Full-Duplex eNodeB and UE Design for 5G Networks

TL;DR

This paper presents a full-duplex design for 5G eNodeB and user equipment, enabling simultaneous uplink and downlink communication, reducing spectrum use, and employing advanced signal processing techniques for efficient operation.

Contribution

It introduces a novel full-duplex architecture for 5G networks using SVD-based beamforming and MMSE with SSIC-OO for interference management.

Findings

Efficient full-duplex operation demonstrated at both UE and eNB.

Reduced spectrum requirement by enabling simultaneous uplink and downlink.

Simulation results confirm the effectiveness of the proposed design.

Abstract

The recent progress in the area of self-interference cancellation (SIC) design has enabled the development of full-duplex (FD) single and multiple antenna systems. In this paper, we propose a design for FD eNodeB (eNB) and user equipment (UE) for 5G networks. The use of FD operation enables simultaneous in-band uplink and downlink operation and thereby cutting down the spectrum requirement by half. FD operation requires the same subcarrier allocation to UE in both uplink and downlink. Long Term Evolution LTE) uses orthogonal frequency division multiple access (OFDMA) for downlink. To enable FD operation, we propose using single carrier frequency division multiple access SC-FDMA) for downlink along with the conventional method of using it for uplink. Taking advantage of channel reciprocity, singular value decomposition (SVD) based eamforming in the downlink allows multiple users (MU) to operate on same set of subcarriers. In uplink, frequency domain minimum mean square error (MMSE) equalizer along with successive interference cancellation with optimal ordering (SSIC-OO) algorithm is used to decouple signals of users operating in the same set of subcarriers. The work includes simulations showing efficient FD operation both at UE and eNB for downlink and uplink respectively.