{"id":"https://openalex.org/W4226093320","doi":"https://doi.org/10.1109/twc.2022.3204688","title":"Efficient Channel Estimation for RIS-Aided MIMO Communications With Unitary Approximate Message Passing","display_name":"Efficient Channel Estimation for RIS-Aided MIMO Communications With Unitary Approximate Message Passing","publication_year":2022,"publication_date":"2022-09-08","ids":{"openalex":"https://openalex.org/W4226093320","doi":"https://doi.org/10.1109/twc.2022.3204688"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2022.3204688","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2022.3204688","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/A5019586221","display_name":"Yabo Guo","orcid":"https://orcid.org/0000-0003-3390-8587"},"institutions":[{"id":"https://openalex.org/I38877650","display_name":"Zhengzhou University","ror":"https://ror.org/04ypx8c21","country_code":"CN","type":"education","lineage":["https://openalex.org/I38877650"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yabo Guo","raw_affiliation_strings":["School of Information Engineering, Zhengzhou University, Zhengzhou, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Information Engineering, Zhengzhou University, Zhengzhou, China","institution_ids":["https://openalex.org/I38877650"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5042096663","display_name":"Peng Sun","orcid":"https://orcid.org/0000-0001-6431-3119"},"institutions":[{"id":"https://openalex.org/I38877650","display_name":"Zhengzhou University","ror":"https://ror.org/04ypx8c21","country_code":"CN","type":"education","lineage":["https://openalex.org/I38877650"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Peng Sun","raw_affiliation_strings":["School of Information Engineering, Zhengzhou University, Zhengzhou, China"],"raw_orcid":"https://orcid.org/0000-0001-6431-3119","affiliations":[{"raw_affiliation_string":"School of Information Engineering, Zhengzhou University, Zhengzhou, China","institution_ids":["https://openalex.org/I38877650"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5040292166","display_name":"Zhengdao Yuan","orcid":"https://orcid.org/0000-0002-8715-0284"},"institutions":[{"id":"https://openalex.org/I38877650","display_name":"Zhengzhou University","ror":"https://ror.org/04ypx8c21","country_code":"CN","type":"education","lineage":["https://openalex.org/I38877650"]},{"id":"https://openalex.org/I8679417","display_name":"Hong Kong Metropolitan University","ror":"https://ror.org/0349bsm71","country_code":"HK","type":"education","lineage":["https://openalex.org/I8679417"]}],"countries":["CN","HK"],"is_corresponding":false,"raw_author_name":"Zhengdao Yuan","raw_affiliation_strings":["School of Information Engineering, Zhengzhou University, Zhengzhou, China","Artificial Intelligence Technology Engineering Research Center, Open University of Henan, Zhengzhou, China"],"raw_orcid":"https://orcid.org/0000-0002-8715-0284","affiliations":[{"raw_affiliation_string":"School of Information Engineering, Zhengzhou University, Zhengzhou, China","institution_ids":["https://openalex.org/I38877650"]},{"raw_affiliation_string":"Artificial Intelligence Technology Engineering Research Center, Open University of Henan, Zhengzhou, China","institution_ids":["https://openalex.org/I8679417"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5076730859","display_name":"Chongwen Huang","orcid":"https://orcid.org/0000-0001-8398-8437"},"institutions":[{"id":"https://openalex.org/I4210123185","display_name":"Zhejiang Lab","ror":"https://ror.org/02m2h7991","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210123185"]},{"id":"https://openalex.org/I76130692","display_name":"Zhejiang University","ror":"https://ror.org/00a2xv884","country_code":"CN","type":"education","lineage":["https://openalex.org/I76130692"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chongwen Huang","raw_affiliation_strings":["College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China","International Joint Innovation Center, Zhejiang University, Haining, China","Zhejiang-Singapore Innovation and AI Joint Research Laboratory and the Zhejiang Provincial Key Laboratory of