| Presentation | 2003/7/10 Scattered Pilot OFDM Reception Employing Turbo Interference Cancellation for ICI Caused by Fast Fading Fluctuations Masafumi ITO, Satoshi SUYAMA, Kazuhiko FUKAWA, Hiroshi SUZUKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In fast varying fading environments of mobile communications, OFDM signal transmissions suffer from severe degradation due to Inter Carrier Interference (ICI), because the Doppler shift destroys orthogonality between each subcarrier. To alleviate such ICI, this report proposes a scattered-pilot-OFDM reception scheme with turbo ICI cancellation. The proposed receiver consists of (i) a coherent detection unit, (ii) a turbo ICI cancellation unit, and (iii) a decoder of a channel code. Initially, the receiver performs a coherent detection mode by the combination of (i) and (ii). When a decision error is detected, it shifts from the coherent detection mode to a turbo ICI cancellation mode that carries out both the cancellation of ICI and the channel estimation by using the decoder output, that is, the Log Likelihood Ratio (LLR). Iterating the channel estimation, the interference cancellation, and the decoding, can achieve an excellent ICI cancellation performance. Computer simulations following the mobile reception in Digital Terrestrial Television Broadcasting demonstrate that the proposed receiver can effectively cancel ICI due to the fast varying fading, and that it is much superior to the coherent detection in the average BER performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mobile communications / OFDM / scattered-pilot / ICI / turbo ICI cancellation / decision directed channel estimation |
| Paper # | NS2003-51,RCS2003-74 |
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| Conference Information | |
| Committee | NS |
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| Conference Date | 2003/7/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Network Systems(NS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Scattered Pilot OFDM Reception Employing Turbo Interference Cancellation for ICI Caused by Fast Fading Fluctuations |
| Sub Title (in English) | |
| Keyword(1) | Mobile communications |
| Keyword(2) | OFDM |
| Keyword(3) | scattered-pilot |
| Keyword(4) | ICI |
| Keyword(5) | turbo ICI cancellation |
| Keyword(6) | decision directed channel estimation |
| 1st Author's Name | Masafumi ITO |
| 1st Author's Affiliation | Tokyo Institute of Technology() |
| 2nd Author's Name | Satoshi SUYAMA |
| 2nd Author's Affiliation | Tokyo Institute of Technology |
| 3rd Author's Name | Kazuhiko FUKAWA |
| 3rd Author's Affiliation | Tokyo Institute of Technology |
| 4th Author's Name | Hiroshi SUZUKI |
| 4th Author's Affiliation | Tokyo Institute of Technology |
| Date | 2003/7/10 |
| Paper # | NS2003-51,RCS2003-74 |
| Volume (vol) | vol.103 |
| Number (no) | 201 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |