| Presentation | 2004/2/27 Interference Canceller for MC-CDMA Downlink to Reduce Effect of Multi-path Wave with Delay Time Exceeding Guard Interval in Presence of Output Power Difference among Users Noboru IZUKA, Teruya FUJII, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In a mobile communication system with MC-CDMA, a multi-path effect can be reduced by addition of a guard interval to a transmitted symbol. However, a multi-path wave with a delay time exceeding the guard interval degrades the error rate performance. In this paper, we propose a multi-path interference canceller with multi-user demodulation to improve the error rate performance for downlink in the system. The proposed canceller demodulates signals of all users in a cell, and decides the obtained symbols of the users. A received signal replica is generated with the decision results. An interference level can be reduced by an exchange of interfered samples with the replica samples. We estimate a required control range of relative output power for downlink in the system through a computer simulation, considering output power difference among the users. The simulation results show that the proposed canceller requires that the control range of the relative output power is less than or equal to 6 dB when a multi-path wave has a delay time exceeding double the guard interval. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile Communication Systems / MC-CDM / Guard Interval / Multi-path Interference Canceller |
| Paper # | WBS2003-160,A・P2003-353,RCS2003-376,MoMuC2003-166,MW2003-322 |
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| Conference Information | |
| Committee | WBS |
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| Conference Date | 2004/2/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Wideband System(WBS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Interference Canceller for MC-CDMA Downlink to Reduce Effect of Multi-path Wave with Delay Time Exceeding Guard Interval in Presence of Output Power Difference among Users |
| Sub Title (in English) | |
| Keyword(1) | Mobile Communication Systems |
| Keyword(2) | MC-CDM |
| Keyword(3) | Guard Interval |
| Keyword(4) | Multi-path Interference Canceller |
| 1st Author's Name | Noboru IZUKA |
| 1st Author's Affiliation | Information and Communication Labs., Japan Telecom() |
| 2nd Author's Name | Teruya FUJII |
| 2nd Author's Affiliation | Information and Communication Labs., Japan Telecom |
| Date | 2004/2/27 |
| Paper # | WBS2003-160,A・P2003-353,RCS2003-376,MoMuC2003-166,MW2003-322 |
| Volume (vol) | vol.103 |
| Number (no) | 676 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |