{"id":"https://openalex.org/W4292070204","doi":"https://doi.org/10.1109/lwc.2022.3177429","title":"Uplink Channel Estimation With Reduced Fronthaul Overhead in Cell-Free Massive MIMO Systems","display_name":"Uplink Channel Estimation With Reduced Fronthaul Overhead in Cell-Free Massive MIMO Systems","publication_year":2022,"publication_date":"2022-05-24","ids":{"openalex":"https://openalex.org/W4292070204","doi":"https://doi.org/10.1109/lwc.2022.3177429"},"language":"en","primary_location":{"id":"doi:10.1109/lwc.2022.3177429","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lwc.2022.3177429","pdf_url":null,"source":{"id":"https://openalex.org/S2500830676","display_name":"IEEE Wireless Communications Letters","issn_l":"2162-2337","issn":["2162-2337","2162-2345"],"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 Wireless Communications Letters","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/A5048297544","display_name":"Tianyu Zhao","orcid":"https://orcid.org/0000-0003-2401-4098"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Tianyu Zhao","raw_affiliation_strings":["Communications Research Center, Harbin Institute of Technology, Harbin, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Communications Research Center, Harbin Institute of Technology, Harbin, China","institution_ids":["https://openalex.org/I204983213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100607349","display_name":"Shuyi Chen","orcid":"https://orcid.org/0000-0002-5169-807X"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Shuyi Chen","raw_affiliation_strings":["Communications Research Center, Harbin Institute of Technology, Harbin, China"],"raw_orcid":"https://orcid.org/0000-0002-5169-807X","affiliations":[{"raw_affiliation_string":"Communications Research Center, Harbin Institute of Technology, Harbin, China","institution_ids":["https://openalex.org/I204983213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100371683","display_name":"Ruoyu Zhang","orcid":"https://orcid.org/0000-0002-4105-5310"},"institutions":[{"id":"https://openalex.org/I36399199","display_name":"Nanjing University of Science and Technology","ror":"https://ror.org/00xp9wg62","country_code":"CN","type":"education","lineage":["https://openalex.org/I36399199"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ruoyu Zhang","raw_affiliation_strings":["Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0002-4105-5310","affiliations":[{"raw_affiliation_string":"Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing, China","institution_ids":["https://openalex.org/I36399199"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5084739355","display_name":"Hsiao\u2010Hwa Chen","orcid":"https://orcid.org/0000-0001-8473-0729"},"institutions":[{"id":"https://openalex.org/I91807558","display_name":"National Cheng Kung University","ror":"https://ror.org/01b8kcc49","country_code":"TW","type":"education","lineage":["https://openalex.org/I91807558"]}],"countries":["TW"],"is_corresponding":false,"raw_author_name":"Hsiao-Hwa Chen","raw_affiliation_strings":["Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan"],"raw_orcid":"https://orcid.org/0000-0001-8473-0729","affiliations":[{"raw_affiliation_string":"Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan","institution_ids":["https://openalex.org/I91807558"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5046141922","display_name":"Qing Guo","orcid":"https://orcid.org/0000-0003-4209-5469"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Qing Guo","raw_affiliation_strings":["Communications Research Center, Harbin Institute of Technology, Harbin, China"],"raw_orcid":"https://orcid.org/0000-0003-4209-5469","affiliations":[{"raw_affiliation_string":"Communications Research Center, Harbin Institute of Technology, Harbin, China","institution_ids":["https://openalex.org/I204983213"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.8835,"has_fulltext":false,"cited_by_count":10,"citation_normalized_percentile":{"value":0.71838672,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"11","issue":"8","first_page":"1718","last_page":"1722"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9998999834060669,"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":0.9998999834060669,"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/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.9990000128746033,"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":0.9990000128746033,"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/computer-science","display_name":"Computer science","score":0.7744369506835938},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7545078992843628},{"id":"https://openalex.org/keywords/underdetermined-system","display_name":"Underdetermined