{"id":"https://openalex.org/W3174606382","doi":"https://doi.org/10.1109/tvt.2021.3091020","title":"Pilot Assignment for Joint Uplink-Downlink Spectral Efficiency Enhancement in Massive MIMO Systems With Spatial Correlation","display_name":"Pilot Assignment for Joint Uplink-Downlink Spectral Efficiency Enhancement in Massive MIMO Systems With Spatial Correlation","publication_year":2021,"publication_date":"2021-06-22","ids":{"openalex":"https://openalex.org/W3174606382","doi":"https://doi.org/10.1109/tvt.2021.3091020","mag":"3174606382"},"language":"en","primary_location":{"id":"doi:10.1109/tvt.2021.3091020","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tvt.2021.3091020","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":"preprint","indexed_in":["arxiv","crossref","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2106.15817","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5050879879","display_name":"Ti\u1ebfn Hoa Nguy\u1ec5n","orcid":"https://orcid.org/0000-0003-4743-5012"},"institutions":[{"id":"https://openalex.org/I94518387","display_name":"Hanoi University of Science and Technology","ror":"https://ror.org/04nyv3z04","country_code":"VN","type":"education","lineage":["https://openalex.org/I94518387"]}],"countries":["VN"],"is_corresponding":true,"raw_author_name":"Tien Hoa Nguyen","raw_affiliation_strings":["School of Electronics and Telecommunications (SET), Hanoi University of Science and Technology, Hanoi, Vietnam","Hanoi University of Science and Technology#TAB#"],"raw_orcid":"https://orcid.org/0000-0003-4743-5012","affiliations":[{"raw_affiliation_string":"School of Electronics and Telecommunications (SET), Hanoi University of Science and Technology, Hanoi, Vietnam","institution_ids":["https://openalex.org/I94518387"]},{"raw_affiliation_string":"Hanoi University of Science and Technology#TAB#","institution_ids":["https://openalex.org/I94518387"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018288108","display_name":"Trinh Van Chien","orcid":"https://orcid.org/0000-0002-5675-8414"},"institutions":[{"id":"https://openalex.org/I94518387","display_name":"Hanoi University of Science and Technology","ror":"https://ror.org/04nyv3z04","country_code":"VN","type":"education","lineage":["https://openalex.org/I94518387"]}],"countries":["VN"],"is_corresponding":false,"raw_author_name":"Trinh Van Chien","raw_affiliation_strings":["School of Information and Communication Technology (SoICT), Hanoi University of Science and Technology (HUST), Hanoi, Vietnam"],"raw_orcid":"https://orcid.org/0000-0002-5675-8414","affiliations":[{"raw_affiliation_string":"School of Information and Communication Technology (SoICT), Hanoi University of Science and Technology (HUST), Hanoi, Vietnam","institution_ids":["https://openalex.org/I94518387"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5052919611","display_name":"Hien Quoc Ngo","orcid":"https://orcid.org/0000-0002-3367-2220"},"institutions":[{"id":"https://openalex.org/I126231945","display_name":"Queen's University Belfast","ror":"https://ror.org/00hswnk62","country_code":"GB","type":"education","lineage":["https://openalex.org/I126231945"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Hien Quoc Ngo","raw_affiliation_strings":["Institute of Electronics, Communications and Information Technology (ECIT), Queen&#x0027;s University Belfast, Belfast, U.K","Queen\u2019s University , Belfast"],"raw_orcid":"https://orcid.org/0000-0002-3367-2220","affiliations":[{"raw_affiliation_string":"Institute of Electronics, Communications and Information Technology (ECIT), Queen&#x0027;s University Belfast, Belfast, U.K","institution_ids":["https://openalex.org/I126231945"]},{"raw_affiliation_string":"Queen\u2019s University , Belfast","institution_ids":["https://openalex.org/I126231945"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034704196","display_name":"Xuan Nam Tran","orcid":"https://orcid.org/0000-0001-8530-9354"},"institutions":[{"id":"https://openalex.org/I131359167","display_name":"Le Quy Don Technical University","ror":"https://ror.org/04wgyjv21","country_code":"VN","type":"education","lineage":["https://openalex.org/I131359167"]}],"countries":["VN"],"is_corresponding":false,"raw_author_name":"Xuan Nam Tran","raw_affiliation_strings":["Advanced Wireless Communications Group, Le Quy Don Technical University, Hanoi, Vietnam"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Advanced Wireless Communications Group, Le Quy Don Technical University, Hanoi, Vietnam","institution_ids":["https://openalex.org/I131359167"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5062293532","display_name":"Emil