| Presentation | 2008-03-07 On Resolution for Inter-Carrier Interference in OFDM Based on ICA Vithaya SAYVISITH, Tetsuya KIMURA, Fuminari NAKAGAWA, Hiroshi SHIRATUCHI, Naomi HARATANI, Hiromu GOTANDA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Carrier frequency offset (CFO) causes inter-carrier interference (ICI) between the sub-carriers in Orthogonal Frequency Division Multiplexing (OFDM) systems, which degrades the system performance. In this paper, a new approach based on independent component analysis (ICA) is proposed to cancel the ICI, to estimate the flat-fading sub-channel and to restore the transmitted symbols, by using only the received symbols. First, the ICI problem is formulated as an ICA model under the flat-fading sub-channels. Next, the permutation and the scaling indeterminacy inherent in ICA are resolved. Then the CFO is estimated from ICA results. If the flat-fading coefficient takes a phase within ±π/4 at every sub-carrier under QAM type modulation, the coefficient can be estimated by use of the fact that, after CFO cancellation, the receive symbols at each sub-carrier are almost uniformly changed from the transmitted symbols in proportion with the magnitude and the phase of the coefficient. These results are utilized to restore the unknown transmitted symbols. Finally, the proposed method is verified for 16QAM by several simulations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / CFO / ICI / Fading channel / Independent Component Analysis |
| Paper # | CAS2007-129,SIP2007-204,CS2007-94 |
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| Conference Information | |
| Committee | SIP |
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| Conference Date | 2008/2/29(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Signal Processing (SIP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On Resolution for Inter-Carrier Interference in OFDM Based on ICA |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | CFO |
| Keyword(3) | ICI |
| Keyword(4) | Fading channel |
| Keyword(5) | Independent Component Analysis |
| 1st Author's Name | Vithaya SAYVISITH |
| 1st Author's Affiliation | Graduate School of Adcanced Technology, Kinki University() |
| 2nd Author's Name | Tetsuya KIMURA |
| 2nd Author's Affiliation | Graduate School of Adcanced Technology, Kinki University |
| 3rd Author's Name | Fuminari NAKAGAWA |
| 3rd Author's Affiliation | Graduate School of Adcanced Technology, Kinki University |
| 4th Author's Name | Hiroshi SHIRATUCHI |
| 4th Author's Affiliation | Graduate School of Adcanced Technology, Kinki University |
| 5th Author's Name | Naomi HARATANI |
| 5th Author's Affiliation | Graduate School of Adcanced Technology, Kinki University |
| 6th Author's Name | Hiromu GOTANDA |
| 6th Author's Affiliation | Graduate School of Adcanced Technology, Kinki University |
| Date | 2008-03-07 |
| Paper # | CAS2007-129,SIP2007-204,CS2007-94 |
| Volume (vol) | vol.107 |
| Number (no) | 529 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |