{"id":"https://openalex.org/W2551881412","doi":"https://doi.org/10.1587/transcom.2016ebp3136","title":"Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels","display_name":"Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels","publication_year":2016,"publication_date":"2016-11-20","ids":{"openalex":"https://openalex.org/W2551881412","doi":"https://doi.org/10.1587/transcom.2016ebp3136","mag":"2551881412"},"language":"en","primary_location":{"id":"doi:10.1587/transcom.2016ebp3136","is_oa":true,"landing_page_url":"https://doi.org/10.1587/transcom.2016ebp3136","pdf_url":"https://www.jstage.jst.go.jp/article/transcom/E100.B/5/E100.B_2016EBP3136/_pdf","source":{"id":"https://openalex.org/S2493627025","display_name":"IEICE Transactions on Communications","issn_l":"0916-8516","issn":["0916-8516","1745-1345"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4320800604","host_organization_name":"Institute of Electronics, Information and Communication Engineers","host_organization_lineage":["https://openalex.org/P4320800604"],"host_organization_lineage_names":["Institute of Electronics, Information and Communication Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEICE Transactions on Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://www.jstage.jst.go.jp/article/transcom/E100.B/5/E100.B_2016EBP3136/_pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5049945102","display_name":"Tatsuhiko Iwakuni","orcid":"https://orcid.org/0000-0002-7304-0906"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Tatsuhiko IWAKUNI","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5002904170","display_name":"Kazuki Maruta","orcid":"https://orcid.org/0000-0001-9635-3182"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Kazuki MARUTA","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101049656","display_name":"Atsushi Ohta","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Atsushi OHTA","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109478225","display_name":"Yushi Shirato","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Yushi SHIRATO","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100535051","display_name":"Takuto Arai","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Takuto ARAI","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5103721805","display_name":"Iizuka Masataka","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Masataka IIZUKA","raw_affiliation_strings":["NTT Access Networks Service Systems Laboratories, NTT Corporation"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NTT Access Networks Service Systems Laboratories, NTT Corporation","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.4396,"has_fulltext":false,"cited_by_count":31,"citation_normalized_percentile":{"value":0.69276078,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"E100.B","issue":"5","first_page":"865","last_page":"873"},"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":0.9984999895095825,"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":0.9962000250816345,"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":0.8250281810760498},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7435980439186096},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.6308010816574097},{"id":"https://openalex.org/keywords/transmitter","display_name":"Transmitter","score":0.6304823160171509},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6152501702308655},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.5919061303138733},{"id":"https://openalex.org/keywords/channel-state-information","display_name":"Channel state information","score":0.5833340883255005},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.5444421172142029},{"id":"https://openalex.org/keywords/null","display_name":"Null (SQL)","score":0.5231589078903198},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.4740443229675293},{"id":"https://openalex.org/keywords/3g-mimo","display_name":"3G MIMO","score":0.4682634472846985},{"id":"https://openalex.org/keywords/multi-user-mimo","display_name":"Multi-user MIMO","score":0.43397772312164307},{"id":"https://openalex.org/keywords/antenna","display_name":"Antenna (radio)","score":0.4242219030857086},{"id":"https://openalex.org/keywords/topology","display_name":"Topology (electrical circuits)","score":0.3611299693584442},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.34719640016555786},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.339951753616333},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.3255850672721863},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.1843888759613037},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.08898106217384338},{"id":"https://openalex.org/keywords/electrical-engineering","display_name":"Electrical engineering","score":0.07859203219413757}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.8250281810760498},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7435980439186096},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.6308010816574097},{"id":"https://openalex.org/C47798520","wikidata":"https://www.wikidata.org/wiki/Q190157","display_name":"Transmitter","level":3,"score":0.6304823160171509},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6152501702308655},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.5919061303138733},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.5833340883255005},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.5444421172142029},{"id":"https://openalex.org/C203763787","wikidata":"https://www.wikidata.org/wiki/Q371029","display_name":"Null (SQL)","level":2,"score":0.5231589078903198},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.4740443229675293},{"id":"https://openalex.org/C165650700","wikidata":"https://www.wikidata.org/wiki/Q4636347","display_name":"3G MIMO","level":4,"score":0.4682634472846985},{"id":"https://openalex.org/C91330434","wikidata":"https://www.wikidata.org/wiki/Q738298","display_name":"Multi-user MIMO","level":4,"score":0.43397772312164307},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.4242219030857086},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.3611299693584442},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.34719640016555786},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.339951753616333},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.3255850672721863},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.1843888759613037},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.08898106217384338},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.07859203219413757},{"id":"https://openalex.org/C77088390","wikidata":"https://www.wikidata.org/wiki/Q8513","display_name":"Database","level":1,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1587/transcom.2016ebp3136","is_oa":true,"landing_page_url":"https://doi.org/10.1587/transcom.2016ebp3136","pdf_url":"https://www.jstage.jst.go.jp/article/transcom/E100.B/5/E100.B_2016EBP3136/_pdf","source":{"id":"https://openalex.org/S2493627025","display_name":"IEICE Transactions on Communications","issn_l":"0916-8516","issn":["0916-8516","1745-1345"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4320800604","host_organization_name":"Institute of Electronics, Information and Communication Engineers","host_organization_lineage":["https://openalex.org/P4320800604"],"host_organization_lineage_names":["Institute of Electronics, Information and Communication Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEICE Transactions on Communications","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1587/transcom.2016ebp3136","is_oa":true,"landing_page_url":"https://doi.org/10.1587/transcom.2016ebp3136","pdf_url":"https://www.jstage.jst.go.jp/article/transcom/E100.B/5/E100.B_2016EBP3136/_pdf","source":{"id":"https://openalex.org/S2493627025","display_name":"IEICE Transactions on Communications","issn_l":"0916-8516","issn":["0916-8516","1745-1345"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4320800604","host_organization_name":"Institute of Electronics, Information and Communication Engineers","host_organization_lineage":["https://openalex.org/P4320800604"],"host_organization_lineage_names":["Institute of Electronics, Information and Communication Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEICE Transactions on Communications","raw_type":"journal-article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","score":0.800000011920929,"display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2551881412.pdf"},"referenced_works_count":15,"referenced_works":["https://openalex.org/W1539412370","https://openalex.org/W1596939795","https://openalex.org/W1653044198","https://openalex.org/W1657069511","https://openalex.org/W1968869252","https://openalex.org/W2007258614","https://openalex.org/W2016999686","https://openalex.org/W2048515205","https://openalex.org/W2073545380","https://openalex.org/W2114146359","https://openalex.org/W2121367139","https://openalex.org/W2141682101","https://openalex.org/W2150764210","https://openalex.org/W2164664877","https://openalex.org/W2187907991"],"related_works":["https://openalex.org/W4313028534","https://openalex.org/W2761879201","https://openalex.org/W4200145345","https://openalex.org/W2955108753","https://openalex.org/W1996130034","https://openalex.org/W2556017705","https://openalex.org/W2545343974","https://openalex.org/W1561113522","https://openalex.org/W2182661536","https://openalex.org/W2059045613"],"abstract_inverted_index":{"This":[0],"paper":[1],"proposes":[2],"a":[3,97],"null-space":[4,118],"expansion":[5],"scheme":[6,104,126,137],"for":[7,72,108],"multiuser":[8,29],"massive":[9,95],"MIMO":[10,30,62],"transmission":[11],"in":[12,94,138],"order":[13],"to":[14,132],"suppress":[15],"inter-user":[16],"interference":[17],"(IUI)":[18],"triggered":[19],"by":[20,49,76],"the":[21,25,46,57,68,78,87,100,117,124,133],"temporal":[22],"variation":[23],"of":[24,33,67,80,90],"channel.":[26],"The":[27],"downlink":[28],"channel":[31,53,135],"capacity":[32,74],"time":[34,139],"varying":[35,140],"channels":[36],"is":[37],"severely":[38],"degraded":[39],"since":[40],"IUI":[41,102,129],"must":[42],"be":[43],"suppressed":[44],"at":[45,56],"transmitter":[47,58],"side":[48,59],"using":[50],"past":[51],"estimated":[52],"state":[54],"information":[55],"(CSIT).":[60],"Massive":[61],"has":[63,127],"emerged":[64],"as":[65],"one":[66],"most":[69],"promising":[70],"technologies":[71],"further":[73],"enhancement":[75],"increasing":[77],"number":[79],"base":[81],"station":[82],"(BS)":[83],"antenna":[84,113],"elements.":[85],"Exploiting":[86],"excess":[88],"degrees":[89],"freedom":[91],"(DoFs)":[92],"inherent":[93],"MIMO,":[96],"BS":[98],"with":[99],"proposed":[101,125],"suppression":[103,130],"performs":[105],"multiple":[106],"null-steering":[107],"each":[109],"UE":[110],"(User":[111],"Equipment)":[112],"element,":[114],"which":[115],"expands":[116],"dimension.":[119],"Computer":[120],"simulations":[121],"show":[122],"that":[123],"superior":[128],"performance":[131],"existing":[134],"prediction":[136],"channels.":[141]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":8},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":4},{"year":2020,"cited_by_count":5},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":1}],"updated_date":"2026-07-15T18:14:33.161393","created_date":"2025-10-10T00:00:00"}