| Presentation | 2021-04-22 Pilotless Multipath Equalization for Chirp Spread Non-coherent FSK Yuta Hori, Masatsugu Higashinaka, Hiroshi Aruga, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In low power wide area (LPWA) systems such as LoRaWAN (Long Range Wide Area Network), a combination of frequency shift keying (FSK) and direct sequence spread spectrum (DS-SS) with chirp sequence is beneficial due to its high power efficiency and high receiver sensitivity. In general, non-coherent detection is applied to FSK due to its simplicity of implementation. However, employing non-coherent FSK in which the channel estimation and the channel equalization are not performed has a disadvantage that it cannot achieve diversity gain provided by the multipath channel. In addition, the combination of the chirp DS-SS and the non-coherent FSK incurs error floor over the multipath channel with a specific delay profile. In this paper, we propose a new transmission and detection method for the chirp DS-SS with the non-coherent FSK that is able to obtain the multipath diversity gain. Simulation results demonstrate that our proposed scheme achieves higher diversity gain than the conventional non-coherent tranceiver over the multipath channels. Moreover, we show that the proposed scheme improves error rate performance over the multipath channel with the specific delay profile where the conventional scheme suffers from the error floor. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Frequency Shift Keying / Non-coherent Detection / Chirp Sequence / Direct-sequence Spread Spectrum |
| Paper # | RCS2021-8 |
| Date of Issue | 2021-04-15 (RCS) |
| Conference Information | |
| Committee | RCS |
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| Conference Date | 2021/4/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Radio Access Technologies, Wireless Communications, etc. |
| Chair | Eiji Okamoto(Nagoya Inst. of Tech.) |
| Vice Chair | Fumiaki Maehara(Waseda Univ.) / Toshihiko Nishimura(Hokkaido Univ.) / Tomoya Tandai(Toshiba) |
| Secretary | Fumiaki Maehara(Kyushu Univ.) / Toshihiko Nishimura(NEC) / Tomoya Tandai |
| Assistant | Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(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) | Pilotless Multipath Equalization for Chirp Spread Non-coherent FSK |
| Sub Title (in English) | |
| Keyword(1) | Frequency Shift Keying |
| Keyword(2) | Non-coherent Detection |
| Keyword(3) | Chirp Sequence |
| Keyword(4) | Direct-sequence Spread Spectrum |
| 1st Author's Name | Yuta Hori |
| 1st Author's Affiliation | Mitsubishi Electric(MELCO) |
| 2nd Author's Name | Masatsugu Higashinaka |
| 2nd Author's Affiliation | Mitsubishi Electric(MELCO) |
| 3rd Author's Name | Hiroshi Aruga |
| 3rd Author's Affiliation | Mitsubishi Electric(MELCO) |
| Date | 2021-04-22 |
| Paper # | RCS2021-8 |
| Volume (vol) | vol.121 |
| Number (no) | RCS-7 |
| Page | pp.pp.30-35(RCS), |
| #Pages | 6 |
| Date of Issue | 2021-04-15 (RCS) |