Simple and Efficient LoRa Receiver Scheme for Multi-Path Channel - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue IEEE Internet of Things Journal Année : 2022

Simple and Efficient LoRa Receiver Scheme for Multi-Path Channel

Résumé

This paper presents a novel LoRa (Long Range) receiver operating in frequency selective Multi-Path Channel (MPC). The dechirped received LoRa wave-forms under MPC allows us to derive a simple and efficient LoRa receiver scheme by using a MF (Matched Filter) approach that aims to maximize the SNR (Signal-to-Noise Ratio) at the symbol index frequency of the DFT output. We show that the MF receiver can be seen as RAKE structure where interference peaks related to multipath, exhibited at DFT output, are recombined in a constructive way. Detection performance is driven by channel energy and the benefit of this novel MF/RAKE receiver over original coherent and non-coherent receiver appears only for MPC that exhibits significant paths energy. These two MF and RAKE receivers have however different implementation complexities that are studied in details. We provide in that sense recommendations on which receiver variant to use for real operations, depending on complexity constraints. Finally, the proposed MF/RAKE receiver outperforms previous results on TDEL (Time Delay Estimation LoRa) receiver over MPC, especially at low SNR and higher LoRa Spreading Factor (SF) parameter, at the cost of higher but reasonable complexity.
Fichier principal
Vignette du fichier
Simple_and_Efficient_LoRa_Receiver_Scheme_for_Multi-Path_Channel.pdf (1.02 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03613269 , version 1 (18-03-2022)

Identifiants

Citer

Clement Demeslay, Philippe Rostaing, Roland Gautier. Simple and Efficient LoRa Receiver Scheme for Multi-Path Channel. IEEE Internet of Things Journal, 2022, pp.1-1. ⟨10.1109/JIOT.2022.3151257⟩. ⟨hal-03613269⟩
26 Consultations
190 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More