{"id":"https://openalex.org/W3156089913","doi":"https://doi.org/10.1109/tvt.2021.3072658","title":"Two-Timescale Uplink Channel Estimation for Dual-Hop MIMO Relay Multi-User Systems","display_name":"Two-Timescale Uplink Channel Estimation for Dual-Hop MIMO Relay Multi-User Systems","publication_year":2021,"publication_date":"2021-04-14","ids":{"openalex":"https://openalex.org/W3156089913","doi":"https://doi.org/10.1109/tvt.2021.3072658","mag":"3156089913"},"language":"en","primary_location":{"id":"doi:10.1109/tvt.2021.3072658","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tvt.2021.3072658","pdf_url":null,"source":{"id":"https://openalex.org/S10936095","display_name":"IEEE Transactions on Vehicular Technology","issn_l":"0018-9545","issn":["0018-9545","1939-9359"],"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 Vehicular Technology","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/A5100404698","display_name":"Zhiqiang Wang","orcid":"https://orcid.org/0000-0001-6398-5298"},"institutions":[{"id":"https://openalex.org/I150229711","display_name":"University of Electronic Science and Technology of China","ror":"https://ror.org/04qr3zq92","country_code":"CN","type":"education","lineage":["https://openalex.org/I150229711"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Zhiqiang Wang","raw_affiliation_strings":["National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China"],"raw_orcid":"https://orcid.org/0000-0001-6398-5298","affiliations":[{"raw_affiliation_string":"National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China","institution_ids":["https://openalex.org/I150229711"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034376590","display_name":"Yunlong Cai","orcid":"https://orcid.org/0000-0001-9418-1700"},"institutions":[{"id":"https://openalex.org/I21193070","display_name":"Beijing Jiaotong University","ror":"https://ror.org/01yj56c84","country_code":"CN","type":"education","lineage":["https://openalex.org/I21193070"]},{"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":"Yunlong Cai","raw_affiliation_strings":["College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China","State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China"],"raw_orcid":"https://orcid.org/0000-0001-9418-1700","affiliations":[{"raw_affiliation_string":"College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China","institution_ids":["https://openalex.org/I76130692"]},{"raw_affiliation_string":"State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China","institution_ids":["https://openalex.org/I21193070"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100340369","display_name":"An Liu","orcid":"https://orcid.org/0000-0002-3943-5234"},"institutions":[{"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":"An Liu","raw_affiliation_strings":["College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China"],"raw_orcid":"https://orcid.org/0000-0002-3943-5234","affiliations":[{"raw_affiliation_string":"College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China","institution_ids":["https://openalex.org/I76130692"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004042409","display_name":"Jun Wang","orcid":"https://orcid.org/0000-0003-4422-1705"},"institutions":[{"id":"https://openalex.org/I150229711","display_name":"University of Electronic Science and Technology of China","ror":"https://ror.org/04qr3zq92","country_code":"CN","type":"education","lineage":["https://openalex.org/I150229711"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jun Wang","raw_affiliation_strings":["National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China"],"raw_orcid":"https://orcid.org/0000-0003-4422-1705","affiliations":[{"raw_affiliation_string":"National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China","institution_ids":["https://openalex.org/I150229711"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5028410550","display_name":"Guangrong Yue","orcid":"https://orcid.org/0000-0001-7937-124X"},"institutions":[{"id":"https://openalex.org/I150229711","display_name":"University of Electronic Science and Technology of China","ror":"https://ror.org/04qr3zq92","country_code":"CN","type":"education","lineage":["https://openalex.org/I150229711"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Guangrong