{"id":"https://openalex.org/W7117120063","doi":"https://doi.org/10.1109/twc.2025.3645270","title":"Tensor-Based Near-Field Channel Estimation for XL-RIS-Assisted Terahertz Systems","display_name":"Tensor-Based Near-Field Channel Estimation for XL-RIS-Assisted Terahertz Systems","publication_year":2025,"publication_date":"2025-12-24","ids":{"openalex":"https://openalex.org/W7117120063","doi":"https://doi.org/10.1109/twc.2025.3645270"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2025.3645270","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3645270","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://pureadmin.qub.ac.uk/ws/files/664438261/Tensor-Based_Near-Field_Channel_Estimation_for_XL-RIS-Assisted_Terahertz_Systems.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5121197226","display_name":"Hao Liu","orcid":null},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Hao Liu","raw_affiliation_strings":["School of Information Science and Engineering, Southeast University, Nanjing, China"],"raw_orcid":"https://orcid.org/0009-0007-0774-7835","affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5007951770","display_name":"Yuxing Lin","orcid":"https://orcid.org/0000-0002-1216-2926"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yuxing Lin","raw_affiliation_strings":["School of Information Science and Engineering, Southeast University, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0002-1216-2926","affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Xiao Li","orcid":"https://orcid.org/0000-0001-9660-9053"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiao Li","raw_affiliation_strings":["School of Information Science and Engineering, Southeast University, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0001-9660-9053","affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5121191787","display_name":"Michail Matthaiou","orcid":null},"institutions":[{"id":"https://openalex.org/I126231945","display_name":"Queen's University Belfast","ror":"https://ror.org/00hswnk62","country_code":"GB","type":"education","lineage":["https://openalex.org/I126231945"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Michail Matthaiou","raw_affiliation_strings":["Centre for Wireless Innovation (CWI), Queen’s University Belfast, Belfast, U.K"],"raw_orcid":"https://orcid.org/0000-0001-9235-7741","affiliations":[{"raw_affiliation_string":"Centre for Wireless Innovation (CWI), Queen’s University Belfast, Belfast, U.K","institution_ids":["https://openalex.org/I126231945"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5121083826","display_name":"Shi Jin","orcid":null},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Shi Jin","raw_affiliation_strings":["School of Information Science and Engineering, Southeast University, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0003-0271-6021","affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":{"value":0.48122434,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"25","issue":null,"first_page":"8954","last_page":"8967"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.6844000220298767,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.6844000220298767,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.09960000216960907,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.054099999368190765,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/singular-value-decomposition","display_name":"Singular value decomposition","score":0.6898000240325928},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6033999919891357},{"id":"https://openalex.org/keywords/terahertz-radiation","display_name":"Terahertz radiation","score":0.4742000102996826},{"id":"https://openalex.org/keywords/tensor","display_name":"Tensor (intrinsic definition)","score":0.460999995470047},{"id":"https://openalex.org/keywords/covariance","display_name":"Covariance","score":0.4383000135421753},{"id":"https://openalex.org/keywords/covariance-matrix","display_name":"Covariance matrix","score":0.42089998722076416},{"id":"https://openalex.org/keywords/computational-complexity-theory","display_name":"Computational complexity theory","score":0.4065000116825104},{"id":"https://openalex.org/keywords/least-squares-function-approximation","display_name":"Least-squares function approximation","score":0.3871000111103058}],"concepts":[{"id":"https://openalex.org/C22789450","wikidata":"https://www.wikidata.org/wiki/Q420904","display_name":"Singular value decomposition","level":2,"score":0.6898000240325928},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6033999919891357},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5475000143051147},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5281000137329102},{"id":"https://openalex.org/C107816215","wikidata":"https://www.wikidata.org/wiki/Q647887","display_name":"Terahertz radiation","level":2,"score":0.4742000102996826},{"id":"https://openalex.org/C155281189","wikidata":"https://www.wikidata.org/wiki/Q3518150","display_name":"Tensor (intrinsic