{"id":"https://openalex.org/W3213744143","doi":"https://doi.org/10.1109/twc.2021.3126646","title":"Joint Channel Estimation and Data Detection in Cell-Free Massive MU-MIMO Systems","display_name":"Joint Channel Estimation and Data Detection in Cell-Free Massive MU-MIMO Systems","publication_year":2021,"publication_date":"2021-11-16","ids":{"openalex":"https://openalex.org/W3213744143","doi":"https://doi.org/10.1109/twc.2021.3126646","mag":"3213744143"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2021.3126646","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2021.3126646","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://research.aalto.fi/en/publications/04e135b3-2123-4da3-b256-1546cbc42216","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5080585828","display_name":"Haochuan Song","orcid":"https://orcid.org/0000-0003-3535-4901"},"institutions":[{"id":"https://openalex.org/I4210155350","display_name":"Purple Mountain Laboratories","ror":"https://ror.org/04zcbk583","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210155350"]},{"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":true,"raw_author_name":"Haochuan Song","raw_affiliation_strings":["LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","Purple Mountain Laboratories, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]},{"raw_affiliation_string":"Purple Mountain Laboratories, Nanjing, China","institution_ids":["https://openalex.org/I4210155350"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060687985","display_name":"Tom Goldstein","orcid":"https://orcid.org/0000-0003-1660-9307"},"institutions":[{"id":"https://openalex.org/I66946132","display_name":"University of Maryland, College Park","ror":"https://ror.org/047s2c258","country_code":"US","type":"education","lineage":["https://openalex.org/I66946132"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Tom Goldstein","raw_affiliation_strings":["Department of Computer Science, University of Maryland, College Park, MD, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science, University of Maryland, College Park, MD, USA","institution_ids":["https://openalex.org/I66946132"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072916702","display_name":"Xiaohu You","orcid":"https://orcid.org/0000-0002-0809-8511"},"institutions":[{"id":"https://openalex.org/I4210155350","display_name":"Purple Mountain Laboratories","ror":"https://ror.org/04zcbk583","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210155350"]},{"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":"Xiaohu You","raw_affiliation_strings":["LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","Purple Mountain Laboratories, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]},{"raw_affiliation_string":"Purple Mountain Laboratories, Nanjing, China","institution_ids":["https://openalex.org/I4210155350"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100380082","display_name":"Chuan Zhang","orcid":"https://orcid.org/0000-0002-7736-6487"},"institutions":[{"id":"https://openalex.org/I4210155350","display_name":"Purple Mountain Laboratories","ror":"https://ror.org/04zcbk583","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210155350"]},{"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":"Chuan Zhang","raw_affiliation_strings":["LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","Purple Mountain Laboratories, Nanjing, China"],"affiliations":[{"raw_affiliation_string":"LEADS and National Mobile Communications Research Laboratory, Southeast University, Nanjing, China","institution_ids":["https://openalex.org/I76569877"]},{"raw_affiliation_string":"Purple Mountain Laboratories, Nanjing, China","institution_ids":["https://openalex.org/I4210155350"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5006597250","display_name":"Olav Tirkkonen","orcid":"https://orcid.org/0000-0002-2611-1636"},"institutions":[{"id":"https://openalex.org/I9927081","display_name":"Aalto University","ror":"https://ror.org/020hwjq30","country_code":"FI","type":"education","lineage":["https://openalex.org/I9927081"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Olav Tirkkonen","raw_affiliation_strings":["Department of Communications and Networking, Aalto University, Espoo, Finland"],"affiliations":[{"raw_affiliation_string":"Department of Communications and Networking, Aalto University, Espoo, Finland","institution_ids":["https://openalex.org/I9927081"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5083617223","display_name":"Christoph Studer","orcid":"https://orcid.org/0000-0001-8950-6267"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Christoph Studer","raw_affiliation_strings":["Department of Information Technology and Electrical Engineering, ETH Zürich, Zürich, Switzerland"],"affiliations":[{"raw_affiliation_string":"Department of Information Technology and Electrical Engineering, ETH