| Presentation | 2001/10/16 Current Status of NeLS Project : A Study of Global Multimedia Mobile Satellite Communications Ryutaro SUZUKI, Iwao NISHIYAMA, Shigeru MOTOYOSHI, Yasuhiko YASUDA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | NeLS Research Center was formed in the end of 1997, and started the key technology developments of the low earth orbit constellation system for global multimedia mobile satellite communications service. For tje NeLS constellation, 120 satellites with 1200 km of satellite altitude, was selected. For the satellite antenna developments, the digital beam forming technology was employed. In order to reduce the SSPA power consumption and to keep good linearity, novel pre-distortion type and distortion feedback type linearizer were developed. For the optical ISL system, the optical modem and optical tracking mechanism were developed. The optical DPSK/differential detection modem was evaluated. For the optical antenna mechanism, Coude type, the elbow type and the active universal joint type of optical antenna mechanism were developed. For the satellite network study, the satellite ATM network simulator was developed. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LEO / Satellite Constellation / Mobile Satellite Communication / Optical ISL / DBF antenna |
| Paper # | SAT2001-48 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2001/10/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Satellite Telecommunications (SAT) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Current Status of NeLS Project : A Study of Global Multimedia Mobile Satellite Communications |
| Sub Title (in English) | |
| Keyword(1) | LEO |
| Keyword(2) | Satellite Constellation |
| Keyword(3) | Mobile Satellite Communication |
| Keyword(4) | Optical ISL |
| Keyword(5) | DBF antenna |
| 1st Author's Name | Ryutaro SUZUKI |
| 1st Author's Affiliation | Next-generation LEO System Research Center() |
| 2nd Author's Name | Iwao NISHIYAMA |
| 2nd Author's Affiliation | Next-generation LEO System Research Center |
| 3rd Author's Name | Shigeru MOTOYOSHI |
| 3rd Author's Affiliation | Next-generation LEO System Research Center |
| 4th Author's Name | Yasuhiko YASUDA |
| 4th Author's Affiliation | Waseda University |
| Date | 2001/10/16 |
| Paper # | SAT2001-48 |
| Volume (vol) | vol.101 |
| Number (no) | 379 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |