Performance Analysis of a Two-Hop Relaying LoRa System

TL;DR

This paper analyzes a two-hop relaying LoRa system that improves reliability and coverage over fading channels, using relay selection and asymptotic analysis to evaluate performance.

Contribution

It introduces a two-hop opportunistic relaying scheme for LoRa, deriving analytical expressions for key performance metrics over Nakagami fading channels.

Findings

Significant BER and coverage probability improvements.

Reduced throughput compared to conventional LoRa.

Potential for low-power, long-range reliable communication.

Abstract

The conventional LoRa system is not able to sustain long-range communication over fading channels. To resolve the challenging issue, this paper investigates a two-hop opportunistic amplify-and-forward relaying LoRa system. Based on the best relay-selection protocol, the analytical and asymptotic bit error rate (BER), achievable diversity order, coverage probability, and throughput of the proposed system are derived over the Nakagamim fading channel. Simulative and numerical results show that although the proposed system reduces the throughput compared to the conventional LoRa system, it can significantly improve BER and coverage probability. Hence, the proposed system can be considered as a promising platform for low-power, long-range and highly reliable wireless-communication applications.