{"_buckets": {"deposit": "28a395b7-558e-4102-ae54-04c0e42b4e46"}, "_deposit": {"id": "8625", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "8625"}, "status": "published"}, "_oai": {"id": "oai:kitami-it.repo.nii.ac.jp:00008625"}, "item_5_biblio_info_6": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2014-12-18", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "86", "bibliographicPageEnd": "114", "bibliographicPageStart": "109", "bibliographicVolumeNumber": "SIS2014", "bibliographic_titles": [{"bibliographic_title": "\u96fb\u5b50\u60c5\u5831\u901a\u4fe1\u5b66\u4f1a\u6280\u8853\u7814\u7a76\u5831\u544a\uff0eSIS"}]}]}, "item_5_description_4": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "\u6c34\u4e2d\u97f3\u97ff\u901a\u4fe1\u306f\u7121\u7dda\u3067\u306e\u753b\u50cf\u3084\u52d5\u753b\u4f1d\u9001,\u9060\u9694\u64cd\u4f5c\u7121\u4eba\u63a2\u67fb\u6a5f(Remotely Operated Vehicle, ROV)\u306e\u9060\u9694\u64cd\u4f5c\u306a\u3069\u69d8\u3005\u306a\u7528\u9014\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u308b.OFDM\u306f\u30de\u30eb\u30c1\u30d1\u30b9\u5e72\u6e09\u306b\u5f37\u3044\u304c,\u30de\u30eb\u30c1\u30d1\u30b9\u306e\u6700\u5927\u9045\u5ef6\u6642\u9593\u306b\u5fdc\u3058\u3066\u30ac\u30fc\u30c9\u30a4\u30f3\u30bf\u30fc\u30d0\u30eb\u9577\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u3067\u6c34\u4e2d\u97f3\u97ff\u901a\u4fe1\u3067\u306f\u9577\u9045\u5ef6\u306e\u30de\u30eb\u30c1\u30d1\u30b9\u306b\u3088\u308a\u5b9f\u52b9\u30c7\u30fc\u30bf\u4f1d\u9001\u901f\u5ea6\u306e\u4f4e\u4e0b\u3084\u53d7\u4fe1\u5fdc\u7b54\u306e\u9045\u5ef6\u304c\u554f\u984c\u3068\u306a\u308b.\u672c\u7814\u7a76\u3067\u306f\u6c34\u4e2d\u97f3\u97ff\u901a\u4fe1\u3067\u77ed\u3044\u30ac\u30fc\u30c9\u30a4\u30f3\u30bf\u30fc\u30d0\u30eb\u3067\u3082\u5341\u5206\u306a\u901a\u4fe1\u54c1\u8cea\u3092\u5f97\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3068\u3057\u3066\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u3092\u691c\u8a3c\u3059\u308b.\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u306e\u4fe1\u53f7\u5408\u6210\u6cd5\u3068\u3057\u3066\u6700\u5927\u6bd4\u5408\u6210\u3084\u9078\u629e\u5408\u6210\u304c\u3042\u308a,\u4fe1\u53f7\u5bfe\u96d1\u97f3\u96fb\u529b\u6bd4\u3092\u6539\u5584\u3059\u308b\u89b3\u70b9\u3067\u306f\u6700\u5927\u6bd4\u5408\u6210\u306e\u307b\u3046\u304c\u52b9\u679c\u304c\u9ad8\u3044\u3053\u3068\u304c\u77e5\u3089\u308c\u3066\u3044\u308b.\u3057\u304b\u3057\u306a\u304c\u3089,\u30ac\u30fc\u30c9\u30a4\u30f3\u30bf\u30fc\u30d0\u30eb\u3092\u8d85\u3048\u308b\u9045\u5ef6\u6ce2\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306f,\u9078\u629e\u5408\u6210\u304c\u6700\u5927\u6bd4\u5408\u6210\u3088\u308a\u3082\u6539\u5584\u52b9\u679c\u304c\u9ad8\u3044\u5834\u5408\u304c\u3042\u308b\u3053\u3068\u304c\u691c\u8a3c\u306b\u3088\u308a\u660e\u3089\u304b\u3068\u306a\u3063\u305f.\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u5927\u304d\u306a\u901a\u4fe1\u7279\u6027\u306e\u6539\u5584\u304c\u3042\u308a,\u5468\u6ce2\u6570,\u7a7a\u9593,\u6642\u9593\u306e3\u3064\u306e\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u3092\u7d44\u307f\u308f\u305b\u305f\u6642,CN\u6bd4\u306720dB\u306e\u901a\u4fe1\u7279\u6027\u306e\u6539\u5584\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u305f.", "subitem_description_type": "Abstract"}]}, "item_5_description_5": {"attribute_name": "\u5185\u5bb9\u8a18\u8ff0", "attribute_value_mlt": [{"subitem_description": "Underwater acoustic communication has been widely used in remotely operated vehicle (ROV) and wireless video and image transmission systems. Orthogonal frequency division multiplexing (OFDM) is effective to cope with multipath interference. However, acoustic underwater communication requires a very long guard interval, so which decreases an effective transmission speed and delays a received response. Since OFDM sets a guard interval (GI) in accordance with maximum delay time in multipath, we study various diversity techniques to obtain sufficient communication quality even for a short GI for underwater communications. It is well known that Maximum ratio combining (MRC) is superior to selective combining (SC) in terms of improvement of signal-to-noise ratio (SNR). However, we have found that SC provides better communication performance than MRC on the conditions that a multipath delay exceeds GI and OFDM symbol duration. Moreoever combining diversity techniques in frequency-, space-, and time-domain, shows communication performance improvement of 20-dB in CNR.", "subitem_description_type": "Other"}]}, "item_5_publisher_32": {"attribute_name": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u4e00\u822c\u793e\u56e3\u6cd5\u4eba\u96fb\u5b50\u60c5\u5831\u901a\u4fe1\u5b66\u4f1a"}]}, "item_5_rights_12": {"attribute_name": "\u6a29\u5229", "attribute_value_mlt": [{"subitem_rights": "\u00a92014 