{"id":"https://openalex.org/W7147331011","doi":"https://doi.org/10.1109/icaiic68212.2026.11454221","title":"A Survey on AI-Enhanced CSI Feedback in Cell-Free Massive MIMO","display_name":"A Survey on AI-Enhanced CSI Feedback in Cell-Free Massive MIMO","publication_year":2026,"publication_date":"2026-02-24","ids":{"openalex":"https://openalex.org/W7147331011","doi":"https://doi.org/10.1109/icaiic68212.2026.11454221"},"language":null,"primary_location":{"id":"doi:10.1109/icaiic68212.2026.11454221","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icaiic68212.2026.11454221","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 International Conference on Artificial Intelligence in Information and Communication (ICAIIC)","raw_type":"proceedings-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/A5132653728","display_name":"Seongjin Choi","orcid":null},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Seongjin Choi","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5127882034","display_name":"Donghyun Lee","orcid":null},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Donghyun Lee","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044938274","display_name":"Junsuk Oh","orcid":"https://orcid.org/0000-0001-7855-6461"},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Junsuk Oh","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072670475","display_name":"Thanh Phung Truong","orcid":"https://orcid.org/0000-0003-1196-3593"},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Thanh Phung Truong","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5066875841","display_name":"Seungchan Lee","orcid":null},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Seungchan Lee","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012727837","display_name":"J.C. Kim","orcid":"https://orcid.org/0000-0001-8046-1621"},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Juyoung Kim","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5041978875","display_name":"Sungrae Cho","orcid":"https://orcid.org/0000-0003-1879-688X"},"institutions":[{"id":"https://openalex.org/I67900169","display_name":"Chung-Ang University","ror":"https://ror.org/01r024a98","country_code":"KR","type":"education","lineage":["https://openalex.org/I67900169"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Sungrae Cho","raw_affiliation_strings":["School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Chung-Ang University,Seoul,South Korea,06974","institution_ids":["https://openalex.org/I67900169"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":7,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.43386767,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"120","last_page":"122"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.6050000190734863,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.6050000190734863,"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/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.07810000330209732,"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/T12791","display_name":"Full-Duplex Wireless Communications","score":0.06750000268220901,"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/mimo","display_name":"MIMO","score":0.7046999931335449},{"id":"https://openalex.org/keywords/scalability","display_name":"Scalability","score":0.5918999910354614},{"id":"https://openalex.org/keywords/channel-state-information","display_name":"Channel state information","score":0.564300000667572},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.5131999850273132},{"id":"https://openalex.org/keywords/key","display_name":"Key (lock)","score":0.44179999828338623},{"id":"https://openalex.org/keywords/scheduling","display_name":"Scheduling (production processes)","score":0.4117000102996826},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.40959998965263367},{"id":"https://openalex.org/keywords/mimo-ofdm","display_name":"MIMO-OFDM","score":0.3750999867916107}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7666000127792358},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7046999931335449},{"id":"https://openalex.org/C48044578","wikidata":"https://www.wikidata.org/wiki/Q727490","display_name":"Scalability","level":2,"score":0.5918999910354614},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.564300000667572},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.5131999850273132},{"id":"https://openalex.org/C120314980","wikidata":"https://www.wikidata.org/wiki/Q180634","display_name":"Distributed computing","level":1,"score":0.4797999858856201},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.44179999828338623},{"id":"https://openalex.org/C206729178","wikidata":"https://www.wikidata.org/wiki/Q2271896","display_name":"Scheduling (production processes)","level":2,"score":0.4117000102996826},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.40959998965263367},{"id":"https://openalex.org/C130946814","wikidata":"https://www.wikidata.org/wiki/Q5988271","display_name":"MIMO-OFDM","level":4,"score":0.3750999867916107},{"id":"https://openalex.org/C186886427","wikidata":"https://www.wikidata.org/wiki/Q5441213","display_name":"Feedback loop","level":2,"score":0.3718999922275543},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.36809998750686646},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.3465999960899353},{"id":"https://openalex.org/C165650700","wikidata":"https://www.wikidata.org/wiki/Q4636347","display_name":"3G