{"created":"2023-07-27T07:50:59.580243+00:00","id":26241,"links":{},"metadata":{"_buckets":{"deposit":"6cd8b9bd-73da-4f00-9f05-df2a946e770a"},"_deposit":{"created_by":20,"id":"26241","owners":[20],"pid":{"revision_id":0,"type":"depid","value":"26241"},"status":"published"},"_oai":{"id":"oai:doshisha.repo.nii.ac.jp:00026241","sets":["4251:8138:8139:8140:8148","8:3372:3847:3855"]},"author_link":["24255","15455","15457"],"item_1693811493084":{"attribute_name":"出版タイプ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_1694490770713":{"attribute_name":"権利者情報","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"DA18202107","nameIdentifierScheme":"AID"}],"rightHolderNames":[{"rightHolderLanguage":"ja","rightHolderName":"同志社大学ハリス理化学研究所"},{"rightHolderLanguage":"en","rightHolderName":"Harris Science Research Institute of Doshisha University"}]}]},"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2018-07-31","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"89","bibliographicPageStart":"81","bibliographicVolumeNumber":"59","bibliographic_titles":[{"bibliographic_title":"同志社大学ハリス理化学研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"The Harris science review of Doshisha University","bibliographic_titleLang":"en"}]}]},"item_1_description_12":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"移動通信システムでは，伝搬路内の直接波に加えて反射波も端末に到来し，マルチパスフェージング環境が形成される．マルチパス環境では，異なる伝搬路の経路長差によってマルチパス遅延が生じる．この遅延は，伝搬路の周波数特性に変動を生じさせる．周波数領域において伝搬特性は複雑に変化するため，測定周波数とは異なる周波数の伝搬特性を推定することは一般に困難である．一方，CS（Compressed Sensing）は，疎な未知ベクトルの推定手法の1つである．伝搬路の遅延特性であるインパルス応答は，遅延波が存在する遅延時間のみに値を有するスパースな特性である．本研究では，CSを用いてスパースなインパルス応答を推定する方法を検討し，その推定性能を評価する．インパルス応答を推定する方法として，離散フーリエ変換と自己相関法が報告されている．CSを用いれば，他の方法よりも精度が高い推定が実現できる．高い推定性能を利用して，異なる周波数のチャネル係数を推定することも可能である．本研究では，CSを用いたインパルス応答推定の応用として，与えられた伝達関数の周波数帯域外のチャネル係数を推定する．さらに，FDD（Frequency Division Duplex）システムにおける送信ダイバーシチのフェージング抑圧効果を用いて，推定性能を定量的に評価する．","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"In mobile communication systems, reflected waves arrive at terminals in addition to the direct wave in propagation path, which create the multipath fading environments. In the multipath environment, the multipath delay occurs due to the difference of the path length of different propagation paths. These delays create variation of the frequency characteristics of the propagation characteristics. Since the propagation characteristics change complicatedly in the frequency domain, it is generally difficult to estimate channel state at different frequencies from measured frequency. On the other hand, Compressed Sensing (CS) is one of estimation techniques for sparse unknown vectors. The impulse response, which is the delay characteristic of the propagation path, has sparsity with a value only in the delay time when delay waves exist. In this study, we consider a method of estimating sparse impulse response by CS and analyze the estimation performance. As the methods of estimating impulse response Discrete Fourier Transform (DFT) and autocorrelation method have been reported. Using CS, estimation with very higher precision than the other methods can be realized. Taking the advantage of the high estimation performance, it is also possible to estimate channel states of the different frequencies. In this study, as an application of impulse response estimation using CS, channel states outside the frequency band of the given transfer function are estimated. The estimation performance is quantitatively evaluated with the fading reduction effect of transmit diversity in a Frequency Division Duplex (FDD) system.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_1_description_25":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.14988/pa.2018.0000000160","subitem_identifier_reg_type":"JaLC"}]},"item_1_publisher_15":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"同志社大学ハリス理化学研究所","subitem_publisher_language":"ja"}]},"item_1_publisher_16":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Harris Science Research Institute of Doshisha University","subitem_publisher_language":"en"}]},"item_1_relation_24":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"ja","subitem_relation_name_text":"掲載刊行物所蔵情報へのリンク ／ Link to Contents"}],"subitem_relation_type":"isFormatOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://doors.doshisha.ac.jp/opac/opac_link/bibid/SB12902196/?lang=0","subitem_relation_type_select":"URI"}}]},"item_1_source_id_17":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"21895937","subitem_source_identifier_type":"PISSN"}]},"item_1_source_id_19":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA12716107","subitem_source_identifier_type":"NCID"}]},"item_1_subject_27":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"547.5","subitem_subject_scheme":"NDC"}]},"item_1_text_8":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"中井, 悠真 / Faculty of Science and Engineering, Department of Electronics, Doshisha University"},{"subitem_text_language":"ja","subitem_text_value":"岩井, 誠人 / 同志社大学理工学部電子工学科教授"},{"subitem_text_language":"ja","subitem_text_value":"笹岡, 秀一 / 同志社大学理工学部電子工学科教授"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"中井, 悠真","creatorNameLang":"ja"},{"creatorName":"Nakai, Yuma","creatorNameLang":"en"}],"nameIdentifiers":[{},{}]},{"creatorNames":[{"creatorName":"岩井, 誠人","creatorNameLang":"ja"},{"creatorName":"イワイ, ヒサト","creatorNameLang":"ja-Kana"},{"creatorName":"Iwai, Hisato","creatorNameLang":"en"}],"nameIdentifiers":[{},{},{},{}]},{"creatorNames":[{"creatorName":"笹岡, 秀一","creatorNameLang":"ja"},{"creatorName":"ササオカ, ヒデイチ","creatorNameLang":"ja-Kana"},{"creatorName":"Sasaoka, Hideichi","creatorNameLang":"en"}],"nameIdentifiers":[{},{},{},{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-08-21"}],"displaytype":"detail","filename":"023059020004.pdf","filesize":[{"value":"1.7 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"023059020004.pdf","url":"https://doshisha.repo.nii.ac.jp/record/26241/files/023059020004.pdf"},"version_id":"605099c0-6797-41c1-8a31-045403d856e1"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"圧縮センシング","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"インパルス応答","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"周波数分割複信方式","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"送信ダイバーシチ","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"compressed sensing","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"impulse response","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"frequency division duplex system","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"transmit diversity","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"圧縮センシングを用いたインパルス応答推定に基づく異なる無線周波数におけるチャネル特性の推定","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"圧縮センシングを用いたインパルス応答推定に基づく異なる無線周波数におけるチャネル特性の推定","subitem_title_language":"ja"},{"subitem_title":"アッシュク センシング オ モチイタ インパルス オウトウ スイテイ ニ モトズク コトナル ムセン シュウハスウ ニオケル チャネル トクセイ ノ スイテイ","subitem_title_language":"ja-Kana"},{"subitem_title":"Estimation of channel state at a different radio frequency based on impulse response estimation by compressed sensing","subitem_title_language":"en"}]},"item_type_id":"1","owner":"20","path":["3855","8148"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2018-08-22"},"publish_date":"2018-08-22","publish_status":"0","recid":"26241","relation_version_is_last":true,"title":["圧縮センシングを用いたインパルス応答推定に基づく異なる無線周波数におけるチャネル特性の推定"],"weko_creator_id":"20","weko_shared_id":-1},"updated":"2023-11-30T01:30:26.957470+00:00"}