definition)","level":2,"score":0.460999995470047},{"id":"https://openalex.org/C178650346","wikidata":"https://www.wikidata.org/wiki/Q201984","display_name":"Covariance","level":2,"score":0.4383000135421753},{"id":"https://openalex.org/C185142706","wikidata":"https://www.wikidata.org/wiki/Q1134404","display_name":"Covariance matrix","level":2,"score":0.42089998722076416},{"id":"https://openalex.org/C179799912","wikidata":"https://www.wikidata.org/wiki/Q205084","display_name":"Computational complexity theory","level":2,"score":0.4065000116825104},{"id":"https://openalex.org/C9936470","wikidata":"https://www.wikidata.org/wiki/Q6510405","display_name":"Least-squares function approximation","level":3,"score":0.3871000111103058},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.36820000410079956},{"id":"https://openalex.org/C42355184","wikidata":"https://www.wikidata.org/wiki/Q1361088","display_name":"Matrix decomposition","level":3,"score":0.3643999993801117},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.33640000224113464},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.3197000026702881},{"id":"https://openalex.org/C2777735758","wikidata":"https://www.wikidata.org/wiki/Q817765","display_name":"Path (computing)","level":2,"score":0.31690001487731934},{"id":"https://openalex.org/C194273485","wikidata":"https://www.wikidata.org/wiki/Q1478845","display_name":"Path loss","level":3,"score":0.31459999084472656},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.31369999051094055},{"id":"https://openalex.org/C101765175","wikidata":"https://www.wikidata.org/wiki/Q577764","display_name":"Communications system","level":2,"score":0.2957000136375427},{"id":"https://openalex.org/C2780801425","wikidata":"https://www.wikidata.org/wiki/Q5164392","display_name":"Construct (python library)","level":2,"score":0.2833999991416931},{"id":"https://openalex.org/C2778755073","wikidata":"https://www.wikidata.org/wiki/Q10858537","display_name":"Scale (ratio)","level":2,"score":0.2791000008583069},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.25929999351501465},{"id":"https://openalex.org/C10390562","wikidata":"https://www.wikidata.org/wiki/Q581809","display_name":"Spline (mechanical)","level":2,"score":0.2572000026702881},{"id":"https://openalex.org/C77618280","wikidata":"https://www.wikidata.org/wiki/Q1155772","display_name":"Scheme (mathematics)","level":2,"score":0.2517000138759613},{"id":"https://openalex.org/C109282560","wikidata":"https://www.wikidata.org/wiki/Q4166054","display_name":"Singular value","level":3,"score":0.2513999938964844}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/twc.2025.3645270","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3645270","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless Communications","raw_type":"journal-article"},{"id":"pmh:oai:pure.qub.ac.uk/portal:openaire/afcb68b8-e96b-47e4-ab43-339327c2d814","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/afcb68b8-e96b-47e4-ab43-339327c2d814","pdf_url":"https://pureadmin.qub.ac.uk/ws/files/664438261/Tensor-Based_Near-Field_Channel_Estimation_for_XL-RIS-Assisted_Terahertz_Systems.pdf","source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Liu, H, Lin, Y, Li, X, Matthaiou, M & Jin, S 2026, 'Tensor-based near-field channel estimation for XL-RIS-assisted terahertz systems', IEEE Transactions on Wireless Communications, vol. 25, pp. 8954-8967. https://doi.org/10.1109/TWC.2025.3645270","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"pmh:oai:pure.qub.ac.uk/portal:openaire/afcb68b8-e96b-47e4-ab43-339327c2d814","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/afcb68b8-e96b-47e4-ab43-339327c2d814","pdf_url":"https://pureadmin.qub.ac.uk/ws/files/664438261/Tensor-Based_Near-Field_Channel_Estimation_for_XL-RIS-Assisted_Terahertz_Systems.pdf","source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Liu, H, Lin, Y, Li, X, Matthaiou, M & Jin, S 2026, 'Tensor-based near-field channel estimation for XL-RIS-assisted terahertz systems', IEEE Transactions on Wireless Communications, vol. 25, pp. 8954-8967. https://doi.org/10.1109/TWC.2025.3645270","raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1003364742","display_name":null,"funder_award_id":"62261160576","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G1699735358","display_name":null,"funder_award_id":"2024QNRC001","funder_id":"https://openalex.org/F4320311778","funder_display_name":"China Association for Science and Technology"},{"id":"https://openalex.org/G3363585228","display_name":null,"funder_award_id":"BE2023022","funder_id":"https://openalex.org/F4320335956","funder_display_name":"Key Technologies Research and Development Program of Guangzhou"},{"id":"https://openalex.org/G342761634","display_name":null,"funder_award_id":"62231009","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G5764895999","display_name":null,"funder_award_id":"BK20230821","funder_id":"https://openalex.org/F4320322769","funder_display_name":"Natural Science Foundation of Jiangsu Province"},{"id":"https://openalex.org/G7101942999","display_name":null,"funder_award_id":"BE2023022-1","funder_id":"https://openalex.org/F4320335956","funder_display_name":"Key Technologies Research and Development Program of