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Analysis of lora communication reliability using gnu radio in simulated LEO satellite channels Muhammad Fathi Irfan; Herwin Melyanus Hutapea; Maulana Ali Arifin; Achmad Darwin
International Journal of Enterprise Modelling Vol. 20 No. 2 (2026): May: Enterprise Modelling
Publisher : International Enterprise Integration Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/int.jo.emod.v20i2.189

Abstract

Low Earth Orbit (LEO) satellite communication using LoRa modulation faces persistent challenges including Doppler frequency shifts, free-space path loss, and synchronization instability that limit communication reliability for satellite-based Internet of Things (IoT) applications. Although LoRa has been widely adopted for terrestrial long-range communication, systematic Software-Defined Radio (SDR) evaluations of LoRa under LEO-like channel impairments remain scarce, particularly studies that simultaneously analyze multiple performance indicators across a complete Spreading Factor (SF) range. This study addresses that gap by proposing a reproducible GNU Radio-based SDR simulation framework that integrates LEO channel impairments (Doppler shift, free-space path loss, and atmospheric attenuation) and simultaneously evaluates Bit Error Rate (BER), Signal-to-Noise Ratio (SNR), and Time on Air (ToA) for 24 SF–CR configurations (SF7–SF12 × CR4/5–CR4/8) at a fixed bandwidth of 125 kHz. The novelty of this work lies in the joint multi-metric SDR assessment of LoRa under satellite-like impairments and the identification of practical SF–CR operating points that balance reliability and efficiency for prospective LEO deployments. The results show that SF7 with CR4/6 and CR4/7 yields the most stable performance, achieving BER as low as 0.01, SNR around −8 to −9 dB, and ToA below 0.03 s, while configurations at SF11–SF12 exhibit severe BER degradation (≥ 0.86) and ToA up to 1.85 s due to synchronization sensitivity under Doppler-affected conditions. These findings provide quantitative guidance for parameter selection in LoRa-based LEO communication systems, particularly the RIDU-Sat development program in Indonesia.
Literature review on the development and trends of battery technology in Indonesia (2020–2025) Ria Aprilianingsih; Uvi Desi Fatmawati; Achmad Darwin; Nahdya Aufa Hayla Anwar; Bayu Nuar Khadapi Hasibuan
International Journal of Enterprise Modelling Vol. 20 No. 2 (2026): May: Enterprise Modelling
Publisher : International Enterprise Integration Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/int.jo.emod.v20i2.195

Abstract

The worldwide shift toward low-carbon energy systems has intensified demand for advanced battery technologies, particularly in the context of electric vehicle (EV) proliferation. Despite Indonesia's strategic position as the world's largest nickel producer  holding approximately 21% of global nickel reserves  comprehensive scholarly synthesis that integrates material innovation, industrial policy, regulatory frameworks, recycling systems, and consumer adoption within a unified analytical framework remains absent from the existing literature. This gap motivates the present study, which employs a Systematic Literature Review (SLR) methodology drawing upon 26 peer-reviewed articles and reports published between 2020 and 2025, sourced from IEEE Xplore, ScienceDirect, SpringerLink, Scopus, and Google Scholar. Thematic content analysis was applied to classify findings across nine interconnected dimensions: battery material evolution, manufacturing investment, charging infrastructure, regulatory challenges, recycling systems, consumer behavior, environmental impact, SWOT analysis, and emerging technologies. The principal contribution of this study lies in constructing an integrated ecosystem mapping of Indonesia's battery industry  a synthesis not previously offered in the literature  revealing that while NMC and LFP lithium-ion technologies have been rapidly adopted and manufacturing capacity is projected to reach 140 GWh by 2030, critical structural weaknesses persist in domestic research capacity, regulatory harmonization, and circular economy implementation. Solid-state and sodium-ion batteries are identified as strategically significant future directions. These findings offer actionable guidance for policymakers, researchers, and industry stakeholders seeking to strengthen Indonesia's long-term competitiveness in the global battery supply chain.