| Presentation | 2021-11-05 Initialization of forward method in CFAR outlier detection Yau Hong Leow, Kenta Umebayashi, Janne Lehtomaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To solve the spectrum scarcity problem, energy detection (ED) is an effective technique to find the vacant spectrum for spectrum sharing. The performance of ED greatly depends on the threshold setting. In general, the threshold can be set using the noise floor information in the wireless receiver. Since the noise floor is usually unknown a priori, a forward method noise floor estimation algorithm known as Forward Consecutive Mean Excision (FCME) algorithm is considered to estimate the noise floor. FCME algorithm estimates the noise floor by collecting noise samples starting from an initial noise samples set Q. In the literature, proper setting of Q was not discussed and Q was assumed to be 10% of total samples expecting that the total signal occupancy rate to be 90% of total samples. However, it was found that setting 10% of total samples for Q when parameters of ED are varied can lead to the situations that FCME could not update the noise samples set after first few iterations or signal samples could be present in the assumed noise samples set, in which case the noise floor estimation performance suffers. In this paper, appropriate size of Q is discussed when parameters including total number of samples, desired probability of false alarm, channel occupancy rate and signal-to-noise ratio (SNR) are varied. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Spectrum Sensing / Energy Detection / Constant False Alarm Rate (CFAR) / Detection Threshold |
| Paper # | SR2021-57 |
| Date of Issue | 2021-10-28 (SR) |
| Conference Information | |
| Committee | SR |
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| Conference Date | 2021/11/4(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Software Defined Radio, Cognitive Radio, Spectrum Shareing, etc. |
| Chair | Suguru Kameda(Hiroshima Univ.) |
| Vice Chair | Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) |
| Secretary | Osamu Takyu(Mie Univ.) / Kentaro Ishidu(Tokai Univ.) / Kazuto Yano(NTT) |
| Assistant | Mai Ohta(Fukuoka Univ.) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) |
| Paper Information | |
| Registration To | Technical Committee on Smart Radio |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Initialization of forward method in CFAR outlier detection |
| Sub Title (in English) | |
| Keyword(1) | Spectrum Sensing |
| Keyword(2) | Energy Detection |
| Keyword(3) | Constant False Alarm Rate (CFAR) |
| Keyword(4) | Detection Threshold |
| 1st Author's Name | Yau Hong Leow |
| 1st Author's Affiliation | Tokyo University of Agriculture and Technology(TUAT) |
| 2nd Author's Name | Kenta Umebayashi |
| 2nd Author's Affiliation | Tokyo University of Agriculture and Technology(TUAT) |
| 3rd Author's Name | Janne Lehtomaki |
| 3rd Author's Affiliation | University of Oulu(UoO) |
| Date | 2021-11-05 |
| Paper # | SR2021-57 |
| Volume (vol) | vol.121 |
| Number (no) | SR-227 |
| Page | pp.pp.98-103(SR), |
| #Pages | 6 |
| Date of Issue | 2021-10-28 (SR) |