Guangzhou"},{"id":"https://openalex.org/G7615822582","display_name":null,"funder_award_id":"62301153","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7737642386","display_name":null,"funder_award_id":"2022M720728","funder_id":"https://openalex.org/F4320321543","funder_display_name":"China Postdoctoral Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320311778","display_name":"China Association for Science and Technology","ror":"https://ror.org/035vmht26"},{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320321332","display_name":"Kyung Hee University","ror":"https://ror.org/01zqcg218"},{"id":"https://openalex.org/F4320321543","display_name":"China Postdoctoral Science Foundation","ror":"https://ror.org/0426zh255"},{"id":"https://openalex.org/F4320321605","display_name":"Government of Jiangsu Province","ror":"https://ror.org/004svx814"},{"id":"https://openalex.org/F4320322769","display_name":"Natural Science Foundation of Jiangsu Province","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320324856","display_name":"Southeast University","ror":"https://ror.org/04ct4d772"},{"id":"https://openalex.org/F4320335956","display_name":"Key Technologies Research and Development Program of Guangzhou","ror":null}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7117120063.pdf","grobid_xml":"https://content.openalex.org/works/W7117120063.grobid-xml"},"referenced_works_count":50,"referenced_works":["https://openalex.org/W2097452680","https://openalex.org/W2102084773","https://openalex.org/W2103472722","https://openalex.org/W2115485558","https://openalex.org/W2132639093","https://openalex.org/W2294775169","https://openalex.org/W2622044750","https://openalex.org/W2794693724","https://openalex.org/W2937693915","https://openalex.org/W2953900845","https://openalex.org/W2965565138","https://openalex.org/W3001613668","https://openalex.org/W3010695123","https://openalex.org/W3013945510","https://openalex.org/W3021335732","https://openalex.org/W3025201079","https://openalex.org/W3034448035","https://openalex.org/W3038533179","https://openalex.org/W3048745140","https://openalex.org/W3080147229","https://openalex.org/W3091365446","https://openalex.org/W3108957811","https://openalex.org/W3121978485","https://openalex.org/W3122591164","https://openalex.org/W3128596355","https://openalex.org/W3129410599","https://openalex.org/W3129486236","https://openalex.org/W3134059753","https://openalex.org/W3134454378","https://openalex.org/W3137147147","https://openalex.org/W3144244478","https://openalex.org/W3198279229","https://openalex.org/W3202330278","https://openalex.org/W3202938391","https://openalex.org/W3208187232","https://openalex.org/W4210772610","https://openalex.org/W4225575004","https://openalex.org/W4226073470","https://openalex.org/W4297094903","https://openalex.org/W4312982454","https://openalex.org/W4313123768","https://openalex.org/W4320029469","https://openalex.org/W4320713354","https://openalex.org/W4360897390","https://openalex.org/W4380520376","https://openalex.org/W4381832497","https://openalex.org/W4388692027","https://openalex.org/W4404132494","https://openalex.org/W4405754129","https://openalex.org/W4408017156"],"related_works":[],"abstract_inverted_index":{"In":[0,18,98],"terahertz":[1],"(THz)":[2],"communication":[3,15,39],"systems,":[4],"extremely":[5,31],"large":[6,32],"scale":[7],"arrays":[8],"can":[9],"effectively":[10],"compensate":[11],"for":[12,29,94,131],"the":[13,23,56,60,66,70,82,95,99,103,107,114,121,132,140,146],"limited":[14],"distance":[16,96],"problem.":[17],"this":[19],"article,":[20],"we":[21,64,74,101,124],"consider":[22],"near-field":[24,45],"channel":[25,46,62],"estimation":[26],"(CE)":[27],"problem":[28],"an":[30],"reconfigurable":[33],"intelligence":[34],"surface":[35],"(XL-RIS)-assisted":[36],"multi-user":[37],"THz":[38],"system.":[40],"We":[41],"first":[42],"construct":[43,125],"a":[44,50,76,87,126],"model":[47],"based":[48],"on":[49],"second-order":[51],"Fresnel":[52],"approximation":[53],"derivation.":[54],"Utilizing":[55],"spatial":[57],"structure":[58],"of":[59,69,152],"derived":[61],"model,":[63],"sample":[65],"covariance":[67],"matrix":[68],"received":[71],"signals.":[72],"Then,":[73],"propose":[75],"tensor":[77,128],"decomposition-based":[78],"algorithm":[79,93],"to":[80,118],"estimate":[81,102],"angular":[83,133],"parameters,":[84],"and":[85,112,154],"establish":[86],"truncated":[88],"singular":[89],"value":[90],"decomposition":[91],"(T-SVD)":[92],"estimation.":[97,135],"end,":[100],"path":[104],"losses":[105],"through":[106],"least":[108],"squares":[109],"(LS)":[110],"method":[111],"recover":[113],"complete":[115],"channel.":[116],"Moreover,":[117],"further":[119],"reduce":[120],"computational":[122,155],"overhead,":[123],"low-complexity":[127],"completion-based":[129],"scheme":[130],"parameters\u2019":[134],"Simulation":[136],"results":[137],"indicate":[138],"that":[139],"proposed":[141],"tensor-based":[142],"CE":[143],"schemes":[144],"outperform":[145],"conventional":[147],"subspace-based":[148],"approaches":[149],"in":[150],"terms":[151],"accuracy":[153],"complexity.":[156]},"counts_by_year":[],"updated_date":"2026-01-11T23:08:45.486102","created_date":"2025-12-24T00:00:00"}