{"id":"https://openalex.org/W4413212616","doi":"https://doi.org/10.1109/twc.2025.3595411","title":"IRS-Enhanced Cell-Free mMIMO-OTFS Systems: Learning-Based Channel Estimator and SE Analysis","display_name":"IRS-Enhanced Cell-Free mMIMO-OTFS Systems: Learning-Based Channel Estimator and SE Analysis","publication_year":2025,"publication_date":"2025-08-11","ids":{"openalex":"https://openalex.org/W4413212616","doi":"https://doi.org/10.1109/twc.2025.3595411"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2025.3595411","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3595411","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/A5040633927","display_name":"Mudasir Ahmad Sheikh","orcid":"https://orcid.org/0000-0002-0163-3315"},"institutions":[{"id":"https://openalex.org/I94234084","display_name":"Indian Institute of Technology Kanpur","ror":"https://ror.org/05pjsgx75","country_code":"IN","type":"education","lineage":["https://openalex.org/I94234084"]}],"countries":["IN"],"is_corresponding":true,"raw_author_name":"Mudasir Ahmad Sheikh","raw_affiliation_strings":["Department of Electrical Engineering, IIT Kanpur, Kanpur, India","Department of Electrical Engineering, IIT Kanpur, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, Kanpur, India","institution_ids":["https://openalex.org/I94234084"]},{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, India","institution_ids":["https://openalex.org/I94234084"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5077649537","display_name":"Nishant Arya","orcid":"https://orcid.org/0000-0002-3930-2984"},"institutions":[{"id":"https://openalex.org/I36258959","display_name":"University of California, San Diego","ror":"https://ror.org/0168r3w48","country_code":"US","type":"education","lineage":["https://openalex.org/I36258959"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Nishant Arya","raw_affiliation_strings":["Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, USA"],"affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, USA","institution_ids":["https://openalex.org/I36258959"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5084500720","display_name":"Anupama Rajoriya","orcid":"https://orcid.org/0000-0002-3650-7925"},"institutions":[{"id":"https://openalex.org/I94234084","display_name":"Indian Institute of Technology Kanpur","ror":"https://ror.org/05pjsgx75","country_code":"IN","type":"education","lineage":["https://openalex.org/I94234084"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Anupama Rajoriya","raw_affiliation_strings":["Department of Electrical Engineering, IIT Kanpur, Kanpur, India","Department of Electrical Engineering, IIT Kanpur, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, Kanpur, India","institution_ids":["https://openalex.org/I94234084"]},{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, India","institution_ids":["https://openalex.org/I94234084"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5004699135","display_name":"Rohit Budhiraja","orcid":"https://orcid.org/0000-0001-5747-1549"},"institutions":[{"id":"https://openalex.org/I94234084","display_name":"Indian Institute of Technology Kanpur","ror":"https://ror.org/05pjsgx75","country_code":"IN","type":"education","lineage":["https://openalex.org/I94234084"]}],"countries":["IN"],"is_corresponding":false,"raw_author_name":"Rohit Budhiraja","raw_affiliation_strings":["Department of Electrical Engineering, IIT Kanpur, Kanpur, India","Department of Electrical Engineering, IIT Kanpur, India"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, Kanpur, India","institution_ids":["https://openalex.org/I94234084"]},{"raw_affiliation_string":"Department of Electrical Engineering, IIT Kanpur, India","institution_ids":["https://openalex.org/I94234084"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5040633927"],"corresponding_institution_ids":["https://openalex.org/I94234084"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.24273368,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"25","issue":null,"first_page":"2213","last_page":"2230"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11873","display_name":"PAPR reduction in OFDM","score":0.9929999709129333,"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/T11873","display_name":"PAPR reduction in OFDM","score":0.9929999709129333,"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/T10767","display_name":"Advanced Photonic Communication