{"id":"https://openalex.org/W4323521040","doi":"https://doi.org/10.1109/ieeeconf56349.2022.10051997","title":"Maximum Likelihood Channel Estimation for RIS-Aided Communications with LOS Channels","display_name":"Maximum Likelihood Channel Estimation for RIS-Aided Communications with LOS Channels","publication_year":2022,"publication_date":"2022-10-31","ids":{"openalex":"https://openalex.org/W4323521040","doi":"https://doi.org/10.1109/ieeeconf56349.2022.10051997"},"language":"en","primary_location":{"id":"doi:10.1109/ieeeconf56349.2022.10051997","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ieeeconf56349.2022.10051997","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2022 56th Asilomar Conference on Signals, Systems, and Computers","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/A5062293532","display_name":"Emil Bj\u00f6rnson","orcid":"https://orcid.org/0000-0002-5954-434X"},"institutions":[{"id":"https://openalex.org/I86987016","display_name":"KTH Royal Institute of Technology","ror":"https://ror.org/026vcq606","country_code":"SE","type":"education","lineage":["https://openalex.org/I86987016"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Emil Bj\u00f6rnson","raw_affiliation_strings":["KTH Royal Institute of Technology,Department of Computer Science,Stockholm,Sweden,SE-10044"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"KTH Royal Institute of Technology,Department of Computer Science,Stockholm,Sweden,SE-10044","institution_ids":["https://openalex.org/I86987016"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5053814548","display_name":"Parisa Ramezani","orcid":"https://orcid.org/0000-0002-8822-6412"},"institutions":[{"id":"https://openalex.org/I86987016","display_name":"KTH Royal Institute of Technology","ror":"https://ror.org/026vcq606","country_code":"SE","type":"education","lineage":["https://openalex.org/I86987016"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Parisa Ramezani","raw_affiliation_strings":["KTH Royal Institute of Technology,Department of Computer Science,Stockholm,Sweden,SE-10044"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"KTH Royal Institute of Technology,Department of Computer Science,Stockholm,Sweden,SE-10044","institution_ids":["https://openalex.org/I86987016"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I86987016"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"403","last_page":"407"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.9998999834060669,"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":0.9998999834060669,"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/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9970999956130981,"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/T11192","display_name":"Underwater Vehicles and Communication Systems","score":0.9833999872207642,"subfield":{"id":"https://openalex.org/subfields/2212","display_name":"Ocean 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/channel","display_name":"Channel (broadcasting)","score":0.8650708198547363},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6510208249092102},{"id":"https://openalex.org/keywords/parametric-statistics","display_name":"Parametric statistics","score":0.5979328155517578},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.5748183131217957},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.5247823596000671},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.5150163173675537},{"id":"https://openalex.org/keywords/estimation","display_name":"Estimation","score":0.49817657470703125},{"id":"https://openalex.org/keywords/estimation-theory","display_name":"Estimation theory","score":0.41895923018455505},{"id":"https://openalex.org/keywords/transmission-channel","display_name":"Transmission channel","score":0.4171956479549408},{"id":"https://openalex.org/keywords/key","display_name":"Key (lock)","score":0.4142014980316162},{"id":"https://openalex.org/keywords/novelty","display_name":"Novelty","score":0.41387084126472473},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.37381020188331604},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3524836301803589},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.3266231119632721},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.25869303941726685},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.20853570103645325},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.16842281818389893}],"concepts":[{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.8650708198547363},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6510208249092102},{"id":"https://openalex.org/C117251300","wikidata":"https://www.wikidata.org/wiki/Q1849855","display_name":"Parametric