), interference steering (IS), and etc., to further eliminate the interference. The SDIG consists of two phases, the first one is modifying the desired signal while the second is mitigating the interference. This is similar to the idea of Taichi in that both involve the actions of passive defense and active attack. Therefore, we also use the term Taichi as an equivalent for SDIG. Our in-depth simulation has shown that with the proposed scheme, both the interfered user's and the system's spectral efficiency can be significantly improved.