| Presentation | 2016-03-23 Adaptive Filtering for Frequency Fluctuating Periodic Interference Yusuke Matsubara, Naohiro Toda, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Periodic interference frequently disturbs the measurement of small signals and causes problems. Adaptive filters are potential methods to cancel such interference. However, when the interference has a fluctuating frequency, the ideal FIR adaptive filter coefficients to cancel the interference also fluctuate. When the algorithm's adaptation property is slow in comparison with the frequency fluctuation, the interference cancelling performance degrades. On the other hand, if the adaptation is made too quick, the influence of target signal itself makes performance lower. To overcome this problem we propose an adaptive filter that suppresses fluctuation of ideal coefficients by utilizing $frac{pi}{2}$ phase delay device. This method assumes the frequency response that characterizes the route from the interference source to main input signal to be sufficiently smooth. In numerical examples the proposed method shows good performance in the presence of frequency fluctuation by setting forgetting factor large. Moreover, we show that proposed method has another virtue in calculation cost. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | periodic interference / adaptive filter / RLS algorithm / frequency fluctuating / higher harmonic |
| Paper # | MBE2015-129 |
| Date of Issue | 2016-03-15 (MBE) |
| Conference Information | |
| Committee | MBE / NC |
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| Conference Date | 2016/3/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tamagawa University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsuo Kobayashi(Kyoto Univ.) / Toshimichi Saito(Hosei Univ.) |
| Vice Chair | Yutaka Fukuoka(Kogakuin Univ.) / Shigeo Sato(Tohoku Univ.) |
| Secretary | Yutaka Fukuoka(akita noken) / Shigeo Sato(Kogakuin Univ.) |
| Assistant | Takenori Oida(Kyoto Univ.) / Ryota Horie(Shibaura Inst. of Tech.) / Hiroyuki Kanbara(Tokyo Inst. of Tech.) / Hisanao Akima(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on ME and Bio Cybernetics / Technical Committee on Neurocomputing |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Adaptive Filtering for Frequency Fluctuating Periodic Interference |
| Sub Title (in English) | |
| Keyword(1) | periodic interference |
| Keyword(2) | adaptive filter |
| Keyword(3) | RLS algorithm |
| Keyword(4) | frequency fluctuating |
| Keyword(5) | higher harmonic |
| 1st Author's Name | Yusuke Matsubara |
| 1st Author's Affiliation | Aichi Prefectural University(Aichi Prefectural Univ.) |
| 2nd Author's Name | Naohiro Toda |
| 2nd Author's Affiliation | Aichi Prefectural University(Aichi Prefectural Univ.) |
| Date | 2016-03-23 |
| Paper # | MBE2015-129 |
| Volume (vol) | vol.115 |
| Number (no) | MBE-513 |
| Page | pp.pp.149-154(MBE), |
| #Pages | 6 |
| Date of Issue | 2016-03-15 (MBE) |