{"id":"https://openalex.org/W7118451100","doi":"https://doi.org/10.1109/vtc2025-fall65116.2025.11310517","title":"Spatial Chirp-based Joint Optimization for Analog Beamforming in Reconfigurable Intelligent Surface Assisted Terahertz Ultra-wideband Systems","display_name":"Spatial Chirp-based Joint Optimization for Analog Beamforming in Reconfigurable Intelligent Surface Assisted Terahertz Ultra-wideband Systems","publication_year":2025,"publication_date":"2025-10-19","ids":{"openalex":"https://openalex.org/W7118451100","doi":"https://doi.org/10.1109/vtc2025-fall65116.2025.11310517"},"language":null,"primary_location":{"id":"doi:10.1109/vtc2025-fall65116.2025.11310517","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2025-fall65116.2025.11310517","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE 102nd Vehicular Technology Conference (VTC2025-Fall)","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/A5122287583","display_name":"Xingyu Chen","orcid":null},"institutions":[{"id":"https://openalex.org/I130828816","display_name":"University of Leeds","ror":"https://ror.org/024mrxd33","country_code":"GB","type":"education","lineage":["https://openalex.org/I130828816"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Xingyu Chen","raw_affiliation_strings":["University of Leeds,School of Electronic & Electrical Eng,Leeds,UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Leeds,School of Electronic & Electrical Eng,Leeds,UK","institution_ids":["https://openalex.org/I130828816"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100418950","display_name":"Li Zhang","orcid":"https://orcid.org/0000-0001-6674-692X"},"institutions":[{"id":"https://openalex.org/I130828816","display_name":"University of Leeds","ror":"https://ror.org/024mrxd33","country_code":"GB","type":"education","lineage":["https://openalex.org/I130828816"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Li Zhang","raw_affiliation_strings":["University of Leeds,School of Electronic & Electrical Eng,Leeds,UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Leeds,School of Electronic & Electrical Eng,Leeds,UK","institution_ids":["https://openalex.org/I130828816"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5121153232","display_name":"Pingzhi Fan","orcid":null},"institutions":[{"id":"https://openalex.org/I4800084","display_name":"Southwest Jiaotong University","ror":"https://ror.org/00hn7w693","country_code":"CN","type":"education","lineage":["https://openalex.org/I4800084"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Pingzhi Fan","raw_affiliation_strings":["Southwest Jiaotong University,Institute of Mobile Communications,Chengdu,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southwest Jiaotong University,Institute of Mobile Communications,Chengdu,China","institution_ids":["https://openalex.org/I4800084"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100452023","display_name":"Ke Chen","orcid":"https://orcid.org/0009-0000-8184-3605"},"institutions":[{"id":"https://openalex.org/I130828816","display_name":"University of Leeds","ror":"https://ror.org/024mrxd33","country_code":"GB","type":"education","lineage":["https://openalex.org/I130828816"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Ke Chen","raw_affiliation_strings":["University of Leeds,School of Electronic & Electrical Eng,Leeds,UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Leeds,School of Electronic & Electrical Eng,Leeds,UK","institution_ids":["https://openalex.org/I130828816"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5060433763","display_name":"Yejing Fan","orcid":"https://orcid.org/0000-0001-8038-7337"},"institutions":[{"id":"https://openalex.org/I130828816","display_name":"University of Leeds","ror":"https://ror.org/024mrxd33","country_code":"GB","type":"education","lineage":["https://openalex.org/I130828816"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Yejing Fan","raw_affiliation_strings":["University of Leeds,School of Electronic & Electrical Eng,Leeds,UK"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Leeds,School of Electronic & Electrical Eng,Leeds,UK","institution_ids":["https://openalex.org/I130828816"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"6"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.8698999881744385,"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/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.8698999881744385,"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":0.05590000003576279,"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/T12024","display_name":"Ultra-Wideband Communications Technology","score":0.017400000244379044,"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/beamforming","display_name":"Beamforming","score":0.7472000122070312},{"id":"https://openalex.org/keywords/joint","display_name":"Joint (building)","score":0.5554999709129333},{"id":"https://openalex.org/keywords/terahertz-radiation","display_name":"Terahertz radiation","score":0.5382000207901001},{"id":"https://openalex.org/keywords/phase","display_name":"Phase (matter)","score":0.5105000138282776},{"id":"https://openalex.org/keywords/optimization-problem","display_name":"Optimization problem","score":0.46810001134872437},{"id":"https://openalex.org/keywords/polynomial","display_name":"Polynomial","score":0.3767000138759613},{"id":"https://openalex.org/keywords/iterative-method","display_name":"Iterative method","score":0.35280001163482666},{"id":"https://openalex.org/keywords/beam","display_name":"Beam (structure)","score":0.33629998564720154}],"concepts":[{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.7472000122070312},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6843000054359436},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.5812000036239624},{"id":"https://openalex.org/C18555067","wikidata":"https://www.wikidata.org/wiki/Q8375051","display_name":"Joint (building)","level":2,"score":0.5554999709129333},{"id":"https://openalex.org/C107816215","wikidata":"https://www.wikidata.org/wiki/Q647887","display_name":"Terahertz radiation","level":2,"score":0.5382000207901001},{"id":"https://openalex.org/C44280652","wikidata":"https://www.wikidata.org/wiki/Q104837","display_name":"Phase (matter)","level":2,"score":0.5105000138282776},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.46810001134872437},{"id":"https://openalex.org/C90119067","wikidata":"https://www.wikidata.org/wiki/Q43260","display_name":"Polynomial","level":2,"score":0.3767000138759613},{"id":"https://openalex.org/C159694833","wikidata":"https://www.wikidata.org/wiki/Q2321565","display_name":"Iterative method","level":2,"score":0.35280001163482666},{"id":"https://openalex.org/C168834538","wikidata":"https://www.wikidata.org/wiki/Q3705329","display_name":"Beam (structure)","level":2,"score":0.33629998564720154},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.3208000063896179},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.319599986076355},{"id":"https://openalex.org/C2776799497","wikidata":"https://www.wikidata.org/wiki/Q484298","display_name":"Surface (topology)","level":2,"score":0.303600013256073},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.29339998960494995},{"id":"https://openalex.org/C8590192","wikidata":"https://www.wikidata.org/wiki/Q1054694","display_name":"Frequency response","level":2,"score":0.2930000126361847},{"id":"https://openalex.org/C98045186","wikidata":"https://www.wikidata.org/wiki/Q205663","display_name":"Process (computing)","level":2,"score":0.2888000011444092},{"id":"https://openalex.org/C101765175","wikidata":"https://www.wikidata.org/wiki/Q577764","display_name":"Communications system","level":2,"score":0.28349998593330383},{"id":"https://openalex.org/C54767332","wikidata":"https://www.wikidata.org/wiki/Q1751572","display_name":"Phase response","level":3,"score":0.2815999984741211},{"id":"https://openalex.org/C2778116611","wikidata":"https://www.wikidata.org/wiki/Q25110567","display_name":"Frequency band","level":3,"score":0.2718999981880188},{"id":"https://openalex.org/C61797465","wikidata":"https://www.wikidata.org/wiki/Q1188986","display_name":"Term (time)","level":2,"score":0.2667999863624573},{"id":"https://openalex.org/C177454536","wikidata":"https://www.wikidata.org/wiki/Q578290","display_name":"Emphasis (telecommunications)","level":2,"score":0.2614000141620636}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/vtc2025-fall65116.2025.11310517","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2025-fall65116.2025.11310517","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE 102nd Vehicular Technology Conference (VTC2025-Fall)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W2034667789","https://openalex.org/W2061770415","https://openalex.org/W2248415020","https://openalex.org/W2739778833","https://openalex.org/W2981096252","https://openalex.org/W3011830499","https://openalex.org/W3045835314","https://openalex.org/W3091752016","https://openalex.org/W3121978485","https://openalex.org/W3201151435","https://openalex.org/W3202699980","https://openalex.org/W4226073470","https://openalex.org/W4285192749","https://openalex.org/W4292070657","https://openalex.org/W4313590877","https://openalex.org/W4385270061","https://openalex.org/W4387871185","https://openalex.org/W4400277466"],"related_works":[],"abstract_inverted_index":{"This":[0],"paper":[1],"proposes":[2],"a":[3,44,113,141],"spatial":[4],"chirp-based":[5],"joint":[6],"optimization":[7,105],"method":[8,126],"for":[9,34,43,79,144],"analog":[10,146],"beamforming":[11],"in":[12,132],"RIS-assisted":[13],"THz":[14,19,80],"ultra-wideband":[15,48],"communication":[16],"systems.":[17,81],"The":[18],"band":[20],"(0.1-10":[21],"THz)":[22],"offers":[23],"significantly":[24,63],"wider":[25],"bandwidth,":[26],"enabling":[27],"Tbps":[28],"data":[29],"rates,":[30],"which":[31,62],"are":[32,41],"crucial":[33],"6G":[35],"communications.":[36],"However,":[37],"traditional":[38],"phase":[39,51,95,135],"shifters":[40],"optimized":[42],"single":[45],"frequency.":[46],"In":[47,82],"systems,":[49],"the":[50,92,104],"response":[52],"deviates":[53],"as":[54,70,107],"frequency":[55],"varies,":[56],"leading":[57],"to":[58,90,118],"beam":[59],"squinting":[60],"problem,":[61],"degrades":[64],"system":[65,109],"performance.":[66],"Existing":[67],"solutions,":[68],"such":[69],"true-time-delay":[71],"architectures,":[72],"impose":[73],"excessive":[74],"complexity,":[75],"making":[76],"them":[77],"impractical":[78],"this":[83],"work,":[84],"we":[85],"propose":[86],"leveraging":[87],"polynomial":[88],"expansion":[89],"optimize":[91],"spatially":[93],"dependent":[94],"functions":[96],"of":[97],"RIS,":[98],"Tx,":[99],"and":[100,111,129,138],"Rx.":[101],"We":[102],"formulate":[103],"problem":[106],"maximizing":[108],"throughput,":[110,137],"develop":[112],"gradient":[114],"ascent-based":[115],"iterative":[116],"algorithm":[117],"solve":[119],"it.":[120],"Simulation":[121],"results":[122],"demonstrate":[123],"that":[124],"our":[125],"outperforms":[127],"conventional":[128],"state-of-the-art":[130],"approaches":[131],"metrics":[133],"including":[134],"response,":[136],"BER,":[139],"providing":[140],"cost-effective":[142],"solution":[143],"optimizing":[145],"beamforming.":[147]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2026-01-08T00:00:00"}