{"id":"https://openalex.org/W3133094988","doi":"https://doi.org/10.1109/globecom42002.2020.9347974","title":"Channel Feedback for Reconfigurable Intelligent Surface Assisted Wireless Communications","display_name":"Channel Feedback for Reconfigurable Intelligent Surface Assisted Wireless Communications","publication_year":2020,"publication_date":"2020-12-01","ids":{"openalex":"https://openalex.org/W3133094988","doi":"https://doi.org/10.1109/globecom42002.2020.9347974","mag":"3133094988"},"language":"en","primary_location":{"id":"doi:10.1109/globecom42002.2020.9347974","is_oa":false,"landing_page_url":"https://doi.org/10.1109/globecom42002.2020.9347974","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2020 - 2020 IEEE Global Communications Conference","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/A5061209570","display_name":"Decai Shen","orcid":"https://orcid.org/0000-0002-3813-5096"},"institutions":[{"id":"https://openalex.org/I99065089","display_name":"Tsinghua University","ror":"https://ror.org/03cve4549","country_code":"CN","type":"education","lineage":["https://openalex.org/I99065089"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Decai Shen","raw_affiliation_strings":["Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing, China","institution_ids":["https://openalex.org/I99065089"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5081869164","display_name":"Linglong Dai","orcid":"https://orcid.org/0000-0002-4250-7315"},"institutions":[{"id":"https://openalex.org/I99065089","display_name":"Tsinghua University","ror":"https://ror.org/03cve4549","country_code":"CN","type":"education","lineage":["https://openalex.org/I99065089"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Linglong Dai","raw_affiliation_strings":["Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing, China","institution_ids":["https://openalex.org/I99065089"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I99065089"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":15,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"5"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":1.0,"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":1.0,"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":0.9972000122070312,"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/T10069","display_name":"Antenna Design and Analysis","score":0.9966999888420105,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace 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/telecommunications-link","display_name":"Telecommunications link","score":0.7796690464019775},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7515106797218323},{"id":"https://openalex.org/keywords/channel-state-information","display_name":"Channel state information","score":0.7161662578582764},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.7054599523544312},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.6504403352737427},{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.6365790367126465},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6056170463562012},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.5591127872467041},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.4831044673919678},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.4574126899242401},{"id":"https://openalex.org/keywords/user-equipment","display_name":"User equipment","score":0.4541579484939575},{"id":"https://openalex.org/keywords/duplex","display_name":"Duplex (building)","score":0.4366590976715088},{"id":"https://openalex.org/keywords/coherence-time","display_name":"Coherence time","score":0.42221567034721375},{"id":"https://openalex.org/keywords/coherence","display_name":"Coherence (philosophical gambling strategy)","score":0.3577132225036621},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.2335376739501953},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.05313122272491455}],"concepts":[{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7796690464019775},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7515106797218323},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.7161662578582764},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.7054599523544312},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.6504403352737427},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.6365790367126465},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6056170463562012},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.5591127872467041},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.4831044673919678},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.4574126899242401},{"id":"https://openalex.org/C2781327853","wikidata":"https://www.wikidata.org/wiki/Q3552547","display_name":"User