Sampled-Data H-infinity Design of Coupling Wave Cancelers in Single-Frequency Full-Duplex Relay Stations

TL;DR

This paper introduces a sampled-data H-infinity control approach for designing digital filters that effectively cancel coupling waves in full-duplex relay stations by modeling the system as continuous-time and considering intersample behavior.

Contribution

It presents a novel sampled-data H-infinity design method for coupling wave cancelers, modeling relay stations as continuous-time systems unlike traditional discrete models.

Findings

Effective cancellation of coupling waves demonstrated in simulations

Intersample behavior consideration improves canceler performance

Proposed method outperforms conventional discrete-time approaches

Abstract

In this article, we propose sampled-data H-infinity design of digital filters that cancel the continuous-time effect of coupling waves in a single-frequency full-duplex relay station. In this study, we model a relay station as a continuous-time system while conventional researches treat it as a discrete-time system. For a continuous-time model, we propose digital feedforward and feedback cancelers based on the sampled-data control theory to cancel coupling waves taking intersample behavior into account. Simulation results are shown to illustrate the effectiveness of the proposed method.