Info. Proc., Commun. & Netw. (IPCAN), Hangzhou, China"],"raw_orcid":"https://orcid.org/0000-0001-8398-8437","affiliations":[{"raw_affiliation_string":"College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China","institution_ids":["https://openalex.org/I76130692"]},{"raw_affiliation_string":"International Joint Innovation Center, Zhejiang University, Haining, China","institution_ids":["https://openalex.org/I76130692"]},{"raw_affiliation_string":"Zhejiang-Singapore Innovation and AI Joint Research Laboratory and the Zhejiang Provincial Key Laboratory of Info. Proc., Commun. & Netw. (IPCAN), Hangzhou, China","institution_ids":["https://openalex.org/I4210123185"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5047844850","display_name":"Qinghua Guo","orcid":"https://orcid.org/0000-0002-5180-7854"},"institutions":[{"id":"https://openalex.org/I204824540","display_name":"University of Wollongong","ror":"https://ror.org/00jtmb277","country_code":"AU","type":"education","lineage":["https://openalex.org/I204824540"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Qinghua Guo","raw_affiliation_strings":["School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW, Australia"],"raw_orcid":"https://orcid.org/0000-0002-5180-7854","affiliations":[{"raw_affiliation_string":"School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW, Australia","institution_ids":["https://openalex.org/I204824540"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101786466","display_name":"Zhongyong Wang","orcid":"https://orcid.org/0000-0002-9217-6200"},"institutions":[{"id":"https://openalex.org/I38877650","display_name":"Zhengzhou University","ror":"https://ror.org/04ypx8c21","country_code":"CN","type":"education","lineage":["https://openalex.org/I38877650"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhongyong Wang","raw_affiliation_strings":["School of Information Engineering, Zhengzhou University, Zhengzhou, China"],"raw_orcid":"https://orcid.org/0000-0002-9217-6200","affiliations":[{"raw_affiliation_string":"School of Information Engineering, Zhengzhou University, Zhengzhou, China","institution_ids":["https://openalex.org/I38877650"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5060020877","display_name":"Chau Yuen","orcid":"https://orcid.org/0000-0002-9307-2120"},"institutions":[{"id":"https://openalex.org/I152815399","display_name":"Singapore University of Technology and Design","ror":"https://ror.org/05j6fvn87","country_code":"SG","type":"education","lineage":["https://openalex.org/I152815399"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Chau Yuen","raw_affiliation_strings":["Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design, Tampines, Singapore"],"raw_orcid":"https://orcid.org/0000-0002-9307-2120","affiliations":[{"raw_affiliation_string":"Engineering Product Development (EPD) Pillar, Singapore University of Technology and Design, Tampines, Singapore","institution_ids":["https://openalex.org/I152815399"]}]}],"institutions":[],"countries_distinct_count":4,"institutions_distinct_count":6,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2195,"currency":"USD","value_usd":2195},"apc_paid":null,"fwci":2.4692,"has_fulltext":false,"cited_by_count":37,"citation_normalized_percentile":{"value":0.89647144,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":97,"max":99},"biblio":{"volume":"22","issue":"2","first_page":"1403","last_page":"1416"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","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/T11458","display_name":"Advanced Wireless Communication Technologies","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/T10069","display_name":"Antenna Design and Analysis","score":0.9865999817848206,"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/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9750999808311462,"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/channel","display_name":"Channel (broadcasting)","score":0.5755087733268738},{"id":"https://openalex.org/keywords/mathematical-notation","display_name":"Mathematical