MIMO","level":4,"score":0.34139999747276306},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3228999972343445},{"id":"https://openalex.org/C113775141","wikidata":"https://www.wikidata.org/wiki/Q428691","display_name":"Computer engineering","level":1,"score":0.32190001010894775},{"id":"https://openalex.org/C91330434","wikidata":"https://www.wikidata.org/wiki/Q738298","display_name":"Multi-user MIMO","level":4,"score":0.3068999946117401},{"id":"https://openalex.org/C108037233","wikidata":"https://www.wikidata.org/wiki/Q11375","display_name":"Wireless network","level":3,"score":0.2791999876499176},{"id":"https://openalex.org/C2777735758","wikidata":"https://www.wikidata.org/wiki/Q817765","display_name":"Path (computing)","level":2,"score":0.27730000019073486},{"id":"https://openalex.org/C31395832","wikidata":"https://www.wikidata.org/wiki/Q1318674","display_name":"Testbed","level":2,"score":0.2680000066757202},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.265500009059906},{"id":"https://openalex.org/C2779965156","wikidata":"https://www.wikidata.org/wiki/Q5227350","display_name":"Data sharing","level":3,"score":0.25429999828338623},{"id":"https://openalex.org/C3018651601","wikidata":"https://www.wikidata.org/wiki/Q183635","display_name":"Feedback control","level":2,"score":0.25360000133514404},{"id":"https://openalex.org/C186967261","wikidata":"https://www.wikidata.org/wiki/Q5082128","display_name":"Mobile device","level":2,"score":0.25}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/icaiic68212.2026.11454221","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icaiic68212.2026.11454221","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 International Conference on Artificial Intelligence in Information and Communication (ICAIIC)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Partnerships for the goals","id":"https://metadata.un.org/sdg/17","score":0.5574090480804443}],"awards":[{"id":"https://openalex.org/G4032114371","display_name":null,"funder_award_id":"IITP-2026-RS-2022-00156353,IITP-2026-RS-2023-00258639","funder_id":"https://openalex.org/F4320322613","funder_display_name":"Teollisuuden Voima Oyj"}],"funders":[{"id":"https://openalex.org/F4320322613","display_name":"Teollisuuden Voima Oyj","ror":"https://ror.org/00qsw2f44"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W2113271807","https://openalex.org/W2286275639","https://openalex.org/W2964042011","https://openalex.org/W3016621379","https://openalex.org/W3112756300","https://openalex.org/W3126373016","https://openalex.org/W4205806546","https://openalex.org/W4285817698","https://openalex.org/W4312735976","https://openalex.org/W4368232630","https://openalex.org/W4388248463","https://openalex.org/W4391693462"],"related_works":[],"abstract_inverted_index":{"Massive":[0,30],"MIMO":[1,31],"has":[2],"become":[3],"a":[4,38,80,165],"cornerstone":[5],"of":[6,41,83,171],"modern":[7],"wireless":[8,177],"communication,":[9],"yet":[10],"its":[11],"performance":[12],"in":[13,66,86,139,161],"traditional":[14],"cell-centric":[15],"architectures":[16],"remains":[17],"constrained":[18],"by":[19,36],"inter-cell":[20],"interference":[21],"and":[22,59,111,121,123,126,146,158],"feedback":[23,73,89,110,118,140,156],"overhead.":[24],"To":[25],"address":[26],"these":[27,134],"limitations,":[28],"Cell-Free":[29],"(CF-mMIMO)":[32],"eliminates":[33],"cell":[34],"boundaries":[35],"allowing":[37],"large":[39],"number":[40],"distributed":[42,159],"access":[43],"points":[44],"(APs)":[45],"to":[46],"cooperatively":[47],"serve":[48],"users.":[49],"However,":[50],"the":[51,169],"system's":[52],"efficiency":[53],"still":[54],"depends":[55],"critically":[56],"on":[57],"accurate":[58],"efficient":[60],"Channel":[61],"State":[62],"Information":[63],"(CSI)":[64],"acquisition-particularly":[65],"Frequency":[67],"Division":[68],"Duplexing":[69],"(FDD)":[70],"systems":[71],"where":[72],"overhead":[74,141],"is":[75],"substantial.":[76],"This":[77],"paper":[78],"presents":[79],"comprehensive":[81],"survey":[82],"recent":[84],"advancements":[85],"AI-enhanced":[87],"CSI":[88],"techniques":[90],"tailored":[91],"for":[92,109,154],"CF-mMIMO":[93,162],"systems.":[94,178],"Specifically,":[95],"we":[96],"review":[97],"five":[98],"key":[99],"research":[100],"directions:":[101],"1)":[102],"deep":[103,132],"convolutional":[104],"compression,":[105],"2)":[106],"end-to-end":[107],"learning":[108],"precoding,":[112],"3)":[113],"implicit":[114],"feedback,":[115],"4)":[116],"predictive":[117],"using":[119],"Transformers":[120],"meta-learning,":[122],"5)":[124],"variable-rate":[125],"variable-length":[127],"adaptive":[128],"encoding.":[129],"By":[130],"leveraging":[131],"learning,":[133],"approaches":[135],"achieve":[136],"significant":[137],"reductions":[138],"while":[142],"maintaining":[143],"reconstruction":[144],"accuracy":[145],"temporal":[147],"adaptability.":[148],"Furthermore,":[149],"they":[150],"open":[151],"promising":[152],"opportunities":[153],"dynamic":[155],"scheduling":[157],"cooperation":[160],"networks,":[163],"offering":[164],"scalable":[166],"path":[167],"toward":[168],"realization":[170],"AI-native":[172],"<tex":[173],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[174],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">$\\mathbf{6":[175],"G}$</tex>":[176]},"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2026-04-02T00:00:00"}