{"id":"https://openalex.org/W2963788079","doi":"https://doi.org/10.1109/ict.2018.8464856","title":"Enhancing massive MIMO: A new approach for Uplink training based on heterogeneous coherence times","display_name":"Enhancing massive MIMO: A new approach for Uplink training based on heterogeneous coherence times","publication_year":2018,"publication_date":"2018-06-01","ids":{"openalex":"https://openalex.org/W2963788079","doi":"https://doi.org/10.1109/ict.2018.8464856","mag":"2963788079"},"language":"en","primary_location":{"id":"doi:10.1109/ict.2018.8464856","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ict.2018.8464856","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2018 25th International Conference on Telecommunications (ICT)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5027812516","display_name":"Salah Eddine Hajri","orcid":"https://orcid.org/0000-0002-0531-7141"},"institutions":[{"id":"https://openalex.org/I1294671590","display_name":"Centre National de la Recherche Scientifique","ror":"https://ror.org/02feahw73","country_code":"FR","type":"government","lineage":["https://openalex.org/I1294671590"]},{"id":"https://openalex.org/I4210097418","display_name":"Laboratoire des signaux et syst\u00e8mes","ror":"https://ror.org/00skw9v43","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I277688954","https://openalex.org/I277688954","https://openalex.org/I4210097418","https://openalex.org/I4210107720"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Salah Eddine Hajri","raw_affiliation_strings":["TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","institution_ids":["https://openalex.org/I1294671590","https://openalex.org/I4210097418"]},{"raw_affiliation_string":"L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)","institution_ids":["https://openalex.org/I4210097418"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5002000523","display_name":"Mohamad Assaad","orcid":"https://orcid.org/0000-0003-3909-6241"},"institutions":[{"id":"https://openalex.org/I1294671590","display_name":"Centre National de la Recherche Scientifique","ror":"https://ror.org/02feahw73","country_code":"FR","type":"government","lineage":["https://openalex.org/I1294671590"]},{"id":"https://openalex.org/I4210097418","display_name":"Laboratoire des signaux et syst\u00e8mes","ror":"https://ror.org/00skw9v43","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I277688954","https://openalex.org/I277688954","https://openalex.org/I4210097418","https://openalex.org/I4210107720"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Mohamad Assaad","raw_affiliation_strings":["TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","institution_ids":["https://openalex.org/I1294671590","https://openalex.org/I4210097418"]},{"raw_affiliation_string":"L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)","institution_ids":["https://openalex.org/I4210097418"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5111391282","display_name":"Maialen Larra\u00f1aga","orcid":null},"institutions":[{"id":"https://openalex.org/I1294671590","display_name":"Centre National de la Recherche Scientifique","ror":"https://ror.org/02feahw73","country_code":"FR","type":"government","lineage":["https://openalex.org/I1294671590"]},{"id":"https://openalex.org/I4210097418","display_name":"Laboratoire des signaux et syst\u00e8mes","ror":"https://ror.org/00skw9v43","country_code":"FR","type":"facility","lineage":["https://openalex.org/I1294671590","https://openalex.org/I277688954","https://openalex.org/I277688954","https://openalex.org/I4210097418","https://openalex.org/I4210107720"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Maialen Larranaga","raw_affiliation_strings":["TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"TCL Chair on 5G, Laboratoire des Signaux et Systemes (L2S, CNRS), Gif-sur-Yvette, France","institution_ids":["https://openalex.org/I1294671590","https://openalex.org/I4210097418"]},{"raw_affiliation_string":"L2S - Laboratoire des signaux et syst\u00e8mes (Plateau de Moulon 3 rue Joliot Curie 91192 GIF SUR YVETTE CEDEX - France)","institution_ids":["https://openalex.org/I4210097418"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.7793,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.71143271,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"361","last_page":"366"},"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/T11392","display_name":"Energy Harvesting in Wireless Networks","score":0.9998000264167786,"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":0.9998000264167786,"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":0.8025834560394287},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.7598690986633301},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7530508041381836},{"id":"https://openalex.org/keywords/coherence-time","display_name":"Coherence time","score":0.7209455370903015},{"id":"https://openalex.org/keywords/coherence","display_name":"Coherence (philosophical gambling strategy)","score":0.5835033059120178},{"id":"https://openalex.org/keywords/scheduling","display_name":"Scheduling (production processes)","score":0.5435308218002319},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.5395954847335815},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.4571206271648407},{"id":"https://openalex.org/keywords/multi-user-mimo","display_name":"Multi-user MIMO","score":0.4452807605266571},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.41092848777770996},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.40247032046318054},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.4012448489665985},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.3908170461654663},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.23904547095298767},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.15141788125038147},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.06871211528778076}],"concepts":[{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.8025834560394287},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7598690986633301},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7530508041381836},{"id":"https://openalex.org/C47091857","wikidata":"https://www.wikidata.org/wiki/Q4118612","display_name":"Coherence