statistics","level":2,"score":0.5979328155517578},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.5748183131217957},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.5247823596000671},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.5150163173675537},{"id":"https://openalex.org/C96250715","wikidata":"https://www.wikidata.org/wiki/Q965330","display_name":"Estimation","level":2,"score":0.49817657470703125},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.41895923018455505},{"id":"https://openalex.org/C2983848023","wikidata":"https://www.wikidata.org/wiki/Q733553","display_name":"Transmission channel","level":3,"score":0.4171956479549408},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.4142014980316162},{"id":"https://openalex.org/C2778738651","wikidata":"https://www.wikidata.org/wiki/Q16546687","display_name":"Novelty","level":2,"score":0.41387084126472473},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.37381020188331604},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3524836301803589},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.3266231119632721},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.25869303941726685},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.20853570103645325},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.16842281818389893},{"id":"https://openalex.org/C201995342","wikidata":"https://www.wikidata.org/wiki/Q682496","display_name":"Systems engineering","level":1,"score":0.0},{"id":"https://openalex.org/C27206212","wikidata":"https://www.wikidata.org/wiki/Q34178","display_name":"Theology","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/ieeeconf56349.2022.10051997","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ieeeconf56349.2022.10051997","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2022 56th Asilomar Conference on Signals, Systems, and Computers","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G6771436268","display_name":"Intelligenta tr\u00e5dl\u00f6sa n\u00e4tverk med innovativ antenntopologi","funder_award_id":"FFL18-0277","funder_id":"https://openalex.org/F4320320940","funder_display_name":"Stiftelsen f\u00f6r\u00a0Strategisk Forskning"}],"funders":[{"id":"https://openalex.org/F4320320940","display_name":"Stiftelsen f\u00f6r\u00a0Strategisk Forskning","ror":"https://ror.org/044wr7g58"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W250076511","https://openalex.org/W2162654459","https://openalex.org/W2948573205","https://openalex.org/W2950077417","https://openalex.org/W3010695123","https://openalex.org/W3033425325","https://openalex.org/W3039402952","https://openalex.org/W3121978485","https://openalex.org/W3128409631","https://openalex.org/W3168169223","https://openalex.org/W3202943682","https://openalex.org/W4286569419"],"related_works":["https://openalex.org/W2120595071","https://openalex.org/W2090147078","https://openalex.org/W2610798632","https://openalex.org/W2162067268","https://openalex.org/W2353424004","https://openalex.org/W3139607207","https://openalex.org/W2162925157","https://openalex.org/W2371827284","https://openalex.org/W2978085921","https://openalex.org/W1600683375"],"abstract_inverted_index":{"A":[0,122],"reconfigurable":[1],"intelligent":[2],"surface":[3],"(RIS)":[4],"reflects":[5],"incoming":[6],"signals":[7],"in":[8],"different":[9],"ways":[10],"depending":[11],"on":[12],"the":[13,28,38,46,49,60,75,96,100,105,111,127,139],"phase-shift":[14],"pattern":[15],"assigned":[16],"to":[17,26,45,58,74,99,136],"its":[18],"elements.":[19,80],"The":[20,54],"most":[21],"promising":[22],"use":[23],"case":[24],"is":[25,52,57,125],"aid":[27],"communication":[29],"between":[30],"a":[31,35,41,70,86,119],"base":[32],"station":[33],"and":[34,113],"user":[36,39],"when":[37],"has":[40],"line-of-sight":[42],"(LOS)":[43],"channel":[44,51,61,91,98,112],"RIS":[47,79,115,128],"but":[48],"direct":[50],"blocked.":[53],"main":[55],"challenge":[56],"estimate":[59],"with":[62],"limited":[63],"resources":[64],"because":[65],"non-parametric":[66],"estimation":[67,92,140],"methods":[68],"require":[69],"pilot":[71,132],"length":[72],"proportional":[73],"large":[76],"number":[77],"of":[78],"In":[81],"this":[82],"paper,":[83],"we":[84],"develop":[85],"parametric":[87],"maximum":[88],"likelihood":[89],"(ML)":[90],"framework":[93],"for":[94],"estimating":[95],"LOS":[97],"RIS.":[101],"We":[102],"demonstrate":[103],"that":[104,126],"proposed":[106],"algorithm":[107],"can":[108],"accurately":[109],"obtain":[110],"preferred":[114],"configuration":[116],"using":[117],"only":[118],"few":[120],"pilots.":[121],"key":[123],"novelty":[124],"configurations":[129],"used":[130],"during":[131],"transmission":[133],"are":[134],"selected":[135],"progressively":[137],"improve":[138],"accuracy.":[141]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":6},{"year":2024,"cited_by_count":8},{"year":2023,"cited_by_count":6}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}