system","score":0.7284735441207886},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.7046130895614624},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6464251279830933},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.5938268899917603},{"id":"https://openalex.org/keywords/precoding","display_name":"Precoding","score":0.4286070466041565},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.38598835468292236},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.3545522093772888},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.24390757083892822}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7744369506835938},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7545078992843628},{"id":"https://openalex.org/C179690561","wikidata":"https://www.wikidata.org/wiki/Q4316110","display_name":"Underdetermined system","level":2,"score":0.7284735441207886},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.7046130895614624},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6464251279830933},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.5938268899917603},{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.4286070466041565},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.38598835468292236},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3545522093772888},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.24390757083892822},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/lwc.2022.3177429","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lwc.2022.3177429","pdf_url":null,"source":{"id":"https://openalex.org/S2500830676","display_name":"IEEE Wireless Communications Letters","issn_l":"2162-2337","issn":["2162-2337","2162-2345"],"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 Wireless Communications Letters","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1033608059","display_name":null,"funder_award_id":"U1764263","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G3963168574","display_name":null,"funder_award_id":"BK20210335","funder_id":"https://openalex.org/F4320322769","funder_display_name":"Natural Science Foundation of Jiangsu Province"},{"id":"https://openalex.org/G8305406837","display_name":null,"funder_award_id":"2021TQ0092","funder_id":"https://openalex.org/F4320321543","funder_display_name":"China Postdoctoral Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320321543","display_name":"China Postdoctoral Science Foundation","ror":"https://ror.org/0426zh255"},{"id":"https://openalex.org/F4320322769","display_name":"Natural Science Foundation of Jiangsu Province","ror":"https://ror.org/01h0zpd94"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":20,"referenced_works":["https://openalex.org/W1540562499","https://openalex.org/W1938636034","https://openalex.org/W1997834106","https://openalex.org/W2028823365","https://openalex.org/W2092734317","https://openalex.org/W2119667497","https://openalex.org/W2120549790","https://openalex.org/W2593893328","https://openalex.org/W2768388424","https://openalex.org/W2810297269","https://openalex.org/W2962951066","https://openalex.org/W2963116507","https://openalex.org/W2971055251","https://openalex.org/W2974046131","https://openalex.org/W2985994751","https://openalex.org/W3000950478","https://openalex.org/W3091852078","https://openalex.org/W3188358066","https://openalex.org/W3200668305","https://openalex.org/W3205428400"],"related_works":["https://openalex.org/W133751542","https://openalex.org/W2066796569","https://openalex.org/W2997320962","https://openalex.org/W4287906532","https://openalex.org/W3011121006","https://openalex.org/W3141240674","https://openalex.org/W2489379490","https://openalex.org/W2023262826","https://openalex.org/W2141031289","https://openalex.org/W4406029518"],"abstract_inverted_index":{"This":[0],"letter":[1],"focuses":[2],"on":[3,90],"the":[4,11,30,37,43,69,75,83,91],"problem":[5,47],"of":[6,32],"uplink":[7],"channel":[8,39,45,62,77,98],"estimation":[9,46,63,99],"with":[10],"reduced":[12],"fronthaul":[13,92],"overhead":[14,93],"in":[15],"cell-free":[16],"massive":[17],"multiple-input":[18],"multiple-output":[19],"(mMIMO)":[20],"systems.":[21],"First,":[22],"we":[23,35],"propose":[24],"a":[25,87,96],"sub-sampling":[26],"scheme":[27],"to":[28,67],"reduce":[29],"dimension":[31],"fronthaul.":[33],"Then,":[34],"exploit":[36],"inherent":[38],"sparsity":[40],"and":[41,73,94],"model":[42],"underdetermined":[44],"as":[48],"an":[49,56],"off-grid":[50],"sparse":[51,58,76],"signal":[52],"recovery":[53],"problem.":[54],"Finally,":[55],"enhanced":[57],"Bayesian":[59],"learning":[60],"(ESBL)":[61],"algorithm":[64,85],"is":[65],"proposed":[66,84],"refine":[68],"sampled":[70],"grid":[71],"points":[72],"recover":[74],"iteratively.":[78],"Simulation":[79],"results":[80],"demonstrate":[81],"that":[82],"achieves":[86],"significant":[88],"reduction":[89],"offers":[95],"better":[97],"performance.":[100]},"counts_by_year":[{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}