{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T20:17:50Z","timestamp":1778876270118,"version":"3.51.4"},"reference-count":23,"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:\/\/ieeexplore.ieee.org\/Xplorehelp\/downloads\/license-information\/IEEE.html"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-029"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-037"}],"funder":[{"DOI":"10.13039\/501100013352","name":"Jiangxi Province Science and Technology Development Program","doi-asserted-by":"publisher","award":["20242BCC32016"],"award-info":[{"award-number":["20242BCC32016"]}],"id":[{"id":"10.13039\/501100013352","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62471238"],"award-info":[{"award-number":["62471238"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012154","name":"Postgraduate Research and Practice Innovation Program of Jiangsu Province","doi-asserted-by":"publisher","award":["SCJX-0529"],"award-info":[{"award-number":["SCJX-0529"]}],"id":[{"id":"10.13039\/501100012154","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000266","name":"Engineering and Physical Sciences Research Council","doi-asserted-by":"crossref","award":["EP\/W026813\/1"],"award-info":[{"award-number":["EP\/W026813\/1"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Korean Government","award":["RS-2024-00428780"],"award-info":[{"award-number":["RS-2024-00428780"]}]},{"name":"Korean Government","award":["2026-25489110"],"award-info":[{"award-number":["2026-25489110"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IEEE Wireless Commun. Lett."],"published-print":{"date-parts":[[2026]]},"DOI":"10.1109\/lwc.2026.3691385","type":"journal-article","created":{"date-parts":[[2026,5,8]],"date-time":"2026-05-08T19:40:39Z","timestamp":1778269239000},"page":"3059-3063","source":"Crossref","is-referenced-by-count":0,"title":["Cram\u00e9r\u2013Rao Bounds for Activity Detection in Conventional and Fluid Antenna Systems"],"prefix":"10.1109","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-2611-5546","authenticated-orcid":false,"given":"Zhentian","family":"Zhang","sequence":"first","affiliation":[{"name":"National Mobile Communications Research Laboratory, Southeast University, Nanjing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7521-0078","authenticated-orcid":false,"given":"Kai-Kit","family":"Wong","sequence":"additional","affiliation":[{"name":"Department of Electronic and Electrical Engineering, University College London, Torrington, U.K."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6757-4231","authenticated-orcid":false,"given":"Hao","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Cyber Science and Engineering, Southeast University, Nanjing, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8259-6615","authenticated-orcid":false,"given":"Christos","family":"Masouros","sequence":"additional","affiliation":[{"name":"Department of Electronic and Electrical Engineering, University College London, Torrington, U.K."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9561-3341","authenticated-orcid":false,"given":"Chan-Byoung","family":"Chae","sequence":"additional","affiliation":[{"name":"School of Integrated Technology, Yonsei University, Seoul, South Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"263","reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2018.2818082"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1109\/TIT.2021.3065291"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1109\/jstsp.2026.3673148"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2024.3466213"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1109\/LCOMM.2024.3374757"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2020.3037595"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.1109\/COMST.2024.3498855"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1109\/TNSE.2025.3613225"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2025.3632097"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1109\/mwc.2025.3629597"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.002.2400490"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1109\/lwc.2026.3676856"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.3390\/electronics14071458"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1109\/LWC.2025.3594112"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1109\/JSAC.2025.3608113"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1109\/LWC.2026.3666168"},{"key":"ref17","volume-title":"Fundamentals of Statistical Signal Processing, Volume I:, Estimation Theory","author":"Kay","year":"1993"},{"key":"ref18","volume-title":"Spectral Analysis of Signals","author":"Stoica","year":"2005"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2024.3434509"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1561\/0100000001"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.1109\/18.749008"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2018.2795540"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1109\/29.17564"}],"container-title":["IEEE Wireless Communications Letters"],"original-title":[],"link":[{"URL":"http:\/\/xplorestaging.ieee.org\/ielx8\/5962382\/11304577\/11513509.pdf?arnumber=11513509","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T19:54:16Z","timestamp":1778874856000},"score":1,"resource":{"primary":{"URL":"https:\/\/ieeexplore.ieee.org\/document\/11513509\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":23,"URL":"https:\/\/doi.org\/10.1109\/lwc.2026.3691385","relation":{},"ISSN":["2162-2337","2162-2345"],"issn-type":[{"value":"2162-2337","type":"print"},{"value":"2162-2345","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026]]}}}