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| 講演名 | 2014-10-31 13:00 ［技術展示］Development of a measurement system for spectrum awareness -- Duty estimation based on Welch-FFT -- ○Hiroki Iwata・Kenta Umebayashi・Riki Mizuchi・Tatsuya Maruyama・Kazuki Moriwaki・Samuli Tiiro（TUAT）・Janne Lehtomaki（Univ. of Oulu）・Yasuo Suzuki（TUAT）  SR2014-89 |
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| 抄録 | （和） | To resolve the spectrum scarcity problem, dynamic spectrum access (DSA) has been investigated recently. In DSA, an unlicensed user (secondary user : SU) can opportunistically access the unused spectrum (White Space : WS) owned by the licensed user (primary user : PU) while mitigating harmful interference from SU to PU. Key technique in DSA is spectrum sensing which is used to detect WS. However, implementing spectrum sensing in practice with reasonably low cost is very challenging due to the required detection accuracy and quickness. One possible approach to achieve the requirements is to use statistics regarding PU spectrum utilization in spectrum sensing. For this issue, it is necessary to develop a system for obtaining the statistical information, such as Duty Cycle (DC). In our previous work, DC estimation based on Welch-FFT has been investigated. In the DC estimation method, there is a trade-off relationship between DC estimation accuracy and WS detection accuracy with regard to the segment size of Welch-FFT. In this paper, we de ne the evaluation criteria for DC estimation accuracy and WS detection accuracy and provide the segment size design guideline in terms of DSA. |
| （英） | To resolve the spectrum scarcity problem, dynamic spectrum access (DSA) has been investigated recently. In DSA, an unlicensed user (secondary user : SU) can opportunistically access the unused spectrum (White Space : WS) owned by the licensed user (primary user : PU) while mitigating harmful interference from SU to PU. Key technique in DSA is spectrum sensing which is used to detect WS. However, implementing spectrum sensing in practice with reasonably low cost is very challenging due to the required detection accuracy and quickness. One possible approach to achieve the requirements is to use statistics regarding PU spectrum utilization in spectrum sensing. For this issue, it is necessary to develop a system for obtaining the statistical information, such as Duty Cycle (DC). In our previous work, DC estimation based on Welch-FFT has been investigated. In the DC estimation method, there is a trade-off relationship between DC estimation accuracy and WS detection accuracy with regard to the segment size of Welch-FFT. In this paper, we de ne the evaluation criteria for DC estimation accuracy and WS detection accuracy and provide the segment size design guideline in terms of DSA. | |
| キーワード | （和） | Dynamic spectrum access / Spectrum measurement / Duty Cycle / Welch FFT / / / / |
| （英） | Dynamic spectrum access / Spectrum measurement / Duty Cycle / Welch FFT / / / / | |
| 文献情報 | 信学技報, vol. 114, no. 284, SR2014-89, pp. 171-177, 2014年10月. | |
| 資料番号 | SR2014-89 | |
| 発行日 | 2014-10-23 (SR) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| 著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します．(許諾番号：10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| PDFダウンロード | SR2014-89 |
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