| Presentation | 2005/2/25 A Study on Orthogonalization of Up-Link MC-CDMA Systems Atsushi NAGATE, Noboru IIZUKA, Teruya FUJII, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Time-domain spreading MC-CDMA systems have been proposed for the down-link of the 4th generation mobile communication system. In the down-link high communication quality and capacity can be attained because the orthogonality among users is kept. This paper proposes a time-domain spreading MC-CDMA system for the up-link. In the proposed system, the up-link signals of users are synchronized in the time domain using a time-alignment technique so that the orthogonality among users can be kept. As a result, high communication quality and capacity can be attained in the up-link as well as the down-link. In the proposed system, the orthogonality among users is reduced by a timing synchronization error and a carrier frequency offset. In the paper, through a computer simulation, we evaluated the effect of carrier frequency offset, which causes inter-carrier interference and inter-code interference. As the result, we clarified that the proposed up-link system shows good performance while the carrier frequency offset is under 50Hz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile Communications / MC-CDMA / Time-domain Spreading / Up-link / Orthogonalization |
| Paper # | WBS2004-133,A・P2004-314,RCS2004-401,MoMuC2004-184,MW2004-311 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2005/2/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Orthogonalization of Up-Link MC-CDMA Systems |
| Sub Title (in English) | |
| Keyword(1) | Mobile Communications |
| Keyword(2) | MC-CDMA |
| Keyword(3) | Time-domain Spreading |
| Keyword(4) | Up-link |
| Keyword(5) | Orthogonalization |
| 1st Author's Name | Atsushi NAGATE |
| 1st Author's Affiliation | Information & Communication Labs., Japan Telecom() |
| 2nd Author's Name | Noboru IIZUKA |
| 2nd Author's Affiliation | Information & Communication Labs., Japan Telecom |
| 3rd Author's Name | Teruya FUJII |
| 3rd Author's Affiliation | Information & Communication Labs., Japan Telecom |
| Date | 2005/2/25 |
| Paper # | WBS2004-133,A・P2004-314,RCS2004-401,MoMuC2004-184,MW2004-311 |
| Volume (vol) | vol.104 |
| Number (no) | 680 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |