{"id":"https://openalex.org/W4410950148","doi":"https://doi.org/10.1109/lcomm.2025.3575539","title":"Channel Estimation for Double-RIS-Assisted Multi-User MIMO System in the Presence of Obstructed Links Using Deep Learning","display_name":"Channel Estimation for Double-RIS-Assisted Multi-User MIMO System in the Presence of Obstructed Links Using Deep Learning","publication_year":2025,"publication_date":"2025-06-02","ids":{"openalex":"https://openalex.org/W4410950148","doi":"https://doi.org/10.1109/lcomm.2025.3575539"},"language":"en","primary_location":{"id":"doi:10.1109/lcomm.2025.3575539","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3575539","pdf_url":null,"source":{"id":"https://openalex.org/S147316732","display_name":"IEEE Communications Letters","issn_l":"1089-7798","issn":["1089-7798","1558-2558","2373-7891"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 Communications Letters","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/A5063070122","display_name":"Abdulmajid Lawal","orcid":"https://orcid.org/0000-0002-2583-6387"},"institutions":[{"id":"https://openalex.org/I134085113","display_name":"King Fahd University of Petroleum and Minerals","ror":"https://ror.org/03yez3163","country_code":"SA","type":"education","lineage":["https://openalex.org/I134085113"]}],"countries":["SA"],"is_corresponding":false,"raw_author_name":"Abdulmajid Lawal","raw_affiliation_strings":["Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia"],"raw_orcid":"https://orcid.org/0000-0002-2583-6387","affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]},{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5016405871","display_name":"Azzedine Zerguine","orcid":"https://orcid.org/0000-0002-2621-4969"},"institutions":[{"id":"https://openalex.org/I134085113","display_name":"King Fahd University of Petroleum and Minerals","ror":"https://ror.org/03yez3163","country_code":"SA","type":"education","lineage":["https://openalex.org/I134085113"]}],"countries":["SA"],"is_corresponding":false,"raw_author_name":"Azzedine Zerguine","raw_affiliation_strings":["Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia"],"raw_orcid":"https://orcid.org/0000-0002-2621-4969","affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]},{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5048280041","display_name":"Karim Abed\u2010Meraim","orcid":"https://orcid.org/0000-0003-2652-1923"},"institutions":[{"id":"https://openalex.org/I4210096782","display_name":"Laboratoire Pluridisciplinaire de Recherche en Ing\u00e9nierie des Syst\u00e8mes, M\u00e9canique et Energ\u00e9tique","ror":"https://ror.org/00sbth994","country_code":"FR","type":"facility","lineage":["https://openalex.org/I12449238","https://openalex.org/I4210096782","https://openalex.org/I4210143826"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Karim Abed-Meraim","raw_affiliation_strings":["PRISME Laboratory, University of Orl&#x00E9;ans, Orl&#x00E9;ans, France","PRISME Lab, IUF affiliated with University of Orl&#x00E9;ans, France"],"raw_orcid":"https://orcid.org/0000-0003-2652-1923","affiliations":[{"raw_affiliation_string":"PRISME Laboratory, University of Orl&#x00E9;ans, Orl&#x00E9;ans, France","institution_ids":["https://openalex.org/I4210096782"]},{"raw_affiliation_string":"PRISME Lab, IUF affiliated with University of Orl&#x00E9;ans, France","institution_ids":["https://openalex.org/I4210096782"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5073876438","display_name":"Ali H. Muqaibel","orcid":"https://orcid.org/0000-0001-7865-1987"},"institutions":[{"id":"https://openalex.org/I134085113","display_name":"King Fahd University of Petroleum and Minerals","ror":"https://ror.org/03yez3163","country_code":"SA","type":"education","lineage":["https://openalex.org/I134085113"]}],"countries":["SA"],"is_corresponding":false,"raw_author_name":"Ali Muqaibel","raw_affiliation_strings":["Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia"],"raw_orcid":"https://orcid.org/0000-0001-7865-1987","affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]},{"raw_affiliation_string":"Department of Electrical Engineering and the Center for Communication Systems and Sensing, King Fahd University of Petroleum &#x0026; Minerals (KFUPM), Dhahran, Saudi Arabia","institution_ids":["https://openalex.org/I134085113"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":2645,"currency":"USD","value_usd":2645},"apc_paid":null,"fwci":1.4386,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.80755538,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":96,"max":98},"biblio":{"volume":"29","issue":"8","first_page":"1794","last_page":"1798"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9991999864578247,"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":0.9991999864578247,"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/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.9955999851226807,"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/T11932","display_name":"Wireless Body Area Networks","score":0.992900013923645,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical 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":0.7518362998962402},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.6831195950508118},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6797152161598206},{"id":"https://openalex.org/keywords/estimation","display_name":"Estimation","score":0.4725760221481323},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.4542451798915863},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.3783058822154999},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.3501385748386383},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3452063798904419},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.33230873942375183},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3277939558029175},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.14491716027259827},{"id":"https://openalex.org/keywords/systems-engineering","display_name":"Systems engineering","score":0.13503113389015198}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7518362998962402},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6831195950508118},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6797152161598206},{"id":"https://openalex.org/C96250715","wikidata":"https://www.wikidata.org/wiki/Q965330","display_name":"Estimation","level":2,"score":0.4725760221481323},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.4542451798915863},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.3783058822154999},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3501385748386383},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3452063798904419},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.33230873942375183},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3277939558029175},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.14491716027259827},{"id":"https://openalex.org/C201995342","wikidata":"https://www.wikidata.org/wiki/Q682496","display_name":"Systems engineering","level":1,"score":0.13503113389015198}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/lcomm.2025.3575539","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3575539","pdf_url":null,"source":{"id":"https://openalex.org/S147316732","display_name":"IEEE Communications Letters","issn_l":"1089-7798","issn":["1089-7798","1558-2558","2373-7891"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 Communications Letters","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G214840276","display_name":null,"funder_award_id":"INCS2404","funder_id":"https://openalex.org/F4320322323","funder_display_name":"King Fahd University of Petroleum and Minerals"}],"funders":[{"id":"https://openalex.org/F4320322323","display_name":"King Fahd University of Petroleum and Minerals","ror":"https://ror.org/03yez3163"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W2943928690","https://openalex.org/W2968810373","https://openalex.org/W3015594231","https://openalex.org/W3021564798","https://openalex.org/W3043220753","https://openalex.org/W3096401097","https://openalex.org/W3135509084","https://openalex.org/W3190774574","https://openalex.org/W3217335562","https://openalex.org/W4362683599","https://openalex.org/W4386261892","https://openalex.org/W4392061611","https://openalex.org/W4399766326","https://openalex.org/W4401567870"],"related_works":["https://openalex.org/W2545343974","https://openalex.org/W4291895924","https://openalex.org/W1783583321","https://openalex.org/W2038397443","https://openalex.org/W2576994247","https://openalex.org/W2941374357","https://openalex.org/W2112785353","https://openalex.org/W2026727497","https://openalex.org/W2164866798","https://openalex.org/W1976502299"],"abstract_inverted_index":{"Maximizing":[0],"the":[1,24,35,70,73,84,87,90,96,103,112,121,135],"performance":[2],"of":[3,26,37,76,89,123],"reconfigurable":[4],"intelligent":[5],"surfaces":[6],"(RIS)":[7],"in":[8,23,30,83,106,115,152],"wireless":[9],"communication":[10],"systems":[11],"critically":[12],"depends":[13],"on":[14],"accurate":[15],"channel":[16,38,60,75,126],"estimation.":[17],"This":[18],"challenge":[19],"becomes":[20],"more":[21,43],"pronounced":[22],"presence":[25],"double":[27],"RISs,":[28],"particularly":[29],"severely":[31],"obstructed":[32],"environments,":[33],"where":[34],"number":[36,122],"coefficients":[39,127],"increases":[40],"substantially":[41],"and":[42,82,125],"pilot":[44],"overhead":[45],"is":[46,80,149],"required.":[47],"To":[48],"address":[49],"these":[50],"limitations,":[51],"we":[52],"propose":[53],"a":[54,77,107,116],"deep":[55,137],"learningbased":[56],"two-stage":[57],"dual-reflection":[58,74],"cascaded":[59],"estimation":[61,147],"for":[62],"multi":[63],"users":[64,92],"multiple-input":[65],"multiple-output":[66],"(MIMO)":[67],"system.":[68],"In":[69],"first":[71,104],"stage,":[72,86],"reference":[78,97],"user":[79],"estimated":[81,94],"second":[85,113],"channels":[88],"remaining":[91],"are":[93],"using":[95],"estimate.":[98],"The":[99],"proposed":[100,136],"approach":[101],"operates":[102],"RIS":[105,114],"known":[108],"fixed":[109],"mode,":[110,119],"while":[111],"dynamically":[117],"adjustable":[118],"reducing":[120],"pilots":[124],"to":[128],"be":[129],"estimated.":[130],"Simulation":[131],"results":[132],"demonstrate":[133],"that":[134],"learning":[138],"method":[139],"significantly":[140],"outperforms":[141],"existing":[142],"methods":[143],"as":[144,146],"far":[145],"accuracy":[148],"concerned":[150],"especially":[151],"low":[153],"SNR":[154],"environments.":[155]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":3}],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2025-10-10T00:00:00"}
