Loop-Back Interference Suppression for OFDM Signals via Sampled-Data Control

TL;DR

This paper introduces a sampled-data $H^{ ablafty}$ control approach to suppress loop-back interference in OFDM signals within full-duplex relay stations, ensuring system stability and interference reduction.

Contribution

It presents a novel sampled-data $H^{ ablafty}$ control design method for interference suppression and system stabilization in OFDM full-duplex relay systems.

Findings

Effective interference suppression demonstrated through simulations

Ensures stability of the closed-loop system

Applicable to OFDM signals in full-duplex relay stations

Abstract

In this article, we consider the problem of loop-back interference suppression for orthogonal frequency division multiplexing (OFDM) signals in amplify-and-forward single-frequency full-duplex relay stations. The loop-back interference makes the system a closed-loop system, and hence it is important not only to suppress the interference but also to stabilize the system. For this purpose, we propose sampled-data $H^{\infty}$ design of digital filters that ensure the stability of the system and suppress the continuous-time effect of interference at the same time. Simulation results are shown to illustrate the effectiveness of the proposed method.