Bj\u00f6rnson","orcid":"https://orcid.org/0000-0002-5954-434X"},"institutions":[{"id":"https://openalex.org/I102134673","display_name":"Link\u00f6ping University","ror":"https://ror.org/05ynxx418","country_code":"SE","type":"education","lineage":["https://openalex.org/I102134673"]},{"id":"https://openalex.org/I86987016","display_name":"KTH Royal Institute of Technology","ror":"https://ror.org/026vcq606","country_code":"SE","type":"education","lineage":["https://openalex.org/I86987016"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Emil Bj\u00f6rnson","raw_affiliation_strings":["Department of Electrical Engineering, Link&#x00F6;ping University, Link&#x00F6;ping, Sweden","Royal Institute of Technology"],"raw_orcid":"https://orcid.org/0000-0002-5954-434X","affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Link&#x00F6;ping University, Link&#x00F6;ping, Sweden","institution_ids":["https://openalex.org/I102134673"]},{"raw_affiliation_string":"Royal Institute of Technology","institution_ids":["https://openalex.org/I86987016"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5050879879"],"corresponding_institution_ids":["https://openalex.org/I94518387"],"apc_list":null,"apc_paid":null,"fwci":0.1017,"has_fulltext":true,"cited_by_count":1,"citation_normalized_percentile":{"value":0.42282597,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"70","issue":"8","first_page":"8292","last_page":"8297"},"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/T11409","display_name":"Advanced Wireless Network Optimization","score":0.9995999932289124,"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/telecommunications-link","display_name":"Telecommunications link","score":0.9400054216384888},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6248921155929565},{"id":"https://openalex.org/keywords/rayleigh-fading","display_name":"Rayleigh fading","score":0.5778197050094604},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.5662089586257935},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.5629995465278625},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5141665935516357},{"id":"https://openalex.org/keywords/heuristic","display_name":"Heuristic","score":0.5044304132461548},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.48143690824508667},{"id":"https://openalex.org/keywords/fading","display_name":"Fading","score":0.44160833954811096},{"id":"https://openalex.org/keywords/optimization-problem","display_name":"Optimization problem","score":0.42931675910949707},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.4171972870826721},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.31450456380844116},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.18296951055526733},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.16440075635910034},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.14459404349327087},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.12640196084976196}],"concepts":[{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.9400054216384888},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6248921155929565},{"id":"https://openalex.org/C56985126","wikidata":"https://www.wikidata.org/wiki/Q854039","display_name":"Rayleigh fading","level":4,"score":0.5778197050094604},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.5662089586257935},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.5629995465278625},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5141665935516357},{"id":"https://openalex.org/C173801870","wikidata":"https://www.wikidata.org/wiki/Q201413","display_name":"Heuristic","level":2,"score":0.5044304132461548},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.48143690824508667},{"id":"https://openalex.org/C81978471","wikidata":"https://www.wikidata.org/wiki/Q1196572","display_name":"Fading","level":3,"score":0.44160833954811096},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.42931675910949707},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.4171972870826721},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.31450456380844116},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.18296951055526733},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.16440075635910034},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.14459404349327087},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.12640196084976196}],"mesh":[],"locations_count":5,"locations":[{"id":"doi:10.1109/tvt.2021.3091020","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tvt.2021.3091020","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"},{"id":"pmh:oai:arXiv.org:2106.15817","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2106.15817","pdf_url":"https://arxiv.org/pdf/2106.15817","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"pmh:oai:pure.qub.ac.uk/portal:openaire/e93cb7dd-fa33-4cea-8294-a3952e90c3cd","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/e93cb7dd-fa33-4cea-8294-a3952e90c3cd","pdf_url":"https://pureadmin.qub.ac.uk/ws/files/244829641/IEEE_TVT_Accepted.pdf","source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"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":"Nguyen, T