notation","score":0.5192611217498779},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5191820859909058},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.4855225086212158},{"id":"https://openalex.org/keywords/notation","display_name":"Notation","score":0.480495810508728},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.4499014616012573},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4168342053890228},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3787577450275421},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3300590217113495},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.14562469720840454},{"id":"https://openalex.org/keywords/arithmetic","display_name":"Arithmetic","score":0.13952693343162537},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.11162185668945312}],"concepts":[{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.5755087733268738},{"id":"https://openalex.org/C24457124","wikidata":"https://www.wikidata.org/wiki/Q1140046","display_name":"Mathematical notation","level":3,"score":0.5192611217498779},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5191820859909058},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.4855225086212158},{"id":"https://openalex.org/C45357846","wikidata":"https://www.wikidata.org/wiki/Q2001982","display_name":"Notation","level":2,"score":0.480495810508728},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.4499014616012573},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4168342053890228},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3787577450275421},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3300590217113495},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.14562469720840454},{"id":"https://openalex.org/C94375191","wikidata":"https://www.wikidata.org/wiki/Q11205","display_name":"Arithmetic","level":1,"score":0.13952693343162537},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.11162185668945312}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/twc.2022.3204688","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2022.3204688","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:ro.uow.edu.au:test2021-11765","is_oa":false,"landing_page_url":"https://ro.uow.edu.au/test2021/6218","pdf_url":null,"source":{"id":"https://openalex.org/S4306400510","display_name":"Research Online (University of Wollongong)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I204824540","host_organization_name":"University of Wollongong","host_organization_lineage":["https://openalex.org/I204824540"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Scopus Harvesting Series","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","score":0.9200000166893005,"id":"https://metadata.un.org/sdg/7"}],"awards":[{"id":"https://openalex.org/G1843427741","display_name":null,"funder_award_id":"222102210184","funder_id":"https://openalex.org/F4320336593","funder_display_name":"Henan Provincial Science and Technology Research Project"},{"id":"https://openalex.org/G2029255954","display_name":null,"funder_award_id":"212102210566","funder_id":"https://openalex.org/F4320336593","funder_display_name":"Henan Provincial Science and Technology Research Project"},{"id":"https://openalex.org/G2569668766","display_name":null,"funder_award_id":"2021.YFA1000500","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"},{"id":"https://openalex.org/G3157152314","display_name":null,"funder_award_id":"212102210556","funder_id":"https://openalex.org/F4320336593","funder_display_name":"Henan Provincial Science and Technology Research Project"},{"id":"https://openalex.org/G4799385007","display_name":null,"funder_award_id":"61901417","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G494409627","display_name":null,"funder_award_id":"62101492","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G8229977993","display_name":null,"funder_award_id":"212102210173","funder_id":"https://openalex.org/F4320336593","funder_display_name":"Henan Provincial Science and Technology Research Project"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320335777","display_name":"National Key Research and Development Program of China","ror":null},{"id":"https://openalex.org/F4320336593","display_name":"Henan Provincial Science and Technology Research