Results 1 to 10 of about 59 (54)
Energy Performance of LR-FHSS: Analysis and Evaluation [PDF]
SensorsLong-range frequency hopping spread spectrum (LR-FHSS) is a pivotal advancement in the LoRaWAN protocol that is designed to enhance the network’s capacity and robustness, particularly in densely populated environments.
Lluís Casals Ibanez +2 more
exaly +4 more sources
Experimental Evaluation of LR-FHSS: A Comparison with LoRa [PDF]
SensorsLong-Range Frequency Hopping Spread Spectrum (LR-FHSS) is the newest modulation in LoRaWAN, designed to overcome the scalability and coverage limits of conventional LoRa. This study provides a real-world evaluation of LR-FHSS performance, benchmarking it
Lluís Casals Ibanez +2 more
exaly +4 more sources
Internet of Things Node with Real-Time LoRa GEO Satellite Connectivity for Agrifood Chain Tracking in Remote Areas [PDF]
SensorsThis work presents an Internet of Things (IoT) node designed for low-power agrifood chain tracking in remote areas, where long-range terrestrial communication is either unavailable or severely limited.
Giacomo Giannetti +6 more
doaj +2 more sources
Uplink Transmission Policies for LoRa-Based Direct-to-Satellite IoT
IEEE Access, 2022 Direct-to-Satellite IoT (DtS-IoT) is a promising approach to deliver data transfer services to IoT devices in remote areas where deploying terrestrial infrastructure is not appealing or feasible.
Guido Alvarez +4 more
doaj +1 more source
A Multiple‐Access Time and Frequency Spectrum‐Spreading Modulation
Wireless Communications and Mobile Computing, Volume 2018, Issue 1, 2018., 2018 In this paper a novel modulation scheme called Carrier Interleaved Multiple Access (CIMA) is proposed. CIMA provides an alternative for multiple‐access modulation accommodating resistance to noise and channel interference. The approach is based on polar signaling modulated with an FM‐like composite sinusoidal function.
Samer S. Saab +3 more
wiley +1 more source
Construction of Optimal Sets of Frequency Hopping Sequences
International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013 Frequency hopping spread spectrum and direct sequence spread spectrum are two main spread coding technologies. Frequency hopping sequences are needed in FH‐CDMA systems. In this paper, a construction of optimal sets of frequency hopping sequences is presented.
Bin Wen, C. da Fonseca, A. V. Kelarev
wiley +1 more source
Emerging Information Science and TechnologySome factors that need to be developed in the LoRaWAN satellite communication system are using LR-FHSS (Long Range-Frequency Hoppong Spread Spectrum) to increase resistance to frequency interference and jamming, with the technique of using a small ...
Puput Adi, Kevin Stekelorom
doaj +1 more source
IEEE Open Journal of Vehicular TechnologyThis paper proposes a long range-frequency hopping spread spectrum (LR-FHSS) transceiver design for the Direct-to-Satellite Internet of Things (DtS-IoT) communication system.
Sooyeob Jung +7 more
doaj +1 more source
Toward Improving the Scalability of LR-FHSS: Transmission Policies and Performance Analysis
IEEE Open Journal of the Communications SocietyLow power wide area networks (LPWANs) have revolutionized IoT connectivity by enabling long-range communication with low cost end devices and minimal power consumption.
Lucas Bez Rocha +5 more
doaj +1 more source
Probabilistic Allocation of Payload Code Rate and Header Copies in LR-FHSS Networks
IEEE AccessWe evaluate the performance of the LoRaWAN Long-Range Frequency Hopping Spread Spectrum (LR-FHSS) technique using a device-level probabilistic strategy for code rate and header replica allocation.
Jamil de Araujo Farhat +5 more
doaj +1 more source