by IEICE"}]}, "item_5_select_15": {"attribute_name": "\u8457\u8005\u7248\u30d5\u30e9\u30b0", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_5_source_id_7": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0913-5685", "subitem_source_identifier_type": "ISSN"}]}, "item_creator": {"attribute_name": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "\u77f3\u672c, \u9686\u592a"}], "nameIdentifiers": [{"nameIdentifier": "89928", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u8d64\u7530, \u77ac"}], "nameIdentifiers": [{"nameIdentifier": "89929", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u5409\u6fa4 , \u771f\u543e"}], "nameIdentifiers": [{"nameIdentifier": "298", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "20447080", "nameIdentifierScheme": "KAKEN - \u7814\u7a76\u8005\u691c\u7d22", "nameIdentifierURI": "https://nrid.nii.ac.jp/ja/nrid/1000020447080/"}]}, {"creatorNames": [{"creatorName": "\u8c37\u672c, \u6d0b"}], "nameIdentifiers": [{"nameIdentifier": "220", "nameIdentifierScheme": "WEKO"}, {"nameIdentifier": "20322886", "nameIdentifierScheme": "KAKEN - \u7814\u7a76\u8005\u691c\u7d22", "nameIdentifierURI": "https://nrid.nii.ac.jp/ja/nrid/1000020322886/"}]}, {"creatorNames": [{"creatorName": "\u9f4a\u85e4, \u9686"}], "nameIdentifiers": [{"nameIdentifier": "89930", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "ISHIMOTO, Ryuta", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "89931", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "AKADA, Syun", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "89932", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "YOSHIZAWA, Shingo", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "89933", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "TANIMOTO, Hiroshi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "89934", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "SAITO, Takashi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "89935", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_date", "date": [{"dateType": "Available", "dateValue": "2018-02-16"}], "displaytype": "detail", "download_preview_message": "", "file_order": 0, "filename": "SIS2014-86.pdf", "filesize": [{"value": "1.7 MB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 1700000.0, "url": {"label": "SIS2014-86", "url": "https://kitami-it.repo.nii.ac.jp/record/8625/files/SIS2014-86.pdf"}, "version_id": "387aa8b5-7475-47c5-aa97-4ab547c29329"}]}, "item_keyword": {"attribute_name": "\u30ad\u30fc\u30ef\u30fc\u30c9", "attribute_value_mlt": [{"subitem_subject": "\u6c34\u4e2d\u97f3\u97ff\u901a\u4fe1", "subitem_subject_scheme": "Other"}, {"subitem_subject": "OFDM", "subitem_subject_scheme": "Other"}, {"subitem_subject": "\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Underwater acoustic communication", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "OFDM", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}, {"subitem_subject": "Diversity techniques", "subitem_subject_language": "en", "subitem_subject_scheme": "Other"}]}, "item_language": {"attribute_name": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "conference paper", "resourceuri": "http://purl.org/coar/resource_type/c_5794"}]}, "item_title": "\u6c34\u4e2d\u97f3\u97ffOFDM\u901a\u4fe1\u306b\u304a\u3051\u308b\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u306e\u7d44\u307f\u5408\u308f\u305b\u8a55\u4fa1 (\u30b9\u30de\u30fc\u30c8\u30a4\u30f3\u30d5\u30a9\u30e1\u30c7\u30a3\u30a2\u30b7\u30b9\u30c6\u30e0)", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "\u6c34\u4e2d\u97f3\u97ffOFDM\u901a\u4fe1\u306b\u304a\u3051\u308b\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u306e\u7d44\u307f\u5408\u308f\u305b\u8a55\u4fa1 (\u30b9\u30de\u30fc\u30c8\u30a4\u30f3\u30d5\u30a9\u30e1\u30c7\u30a3\u30a2\u30b7\u30b9\u30c6\u30e0)"}, {"subitem_title": "Evaluation of Diversity Combining Methods for Underwater Acoustic OFDM Communication", "subitem_title_language": "en"}]}, "item_type_id": "5", "owner": "1", "path": ["10"], "permalink_uri": "https://kitami-it.repo.nii.ac.jp/records/8625", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "attribute_value": "2018-02-16"}, "publish_date": "2018-02-16", "publish_status": "0", "recid": "8625", "relation": {}, "relation_version_is_last": true, "title": ["\u6c34\u4e2d\u97f3\u97ffOFDM\u901a\u4fe1\u306b\u304a\u3051\u308b\u30c0\u30a4\u30d0\u30fc\u30b7\u30c1\u6280\u8853\u306e\u7d44\u307f\u5408\u308f\u305b\u8a55\u4fa1 (\u30b9\u30de\u30fc\u30c8\u30a4\u30f3\u30d5\u30a9\u30e1\u30c7\u30a3\u30a2\u30b7\u30b9\u30c6\u30e0)"], "weko_shared_id": null}