| Presentation | 2010-07-29 System identification with cyclostationary properties in spectrum sharing system Kenta UMEBAYASHI, Shinya HATAKEYAMA, Yukihiro KAMIYA, Yasuo SUZUKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In spectrum sensing, it is determined if a primary user(PU)is present in the studied frequency band(hypothesis H_1). If the PU is determined not to be present(hypothesis H_0), the frequency band could be used by secondary(unlicensed)users(SUs)for opportunistic access without harmful interference to PUs. In this paper, we apply cyclostationary based signal detection for identifying also two additional situations, H_2: another SU is already present in the studied band, and H_3: another SU and the PU are both present. In our method, if H_2 is decided to be true, fairness among SUs is increased by allowing the newly arrived SU to share the band with those SUs already using it. In the case of our proposed novel hypothesis H_3, we signal the SU using the band that it might be interfering with the PU and so it needs to vacate the frequency band immediately. This leads to increased protection of the PU. However, in the case where signal specifications such as carrier frequencies of SUs and the PU are the same or close, there may be false detection under H_1 and H_2 because of interference between SU and PU cyclic autocorrelation functions(CAFs). To solve this problem, we present a condition that the frequency offset between SU's carrier frequency and PU's carrier frequency needs to satisfy so that the CAFs of SUs and the PU cause a minimal interference to each other. Analysis of signal detection performance under H_3 where negligible correlation factor exists is introduced. In addition, the numerical results show that even with a small frequency offset it is possible to reliably distinguish between the hypotheses. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cognitive radio / cyclostationarity / System identification / Multiple hypothesis |
| Paper # | SR2010-17 |
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| Conference Information | |
| Committee | SR |
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| Conference Date | 2010/7/22(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Software Radio(SR) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | System identification with cyclostationary properties in spectrum sharing system |
| Sub Title (in English) | |
| Keyword(1) | Cognitive radio |
| Keyword(2) | cyclostationarity |
| Keyword(3) | System identification |
| Keyword(4) | Multiple hypothesis |
| 1st Author's Name | Kenta UMEBAYASHI |
| 1st Author's Affiliation | Tokyo University of Agriculture and Technology() |
| 2nd Author's Name | Shinya HATAKEYAMA |
| 2nd Author's Affiliation | The university of Electro-communications |
| 3rd Author's Name | Yukihiro KAMIYA |
| 3rd Author's Affiliation | Tokyo University of Agriculture and Technology |
| 4th Author's Name | Yasuo SUZUKI |
| 4th Author's Affiliation | Tokyo University of Agriculture and Technology |
| Date | 2010-07-29 |
| Paper # | SR2010-17 |
| Volume (vol) | vol.110 |
| Number (no) | 153 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |