{"created":"2021-03-01T06:05:28.010343+00:00","id":1786,"links":{},"metadata":{"_buckets":{"deposit":"5f2f8f53-72a4-478b-9a04-f4a887cc0447"},"_deposit":{"id":"1786","owners":[],"pid":{"revision_id":0,"type":"depid","value":"1786"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00001786","sets":["423:424:425","453:454"]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2010-02","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"352","bibliographicPageStart":"345","bibliographicVolumeNumber":"E93-B","bibliographic_titles":[{"bibliographic_title":"IEICE transactions on communications"},{"bibliographic_title":"IEICE transactions on communications","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Multi-user multiple input multiple output (MU-MIMO) systems have attracted much attention as a technology that enhances the total system capacity by generating a virtual MIMO channel between a base station and multiple terminal stations. Extensive evaluations are still needed because there are many more system parameters in MU-MIMO than in single user (SU)-MIMO and the MU-MIMO performance in actual environments is still not well understood. This paper describes the features and effectiveness of a 1616 MU-MIMO testbed in an actual indoor environment. Moreover, we propose a simple adaptive modulation scheme for MU-MIMO-OFDM transmission that employs a bit interleaver in the frequency and space domains. We evaluate the frequency efficiency by obtaining the bit error rate of this testbed in an actual indoor environment. We show that 1644-user MU-MIMO transmission using the proposed modulation scheme achieves the frequency utilization of 870 Mbps and 1 Gbps (respective SNRs: 31 and 36 dB) with a 20-MHz bandwidth.","subitem_description_type":"Abstract"}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"The Institute of Electronics, Information and Communication Engineers"}]},"item_5_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.1587/transcom.E93.B.345","subitem_relation_type_select":"DOI"}}]},"item_5_relation_31":{"attribute_name":"異版である","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://www.ieice.org/jpn/trans_online/","subitem_relation_type_select":"URI"}}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright(C)2010 IEICE"},{"subitem_rights":"本文データは学協会の許諾に基づきEJサイトから複製したものである"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA10826261","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"09168516","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Nishimori, Kentaro"}],"nameIdentifiers":[{"nameIdentifier":"5580","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kudo, Riichi"}],"nameIdentifiers":[{"nameIdentifier":"5581","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Honma, Naoki"}],"nameIdentifiers":[{"nameIdentifier":"5582","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takatori, Yasushi"}],"nameIdentifiers":[{"nameIdentifier":"5583","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Mizoguchi, Masato"}],"nameIdentifiers":[{"nameIdentifier":"5584","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-07-29"}],"displaytype":"detail","filename":"E93-B_2_345-352.pdf","filesize":[{"value":"702.6 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"E93-B_2_345-352.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/1786/files/E93-B_2_345-352.pdf"},"version_id":"0d2d6b4b-50a7-444a-8a05-7a85f1ac9528"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"multiuser MIMO","subitem_subject_scheme":"Other"},{"subitem_subject":"adaptive modulation scheme","subitem_subject_scheme":"Other"},{"subitem_subject":"OFDM","subitem_subject_scheme":"Other"},{"subitem_subject":"eigenvalue","subitem_subject_scheme":"Other"},{"subitem_subject":"bit interleaver","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"16x16 MIMO testbed for MU-MIMO downlink transmission","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"16x16 MIMO testbed for MU-MIMO downlink transmission"},{"subitem_title":"16x16 MIMO testbed for MU-MIMO downlink transmission","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","425"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-12-02"},"publish_date":"2014-12-02","publish_status":"0","recid":"1786","relation_version_is_last":true,"title":["16x16 MIMO testbed for MU-MIMO downlink transmission"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:34:34.811998+00:00"}