Zürich, Zürich, Switzerland","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5080585828"],"corresponding_institution_ids":["https://openalex.org/I4210155350","https://openalex.org/I76569877"],"apc_list":null,"apc_paid":null,"fwci":2.9454,"has_fulltext":false,"cited_by_count":46,"citation_normalized_percentile":{"value":0.91615502,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":94,"max":100},"biblio":{"volume":"21","issue":"6","first_page":"4068","last_page":"4084"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":1.0,"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":1.0,"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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.9994999766349792,"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":0.7678453922271729},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7508047819137573},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.6697522401809692},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5987783074378967},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.5417476296424866},{"id":"https://openalex.org/keywords/bit-error-rate","display_name":"Bit error rate","score":0.4914323091506958},{"id":"https://openalex.org/keywords/joint","display_name":"Joint (building)","score":0.4677128195762634},{"id":"https://openalex.org/keywords/maximum-a-posteriori-estimation","display_name":"Maximum a posteriori estimation","score":0.46645063161849976},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.43566399812698364},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.21243301033973694},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1888505220413208},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.14022907614707947},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.09423843026161194}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7678453922271729},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7508047819137573},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.6697522401809692},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5987783074378967},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.5417476296424866},{"id":"https://openalex.org/C56296756","wikidata":"https://www.wikidata.org/wiki/Q840922","display_name":"Bit error rate","level":3,"score":0.4914323091506958},{"id":"https://openalex.org/C18555067","wikidata":"https://www.wikidata.org/wiki/Q8375051","display_name":"Joint (building)","level":2,"score":0.4677128195762634},{"id":"https://openalex.org/C9810830","wikidata":"https://www.wikidata.org/wiki/Q635384","display_name":"Maximum a posteriori estimation","level":3,"score":0.46645063161849976},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.43566399812698364},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.21243301033973694},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1888505220413208},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.14022907614707947},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.09423843026161194},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C170154142","wikidata":"https://www.wikidata.org/wiki/Q150737","display_name":"Architectural engineering","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/twc.2021.3126646","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2021.3126646","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:aaltodoc.aalto.fi:123456789/118783","is_oa":true,"landing_page_url":"https://research.aalto.fi/en/publications/04e135b3-2123-4da3-b256-1546cbc42216","pdf_url":null,"source":{"id":"https://openalex.org/S4306401662","display_name":"Aaltodoc (Aalto University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I9927081","host_organization_name":"Aalto University","host_organization_lineage":["https://openalex.org/I9927081"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"acceptedVersion"}],"best_oa_location":{"id":"pmh:oai:aaltodoc.aalto.fi:123456789/118783","is_oa":true,"landing_page_url":"https://research.aalto.fi/en/publications/04e135b3-2123-4da3-b256-1546cbc42216","pdf_url":null,"source":{"id":"https://openalex.org/S4306401662","display_name":"Aaltodoc (Aalto University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I9927081","host_organization_name":"Aalto University","host_organization_lineage":["https://openalex.org/I9927081"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"acceptedVersion"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1678299440","display_name":null,"funder_award_id":"2020YFB2205503","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G252193065","display_name":null,"funder_award_id":"61871115","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G4070878159","display_name":null,"funder_award_id":"319484","funder_id":"https://openalex.org/F4320321108","funder_display_name":"Academy of Finland"},{"id":"https://openalex.org/G646053297","display_name":null,"funder_award_id":"62122020","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320321108","display_name":"Academy of Finland","ror":"https://ror.org/05k73zm37"},{"id":"https://openalex.org/F4320335777","display_name":"National Key Research and Development Program of China","ror":null},{"id":"https://openalex.org/F4320335787","display_name":"Fundamental Research Funds for the Central