Project","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":43,"referenced_works":["https://openalex.org/W2091990110","https://openalex.org/W2138996475","https://openalex.org/W2808128011","https://openalex.org/W2937693915","https://openalex.org/W2950077417","https://openalex.org/W2963206527","https://openalex.org/W2970297297","https://openalex.org/W2971912794","https://openalex.org/W2981792785","https://openalex.org/W2990747873","https://openalex.org/W2994742101","https://openalex.org/W3004201425","https://openalex.org/W3005347223","https://openalex.org/W3009918410","https://openalex.org/W3010695123","https://openalex.org/W3016347440","https://openalex.org/W3017311957","https://openalex.org/W3021225717","https://openalex.org/W3021564798","https://openalex.org/W3022916026","https://openalex.org/W3031056847","https://openalex.org/W3035217884","https://openalex.org/W3039402952","https://openalex.org/W3040349383","https://openalex.org/W3040918692","https://openalex.org/W3041653465","https://openalex.org/W3088767314","https://openalex.org/W3094357447","https://openalex.org/W3103026331","https://openalex.org/W3122864568","https://openalex.org/W3134746776","https://openalex.org/W3154003282","https://openalex.org/W3158743991","https://openalex.org/W3185159210","https://openalex.org/W3185482389","https://openalex.org/W3202416460","https://openalex.org/W3203940756","https://openalex.org/W3205119076","https://openalex.org/W3214334574","https://openalex.org/W4225832298","https://openalex.org/W4285142136","https://openalex.org/W6637759562","https://openalex.org/W6789486952"],"related_works":["https://openalex.org/W2393607213","https://openalex.org/W2495832077","https://openalex.org/W1968256718","https://openalex.org/W2624682093","https://openalex.org/W98357545","https://openalex.org/W2278797713","https://openalex.org/W4249487612","https://openalex.org/W977407476","https://openalex.org/W3167735904","https://openalex.org/W4280602899"],"abstract_inverted_index":{"Reconfigurable":[0],"intelligent":[1],"surface":[2],"(RIS)":[3],"is":[4,35,39],"very":[5,40],"promising":[6],"for":[7,84],"wireless":[8],"networks":[9],"to":[10,81,87,151,164,196],"achieve":[11,88],"high":[12],"energy":[13],"efficiency,":[14],"extended":[15],"coverage,":[16],"improved":[17],"capacity,":[18],"massive":[19],"connectivity,":[20],"etc.":[21],"To":[22],"unleash":[23],"the":[24,49,60,66,74,78,101,106,123,147,152,158,161,179],"full":[25],"potentials":[26],"of":[27,62,99,154,160,191],"RIS-aided":[28,43,167],"communications,":[29,48],"acquiring":[30],"accurate":[31],"channel":[32,51,134],"state":[33],"information":[34],"crucial,":[36],"which":[37,91],"however":[38],"challenging.":[41],"For":[42],"multiple-input":[44],"and":[45,118,203],"multiple-output":[46],"(MIMO)":[47],"existing":[50],"estimation":[52],"methods":[53],"have":[54,70,143],"computational":[55],"complexity":[56,138],"growing":[57],"rapidly":[58],"with":[59,170],"number":[61,190],"RIS":[63],"units$N$(e.g.,":[64],"in":[65,105,199],"order":[67],"of$N^{2}$or$N^{3}$)":[68],"and/or":[69,186],"special":[71,144],"requirements":[72,145],"on":[73,146],"matrices":[75,79],"involved":[76],"(e.g.,":[77],"need":[80],"be":[82],"sparse":[83],"algorithm":[85,163],"convergence":[86],"satisfactory":[89],"performance),":[90],"hinder":[92],"their":[93],"applications.":[94],"In":[95],"this":[96],"work,":[97],"instead":[98],"using":[100],"conventional":[102],"signal":[103,112],"model":[104,113],"literature,":[107],"we":[108,129],"derive":[109],"a":[110,131,165,171],"new":[111],"obtained":[114],"through":[115],"proper":[116],"vectorization":[117],"reduction":[119],"operations.":[120],"Then,":[121],"leveraging":[122],"unitary":[124],"approximate":[125],"message":[126],"passing":[127],"(UAMP),":[128],"develop":[130],"more":[132],"efficient":[133],"estimator":[135,181],"that":[136,178],"has":[137],"linear":[139],"with$N$and":[140],"does":[141],"not":[142],"relevant":[148],"matrices,":[149],"thanks":[150],"robustness":[153],"UAMP.":[155],"These":[156],"facilitate":[157],"applications":[159],"proposed":[162,180],"general":[166],"MIMO":[168],"system":[169],"larger$N$.":[172],"Moreover,":[173],"extensive":[174],"numerical":[175],"results":[176],"show":[177],"delivers":[182],"much":[183],"better":[184],"performance":[185],"requires":[187],"significantly":[188],"less":[189],"training":[192,201],"symbols,":[193],"thereby":[194],"leading":[195],"notable":[197],"reductions":[198],"both":[200],"overhead":[202],"latency.":[204]},"counts_by_year":[{"year":2026,"cited_by_count":4},{"year":2025,"cited_by_count":10},{"year":2024,"cited_by_count":12},{"year":2023,"cited_by_count":6},{"year":2022,"cited_by_count":5}],"updated_date":"2026-08-28T12:50:07.497085","created_date":"2025-10-10T00:00:00"}