Yue","raw_affiliation_strings":["National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China"],"raw_orcid":"https://orcid.org/0000-0001-7937-124X","affiliations":[{"raw_affiliation_string":"National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China","institution_ids":["https://openalex.org/I150229711"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.5195,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.66767128,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"70","issue":"5","first_page":"4724","last_page":"4739"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":1.0,"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/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/T12791","display_name":"Full-Duplex Wireless Communications","score":0.9980999827384949,"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":0.8121077418327332},{"id":"https://openalex.org/keywords/relay","display_name":"Relay","score":0.7398108839988708},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7224973440170288},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6577492952346802},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.6496235728263855},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5915045738220215},{"id":"https://openalex.org/keywords/optimization-problem","display_name":"Optimization problem","score":0.4467304050922394},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.442116379737854},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.354129821062088},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.3314245939254761},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.15805667638778687}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.8121077418327332},{"id":"https://openalex.org/C2778156585","wikidata":"https://www.wikidata.org/wiki/Q174053","display_name":"Relay","level":3,"score":0.7398108839988708},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7224973440170288},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6577492952346802},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.6496235728263855},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5915045738220215},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.4467304050922394},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.442116379737854},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.354129821062088},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.3314245939254761},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.15805667638778687},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tvt.2021.3072658","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tvt.2021.3072658","pdf_url":null,"source":{"id":"https://openalex.org/S10936095","display_name":"IEEE Transactions on Vehicular Technology","issn_l":"0018-9545","issn":["0018-9545","1939-9359"],"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 Vehicular Technology","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.5}],"awards":[{"id":"https://openalex.org/G2937299307","display_name":"\u9762\u5411\u9ad8\u6548\u80fd\u6beb\u7c73\u6ce2\u901a\u4fe1\u7cfb\u7edf\u7684\u591a\u5c3a\u5ea6\u6df7\u5408\u6536\u53d1\u673a\u65b9\u6cd5\u7814\u7a76","funder_award_id":"61971376","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G4222582882","display_name":null,"funder_award_id":"91938202","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G6025261752","display_name":null,"funder_award_id":"RCS2020k010","funder_id":"https://openalex.org/F4320323067","funder_display_name":"State Key Laboratory of Rail Traffic Control and Safety"},{"id":"https://openalex.org/G6110245451","display_name":"\u786c\u4ef6\u6027\u80fd\u53d7\u9650\u4e0b\u5ba4\u5916\u6beb\u7c73\u6ce2\u5927\u89c4\u6a21MIMO\u5173\u952e\u6280\u672f\u7814\u7a76","funder_award_id":"61831004","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G710882353","display_name":null,"funder_award_id":"62071416","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G8934654228","display_name":null,"funder_award_id":"2020YFB1805001","funder_id":"https://openalex.org/F4320336026","funder_display_name":"National Key Research and Development Program of China Stem Cell and Translational Research"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320323066","display_name":"Beijing Jiaotong University","ror":"https://ror.org/01yj56c84"},{"id":"https://openalex.org/F4320323067","display_name":"State Key Laboratory of Rail Traffic Control and Safety","ror":"https://ror.org/01yj56c84"},{"id":"https://openalex.org/F4320336026","display_name":"National