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ウィンドウニング法による帯域外電力抑圧を行うNC-OFDM伝送特性の改善
https://doi.org/10.14988/pa.2017.0000013588
https://doi.org/10.14988/pa.2017.0000013588ae0d354f-8dcf-4757-85ab-348756714ce3
名前 / ファイル | ライセンス | アクション |
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023055020001.pdf (4.3 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||||||
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公開日 | 2014-09-01 | |||||||||||||||||
タイトル | ||||||||||||||||||
言語 | ja | |||||||||||||||||
タイトル | ウィンドウニング法による帯域外電力抑圧を行うNC-OFDM伝送特性の改善 | |||||||||||||||||
タイトル | ||||||||||||||||||
言語 | ja-Kana | |||||||||||||||||
タイトル | ウィンドウニングホウ ニヨル タイイキガイ デンリョク ヨクアツ オ オコナウ NC-OFDM デンソウ トクセイ ノ カイゼン | |||||||||||||||||
タイトル | ||||||||||||||||||
言語 | en | |||||||||||||||||
タイトル | Study on improvement of NC-OFDM transmission performance with reduction of out-of-band emission by a windowing method | |||||||||||||||||
言語 | ||||||||||||||||||
言語 | jpn | |||||||||||||||||
キーワード | ||||||||||||||||||
主題 | コグニティブ無線, 準最尤推定法 NC-OFDM, windowing, cognitive radio, QMLE |
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資源タイプ | ||||||||||||||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||
資源タイプ | departmental bulletin paper | |||||||||||||||||
ID登録 | ||||||||||||||||||
ID登録 | 10.14988/pa.2017.0000013588 | |||||||||||||||||
ID登録タイプ | JaLC | |||||||||||||||||
アクセス権 | ||||||||||||||||||
アクセス権 | open access | |||||||||||||||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||||||
著者 |
實升, 大輔
× 實升, 大輔× 岩井, 誠人
WEKO
15455
× 笹岡, 秀一
WEKO
15457
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著者所属 | ||||||||||||||||||
ja | ||||||||||||||||||
實升, 大輔 / 同志社大学理工学部電子工学科 | ||||||||||||||||||
著者所属 | ||||||||||||||||||
ja | ||||||||||||||||||
岩井, 誠人 / 同志社大学理工学部電子工学科教授 | ||||||||||||||||||
著者所属 | ||||||||||||||||||
ja | ||||||||||||||||||
笹岡, 秀一 / 同志社大学理工学部電子工学科教授 | ||||||||||||||||||
抄録 | ||||||||||||||||||
内容記述タイプ | Abstract | |||||||||||||||||
内容記述 | 高速な無線データ伝送を実現する有望で実用的なNC-OFDM方式を提示する。それはコグニティブ無線網で断片的な空き周波数帯域をSUによって行う効率的な通信に適切である。NC-OFDM方式は効率的な通信が可能であるが、PUとSUの間にユーザ間干渉問題は存在する。NC-OFDM伝送を使用することで発生する帯域外輻射の低減法はこれまで研究されてきた。帯域外電力低減を実現するためのNC-OFDMで使用可能な実用的なアプローチ、Windowing法を提示する。しかし、Windowing法によってBER特性が劣化する欠点を持っているBER特性改善のためにMLEを簡略化したQMLEを提示する。これは、Windowing法に起因する歪みによる特性劣化を補償する。MLEは演算コストが重く、実用的ではないがQMLEは演算コストを効果的に減らすことが可能である。QMLEによるBER特性改善について計算機シミュレーションで定量的に評価する。 | |||||||||||||||||
言語 | ja | |||||||||||||||||
抄録 | ||||||||||||||||||
内容記述タイプ | Abstract | |||||||||||||||||
内容記述 | We present non-contiguous orthogonal frequency division multiplexing (NC-OFDM) scheme as a promising and practical method for achieving spectrally agile wireless data transmission. It is suitable for efficient access to fragmented vacant frequency bands by secondary users (SUs) in a cognitive radio network. Although the NC-OFDM scheme allows efficient communication, there is an inter-user interference problem between primary users (PUs) and SUs. The methods focusing on the reduction of out-of-band (OOB) emissions generated by the use of NC-OFDM transmission have been studied. With the purpose to achieve the required OOB suppression we present practical approach that can be employed in NC-OFDM, namely, Windowing. However, it has a defect that the BER (Bit Error Rate) performance is degraded by the Windowing method. In order to improve the BER performance we present quasi maximum likelihood estimator (QMLE), which is a simplified MLE method. It compensates for the performance degradation due to the distortion by Windowing. While MLE requires heavy computational cost and is unrealistic, QMLE can effectively reduce the computational cost. We evaluate BER performance improvement of the QMLE method by computer simulations quantitatively. | |||||||||||||||||
言語 | en | |||||||||||||||||
書誌情報 |
ja : 同志社大学理工学研究報告 en : The Science and Engineering Review of Doshisha University 巻 55, 号 2, p. 93-100, 発行日 2014-07-31 |
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出版者 | ||||||||||||||||||
言語 | ja | |||||||||||||||||
出版者 | 同志社大学理工学研究所 | |||||||||||||||||
出版者(英) | ||||||||||||||||||
言語 | en | |||||||||||||||||
出版者 | Science and Engineering Research Institute of Doshisha University | |||||||||||||||||
ISSN | ||||||||||||||||||
収録物識別子タイプ | PISSN | |||||||||||||||||
収録物識別子 | 00368172 | |||||||||||||||||
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収録物識別子タイプ | NCID | |||||||||||||||||
収録物識別子 | AN00165868 | |||||||||||||||||
権利者情報 | ||||||||||||||||||
権利者名 | 同志社大学理工学研究所 | |||||||||||||||||
言語 | ja | |||||||||||||||||
権利者名 | Science and Engineering Research Institute of Doshisha University | |||||||||||||||||
言語 | en | |||||||||||||||||
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関連タイプ | isFormatOf | |||||||||||||||||
識別子タイプ | URI | |||||||||||||||||
関連識別子 | https://doors.doshisha.ac.jp/opac/opac_link/bibid/SB00960326/?lang=0 | |||||||||||||||||
言語 | ja | |||||||||||||||||
関連名称 | 掲載刊行物所蔵情報へのリンク / Link to Contents | |||||||||||||||||
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内容記述タイプ | Other | |||||||||||||||||
内容記述 | application/pdf | |||||||||||||||||
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出版タイプ | VoR | |||||||||||||||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||
日本十進分類法 | ||||||||||||||||||
主題 | 547.5 |