| Presentation | 2023-10-19 Fractional Spreading Factor for LoRa Signals and Its Demodulation Algorithm Ryoya Saito, Koichi Adachi, Takeo Fujii, Ryota Kumada, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, long-range wide area network (LoRaWAN), a low power wide area network (LPWAN) technology that facilitates long-range and low-power communication, has been attracting attention with the development of the Internet-of-things (IoT). This paper introduces a concept of non-integer spreading factor (FSF) to LoRa modulation for system throughput improvement. In the proposed FSF-LoRa, a fractional coefficient is introduced for changing the chip length of the LoRa signal, which realizes equivalent FSF. To mitigate the self-interference of the FSF-LoRa signal, this paper also proposes a demodulation algorithm that takes into account the structure of FSF-LoRa signal. The computer simulation results elucidate that the proposed FSF-LoRa can improve the system throughput by 14% compared to the original LoRa under an inter-spreading factor interference environment. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LPWAN / LoRaWAN / LoRa / IoT |
| Paper # | RCS2023-129 |
| Date of Issue | 2023-10-12 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2023/10/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kagawa University (Saiwai-cho Campus), and online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Wireless Communication Schemes, Wireless Communication Systems, Wireless Standards, Future Wireless Systems, etc. |
| Chair | Kenichi Higuchi(Tokyo Univ. of Science) |
| Vice Chair | Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) / Naoto Ishii(NEC) |
| Secretary | Fumihide Kojima(Univ. of Electro-Comm) / Osamu Muta(Sharp) / Naoto Ishii(Mitsubishi Electric) |
| Assistant | Masashi Iwabuchi(NTT) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) / Kazuki Maruta(Tokyo Univ. of Science) / Kiichi Tateishi(NTT Docomo) |
| Paper Information | |
| Registration To | Technical Committee on Radio Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fractional Spreading Factor for LoRa Signals and Its Demodulation Algorithm |
| Sub Title (in English) | |
| Keyword(1) | LPWAN |
| Keyword(2) | LoRaWAN |
| Keyword(3) | LoRa |
| Keyword(4) | IoT |
| 1st Author's Name | Ryoya Saito |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Koichi Adachi |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| 3rd Author's Name | Takeo Fujii |
| 3rd Author's Affiliation | The University of Electro-Communications(UEC) |
| 4th Author's Name | Ryota Kumada |
| 4th Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2023-10-19 |
| Paper # | RCS2023-129 |
| Volume (vol) | vol.123 |
| Number (no) | RCS-224 |
| Page | pp.pp.7-12(RCS), |
| #Pages | 6 |
| Date of Issue | 2023-10-12 (RCS) |