| Presentation | 2007-11-01 A novel FFT-based Variable Channel and Bandwidth-TDMA scheme (VCB-TDMA) for Dynamic Spectrum Access Wireless Networks(Modem Technology) Masahiro UMEHIRA, Koichi ISHIHARA, Yasushi TAKATORI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Dynamic Spectrum Access has been drawing a significant deal of attention to improve frequency utilization efficiency since it enables to use the temporarily vacant frequency spectrum in terms of frequency domain and time domain. This report proposes a new multiple access technique for Dynamic Spectrum Access, named FFT-based VCB-TDMA (Variable Channel and Bandwidth TDMA), which is expected to be used for future mobile satellite communications as well. This report describes the principle of the proposed FFT-based VCB-TDMA and points out that the inter-channel interference is resulted from not only the filter characteristics but also the discontinuity of adjacent channel signals for FFT processing. In addition, this report proposes the inter-channel interference reduction technique using guard time. The inter-channel interference reduction is confirmed by the computer simulation in AWGN environments. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Dynamic Spectrum Access / DFT / VCS-TDMA / Inter-channel interference |
| Paper # | SAT2007-31 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2007/10/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | 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) | A novel FFT-based Variable Channel and Bandwidth-TDMA scheme (VCB-TDMA) for Dynamic Spectrum Access Wireless Networks(Modem Technology) |
| Sub Title (in English) | |
| Keyword(1) | Dynamic Spectrum Access |
| Keyword(2) | DFT |
| Keyword(3) | VCS-TDMA |
| Keyword(4) | Inter-channel interference |
| 1st Author's Name | Masahiro UMEHIRA |
| 1st Author's Affiliation | College of Engineering, Ibaraki University() |
| 2nd Author's Name | Koichi ISHIHARA |
| 2nd Author's Affiliation | NTT Network Innovation Laboratories |
| 3rd Author's Name | Yasushi TAKATORI |
| 3rd Author's Affiliation | NTT Network Innovation Laboratories |
| Date | 2007-11-01 |
| Paper # | SAT2007-31 |
| Volume (vol) | vol.107 |
| Number (no) | 299 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |