{"id":"https://openalex.org/W7160440462","doi":"https://doi.org/10.1109/twc.2026.3688908","title":"RIS-Aided OTFS With Index Modulation: Performance Analysis and Phase Optimization","display_name":"RIS-Aided OTFS With Index Modulation: Performance Analysis and Phase Optimization","publication_year":2026,"publication_date":"2026-01-01","ids":{"openalex":"https://openalex.org/W7160440462","doi":"https://doi.org/10.1109/twc.2026.3688908"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2026.3688908","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2026.3688908","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless 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/A5135497553","display_name":"Bo Zhang","orcid":"https://orcid.org/0000-0003-4985-005X"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Bo Zhang","raw_affiliation_strings":["School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, China"],"raw_orcid":"https://orcid.org/0000-0003-4985-005X","affiliations":[{"raw_affiliation_string":"School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, China","institution_ids":["https://openalex.org/I204983213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5135481765","display_name":"Lin Mei","orcid":"https://orcid.org/0000-0001-5856-6697"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Lin Mei","raw_affiliation_strings":["School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, China"],"raw_orcid":"https://orcid.org/0000-0001-5856-6697","affiliations":[{"raw_affiliation_string":"School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin, China","institution_ids":["https://openalex.org/I204983213"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5078754231","display_name":"Kah Chan Teh","orcid":"https://orcid.org/0000-0002-1973-2565"},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Kah Chan Teh","raw_affiliation_strings":["School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Ave, Singapore"],"raw_orcid":"https://orcid.org/0000-0002-1973-2565","affiliations":[{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Ave, Singapore","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5051978835","display_name":"Ertu\u011frul Ba\u015far","orcid":"https://orcid.org/0000-0001-5566-2392"},"institutions":[{"id":"https://openalex.org/I150589677","display_name":"Tampere University of Applied Sciences","ror":"https://ror.org/00bwtjf83","country_code":"FI","type":"education","lineage":["https://openalex.org/I150589677"]},{"id":"https://openalex.org/I4210133110","display_name":"Tampere University","ror":null,"country_code":"FI","type":null,"lineage":["https://openalex.org/I4210133110"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Ertugrul Basar","raw_affiliation_strings":["Department of Electrical Engineering, Tampere Wireless Research Centre, Tampere University, Tampere, Finland"],"raw_orcid":"https://orcid.org/0000-0001-5566-2392","affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Tampere Wireless Research Centre, Tampere University, Tampere, Finland","institution_ids":["https://openalex.org/I4210133110","https://openalex.org/I150589677"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":4,"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":0.48672923,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"25","issue":null,"first_page":"16245","last_page":"16258"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10767","display_name":"Advanced Photonic Communication Systems","score":0.2791000008583069,"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/T10767","display_name":"Advanced Photonic Communication Systems","score":0.2791000008583069,"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/T11873","display_name":"PAPR reduction in OFDM","score":0.27619999647140503,"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/T10232","display_name":"Optical Network Technologies","score":0.23440000414848328,"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/index","display_name":"Index (typography)","score":0.44020000100135803},{"id":"https://openalex.org/keywords/phase","display_name":"Phase (matter)","score":0.4323999881744385},{"id":"https://openalex.org/keywords/time\u2013frequency-analysis","display_name":"Time\u2013frequency analysis","score":0.3255000114440918},{"id":"https://openalex.org/keywords/filtering-theory","display_name":"Filtering theory","score":0.30709999799728394},{"id":"https://openalex.org/keywords/signal-to-noise-ratio","display_name":"Signal-to-noise ratio (imaging)","score":0.3052000105381012},{"id":"https://openalex.org/keywords/signal-processing","display_name":"Signal processing","score":0.3009999990463257}],"concepts":[{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.44020000100135803},{"id":"https://openalex.org/C44280652","wikidata":"https://www.wikidata.org/wiki/Q104837","display_name":"Phase (matter)","level":2,"score":0.4323999881744385},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4212999939918518},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.374099999666214},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.33340001106262207},{"id":"https://openalex.org/C142433447","wikidata":"https://www.wikidata.org/wiki/Q7806653","display_name":"Time\u2013frequency analysis","level":3,"score":0.3255000114440918},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3253999948501587},{"id":"https://openalex.org/C2988922011","wikidata":"https://www.wikidata.org/wiki/Q5449244","display_name":"Filtering theory","level":2,"score":0.30709999799728394},{"id":"https://openalex.org/C13944312","wikidata":"https://www.wikidata.org/wiki/Q7512748","display_name":"Signal-to-noise ratio (imaging)","level":2,"score":0.3052000105381012},{"id":"https://openalex.org/C104267543","wikidata":"https://www.wikidata.org/wiki/Q208163","display_name":"Signal processing","level":3,"score":0.3009999990463257},{"id":"https://openalex.org/C147764199","wikidata":"https://www.wikidata.org/wiki/Q6865248","display_name":"Minification","level":2,"score":0.2847000062465668},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.28349998593330383},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.2768000066280365},{"id":"https://openalex.org/C3020028006","wikidata":"https://www.wikidata.org/wiki/Q9158","display_name":"Electronic mail","level":2,"score":0.27219998836517334},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.2635999917984009}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/twc.2026.3688908","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2026.3688908","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless Communications","raw_type":"journal-article"},{"id":"pmh:oai:trepo.tuni.fi:10024/239110","is_oa":false,"landing_page_url":"https://trepo.tuni.fi/handle/10024/239110","pdf_url":null,"source":{"id":"https://openalex.org/S7407055260","display_name":"Trepo - Institutional Repository of Tampere University","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"acceptedVersion","is_accepted":true,"is_published":false,"raw_source_name":null,"raw_type":"acceptedVersion"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G7719505068","display_name":null,"funder_award_id":"202406120089","funder_id":"https://openalex.org/F4320322725","funder_display_name":"China Scholarship Council"}],"funders":[{"id":"https://openalex.org/F4320322725","display_name":"China Scholarship Council","ror":"https://ror.org/04atp4p48"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":42,"referenced_works":["https://openalex.org/W2113269004","https://openalex.org/W2540924152","https://openalex.org/W2612254130","https://openalex.org/W2754359954","https://openalex.org/W2883182640","https://openalex.org/W2950077417","https://openalex.org/W2951947870","https://openalex.org/W2962951066","https://openalex.org/W2963355537","https://openalex.org/W2969424089","https://openalex.org/W2990747873","https://openalex.org/W3005347223","https://openalex.org/W3021587675","https://openalex.org/W3038878505","https://openalex.org/W3043220753","https://openalex.org/W3099350037","https://openalex.org/W3111243755","https://openalex.org/W3121414045","https://openalex.org/W3129486236","https://openalex.org/W3159402647","https://openalex.org/W3213706254","https://openalex.org/W4225751444","https://openalex.org/W4226323588","https://openalex.org/W4292981572","https://openalex.org/W4293255117","https://openalex.org/W4294068696","https://openalex.org/W4312573917","https://openalex.org/W4312635972","https://openalex.org/W4312813890","https://openalex.org/W4312830106","https://openalex.org/W4313122026","https://openalex.org/W4381748143","https://openalex.org/W4386065583","https://openalex.org/W4388191556","https://openalex.org/W4388966562","https://openalex.org/W4392173797","https://openalex.org/W4396599075","https://openalex.org/W4400276447","https://openalex.org/W4400314813","https://openalex.org/W4404885873","https://openalex.org/W4405518132","https://openalex.org/W4407950015"],"related_works":[],"abstract_inverted_index":{"The":[0],"rapid":[1],"evolution":[2],"of":[3,100,141,152,173,196],"reconfigurable":[4],"intelligent":[5],"surfaces":[6],"(RISs)":[7],"has":[8],"opened":[9],"new":[10],"frontiers":[11],"in":[12,103,144,194],"channel":[13,53,155],"impairment":[14],"mitigation,":[15],"particularly":[16],"through":[17],"passive":[18],"beamforming.":[19],"However,":[20],"when":[21],"integrated":[22,71],"with":[23,72,121,129],"waveforms":[24],"under":[25],"doubly":[26],"selective":[27],"channels,":[28],"a":[29,40,62,79,110],"fundamental":[30],"timescale":[31],"mismatch":[32],"exists:":[33],"the":[34,52,86,95,104,118,122,126,139,150,153,169,187,197],"existing":[35,134],"RIS":[36,165],"designs":[37],"typically":[38],"employ":[39],"single":[41],"static":[42],"phase":[43,112],"configuration":[44],"per":[45],"frame":[46],"due":[47],"to":[48],"hardware":[49],"constraints,":[50],"whereas":[51],"is":[54,178],"time-varying.":[55],"To":[56],"address":[57],"this":[58],"issue,":[59],"we":[60,108,136],"propose":[61],"novel":[63],"RIS-aided":[64],"orthogonal":[65],"time":[66],"frequency":[67],"space":[68],"(OTFS)":[69],"system":[70,162],"index":[73],"modulation":[74],"(IM).":[75],"IM":[76],"serves":[77],"as":[78],"generalized":[80],"framework":[81],"encompassing":[82],"conventional":[83],"modulation,":[84],"enhancing":[85],"spectral":[87],"efficiency":[88],"(SE)":[89],"and":[90,97,164,190,200],"transmission":[91],"flexibility.":[92],"By":[93],"analyzing":[94],"structure":[96,151],"energy":[98],"distribution":[99],"time-varying":[101],"channels":[102],"delay-Doppler":[105],"(DD)":[106],"domain,":[107],"develop":[109],"diagonal":[111],"alignment":[113],"(DPA)":[114],"strategy":[115],"that":[116],"aligns":[117],"RIS-reflected":[119],"paths":[120],"direct":[123],"path,":[124],"maximizing":[125],"achievable":[127,198],"rate":[128,176,199],"negligible":[130],"computational":[131],"overhead.":[132],"Unlike":[133],"works,":[135],"explicitly":[137],"consider":[138],"impact":[140],"imperfect":[142],"biorthogonality":[143],"rectangular":[145],"pulse-shaping":[146],"waveforms,":[147],"which":[148],"alters":[149],"equivalent":[154],"matrix.":[156],"This":[157],"paper":[158],"provides":[159],"detailed":[160],"mathematical":[161],"models":[163],"deployment":[166],"scenarios.":[167],"Furthermore,":[168],"closed-form":[170],"upper":[171],"bound":[172],"bit":[174],"error":[175],"(BER)":[177],"derived":[179],"for":[180],"Rician":[181],"fading":[182],"channels.":[183],"Simulation":[184],"results":[185],"validate":[186],"theoretical":[188],"analysis":[189],"demonstrate":[191],"promising":[192],"performance":[193],"terms":[195],"BER.":[201]},"counts_by_year":[],"updated_date":"2026-07-13T07:31:44.756512","created_date":"2026-05-07T00:00:00"}
