Consumption Factor Optimization for Multihop Relaying over Nakagami-m Fading channels

TL;DR

This paper investigates energy efficiency in multihop relaying over Nakagami-m channels using the consumption factor metric, deriving closed-form expressions and proposing power allocation strategies to optimize energy use.

Contribution

It introduces a novel power allocation method maximizing the consumption factor and provides low complexity algorithms with validated performance improvements.

Findings

Proposed power allocation schemes outperform existing methods in energy efficiency.

Closed-form expressions for consumption factor are derived for both amplify-and-forward and decode-and-forward relaying.

Simulation results confirm the effectiveness of the proposed strategies.

Abstract

In this paper, the energy efficiency of multihop relaying over Nakagami-$m$ fading channels is investigated. The "consumption factor" is used as a metric to evaluate the energy efficiency, and it is derived in closed-form for both amplify-and-forward and decode-and-forward relaying. Then, based on the obtained expressions, we propose a power allocation strategy maximizing the consumption factor. In addition, two sub-optimal, low complexity, power allocation algorithms are proposed and analyzed, and the obtained power allocation schemes are compared, in terms of energy efficiency as well as other common performance metrics, to other power allocation schemes from the literature. Analytical and simulation results confirm the accuracy of our derivations, and assess the performance gains of the proposed approach.