| Presentation | 2022-11-08 Detecting quasi-zenith satellite L1S signals with its null message Satoshi Takahashi, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The quasi-zenith satellite, Michibiki, not only broadcasts the L1C/A positioning signal, but also the L1S signal, which improves its accuracy and conveys disaster information. Receiving L1S signals in addition to L1C/A signal provides us with the disaster information as well as more accurate coordinates. Since the rough position is known to the receiver, here we consider obtaining disaster information by receiving only the L1S signal. Since the L1S message is convolutionally coded and broadcast without termination, the preamble cannot be detected with the L1S signal reception only and the frame synchronization cannot also be performed. After all, L1C/A signal reception has been needed for L1S signal reception. However, only for a null message in which fixed information is transmitted, we can predict the bit string after being scrambled. Therefore, a method of detecting L1S frame synchronization using the null messages is proposed in this report. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | GNSS / QZSS / Michibiki / disaster and crisis management report / L1S signal / frame synchronization |
| Paper # | SR2022-61 |
| Date of Issue | 2022-10-31 (SR) |
| Conference Information | |
| Committee | SR |
|---|---|
| Conference Date | 2022/11/7(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Fukuoka University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Software Defined Radio, Cognitive Radio, Spectrum Sharing, etc. |
| Chair | Suguru Kameda(Hiroshima Univ.) |
| Vice Chair | Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) |
| Secretary | Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokai Univ.) / Kazuto Yano(NTT) |
| Assistant | Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Katsuya Suto(Univ. of Electro-Comm) |
| Paper Information | |
| Registration To | Technical Committee on Smart Radio |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Detecting quasi-zenith satellite L1S signals with its null message |
| Sub Title (in English) | |
| Keyword(1) | GNSS |
| Keyword(2) | QZSS |
| Keyword(3) | Michibiki |
| Keyword(4) | disaster and crisis management report |
| Keyword(5) | L1S signal |
| Keyword(6) | frame synchronization |
| 1st Author's Name | Satoshi Takahashi |
| 1st Author's Affiliation | Hiroshima City University(Hiroshima City Univ.) |
| Date | 2022-11-08 |
| Paper # | SR2022-61 |
| Volume (vol) | vol.122 |
| Number (no) | SR-243 |
| Page | pp.pp.91-93(SR), |
| #Pages | 3 |
| Date of Issue | 2022-10-31 (SR) |