equipment","level":3,"score":0.4541579484939575},{"id":"https://openalex.org/C99611785","wikidata":"https://www.wikidata.org/wiki/Q6453233","display_name":"Duplex (building)","level":3,"score":0.4366590976715088},{"id":"https://openalex.org/C47091857","wikidata":"https://www.wikidata.org/wiki/Q4118612","display_name":"Coherence time","level":3,"score":0.42221567034721375},{"id":"https://openalex.org/C2781181686","wikidata":"https://www.wikidata.org/wiki/Q4226068","display_name":"Coherence (philosophical gambling strategy)","level":2,"score":0.3577132225036621},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.2335376739501953},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.05313122272491455},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C552990157","wikidata":"https://www.wikidata.org/wiki/Q7430","display_name":"DNA","level":2,"score":0.0},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/globecom42002.2020.9347974","is_oa":false,"landing_page_url":"https://doi.org/10.1109/globecom42002.2020.9347974","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2020 - 2020 IEEE Global Communications Conference","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G1450532556","display_name":null,"funder_award_id":"61722109","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G1801636125","display_name":null,"funder_award_id":"2020YFB1805005","funder_id":"https://openalex.org/F4320335777","funder_display_name":"National Key Research and Development Program of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320329860","display_name":"National Science and Technology Major Project","ror":null},{"id":"https://openalex.org/F4320335777","display_name":"National Key Research and Development Program of China","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":11,"referenced_works":["https://openalex.org/W2074120933","https://openalex.org/W2604698298","https://openalex.org/W2950077417","https://openalex.org/W2963182751","https://openalex.org/W2964005248","https://openalex.org/W2993316576","https://openalex.org/W2995726768","https://openalex.org/W3010176898","https://openalex.org/W3011952645","https://openalex.org/W3013192867","https://openalex.org/W4288335807"],"related_works":["https://openalex.org/W2088352174","https://openalex.org/W4286695888","https://openalex.org/W3084132786","https://openalex.org/W4327661444","https://openalex.org/W2161061958","https://openalex.org/W2034991012","https://openalex.org/W3215829489","https://openalex.org/W4226210192","https://openalex.org/W4307482262","https://openalex.org/W2165786772"],"abstract_inverted_index":{"Reconfigurable":[0],"intelligent":[1],"surface":[2],"(RIS)":[3],"has":[4,39],"recently":[5],"received":[6],"increasing":[7],"interest":[8],"due":[9],"to":[10,40,142,150],"the":[11,15,33,44,49,53,56,64,73,81,88,94,118,125,135,143,151,155,174,178,186],"superiority":[12],"of":[13,67,77,134],"changing":[14],"wireless":[16,30],"propagation":[17],"environments":[18],"intelligently.":[19],"Channel":[20],"feedback":[21,108],"is":[22],"essential":[23],"in":[24,87,93],"frequency":[25],"division":[26],"duplex":[27],"(FDD)":[28],"RIS-assisted":[29],"communications,":[31],"since":[32],"downlink":[34,119],"channel":[35,100,107,115],"state":[36],"information":[37],"(CSI)":[38],"be":[41,122,139,159,182,192],"acquired":[42],"by":[43,145,167,172],"base":[45],"station":[46],"(BS)":[47],"for":[48,114],"joint":[50],"beamforming":[51],"at":[52],"BS":[54,144],"and":[55,128],"RIS.":[57],"In":[58],"this":[59,99],"paper,":[60],"we":[61,102],"first":[62],"investigate":[63],"single-structured":[65,152],"sparsity":[66],"RIS":[68],"channel,":[69],"which":[70],"means":[71],"that":[72],"angular-domain":[74],"sparse":[75],"channels":[76,137],"different":[78,168],"users":[79],"share":[80],"same":[82],"non-zero":[83],"element":[84],"indices":[85],"only":[86,146],"column":[89],"dimension,":[90],"but":[91],"not":[92],"row":[95],"dimension.":[96],"Based":[97],"on":[98],"characteristic,":[101],"then":[103],"propose":[104],"a":[105,111,163],"dimension-reduced":[106],"scheme":[109],"with":[110,162],"low":[112,165],"overhead":[113,166,180],"feedback.":[116],"Specifically,":[117],"CSI":[120,127,133,157],"can":[121,138,158,181,190],"decomposed":[123],"into":[124],"structured":[126,132],"unstructured":[129,156],"CSI.":[130],"The":[131],"multi-user":[136],"fed":[140,160],"back":[141,161],"one":[147],"user":[148],"according":[149],"sparsity,":[153],"while":[154,185],"fairly":[164],"users,":[169],"respectively.":[170],"Moreover,":[171],"utilizing":[173],"angle":[175],"coherence":[176],"time,":[177],"per-user":[179,188],"reduced":[183],"further,":[184],"near-optimal":[187],"rate":[189],"still":[191],"guaranteed.":[193]},"counts_by_year":[{"year":2025,"cited_by_count":7},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}
