{"id":"https://openalex.org/W4408947401","doi":"https://doi.org/10.1109/twc.2025.3553438","title":"Downlink Beamforming for Cell-Free ISAC: A Fast Complex Oblique Manifold Approach","display_name":"Downlink Beamforming for Cell-Free ISAC: A Fast Complex Oblique Manifold Approach","publication_year":2025,"publication_date":"2025-03-28","ids":{"openalex":"https://openalex.org/W4408947401","doi":"https://doi.org/10.1109/twc.2025.3553438"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2025.3553438","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3553438","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":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5072820195","display_name":"Shayan Zargari","orcid":"https://orcid.org/0000-0003-1660-4733"},"institutions":[{"id":"https://openalex.org/I154425047","display_name":"University of Alberta","ror":"https://ror.org/0160cpw27","country_code":"CA","type":"education","lineage":["https://openalex.org/I154425047"]}],"countries":["CA"],"is_corresponding":true,"raw_author_name":"Shayan Zargari","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada"],"raw_orcid":"https://orcid.org/0000-0003-1660-4733","affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada","institution_ids":["https://openalex.org/I154425047"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5074570519","display_name":"Diluka Galappaththige","orcid":"https://orcid.org/0000-0001-9644-9547"},"institutions":[{"id":"https://openalex.org/I154425047","display_name":"University of Alberta","ror":"https://ror.org/0160cpw27","country_code":"CA","type":"education","lineage":["https://openalex.org/I154425047"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Diluka Galappaththige","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada"],"raw_orcid":"https://orcid.org/0000-0001-9644-9547","affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada","institution_ids":["https://openalex.org/I154425047"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060881187","display_name":"Chintha Tellambura","orcid":"https://orcid.org/0000-0002-9419-7195"},"institutions":[{"id":"https://openalex.org/I154425047","display_name":"University of Alberta","ror":"https://ror.org/0160cpw27","country_code":"CA","type":"education","lineage":["https://openalex.org/I154425047"]}],"countries":["CA"],"is_corresponding":false,"raw_author_name":"Chintha Tellambura","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada"],"raw_orcid":"https://orcid.org/0000-0002-9419-7195","affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada","institution_ids":["https://openalex.org/I154425047"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5039289964","display_name":"Geoffrey Ye Li","orcid":"https://orcid.org/0000-0002-7894-2415"},"institutions":[{"id":"https://openalex.org/I154425047","display_name":"University of Alberta","ror":"https://ror.org/0160cpw27","country_code":"CA","type":"education","lineage":["https://openalex.org/I154425047"]},{"id":"https://openalex.org/I47508984","display_name":"Imperial College London","ror":"https://ror.org/041kmwe10","country_code":"GB","type":"education","lineage":["https://openalex.org/I47508984"]}],"countries":["CA","GB"],"is_corresponding":false,"raw_author_name":"Geoffrey Ye Li","raw_affiliation_strings":["Department of Electrical and Electronic Engineering, ITP Laboratory, Imperial College London, London, U.K","Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada"],"raw_orcid":"https://orcid.org/0000-0002-7894-2415","affiliations":[{"raw_affiliation_string":"Department of Electrical and Electronic Engineering, ITP Laboratory, Imperial College London, London, U.K","institution_ids":["https://openalex.org/I47508984"]},{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada","institution_ids":["https://openalex.org/I154425047"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5072820195"],"corresponding_institution_ids":["https://openalex.org/I154425047"],"apc_list":null,"apc_paid":null,"fwci":38.3021,"has_fulltext":false,"cited_by_count":8,"citation_normalized_percentile":{"value":0.99590408,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":98,"max":99},"biblio":{"volume":"24","issue":"8","first_page":"6458","last_page":"6474"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11946","display_name":"Antenna Design and Optimization","score":0.9976999759674072,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace 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/T11946","display_name":"Antenna Design and Optimization","score":0.9976999759674072,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace 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/T10069","display_name":"Antenna Design and