Cellular Systems with Full-Duplex Amplify-and-Forward Relaying and Cooperative Base-Stations

TL;DR

This paper analyzes the advantages of multi-cell processing with full-duplex relay terminals in cellular systems, demonstrating potential performance improvements through analytical and numerical methods within a simplified Wyner model.

Contribution

It introduces a model with full-duplex relay terminals receiving adjacent transmissions, providing analytical derivation of sum-rate improvements over single-cell processing.

Findings

Multi-cell processing with relays enhances sum-rate performance.

Full-duplex relay operation offers significant benefits over half-duplex.

Analytical results confirm the advantages in simplified Wyner model.

Abstract

In this paper the benefits provided by multi-cell processing of signals transmitted by mobile terminals which are received via dedicated relay terminals (RTs) are assessed. Unlike previous works, each RT is assumed here to be capable of full-duplex operation and receives the transmission of adjacent relay terminals. Focusing on intra-cell TDMA and non-fading channels, a simplified uplink cellular model introduced by Wyner is considered. This framework facilitates analytical derivation of the per-cell sum-rate of multi-cell and conventional single-cell receivers. In particular, the analysis is based on the observation that the signal received at the base stations can be interpreted as the outcome of a two-dimensional linear time invariant system. Numerical results are provided as well in order to provide further insight into the performance benefits of multi-cell processing with relaying.