Performance of SWIPT-based Differential Amplify-and-Forward Relaying with Direct Link

TL;DR

This paper derives asymptotic closed-form expressions for the probability density function and average bit-error rate of a SWIPT-based differential amplify-and-forward relay system with a direct link, verified by simulations.

Contribution

It introduces a novel asymptotic pdf for the two-hop link and provides new analytical BER expressions for the system with direct link combining.

Findings

Analytical BER expressions match simulation results.

Derived asymptotic pdf improves understanding of system performance.

Results demonstrate the effectiveness of the proposed analytical approach.

Abstract

A novel asymptotic closed-form probability density function (pdf) of the two-hop (TH) link is derived for a simultaneous wireless information and power transfer based differential amplify-and-forward system. Based on the pdf, asymptotic closed-form average bit-error rate expressions of the single TH link and the TH link with direct link combined with a linear combining scheme are both derived. Monte Carlo simulations verify the analytical expressions.