time","level":3,"score":0.7209455370903015},{"id":"https://openalex.org/C2781181686","wikidata":"https://www.wikidata.org/wiki/Q4226068","display_name":"Coherence (philosophical gambling strategy)","level":2,"score":0.5835033059120178},{"id":"https://openalex.org/C206729178","wikidata":"https://www.wikidata.org/wiki/Q2271896","display_name":"Scheduling (production processes)","level":2,"score":0.5435308218002319},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.5395954847335815},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.4571206271648407},{"id":"https://openalex.org/C91330434","wikidata":"https://www.wikidata.org/wiki/Q738298","display_name":"Multi-user MIMO","level":4,"score":0.4452807605266571},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.41092848777770996},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.40247032046318054},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.4012448489665985},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.3908170461654663},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.23904547095298767},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.15141788125038147},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.06871211528778076},{"id":"https://openalex.org/C21547014","wikidata":"https://www.wikidata.org/wiki/Q1423657","display_name":"Operations management","level":1,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/ict.2018.8464856","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ict.2018.8464856","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2018 25th International Conference on Telecommunications (ICT)","raw_type":"proceedings-article"},{"id":"pmh:oai:HAL:hal-03106675v1","is_oa":false,"landing_page_url":"https://hal.science/hal-03106675","pdf_url":null,"source":{"id":"https://openalex.org/S4306402512","display_name":"HAL (Le Centre pour la Communication Scientifique Directe)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1294671590","host_organization_name":"Centre National de la Recherche Scientifique","host_organization_lineage":["https://openalex.org/I1294671590"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"25th International Conference on Telecommunication (ICT 2018), Jun 2018, St. Malo, France. pp.361-366, &#x27E8;10.1109/ICT.2018.8464856&#x27E9;","raw_type":"info:eu-repo/semantics/conferenceObject"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","score":0.9100000262260437,"id":"https://metadata.un.org/sdg/7"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":23,"referenced_works":["https://openalex.org/W1503396090","https://openalex.org/W1536628706","https://openalex.org/W1596939795","https://openalex.org/W1680189815","https://openalex.org/W1984844660","https://openalex.org/W1987076955","https://openalex.org/W2014447384","https://openalex.org/W2053381548","https://openalex.org/W2105177639","https://openalex.org/W2118780683","https://openalex.org/W2147601077","https://openalex.org/W2166627902","https://openalex.org/W2478503558","https://openalex.org/W2549023315","https://openalex.org/W2620643037","https://openalex.org/W2963788079","https://openalex.org/W3141561286","https://openalex.org/W3157433620","https://openalex.org/W6630056621","https://openalex.org/W6646369454","https://openalex.org/W6647019796","https://openalex.org/W6729741224","https://openalex.org/W6739162742"],"related_works":["https://openalex.org/W2134916061","https://openalex.org/W2601693592","https://openalex.org/W2545343974","https://openalex.org/W1500439066","https://openalex.org/W2542194775","https://openalex.org/W2182661536","https://openalex.org/W1987031311","https://openalex.org/W2155567810","https://openalex.org/W2520729674","https://openalex.org/W4393237428"],"abstract_inverted_index":{"Massive":[0],"multiple-input":[1],"multiple-output":[2],"(MIMO)":[3],"is":[4,63,91,98],"one":[5],"of":[6,42,132],"the":[7,27,33,40,66,84,92,130,180],"key":[8],"technologies":[9],"in":[10,47,51,70,78,88,125,128,176],"future":[11],"generation":[12],"networks.":[13],"Owing":[14],"to":[15,30,65,74,106,157,178],"their":[16,140],"considerable":[17,158],"spectral":[18,159],"and":[19,56,73],"energy":[20],"efficiency":[21,160],"gains,":[22],"massive":[23,48,121],"MIMO":[24,49,122],"systems":[25],"provide":[26,164],"needed":[28],"performance":[29],"cope":[31],"with":[32],"ever":[34],"increasing":[35],"wireless":[36],"capacity":[37],"demand.":[38],"Nevertheless,":[39],"number":[41],"scheduled":[43],"users":[44,103,137],"stays":[45],"limited":[46,67,75],"both":[50],"time":[52,85],"division":[53,58],"duplexing":[54,59],"(TDD)":[55],"frequency":[57,131],"(FDD)":[60],"systems.":[61],"This":[62,97],"due":[64],"coherence":[68,113,143,172],"time,":[69],"TDD":[71,89,126],"systems,":[72,83],"feedback":[76],"capacity,":[77],"FDD":[79],"mode.":[80],"In":[81,115],"current":[82],"slot":[86],"duration":[87],"mode":[90,127],"same":[93],"for":[94],"all":[95],"users.":[96],"a":[99,120,165,171],"suboptimal":[100],"approach":[101],"since":[102],"are":[104],"subject":[105],"heterogeneous":[107],"Doppler":[108],"spreads":[109],"and,":[110],"consequently,":[111],"different":[112],"times.":[114,144],"this":[116,153],"paper,":[117],"we":[118],"investigate":[119],"system":[123],"operating":[124],"which,":[129],"uplink":[133,149],"training":[134,150],"differs":[135],"among":[136],"based":[138,174],"on":[139],"actual":[141],"channel":[142],"We":[145,162],"argue":[146],"that":[147,169],"optimizing":[148],"by":[151],"exploiting":[152],"diversity":[154],"can":[155],"lead":[156],"gain.":[161],"then":[163],"user":[166],"scheduling":[167],"algorithm":[168],"exploits":[170],"interval":[173],"grouping":[175],"order":[177],"maximize":[179],"achievable":[181],"weighted":[182],"sum":[183],"rate.":[184]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