H, Trinh, V C, Ngo, H-Q, Tran, X N & Bj\u00f6rnson, E 2021, 'Pilot assignment for joint uplink-downlink spectral efficiency enhancement in massive MIMO systems with spatial correlation', IEEE Transactions on Vehicular Technology, vol. 70, no. 8, pp. 8292 - 8297. https://doi.org/10.1109/TVT.2021.3091020","raw_type":"info:eu-repo/semantics/publishedVersion"},{"id":"mag:3174606382","is_oa":true,"landing_page_url":"https://arxiv.org/pdf/2106.15817v1","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"arXiv (Cornell University)","raw_type":null},{"id":"doi:10.48550/arxiv.2106.15817","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2106.15817","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2106.15817","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2106.15817","pdf_url":"https://arxiv.org/pdf/2106.15817","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[{"score":0.5099999904632568,"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy"}],"awards":[{"id":"https://openalex.org/G2233520809","display_name":null,"funder_award_id":"102.01-2019.07","funder_id":"https://openalex.org/F4320309617","funder_display_name":"National Foundation for Science and Technology Development"}],"funders":[{"id":"https://openalex.org/F4320309617","display_name":"National Foundation for Science and Technology Development","ror":"https://ror.org/04rw64z44"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":17,"referenced_works":["https://openalex.org/W1518945650","https://openalex.org/W1986586714","https://openalex.org/W1995042902","https://openalex.org/W2090195299","https://openalex.org/W2110323470","https://openalex.org/W2142015064","https://openalex.org/W2296319761","https://openalex.org/W2761940275","https://openalex.org/W2770606349","https://openalex.org/W2963151934","https://openalex.org/W2963451778","https://openalex.org/W3083228202","https://openalex.org/W3098350033","https://openalex.org/W3098980465","https://openalex.org/W4250589301","https://openalex.org/W6633070339","https://openalex.org/W6745001297"],"related_works":["https://openalex.org/W2954430807","https://openalex.org/W3132530467","https://openalex.org/W2963545705","https://openalex.org/W2792698888","https://openalex.org/W2885833733","https://openalex.org/W2898783425","https://openalex.org/W2981307532","https://openalex.org/W3014010741","https://openalex.org/W2108081384","https://openalex.org/W2187497965","https://openalex.org/W2949566164","https://openalex.org/W3184387770","https://openalex.org/W2786480654","https://openalex.org/W2011941767","https://openalex.org/W2994716383","https://openalex.org/W2156626165","https://openalex.org/W2293606211","https://openalex.org/W1982260864","https://openalex.org/W1602873890","https://openalex.org/W3009638506"],"abstract_inverted_index":{"This":[0,73],"paper":[1],"proposes":[2],"a":[3,33,83,92,115],"flexible":[4],"pilot":[5,70,85,94],"assignment":[6,71,86],"method":[7],"to":[8,65,90,114],"jointly":[9],"optimize":[10],"the":[11,37,54,59,66,98,109,123],"uplink":[12,60],"and":[13,61,69,97],"downlink":[14,62],"data":[15,99],"transmission":[16],"in":[17,125],"multi-cell":[18],"Massive":[19],"multiple":[20,22],"input":[21],"output":[23],"(MIMO)":[24],"systems":[25],"with":[26,43],"correlated":[27],"Rayleigh":[28],"fading":[29],"channels.":[30],"By":[31],"utilizing":[32],"closed-form":[34],"expression":[35],"of":[36,58],"ergodic":[38],"spectral":[39],"efficiency":[40],"(SE)":[41],"achieved":[42],"maximum":[44],"ratio":[45],"processing,":[46],"we":[47],"formulate":[48],"an":[49],"optimization":[50,75],"problem":[51,76],"for":[52],"maximizing":[53],"minimum":[55,117],"weighted":[56],"sum":[57,118],"SEs":[63],"subject":[64],"transmit":[67],"powers":[68],"sets.":[72],"combinatiorial":[74],"is":[77,87,102],"solved":[78],"by":[79],"two":[80],"sequential":[81],"algorithms:":[82],"heuristic":[84],"first":[88],"proposed":[89,110],"obtain":[91],"good":[93],"reuse":[95],"set":[96],"power":[100],"control":[101],"then":[103],"implemented.":[104],"Numerical":[105],"results":[106],"manifest":[107],"that":[108],"algorithm":[111],"converges":[112],"fast":[113],"better":[116],"SE":[119],"per":[120],"user":[121],"than":[122],"algorithms":[124],"previous":[126],"works.":[127]},"counts_by_year":[{"year":2022,"cited_by_count":1}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}
