{"id":"https://openalex.org/W4385815484","doi":"https://doi.org/10.1109/vtc2023-spring57618.2023.10199655","title":"Interference Reduction between HAPSs using Subarray Grouping and Nullforming Techniques for Cylindrical Massive MIMO Systems","display_name":"Interference Reduction between HAPSs using Subarray Grouping and Nullforming Techniques for Cylindrical Massive MIMO Systems","publication_year":2023,"publication_date":"2023-06-01","ids":{"openalex":"https://openalex.org/W4385815484","doi":"https://doi.org/10.1109/vtc2023-spring57618.2023.10199655"},"language":"en","primary_location":{"id":"doi:10.1109/vtc2023-spring57618.2023.10199655","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2023-spring57618.2023.10199655","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)","raw_type":"proceedings-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":false,"raw_author_name":"Koji Tashiro","raw_affiliation_strings":["Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064","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":["Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064","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":["Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Telecom Center Building East Tower 19F,SoftBank Corp.,Tokyo,Japan,135-0064","institution_ids":["https://openalex.org/I4210120159"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.2454,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.52631579,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":95,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"5"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9994999766349792,"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":0.9994999766349792,"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/T12042","display_name":"Satellite Communication Systems","score":0.9993000030517578,"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/T11133","display_name":"UAV Applications and Optimization","score":0.998199999332428,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/precoding","display_name":"Precoding","score":0.800186276435852},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.7451059818267822},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.7041990756988525},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6778227090835571},{"id":"https://openalex.org/keywords/zero-forcing-precoding","display_name":"Zero-forcing precoding","score":0.5943096280097961},{"id":"https://openalex.org/keywords/reduction","display_name":"Reduction (mathematics)","score":0.5716365575790405},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.4883110523223877},{"id":"https://openalex.org/keywords/interference-alignment","display_name":"Interference alignment","score":0.44003167748451233},{"id":"https://openalex.org/keywords/antenna","display_name":"Antenna (radio)","score":0.4351264238357544},{"id":"https://openalex.org/keywords/adjacent-channel-interference","display_name":"Adjacent-channel interference","score":0.4188993573188782},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.3534397482872009},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.34841495752334595},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.18800508975982666},{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.10775101184844971},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.09063032269477844}],"concepts":[{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.800186276435852},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.7451059818267822},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7041990756988525},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6778227090835571},{"id":"https://openalex.org/C155437304","wikidata":"https://www.wikidata.org/wiki/Q8069444","display_name":"Zero-forcing precoding","level":5,"score":0.5943096280097961},{"id":"https://openalex.org/C111335779","wikidata":"https://www.wikidata.org/wiki/Q3454686","display_name":"Reduction (mathematics)","level":2,"score":0.5716365575790405},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.4883110523223877},{"id":"https://openalex.org/C2982854036","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference alignment","level":4,"score":0.44003167748451233},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.4351264238357544},{"id":"https://openalex.org/C134222854","wikidata":"https://www.wikidata.org/wiki/Q4683140","display_name":"Adjacent-channel interference","level":4,"score":0.4188993573188782},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.3534397482872009},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.34841495752334595},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18800508975982666},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.10775101184844971},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.09063032269477844},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/vtc2023-spring57618.2023.10199655","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2023-spring57618.2023.10199655","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320335839","display_name":"National Institute of Information and Communications Technology","ror":"https://ror.org/016bgq349"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W2084521121","https://openalex.org/W2097519547","https://openalex.org/W2499387191","https://openalex.org/W2564175160","https://openalex.org/W2585894118","https://openalex.org/W2885423658","https://openalex.org/W2963008748","https://openalex.org/W3156195074","https://openalex.org/W3170405294","https://openalex.org/W3174495368","https://openalex.org/W3205146236","https://openalex.org/W4283820605","https://openalex.org/W4285742795"],"related_works":["https://openalex.org/W2111825998","https://openalex.org/W1979957996","https://openalex.org/W1731022149","https://openalex.org/W1996933839","https://openalex.org/W2326544815","https://openalex.org/W2108549112","https://openalex.org/W2360690704","https://openalex.org/W2158184580","https://openalex.org/W1565141247","https://openalex.org/W1976511355"],"abstract_inverted_index":{"High-altitude":[0],"platform":[1],"station":[2],"(HAPS)":[3],"is":[4,42],"a":[5,23,43,59,71,138,143],"promising":[6],"technology":[7],"for":[8,64],"extending":[9],"the":[10,37,48,78,81,97,101,113,122,126],"coverage":[11],"of":[12,129],"cellular":[13],"networks.":[14],"For":[15],"multi-HAPS":[16,139],"scenarios":[17],"in":[18,33,52,137],"which":[19],"multiple":[20],"HAPSs":[21,41],"use":[22],"single":[24],"shared":[25],"frequency":[26],"band":[27],"to":[28,76,134,142],"communicate":[29],"with":[30,70,80,103],"terrestrial":[31,130],"users":[32,131],"their":[34],"service":[35,53,83,105],"areas,":[36],"interference":[38,79,102,150],"between":[39],"neighboring":[40,82],"concerning":[44],"issue":[45],"that":[46,121],"degrades":[47],"overall":[49],"system":[50],"capacity":[51],"links.":[54],"Accordingly,":[55],"this":[56],"study":[57],"proposes":[58],"novel":[60],"two-stage":[61],"precoding":[62],"scheme":[63,91],"massive":[65],"multiple-input":[66],"and":[67,94,110],"multiple-output":[68],"systems":[69],"large-scale":[72],"cylindrical":[73],"array":[74],"antenna":[75],"mitigate":[77],"areas":[84,106],"covered":[85],"by":[86,132],"other":[87,104],"HAPSs.":[88],"The":[89],"proposed":[90,123],"comprises":[92],"outer":[93,98],"inner":[95,114],"precoders;":[96],"precoder":[99,115,147],"reduces":[100],"via":[107],"subarray":[108],"grouping":[109],"nullforming,":[111],"whereas":[112],"generates":[116],"user-specific":[117],"beams.":[118],"Results":[119],"show":[120],"precoders":[124],"improve":[125],"signal-to-interference-plus-noise":[127],"ratio":[128],"up":[133],"6.8":[135],"dB":[136],"scenario":[140],"compared":[141],"conventional":[144],"fully-connected":[145],"zero-forcing":[146],"without":[148],"any":[149],"reduction":[151],"techniques.":[152]},"counts_by_year":[{"year":2025,"cited_by_count":2}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}