Outage Performance Analysis of Multicarrier Relay Selection for Cooperative Networks

TL;DR

This paper evaluates the outage performance of multicarrier relay selection schemes in OFDM systems, considering various forwarding protocols, and provides analytical expressions verified by simulations.

Contribution

It offers the first comprehensive analytical framework for outage analysis of multicarrier relay selection with multiple forwarding protocols.

Findings

Closed-form outage probability expressions derived.

Asymptotic outage probability analyzed at high SNR.

Simulation results confirm analytical accuracy.

Abstract

In this paper, we analyze the outage performance of two multicarrier relay selection schemes, i.e. bulk and per-subcarrier selections, for two-hop orthogonal frequency-division multiplexing (OFDM) systems. To provide a comprehensive analysis, three forwarding protocols: decode-and-forward (DF), fixed-gain (FG) amplify-and-forward (AF) and variable-gain (VG) AF relay systems are considered. We obtain closed-form approximations for the outage probability and closed-form expressions for the asymptotic outage probability in the high signal-to-noise ratio (SNR) region for all cases. Our analysis is verified by Monte Carlo simulations, and provides an analytical framework for multicarrier systems with relay selection.