{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T15:27:10Z","timestamp":1774366030427,"version":"3.50.1"},"reference-count":52,"publisher":"Institute of Electrical and Electronics Engineers (IEEE)","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"name":"Institute of Information and Communications Technology Planning and Evaluation (IITP)-Innovative Human Resource Development for Local Intellectualization Program Grant funded by the Korea Government","award":["IITP-2026-RS-2022-00156389"],"award-info":[{"award-number":["IITP-2026-RS-2022-00156389"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE J. Sel. Areas Commun."],"published-print":{"date-parts":[[2026]]},"DOI":"10.1109\/jsac.2025.3614195","type":"journal-article","created":{"date-parts":[[2025,9,25]],"date-time":"2025-09-25T17:55:29Z","timestamp":1758822929000},"page":"1259-1275","source":"Crossref","is-referenced-by-count":2,"title":["How Much Training Is Required for Channel Estimation in Fluid Antenna System?"],"prefix":"10.1109","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8181-5994","authenticated-orcid":false,"given":"Jae-Mo","family":"Kang","sequence":"first","affiliation":[{"name":"Department of Artificial Intelligence, Kyungpook National University, Daegu, South Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1339-8057","authenticated-orcid":false,"given":"Il-Min","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering, Queen’s University, Kingston, ON, Canada"}]}],"member":"263","reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1109\/COMST.2023.3249835"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1109\/MNET.001.1900287"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1016\/j.jksuci.2022.03.019"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.3389\/frcmn.2022.853416"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3284320"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3284318"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3284312"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1109\/mcom.001.2300212"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2023.3330887"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2023.3307696"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2024.3350647"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2025.3555290"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1109\/LWC.2024.3392924"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2020.3037595"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2023.3276245"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1109\/lcomm.2023.3348028"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2021.3133410"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2023.3255940"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2022.3222574"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2004.1367557"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2011.2165470"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2012.2207334"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2014.2314464"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2013.2293509"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1109\/TCOMM.2022.3230861"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1109\/ICC45041.2023.10278813"},{"key":"ref27","doi-asserted-by":"publisher","DOI":"10.1109\/twc.2024.3515135"},{"key":"ref28","doi-asserted-by":"publisher","DOI":"10.1109\/WCNC57260.2024.10571302"},{"key":"ref29","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3347951"},{"key":"ref30","doi-asserted-by":"publisher","DOI":"10.1109\/ICCCWorkshops57813.2023.10233765"},{"key":"ref31","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3310535"},{"key":"ref32","doi-asserted-by":"publisher","DOI":"10.1109\/twc.2024.3385110"},{"key":"ref33","doi-asserted-by":"publisher","DOI":"10.1109\/lwc.2024.3386153"},{"key":"ref34","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2022.3152451"},{"key":"ref35","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2023.3237595"},{"key":"ref36","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2005.863008"},{"key":"ref37","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2009.2037352"},{"key":"ref38","doi-asserted-by":"publisher","DOI":"10.1109\/TIT.2003.809594"},{"key":"ref39","doi-asserted-by":"publisher","DOI":"10.1109\/ACSSC.2006.354768"},{"key":"ref40","doi-asserted-by":"publisher","DOI":"10.1109\/TCOMM.2017.2679194"},{"key":"ref41","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2018.2819175"},{"key":"ref42","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2020.2991178"},{"key":"ref43","doi-asserted-by":"publisher","DOI":"10.1109\/jiot.2024.3363170"},{"key":"ref44","volume-title":"Principles of Mobile Communication","author":"St\u00fcber","year":"2002"},{"key":"ref45","doi-asserted-by":"publisher","DOI":"10.1109\/26.837052"},{"key":"ref46","volume-title":"Handbook of Matrices","author":"Lutkepohl","year":"1996"},{"key":"ref47","volume-title":"Fundamentals of Statistical Signal Processing: Estimation Theory","author":"Kay","year":"1993"},{"key":"ref48","doi-asserted-by":"publisher","DOI":"10.1017\/cbo9780511804441"},{"key":"ref49","article-title":"The matrix cookbook","author":"Petersen","year":"2007"},{"key":"ref50","volume-title":"Inequalities: Theory of Majorization and Its Applications","author":"Marshall","year":"1979"},{"key":"ref51","doi-asserted-by":"publisher","DOI":"10.1137\/1.9781611970791"},{"key":"ref52","article-title":"Floating point operations matrix-vector calculus","author":"Hunger","year":"2005"}],"container-title":["IEEE Journal on Selected Areas in Communications"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx8\/49\/11372474\/11180048.pdf?arnumber=11180048","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T05:52:08Z","timestamp":1770789128000},"score":1,"resource":{"primary":{"URL":"https:\/\/ieeexplore.ieee.org\/document\/11180048\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":52,"URL":"https:\/\/doi.org\/10.1109\/jsac.2025.3614195","relation":{},"ISSN":["1558-0008","0733-8716"],"issn-type":[{"value":"1558-0008","type":"electronic"},{"value":"0733-8716","type":"print"}],"subject":[],"published":{"date-parts":[[2026]]}}}