Universities","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":81,"referenced_works":["https://openalex.org/W1584444527","https://openalex.org/W1763302039","https://openalex.org/W1928152501","https://openalex.org/W1949523763","https://openalex.org/W1995875735","https://openalex.org/W2019606325","https://openalex.org/W2064191652","https://openalex.org/W2088525693","https://openalex.org/W2098249016","https://openalex.org/W2100932603","https://openalex.org/W2106434019","https://openalex.org/W2131750568","https://openalex.org/W2132702454","https://openalex.org/W2134395056","https://openalex.org/W2135780853","https://openalex.org/W2138548210","https://openalex.org/W2147656689","https://openalex.org/W2159530242","https://openalex.org/W2171387626","https://openalex.org/W2254069717","https://openalex.org/W2286275639","https://openalex.org/W2388468868","https://openalex.org/W2611311577","https://openalex.org/W2612539894","https://openalex.org/W2742503793","https://openalex.org/W2753160534","https://openalex.org/W2758999846","https://openalex.org/W2791349588","https://openalex.org/W2797535556","https://openalex.org/W2798760276","https://openalex.org/W2799812926","https://openalex.org/W2802123921","https://openalex.org/W2835824805","https://openalex.org/W2883289908","https://openalex.org/W2885833733","https://openalex.org/W2889130186","https://openalex.org/W2889454423","https://openalex.org/W2895984297","https://openalex.org/W2901532570","https://openalex.org/W2907461669","https://openalex.org/W2919645791","https://openalex.org/W2921180372","https://openalex.org/W2940068490","https://openalex.org/W2959675167","https://openalex.org/W2962123958","https://openalex.org/W2963019526","https://openalex.org/W2963095746","https://openalex.org/W2963116507","https://openalex.org/W2963491643","https://openalex.org/W2963517315","https://openalex.org/W2963845287","https://openalex.org/W2964037590","https://openalex.org/W2964050245","https://openalex.org/W2964094639","https://openalex.org/W2965123227","https://openalex.org/W2968074955","https://openalex.org/W2971055251","https://openalex.org/W2974046131","https://openalex.org/W2989824358","https://openalex.org/W3004212706","https://openalex.org/W3013142897","https://openalex.org/W3020123194","https://openalex.org/W3034208300","https://openalex.org/W3034448035","https://openalex.org/W3035475152","https://openalex.org/W3041415426","https://openalex.org/W3042527581","https://openalex.org/W3045519965","https://openalex.org/W3047439598","https://openalex.org/W3089262738","https://openalex.org/W3093756014","https://openalex.org/W3095126011","https://openalex.org/W3098593798","https://openalex.org/W3099019646","https://openalex.org/W3102741204","https://openalex.org/W3160512734","https://openalex.org/W3169380645","https://openalex.org/W3189924144","https://openalex.org/W3215444490","https://openalex.org/W6639321117","https://openalex.org/W6771954818"],"related_works":["https://openalex.org/W2161474341","https://openalex.org/W4302615923","https://openalex.org/W3203142394","https://openalex.org/W2351061015","https://openalex.org/W4220731478","https://openalex.org/W1974101135","https://openalex.org/W2017509870","https://openalex.org/W2120275292","https://openalex.org/W2070062388","https://openalex.org/W2532418359"],"abstract_inverted_index":{"We":[0,103],"propose":[1,82],"a":[2,43,47,143],"joint":[3],"channel":[4,24],"estimation":[5],"and":[6,52,76,89,118,121],"data":[7],"detection":[8],"(JED)":[9],"algorithm":[10,40,109],"for":[11],"densely-populated":[12],"cell-free":[13,58],"massive":[14,59],"multiuser":[15],"(MU)":[16],"multiple-input":[17],"multiple-output":[18],"(MIMO)":[19],"systems,":[20],"which":[21,97,135],"reduces":[22,127],"the":[23,29,55,65,74,79,86,105,128],"training":[25],"overhead":[26,130],"caused":[27],"by":[28],"presence":[30],"of":[31,33,46,57,67,78,107,112,146],"hundreds":[32],"simultaneously":[34,53],"transmitting":[35],"user":[36],"equipments":[37],"(UEs).":[38],"Our":[39],"iteratively":[41],"solves":[42],"relaxed":[44],"version":[45],"maximum":[48],"a-posteriori":[49],"JED":[50,125],"problem":[51],"exploits":[54],"sparsity":[56],"MU-MIMO":[60],"channels":[61],"as":[62,64],"well":[63],"boundedness":[66],"QAM":[68],"constellations.":[69],"In":[70],"order":[71],"to":[72,92,99,132,142],"improve":[73],"performance":[75,106],"convergence":[77],"algorithm,":[80],"we":[81,122],"methods":[83],"that":[84,124],"permute":[85],"access":[87],"point":[88],"UE":[90],"indices":[91],"form":[93],"so-called":[94],"virtual":[95],"cells,":[96],"leads":[98],"better":[100],"initial":[101],"solutions.":[102],"assess":[104],"our":[108],"in":[110],"terms":[111],"root-mean-squared-symbol":[113],"error,":[114],"bit":[115],"error":[116],"rate,":[117],"mutual":[119],"information,":[120],"demonstrate":[123],"significantly":[126],"pilot":[129],"compared":[131],"orthogonal":[133],"training,":[134],"enables":[136],"reliable":[137],"communication":[138],"with":[139],"short":[140],"packets":[141],"large":[144],"number":[145],"UEs.":[147]},"counts_by_year":[{"year":2025,"cited_by_count":17},{"year":2024,"cited_by_count":12},{"year":2023,"cited_by_count":11},{"year":2022,"cited_by_count":4},{"year":2021,"cited_by_count":2}],"updated_date":"2026-04-02T15:55:50.835912","created_date":"2025-10-10T00:00:00"}