{"id":"https://openalex.org/W7221586597","doi":"https://doi.org/10.1186/s13638-026-02683-w","title":"An iterative interference replica subtraction approach for low-complexity precoding in multiuser massive MIMO null-space expansion","display_name":"An iterative interference replica subtraction approach for low-complexity precoding in multiuser massive MIMO null-space expansion","publication_year":2026,"publication_date":"2026-10-13","ids":{"openalex":"https://openalex.org/W7221586597","doi":"https://doi.org/10.1186/s13638-026-02683-w"},"language":"en","primary_location":{"id":"doi:10.1186/s13638-026-02683-w","doi":"https://doi.org/10.1186/s13638-026-02683-w","is_oa":true,"landing_page_url":"https://doi.org/10.1186/s13638-026-02683-w","pdf_url":null,"source":{"id":"https://openalex.org/S5407055382","display_name":"Journal on Wireless Communications and Networking","issn_l":"3091-4531","issn":["3091-4531"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":["jufo-1"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal on Wireless Communications and Networking","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"https://doi.org/10.1186/s13638-026-02683-w","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5132680078","display_name":"Yuta Tsunoda","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Yuta Tsunoda","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109483961","display_name":"Yuki Sasaki","orcid":"https://orcid.org/0009-0002-2622-833X","observed_orcids":["https://orcid.org/0009-0002-2622-833X"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Yuki Sasaki","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0009-0002-2622-833X","affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5154846177","display_name":"Rui Dinis","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Rui Dinis","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5002904170","display_name":"Kazuki Maruta","orcid":"https://orcid.org/0000-0001-9635-3182","observed_orcids":["https://orcid.org/0000-0001-9635-3182"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Kazuki Maruta","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0000-0001-9635-3182","affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.75406544,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"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/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":9.999999747378752e-05,"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":0.0,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/multi-user-massive-mimo","display_name":"multi-user massive MIMO","score":0.781000018119812},{"id":"https://openalex.org/keywords/inter-user-interference-suppression","display_name":"inter-user interference suppression","score":0.949999988079071},{"id":"https://openalex.org/keywords/low-complexity-precoding","display_name":"low-complexity precoding","score":0.925000011920929},{"id":"https://openalex.org/keywords/time-varying-channels","display_name":"time-varying channels","score":0.9480000138282776},{"id":"https://openalex.org/keywords/null-steering","display_name":"null steering","score":0.6740000247955322},{"id":"https://openalex.org/keywords/user-mobility","display_name":"user mobility","score":0.8100000023841858},{"id":"https://openalex.org/keywords/computational-cost-reduction","display_name":"computational complexity reduction","score":0.5239999890327454}],"concepts":[{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.9581999778747559},{"id":"https://openalex.org/C155437304","wikidata":"https://www.wikidata.org/wiki/Q8069444","display_name":"Zero-forcing precoding","level":5,"score":0.7271000146865845},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6305999755859375},{"id":"https://openalex.org/C2775937380","wikidata":"https://www.wikidata.org/wiki/Q1232589","display_name":"Replica","level":2,"score":0.6204000115394592},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6158999800682068},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.5813999772071838},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.5367000102996826},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.48069998621940613},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.423799991607666},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.4097000062465668},{"id":"https://openalex.org/C159694833","wikidata":"https://www.wikidata.org/wiki/Q2321565","display_name":"Iterative method","level":2,"score":0.3874000012874603},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.34200000762939453},{"id":"https://openalex.org/C68060419","wikidata":"https://www.wikidata.org/wiki/Q40754","display_name":"Subtraction","level":2,"score":0.32339999079704285},{"id":"https://openalex.org/C179799912","wikidata":"https://www.wikidata.org/wiki/Q205084","display_name":"Computational complexity theory","level":2,"score":0.3061999976634979},{"id":"https://openalex.org/C2982854036","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference