{"id":"https://openalex.org/W3205146236","doi":"https://doi.org/10.1587/transcom.2021wwp0003","title":"Cylindrical Massive MIMO System with Low-Complexity Angle-Based User Selection for High-Altitude Platform Stations","display_name":"Cylindrical Massive MIMO System with Low-Complexity Angle-Based User Selection for High-Altitude Platform Stations","publication_year":2021,"publication_date":"2021-10-14","ids":{"openalex":"https://openalex.org/W3205146236","doi":"https://doi.org/10.1587/transcom.2021wwp0003","mag":"3205146236"},"language":"en","primary_location":{"id":"doi:10.1587/transcom.2021wwp0003","is_oa":false,"landing_page_url":"https://doi.org/10.1587/transcom.2021wwp0003","pdf_url":null,"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":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5069374613","display_name":"Koji Tashiro","orcid":"https://orcid.org/0000-0002-8643-4947"},"institutions":[{"id":"https://openalex.org/I4210120159","display_name":"SoftBank Group (Japan)","ror":"https://ror.org/02ew2ks20","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210120159"]}],"countries":["JP"],"is_corresponding":true,"raw_author_name":"Koji TASHIRO","raw_affiliation_strings":["Technology Research Laboratory, SoftBank Corp"],"affiliations":[{"raw_affiliation_string":"Technology Research Laboratory, SoftBank Corp","institution_ids":["https://openalex.org/I4210120159"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5091745595","display_name":"Kenji Hoshino","orcid":"https://orcid.org/0000-0001-6431-674X"},"institutions":[{"id":"https://openalex.org/I4210120159","display_name":"SoftBank Group (Japan)","ror":"https://ror.org/02ew2ks20","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210120159"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kenji HOSHINO","raw_affiliation_strings":["Technology Research Laboratory, SoftBank Corp"],"affiliations":[{"raw_affiliation_string":"Technology Research Laboratory, SoftBank Corp","institution_ids":["https://openalex.org/I4210120159"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5002553294","display_name":"Atsushi Nagate","orcid":null},"institutions":[{"id":"https://openalex.org/I4210120159","display_name":"SoftBank Group (Japan)","ror":"https://ror.org/02ew2ks20","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210120159"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Atsushi NAGATE","raw_affiliation_strings":["Technology Research Laboratory, SoftBank Corp"],"affiliations":[{"raw_affiliation_string":"Technology Research Laboratory, SoftBank Corp","institution_ids":["https://openalex.org/I4210120159"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5069374613"],"corresponding_institution_ids":["https://openalex.org/I4210120159"],"apc_list":null,"apc_paid":null,"fwci":0.5014,"has_fulltext":false,"cited_by_count":10,"citation_normalized_percentile":{"value":0.64366663,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":98},"biblio":{"volume":"E105.B","issue":"4","first_page":"449","last_page":"460"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","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"}},"topics":[{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","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/T11133","display_name":"UAV Applications and Optimization","score":0.9994000196456909,"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/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.9988999962806702,"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/computer-science","display_name":"Computer science","score":0.7656017541885376},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.6016525030136108},{"id":"https://openalex.org/keywords/antenna","display_name":"Antenna (radio)","score":0.5526325702667236},{"id":"https://openalex.org/keywords/orthogonality","display_name":"Orthogonality","score":0.46743860840797424},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.438934326171875},{"id":"https://openalex.org/keywords/transmitter-power-output","display_name":"Transmitter power output","score":0.4146284759044647},{"id":"https://openalex.org/keywords/topology","display_name":"Topology (electrical circuits)","score":0.4099242091178894},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.3520825505256653},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.32705745100975037},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.32526642084121704},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.31122303009033203},{"id":"https://openalex.org/keywords/electrical-engineering","display_name":"Electrical engineering","score":0.19819509983062744},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.111753910779953},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.08747392892837524}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7656017541885376},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6016525030136108},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.5526325702667236},{"id":"https://openalex.org/C17137986","wikidata":"https://www.wikidata.org/wiki/Q215067","display_name":"Orthogonality","level":2,"score":0.46743860840797424},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.438934326171875},{"id":"https://openalex.org/C65422117","wikidata":"https://www.wikidata.org/wiki/Q358527","display_name":"Transmitter power