A Survey on Random Access Protocols in Direct-Access LEO Satellite-Based IoT Communication

TTT Le, NUL Hassan, X Chen… - … Surveys & Tutorials, 2024 - ieeexplore.ieee.org
Low-Earth orbit (LEO) satellites can play an important role in providing seamless coverage
for the Internet of Things (IoT). In satellite-based IoT (SIoT) networks, IoT devices can …

A tutorial on chirp spread spectrum for LoRaWAN: Basics and key advances

A Maleki, HH Nguyen, E Bedeer, R Barton - arXiv preprint arXiv …, 2023 - arxiv.org
Chirps spread spectrum (CSS) modulation is the heart of long-range (LoRa) modulation
used in the context of long-range wide area network (LoRaWAN) in internet of things (IoT) …

Outage probability analysis of LR-FHSS and D2D-aided LR-FHSS protocols in shadowed-Rice fading direct-to-satellite IoT networks

A Maleki, HH Nguyen, E Bedeer… - IEEE Internet of Things …, 2023 - ieeexplore.ieee.org
In this article, we present a device-to-device (D2D) transmission scheme for aiding long-
range frequency-hopping spread spectrum (LR-FHSS) LoRaWAN protocol with application …

Architectural framework and feasibility of internet of things-driven mars exploration via satellite constellations

O Ledesma, P Lamo, JA Fraire, M Ruiz, MA Sánchez - Electronics, 2024 - mdpi.com
This study outlines a technical framework for Internet of Things (IoT) communications on
Mars, leveraging Long Range (LoRa) technology to connect Martian surface sensors and …

Recovering headerless frames in LR-FHSS

JA Fraire, A Guitton, O Iova - arXiv preprint arXiv:2306.08360, 2023 - arxiv.org
Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) is a recent modulation
designed for communications from low-power ground end-devices to Low-Earth Orbit (LEO) …

Asynchronous Contention Resolution-Aided ALOHA in LR-FHSS Networks

JM de Souza Sant'Ana, O da Silva Neto… - IEEE Internet of …, 2024 - ieeexplore.ieee.org
In this work, we apply an asynchronous contention resolution-aided ALOHA protocol to the
recently proposed long-range frequency hopping spread spectrum (LR-FHSS) scheme …

D2D-aided LoRaWAN LR-FHSS in direct-to-satellite IoT networks

A Maleki, HH Nguyen, E Bedeer, R Barton - arXiv preprint arXiv …, 2022 - arxiv.org
In this paper, we present a device-to-device (D2D) transmission scheme for aiding long-
range frequency hopping spread spectrum (LR-FHSS) LoRaWAN protocol with application …

Transceiver Design and Performance Analysis for LR-FHSS-based Direct-to-Satellite IoT

S Jung, S Jeong, J Kang, JG Ryu… - IEEE Communications …, 2023 - ieeexplore.ieee.org
This letter presents a novel transceiver design aimed at enabling Direct-to-Satellite Internet
of Things (DtS-IoT) systems based on the long-range frequency-hopping spread spectrum …

Design of a Deployable Broadband Mesh Reflector Antenna for a SIGINT Satellite System Considering Surface Shape Deformation

C Im, W Seo, S Park, K Kim, S Park, H Choo - Sensors, 2024 - mdpi.com
In this paper, we propose a deployable broadband mesh reflector antenna for use in signals
intelligence (SIGINT) satellite systems, considering performance degradation due to shape …

LR-FHSS-Sim: A Discrete-Event Simulator for LR-FHSS Networks

JMSS Ana, A Hoeller Jr, H Alves, RD Souza - arXiv preprint arXiv …, 2024 - arxiv.org
This work presents the LR-FHSS-Sim, a free and open-source discrete-event simulator for
LR-FHSS networks. We highlight the importance of network modeling for IoT coverage …