Analysis","score":0.9969000220298767,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace 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/T11932","display_name":"Wireless Body Area Networks","score":0.9965000152587891,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical 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/beamforming","display_name":"Beamforming","score":0.7364736795425415},{"id":"https://openalex.org/keywords/oblique-case","display_name":"Oblique case","score":0.6831055879592896},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.6507986783981323},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6247797012329102},{"id":"https://openalex.org/keywords/manifold","display_name":"Manifold (fluid mechanics)","score":0.49087315797805786},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.3422868251800537},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.1108945906162262}],"concepts":[{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.7364736795425415},{"id":"https://openalex.org/C160697094","wikidata":"https://www.wikidata.org/wiki/Q1233197","display_name":"Oblique case","level":2,"score":0.6831055879592896},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.6507986783981323},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6247797012329102},{"id":"https://openalex.org/C529865628","wikidata":"https://www.wikidata.org/wiki/Q1790740","display_name":"Manifold (fluid mechanics)","level":2,"score":0.49087315797805786},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.3422868251800537},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.1108945906162262},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/twc.2025.3553438","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3553438","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"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2548963335","https://openalex.org/W2159941915","https://openalex.org/W1995129237","https://openalex.org/W4388081250","https://openalex.org/W2909457694","https://openalex.org/W1761601995","https://openalex.org/W2904599916","https://openalex.org/W4321608401","https://openalex.org/W4300468626","https://openalex.org/W3193749313"],"abstract_inverted_index":{"Cell-free":[0],"integrated":[1],"sensing":[2,32,76],"and":[3,31,42,79,116,126,155,168,177,195],"communication":[4,29,71,186],"(CF-ISAC)":[5],"systems":[6],"are":[7,49,133],"just":[8],"emerging":[9],"as":[10,136],"an":[11],"interesting":[12],"technique":[13],"for":[14,100],"future":[15],"communications.":[16],"Such":[17],"a":[18,54,91,118],"system":[19],"comprises":[20],"several":[21],"multiple-antenna":[22],"access":[23],"points":[24],"(APs),":[25],"serving":[26],"multiple":[27],"single-antenna":[28],"users":[30],"targets.":[33],"However,":[34],"efficient":[35,93],"beamforming":[36,56,193],"designs":[37],"that":[38],"achieve":[39],"high":[40],"precision":[41],"robust":[43],"performance":[44],"in":[45,185],"densely":[46],"populated":[47],"networks":[48],"lacking.":[50],"This":[51,107],"paper":[52],"proposes":[53],"new":[55],"algorithm":[57,104,108,141,164,190],"by":[58],"exploiting":[59],"the":[60,70,101,110,113,175,188],"inherent":[61],"Riemannian":[62],"manifold":[63,98],"structure.":[64],"The":[65,139],"aim":[66],"is":[67,105],"to":[68,183],"maximize":[69],"sum":[72,171],"rate":[73,172],"while":[74],"satisfying":[75],"beampattern":[77],"gains":[78,173,194],"per":[80],"AP":[81],"transmit":[82,158],"power":[83,159],"constraints.":[84],"To":[85],"address":[86],"this":[87],"constrained":[88],"optimization":[89,99],"problem,":[90],"highly":[92],"augmented":[94],"Lagrangian":[95],"model-based":[96],"iterative":[97],"CF-ISAC":[102],"(ALMCI)":[103],"developed.":[106],"exploits":[109],"geometry":[111],"of":[112,145],"proposed":[114,162],"problem":[115],"uses":[117],"complex":[119,128],"oblique":[120],"manifold.":[121],"Conventional":[122],"convex-concave":[123],"procedure":[124],"(CCPA)":[125],"multidimensional":[127],"quadratic":[129],"transform":[130],"(MCQT)-SCA":[131],"algorithms":[132],"also":[134],"developed":[135],"comparative":[137],"benchmarks.":[138],"ALMCI":[140,163,189],"significantly":[142],"outperforms":[143],"both":[144],"these.":[146],"For":[147],"example,":[148],"with":[149],"16":[150],"APs":[151],"having":[152],"12":[153],"antennas":[154],"30":[156],"dBm":[157],"each,":[160],"our":[161],"yields":[165],"22.7":[166],"%":[167,170],"6.7":[169],"over":[174],"CCPA":[176],"MCQT-SCA":[178],"algorithms,":[179],"respectively.":[180],"In":[181],"addition":[182],"improvement":[184],"capacity,":[187],"achieves":[191],"superior":[192],"reduced":[196],"complexity.":[197]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":6}],"updated_date":"2025-12-28T23:10:05.387466","created_date":"2025-10-10T00:00:00"}