output","level":4,"score":0.4146284759044647},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.4099242091178894},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3520825505256653},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.32705745100975037},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.32526642084121704},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.31122303009033203},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.19819509983062744},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.111753910779953},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.08747392892837524},{"id":"https://openalex.org/C47798520","wikidata":"https://www.wikidata.org/wiki/Q190157","display_name":"Transmitter","level":3,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1587/transcom.2021wwp0003","is_oa":false,"landing_page_url":"https://doi.org/10.1587/transcom.2021wwp0003","pdf_url":null,"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":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":0.5099999904632568}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W2017844652","https://openalex.org/W2023877378","https://openalex.org/W2035750833","https://openalex.org/W2116255173","https://openalex.org/W2129533376","https://openalex.org/W2135479785","https://openalex.org/W2138406908","https://openalex.org/W2143927285","https://openalex.org/W2151795416","https://openalex.org/W2170503498","https://openalex.org/W2585894118","https://openalex.org/W2769850324","https://openalex.org/W2918864279","https://openalex.org/W2954359771","https://openalex.org/W2954857446","https://openalex.org/W2963008748","https://openalex.org/W2994008524","https://openalex.org/W2996950790","https://openalex.org/W3019396386","https://openalex.org/W3021261488","https://openalex.org/W3094704314","https://openalex.org/W3130976411","https://openalex.org/W3156195074","https://openalex.org/W3170405294"],"related_works":["https://openalex.org/W2059318893","https://openalex.org/W2095582735","https://openalex.org/W1965698851","https://openalex.org/W834942123","https://openalex.org/W4232542516","https://openalex.org/W3176637561","https://openalex.org/W1587967017","https://openalex.org/W1967331680","https://openalex.org/W130629949","https://openalex.org/W2606422720"],"abstract_inverted_index":{"High-altitude":[0],"platform":[1],"stations":[2],"(HAPSs)":[3],"are":[4],"recognized":[5],"as":[6,155],"a":[7,30,34,77,85,89,122,141,149,156,170,184,223],"promising":[8],"technology":[9],"for":[10,175],"coverage":[11,35,74,130],"extension":[12],"in":[13,241,263],"the":[14,45,73,105,159,191,197,204,207,218,229,233,238,242,255,259,264],"sixth":[15],"generation":[16],"(6G)":[17],"mobile":[18],"communications":[19],"and":[20,39,52,64,134,209,249],"beyond.":[21],"The":[22],"purpose":[23],"of":[24,37,91,94,107,132,158,206,258,266,270],"this":[25,119,138],"study":[26],"is":[27,82,153,177,262],"to":[28,68,84,126],"develop":[29],"HAPS":[31,55],"system":[32,125,195,243],"with":[33,88,183,247],"radius":[36,90,131],"100km":[38,133,185],"high":[40,111,116,135],"capacity":[41,216,244],"by":[42,76,200],"focusing":[43],"on":[44,104],"following":[46],"two":[47],"aspects:":[48],"array":[49,80,225],"antenna":[50,81],"structure":[51],"user":[53,99,144,150,167,252],"selection.":[54,253],"systems":[56],"must":[57],"jointly":[58],"use":[59],"massive":[60],"multiple-input":[61],"multiple-output":[62],"(mMIMO)":[63],"multiuser":[65],"MIMO":[66],"techniques":[67],"increase":[69],"their":[70],"capacity.":[71,136],"However,":[72],"achieved":[75],"conventional":[78,97,219],"planar":[79,224],"limited":[83],"circular":[86],"area":[87,182],"only":[92,267],"tens":[93],"kilometers.":[95],"A":[96],"semi-orthogonal":[98],"selection":[100,145,151],"(SUS)":[101],"scheme":[102,236],"based":[103],"orthogonality":[106],"channel":[108],"vectors":[109],"achieves":[110,211],"capacity,":[112],"but":[113],"it":[114,210],"has":[115],"complexity.":[117],"First,":[118],"paper":[120,139],"proposes":[121],"cylindrical":[123,193],"mMIMO":[124,194,220],"achieve":[127],"an":[128,181],"ultra-wide":[129],"Second,":[137],"presents":[140],"novel":[142],"angle-based":[143],"(AUS)":[146],"scheme,":[147],"where":[148],"problem":[152],"formulated":[154],"maximization":[157],"minimum":[160],"angular":[161],"difference":[162],"between":[163],"users":[164],"over":[165],"all":[166],"groups.":[168],"Finally,":[169],"low-complexity":[171],"suboptimal":[172],"algorithm":[173],"(SA)":[174],"AUS":[176,235],"also":[178],"proposed.":[179],"Assuming":[180],"radius,":[186],"simulation":[187],"results":[188,230],"demonstrate":[189],"that":[190,232,269],"proposed":[192,234,260],"improves":[196,237],"signal-to-interference-plus-noise":[198],"ratio":[199],"approx.":[201,212],"12dB":[202],"at":[203],"boundary":[205],"area,":[208],"1.5":[213],"times":[214],"higher":[215],"than":[217],"which":[221],"uses":[222],"antenna.":[226],"In":[227],"addition,":[228],"show":[231],"lower":[239],"percentiles":[240],"distribution":[245],"compared":[246],"SUS":[248],"basic":[250],"random":[251],"Furthermore,":[254],"computational":[256],"complexity":[257],"SA":[261],"order":[265],"1/4000":[268],"SUS.":[271]},"counts_by_year":[{"year":2025,"cited_by_count":5},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":2}],"updated_date":"2026-02-24T19:35:01.260952","created_date":"2025-10-10T00:00:00"}