Systems","score":0.9839000105857849,"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":0.9750999808311462,"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":0.6883783936500549},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.5521227717399597},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.4339751601219177},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.19947364926338196},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.16767776012420654},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.15728458762168884}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6883783936500549},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.5521227717399597},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.4339751601219177},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.19947364926338196},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.16767776012420654},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.15728458762168884}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/twc.2025.3595411","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3595411","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"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W2016625067","https://openalex.org/W2286275639","https://openalex.org/W2593893328","https://openalex.org/W2612254130","https://openalex.org/W2770606349","https://openalex.org/W2888002205","https://openalex.org/W2899406779","https://openalex.org/W2950013137","https://openalex.org/W2950077417","https://openalex.org/W2951947870","https://openalex.org/W2962951066","https://openalex.org/W2971912794","https://openalex.org/W2981792785","https://openalex.org/W2990747873","https://openalex.org/W3011747750","https://openalex.org/W3034448035","https://openalex.org/W3082571270","https://openalex.org/W3120875796","https://openalex.org/W3200021459","https://openalex.org/W3207045915","https://openalex.org/W4226242403","https://openalex.org/W4292981572","https://openalex.org/W4309759303","https://openalex.org/W4312573917","https://openalex.org/W4312635972","https://openalex.org/W4367016761","https://openalex.org/W4387092289","https://openalex.org/W4388207438","https://openalex.org/W4388623131","https://openalex.org/W4390738577","https://openalex.org/W4392152251","https://openalex.org/W4402159634","https://openalex.org/W4402809594","https://openalex.org/W4408323550","https://openalex.org/W4409761069"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W4287880334","https://openalex.org/W2390279801","https://openalex.org/W4391913857","https://openalex.org/W2358668433","https://openalex.org/W4396701345","https://openalex.org/W4366700029","https://openalex.org/W2376932109"],"abstract_inverted_index":{"We":[0,30,60,104,152,166],"estimate":[1,49],"the":[2,6,39,63,74,78,97,130,135,145,149,170],"channel":[3,69,87,131],"and":[4,80,92,114,138,184],"analyze":[5],"spectral":[7],"efficiency":[8],"(SE)":[9],"of":[10,51,77],"an":[11],"uplink":[12],"cell-free":[13],"(CF)":[14],"massive":[15],"multiple-input":[16],"multiple-output":[17],"(mMIMO)":[18],"intelligent":[19],"reflecting":[20],"surface":[21],"(IRS)":[22],"aided":[23],"orthogonal":[24],"time":[25],"frequency":[26],"space":[27],"(OTFS)":[28],"system.":[29,165],"introduce":[31],"two":[32],"novel":[33,107],"pilot":[34,40],"frames,":[35],"which":[36,123],"significantly":[37],"reduce":[38],"overhead":[41],"by":[42],"enabling":[43],"each":[44],"access":[45],"point":[46],"(AP)":[47],"to":[48,96,110,128,143],"channels":[50],"all":[52],"IRS":[53,102],"elements":[54],"in":[55,134,148],"a":[56,106,117,155,174],"single":[57],"OTFS":[58],"frame.":[59],"show":[61,168],"that":[62,169],"delay-Doppler":[64],"(DD)":[65],"domain":[66],"cascaded":[67,85],"user-IRS-AP":[68],"can":[70],"be":[71],"expressed":[72],"as":[73],"twisted":[75,89],"convolution":[76],"user-IRS":[79],"IRS-AP":[81],"DD":[82,86,99],"channels.":[83],"The":[84,187],"exhibits":[88],"convolutional":[90,108,118],"sparsity":[91,94],"common":[93],"due":[95],"shared":[98],"profile":[100],"across":[101],"elements.":[103],"propose":[105],"prior":[109,146],"capture":[111],"these":[112],"sparsities,":[113],"then":[115],"develop":[116],"Bayesian":[119,183],"learning":[120],"(ConvBL)":[121],"algorithm,":[122],"employs":[124],"expectation-maximization":[125],"(EM)":[126],"procedure":[127],"calculate":[129,144],"posterior":[132],"distribution":[133],"E":[136],"step,":[137],"natural":[139],"gradient":[140],"descent":[141],"algorithm":[142,172,188],"parameters":[147],"M":[150],"step.":[151],"also":[153,189],"derive":[154],"closed-form":[156],"SE":[157,192],"lower":[158,176],"bound":[159],"for":[160],"our":[161],"CF":[162],"mMIMO":[163],"IRS-OTFS":[164],"numerically":[167],"ConvBL":[171],"has":[173],"much":[175],"normalized":[177],"mean":[178],"squared":[179],"error":[180],"than":[181],"other":[182],"non-Bayesian":[185],"algorithms.":[186],"provides":[190],"significant":[191],"gains":[193],"over":[194],"them.":[195]},"counts_by_year":[],"updated_date":"2026-01-10T23:39:48.068659","created_date":"2025-10-10T00:00:00"}
