Full-Duplex Systems Using Multi-Reconfigurable Antennas

TL;DR

This paper introduces a full-duplex system using a multi-reconfigurable antenna that achieves significant self-interference suppression, enabling near doubling of data rates in indoor environments.

Contribution

It presents the first full-duplex system with a multi-reconfigurable antenna and demonstrates its effectiveness through comprehensive experimental analysis.

Findings

Achieves 95dB self-interference cancellation with 1% training overhead.

Demonstrates 90% full-duplex rate improvement over half-duplex systems.

Uses a 4096-pattern MRA for dynamic reconfiguration.

Abstract

Full-duplex systems are expected to achieve 100% rate improvement over half-duplex systems if the self-interference signal can be significantly mitigated. In this paper, we propose the first full-duplex system utilizing Multi-Reconfigurable Antenna (MRA) with ?90% rate improvement compared to half-duplex systems. MRA is a dynamically reconfigurable antenna structure, that is capable of changing its properties according to certain input configurations. A comprehensive experimental analysis is conducted to characterize the system performance in typical indoor environments. The experiments are performed using a fabricated MRA that has 4096 configurable radiation patterns. The achieved MRA-based passive self-interference suppression is investigated, with detailed analysis for the MRA training overhead. In addition, a heuristic-based approach is proposed to reduce the MRA training overhead. The results show that at 1% training overhead, a total of 95dB self-interference cancellation is achieved in typical indoor environments. The 95dB self-interference cancellation is experimentally shown to be sufficient for 90% full-duplex rate improvement compared to half-duplex systems.