Key Research and Development Program of China Stem Cell and Translational Research","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":49,"referenced_works":["https://openalex.org/W79131877","https://openalex.org/W1518945650","https://openalex.org/W1527714054","https://openalex.org/W1572522949","https://openalex.org/W1832379062","https://openalex.org/W1964590153","https://openalex.org/W1975629014","https://openalex.org/W1997834106","https://openalex.org/W2006599533","https://openalex.org/W2025123030","https://openalex.org/W2034771294","https://openalex.org/W2064517928","https://openalex.org/W2065312435","https://openalex.org/W2076449723","https://openalex.org/W2076509020","https://openalex.org/W2076853942","https://openalex.org/W2078048489","https://openalex.org/W2098969228","https://openalex.org/W2111613063","https://openalex.org/W2120840652","https://openalex.org/W2141025915","https://openalex.org/W2142141276","https://openalex.org/W2144866696","https://openalex.org/W2145060291","https://openalex.org/W2171159551","https://openalex.org/W2258153734","https://openalex.org/W2322575721","https://openalex.org/W2460536129","https://openalex.org/W2495446215","https://openalex.org/W2595217716","https://openalex.org/W2761320959","https://openalex.org/W2769303921","https://openalex.org/W2784991221","https://openalex.org/W2885689168","https://openalex.org/W2893303065","https://openalex.org/W2905359157","https://openalex.org/W2910875456","https://openalex.org/W2921488026","https://openalex.org/W2950790100","https://openalex.org/W2955126943","https://openalex.org/W2962819920","https://openalex.org/W2963842818","https://openalex.org/W2992189719","https://openalex.org/W3000617136","https://openalex.org/W3011020899","https://openalex.org/W3027978347","https://openalex.org/W3036725690","https://openalex.org/W4244633107","https://openalex.org/W6603171186"],"related_works":["https://openalex.org/W2062000094","https://openalex.org/W2103870217","https://openalex.org/W2135320451","https://openalex.org/W2152999056","https://openalex.org/W4291722335","https://openalex.org/W2952996586","https://openalex.org/W4298449752","https://openalex.org/W3190774574","https://openalex.org/W2014447384","https://openalex.org/W4225896672"],"abstract_inverted_index":{"Multiple-input":[0],"multiple-output":[1],"(MIMO)":[2],"relay":[3,37,49],"systems":[4],"have":[5],"received":[6],"great":[7],"attention":[8],"for":[9,21],"the":[10,27,31,41,46,52,56,65,77,84,100,106,128,135,149,161,164],"development":[11],"of":[12,79,137,163],"future":[13],"wireless":[14],"networks,":[15],"since":[16],"they":[17],"can":[18],"be":[19],"invoked":[20],"improving":[22],"system":[23],"capacity":[24],"and":[25,36,40],"extending":[26],"coverage":[28],"area.":[29],"Considering":[30],"fixed":[32],"base":[33],"station":[34,38],"(BS)":[35],"(RS)":[39],"highly":[42],"mobile":[43],"users":[44],"(UEs),":[45],"dual-hop":[47],"MIMO":[48],"channel":[50,58,67,90,103,108,167],"possesses":[51],"two-timescale":[53,89,107,166],"characteristics,":[54],"i.e.,":[55],"UEs-RS":[57],"varies":[59,68],"in":[60,69],"a":[61,70,140],"short-timescale":[62],"manner":[63],"whereas":[64],"RS-BS":[66],"long-timescale":[71],"manner.":[72],"In":[73],"order":[74],"to":[75,126,133,159],"acquire":[76],"knowledge":[78],"all":[80],"individual":[81],"channels":[82],"at":[83],"BS":[85],"directly,":[86],"we":[87,122],"propose":[88],"estimation":[91,109,168],"algorithms":[92],"with":[93],"one-stage":[94],"training":[95],"(OST)":[96],"scheme":[97],"based":[98,147],"on":[99,148],"above":[101],"time-varying":[102],"characteristics.":[104],"Specifically,":[105],"problem":[110],"is":[111,144],"firstly":[112],"formulated":[113],"as":[114],"an":[115],"approximate":[116],"maximum":[117],"likelihood":[118],"(AML)":[119],"problem.":[120,131],"Then,":[121],"design":[123],"batch":[124,138],"algorithm":[125,143],"solve":[127],"resultant":[129],"optimization":[130,152],"Moreover,":[132],"overcome":[134],"drawbacks":[136],"algorithm,":[139],"low-complexity":[141],"online":[142],"also":[145],"proposed":[146,165],"two-stage":[150],"stochastic":[151],"framework.":[153],"Finally,":[154],"simulation":[155],"results":[156],"are":[157],"provided":[158],"verify":[160],"effectiveness":[162],"algorithms.":[169]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1}],"updated_date":"2026-07-17T09:13:05.818461","created_date":"2025-10-10T00:00:00"}