alignment","level":4,"score":0.27619999647140503},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.2752000093460083},{"id":"https://openalex.org/C194273485","wikidata":"https://www.wikidata.org/wiki/Q1478845","display_name":"Path loss","level":3,"score":0.27239999175071716},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.262800008058548},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2515000104904175}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1186/s13638-026-02683-w","doi":"https://doi.org/10.1186/s13638-026-02683-w","is_oa":true,"landing_page_url":"https://doi.org/10.1186/s13638-026-02683-w","pdf_url":null,"source":{"id":"https://openalex.org/S5407055382","display_name":"Journal on Wireless Communications and Networking","issn_l":"3091-4531","issn":["3091-4531"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":["jufo-1"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal on Wireless Communications and Networking","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1186/s13638-026-02683-w","doi":"https://doi.org/10.1186/s13638-026-02683-w","is_oa":true,"landing_page_url":"https://doi.org/10.1186/s13638-026-02683-w","pdf_url":null,"source":{"id":"https://openalex.org/S5407055382","display_name":"Journal on Wireless Communications and Networking","issn_l":"3091-4531","issn":["3091-4531"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":["jufo-1"],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal on Wireless Communications and Networking","raw_type":"journal-article"},"sustainable_development_goals":[],"sustainable_development_goals_aurora":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G273553189","display_name":null,"funder_award_id":"UID/50008","funder_id":"https://openalex.org/F4320328988","funder_display_name":"Instituto de Telecomunica\u00e7\u00f5es"},{"id":"https://openalex.org/G8365910644","display_name":"Fundamental Establishment and Application Development of Massive MIMO Null-Space Expansion Robust to Channel Time Variations","funder_award_id":"25K01234","funder_id":"https://openalex.org/F4320334764","funder_display_name":"Japan Society for the Promotion of Science"},{"id":"https://openalex.org/G8377216100","display_name":"\u901a\u4fe1\u3068AI\u306e\u878d\u5408\u306b\u3088\u308b\u30aa\u30fc\u30d7\u30f3\u60c5\u5831\u57fa\u76e4\u306e\u7814\u7a76","funder_award_id":"JPMJAP2325","funder_id":"https://openalex.org/F4320334789","funder_display_name":"Japan Science and Technology Agency"},{"id":"https://openalex.org/G911817342","display_name":null,"funder_award_id":"JP-MJSP2151","funder_id":"https://openalex.org/F4320334789","funder_display_name":"Japan Science and Technology Agency"}],"funders":[{"id":"https://openalex.org/F4320328988","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33"},{"id":"https://openalex.org/F4320334764","display_name":"Japan Society for the Promotion of Science","ror":"https://ror.org/00hhkn466"},{"id":"https://openalex.org/F4320334789","display_name":"Japan Science and Technology Agency","ror":"https://ror.org/00097mb19"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"Abstract":[0],"This":[1],"paper":[2],"proposes":[3],"a":[4,98,145],"novel":[5],"precoding":[6,38,50,94,104],"weight":[7,95,105],"that":[8],"reduces":[9,86],"computational":[10],"cost":[11],"and":[12,96,108,123,149],"enhances":[13],"inter-user-interference":[14],"(IUI)":[15],"suppression":[16,34,125],"performance":[17,35],"in":[18,120,142],"time-variant":[19,127],"multi-user":[20],"massive":[21,67],"multiple-input":[22],"multiple-output":[23],"(MIMO)":[24],"environments.":[25],"In":[26],"multiuser":[27],"MIMO":[28,68],"transmission,":[29],"channel":[30,59],"variations":[31],"degrade":[32],"IUI":[33],"of":[36,47,61,79,92,135],"the":[37,48,57,76,87,90,93,112,130,136],"weight.":[39],"Null-space":[40],"expansion":[41,147],"(NSE)":[42],"was":[43],"developed":[44],"as":[45],"one":[46],"promising":[49],"designs":[51],"to":[52,56,75,110],"maintain":[53],"effective":[54],"null-steering":[55],"future":[58],"state":[60],"interfering":[62],"user":[63],"terminals":[64],"(UTs).":[65],"Meanwhile,":[66],"system":[69],"requires":[70],"high":[71,151],"computation":[72,121],"resources":[73],"due":[74],"large":[77],"number":[78],"antennas.":[80],"Iterative":[81],"interference":[82,124],"replica":[83],"subtraction":[84],"(IIRS)":[85],"complexity":[88],"for":[89],"calculation":[91],"provides":[97],"computationally":[99],"efficient":[100],"solution.":[101],"Our":[102],"proposed":[103,137],"integrates":[106],"NSE":[107],"IIRS":[109],"address":[111],"above":[113],"both":[114],"challenges.":[115],"We":[116],"demonstrate":[117],"significant":[118],"improvements":[119],"efficiency":[122],"under":[126],"conditions":[128],"through":[129],"computer":[131],"simulation.":[132],"The":[133],"effectiveness":[134],"IIRS-NSE":[138],"becomes":[139],"particularly":[140],"evident":[141],"scenarios":[143],"with":[144],"small":[146],"factor":[148],"UTs\u2019":[150],"mobility":[152],"environment.":[153]},"counts_by_year":[],"updated_date":"2026-10-15T10:00:46.086208","created_date":"2026-10-14T00:00:00"}