{"id":"https://openalex.org/W4414539996","doi":"https://doi.org/10.1109/icc52391.2025.11161730","title":"Three-Phase Channel Estimation for RIS-Aided MIMO mmWave Systems with Direct Channels","display_name":"Three-Phase Channel Estimation for RIS-Aided MIMO mmWave Systems with Direct Channels","publication_year":2025,"publication_date":"2025-06-08","ids":{"openalex":"https://openalex.org/W4414539996","doi":"https://doi.org/10.1109/icc52391.2025.11161730"},"language":"en","primary_location":{"id":"doi:10.1109/icc52391.2025.11161730","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icc52391.2025.11161730","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ICC 2025 - IEEE International Conference on Communications","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/A5087119689","display_name":"Taihao Zhang","orcid":"https://orcid.org/0000-0003-2834-5644"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Taihao Zhang","raw_affiliation_strings":["Southeast University,Nanjing,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southeast University,Nanjing,China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5075696071","display_name":"Cunhua Pan","orcid":"https://orcid.org/0000-0001-5286-7958"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Cunhua Pan","raw_affiliation_strings":["Southeast University,Nanjing,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southeast University,Nanjing,China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113433956","display_name":"Hong Ren","orcid":"https://orcid.org/0000-0002-3477-1087"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Hong Ren","raw_affiliation_strings":["Southeast University,Nanjing,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southeast University,Nanjing,China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5029002143","display_name":"Jiangzhou Wang","orcid":"https://orcid.org/0000-0003-0881-3594"},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jiangzhou Wang","raw_affiliation_strings":["Southeast University,Nanjing,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southeast University,Nanjing,China","institution_ids":["https://openalex.org/I76569877"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I76569877"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"6850","last_page":"6855"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.9990000128746033,"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/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.9990000128746033,"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/T10262","display_name":"Microwave Engineering and Waveguides","score":0.9976999759674072,"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/T10187","display_name":"Radio Frequency Integrated Circuit Design","score":0.9966999888420105,"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/channel","display_name":"Channel (broadcasting)","score":0.7143999934196472},{"id":"https://openalex.org/keywords/phase","display_name":"Phase (matter)","score":0.6061000227928162},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.49779999256134033},{"id":"https://openalex.org/keywords/subspace-topology","display_name":"Subspace topology","score":0.4880000054836273},{"id":"https://openalex.org/keywords/signal","display_name":"SIGNAL (programming language)","score":0.47600001096725464},{"id":"https://openalex.org/keywords/projection","display_name":"Projection (relational algebra)","score":0.4032999873161316},{"id":"https://openalex.org/keywords/joint","display_name":"Joint (building)","score":0.39649999141693115},{"id":"https://openalex.org/keywords/component","display_name":"Component (thermodynamics)","score":0.39640000462532043},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.3564000129699707}],"concepts":[{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.7143999934196472},{"id":"https://openalex.org/C44280652","wikidata":"https://www.wikidata.org/wiki/Q104837","display_name":"Phase (matter)","level":2,"score":0.6061000227928162},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5934000015258789},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.49779999256134033},{"id":"https://openalex.org/C32834561","wikidata":"https://www.wikidata.org/wiki/Q660730","display_name":"Subspace topology","level":2,"score":0.4880000054836273},{"id":"https://openalex.org/C2779843651","wikidata":"https://www.wikidata.org/wiki/Q7390335","display_name":"SIGNAL (programming language)","level":2,"score":0.47600001096725464},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4438000023365021},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.4187000095844269},{"id":"https://openalex.org/C57493831","wikidata":"https://www.wikidata.org/wiki/Q3134666","display_name":"Projection (relational algebra)","level":2,"score":0.4032999873161316},{"id":"https://openalex.org/C18555067","wikidata":"https://www.wikidata.org/wiki/Q8375051","display_name":"Joint (building)","level":2,"score":0.39649999141693115},{"id":"https://openalex.org/C168167062","wikidata":"https://www.wikidata.org/wiki/Q1117970","display_name":"Component (thermodynamics)","level":2,"score":0.39640000462532043},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.3564000129699707},{"id":"https://openalex.org/C154399039","wikidata":"https://www.wikidata.org/wiki/Q1780921","display_name":"Orthogonal complement","level":3,"score":0.3352999985218048},{"id":"https://openalex.org/C2778112365","wikidata":"https://www.wikidata.org/wiki/Q3511065","display_name":"Sequence (biology)","level":2,"score":0.33090001344680786},{"id":"https://openalex.org/C134786449","wikidata":"https://www.wikidata.org/wiki/Q3391255","display_name":"Planar","level":2,"score":0.3228999972343445},{"id":"https://openalex.org/C17137986","wikidata":"https://www.wikidata.org/wiki/Q215067","display_name":"Orthogonality","level":2,"score":0.3224000036716461},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.31790000200271606},{"id":"https://openalex.org/C2775980084","wikidata":"https://www.wikidata.org/wiki/Q4771249","display_name":"Planar array","level":2,"score":0.3102000057697296},{"id":"https://openalex.org/C112313634","wikidata":"https://www.wikidata.org/wiki/Q7886648","display_name":"Complement (music)","level":5,"score":0.3093000054359436},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.30720001459121704},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.3027999997138977},{"id":"https://openalex.org/C57489055","wikidata":"https://www.wikidata.org/wiki/Q190046","display_name":"Ellipsoid","level":2,"score":0.30230000615119934},{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.2644999921321869},{"id":"https://openalex.org/C175694140","wikidata":"https://www.wikidata.org/wiki/Q980329","display_name":"Orthographic projection","level":2,"score":0.2590000033378601},{"id":"https://openalex.org/C2777121530","wikidata":"https://www.wikidata.org/wiki/Q7512739","display_name":"Signal subspace","level":4,"score":0.2581999897956848},{"id":"https://openalex.org/C104267543","wikidata":"https://www.wikidata.org/wiki/Q208163","display_name":"Signal processing","level":3,"score":0.257099986076355}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/icc52391.2025.11161730","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icc52391.2025.11161730","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ICC 2025 - IEEE International Conference on Communications","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G7208476803","display_name":null,"funder_award_id":"62201137,62331023","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W3039402952","https://openalex.org/W3043220753","https://openalex.org/W3094327823","https://openalex.org/W3133878048","https://openalex.org/W3178081691","https://openalex.org/W3180206688","https://openalex.org/W4287887619","https://openalex.org/W4312051188","https://openalex.org/W4403391452"],"related_works":[],"abstract_inverted_index":{"In":[0,97,123],"this":[1],"paper,":[2],"a":[3],"three-phase":[4,56],"joint":[5],"direct":[6,33,95,157,162,171],"and":[7,41,69,137,164,189],"cascaded":[8,89,175,195],"channel":[9,90,188],"estimation":[10,113],"strategy":[11,57],"is":[12,58],"proposed":[13,202],"for":[14,111],"reconfigurable":[15],"intelligent":[16],"surface":[17],"(RIS)-aided":[18],"multi-user":[19],"(MU)":[20],"multiple-input":[21],"multipleoutput":[22],"(MIMO)":[23],"millimeter":[24],"wave":[25],"(mmWave)":[26],"systems":[27],"with":[28,46,133],"the":[29,32,39,42,54,61,65,70,81,88,94,102,112,120,128,134,139,144,149,153,156,161,170,174,180,186,190,194,201],"existence":[30],"of":[31,53,64,114,116,119,130,148,152,155,182,185,193],"channels.":[34,96,176,196],"The":[35,51],"base":[36],"station":[37],"(BS),":[38],"users":[40],"RIS":[43,71,82],"are":[44],"equipped":[45],"uniform":[47],"planar":[48],"array":[49],"(UPA).":[50],"effectiveness":[52],"devised":[55],"contingent":[59],"upon":[60],"meticulous":[62],"design":[63],"pilot":[66],"signal":[67,109],"sequence":[68],"phase":[72,83],"shift":[73,84],"vectors.":[74],"Specifically,":[75],"in":[76],"Phase":[77,98,124],"I,":[78],"by":[79],"reversing":[80],"vectors,":[85],"we":[86,100,126,178],"remove":[87],"components":[91,163],"to":[92,106,143,173],"estimate":[93,179],"II,":[99],"employ":[101],"orthogonal":[103,145],"subspace":[104],"projection":[105],"obtain":[107],"equivalent":[108],"matrices":[110],"angles":[115,181],"departure":[117],"(AoDs)":[118],"user-RIS":[121],"channel.":[122],"III,":[125],"combine":[127],"signals":[129],"time":[131],"slots":[132],"same":[135],"pilots":[136],"project":[138],"obtained":[140],"measurement":[141],"matrix":[142],"complement":[146],"space":[147],"component":[150],"consisting":[151],"portion":[154],"channel,":[158],"which":[159],"removes":[160],"thus":[165],"prevents":[166],"error":[167],"propagation":[168],"from":[169],"channels":[172],"Then,":[177],"arrival":[183],"(AoAs)":[184],"RIS-BS":[187],"remaining":[191],"parameters":[192],"Simulation":[197],"results":[198],"show":[199],"that":[200],"method":[203],"outperforms":[204],"existing":[205],"methods.":[206]},"counts_by_year":[],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}