{"id":"https://openalex.org/W4413887104","doi":"https://doi.org/10.1109/twc.2025.3602099","title":"Low-Complexity On-Grid Channel Estimation for Partially-Connected Hybrid XL-MIMO","display_name":"Low-Complexity On-Grid Channel Estimation for Partially-Connected Hybrid XL-MIMO","publication_year":2025,"publication_date":"2025-09-01","ids":{"openalex":"https://openalex.org/W4413887104","doi":"https://doi.org/10.1109/twc.2025.3602099"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2025.3602099","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3602099","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":null,"display_name":"Sunho Kim","orcid":"https://orcid.org/0009-0009-2263-223X"},"institutions":[{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Sunho Kim","raw_affiliation_strings":["Department of Electrical and Computer Engineering and the Institute of New Media and Communications, Seoul National University (SNU), Seoul, South Korea","Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul, Korea"],"raw_orcid":"https://orcid.org/0009-0009-2263-223X","affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering and the Institute of New Media and Communications, Seoul National University (SNU), Seoul, South Korea","institution_ids":["https://openalex.org/I139264467"]},{"raw_affiliation_string":"Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul, Korea","institution_ids":["https://openalex.org/I139264467"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5035102148","display_name":"Wan Choi","orcid":"https://orcid.org/0000-0003-3930-7088"},"institutions":[{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Wan Choi","raw_affiliation_strings":["Department of Electrical and Computer Engineering and the Institute of New Media and Communications, Seoul National University (SNU), Seoul, South Korea","Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul, Korea"],"raw_orcid":"https://orcid.org/0000-0003-3930-7088","affiliations":[{"raw_affiliation_string":"Department of Electrical and Computer Engineering and the Institute of New Media and Communications, Seoul National University (SNU), Seoul, South Korea","institution_ids":["https://openalex.org/I139264467"]},{"raw_affiliation_string":"Department of Electrical and Computer Engineering, Seoul National University (SNU), Seoul, Korea","institution_ids":["https://openalex.org/I139264467"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I139264467"],"apc_list":null,"apc_paid":null,"fwci":0.4626,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.66978987,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":97},"biblio":{"volume":"25","issue":null,"first_page":"3153","last_page":"3169"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9988999962806702,"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":0.9988999962806702,"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":0.995199978351593,"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"}},{"id":"https://openalex.org/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.989300012588501,"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/mimo","display_name":"MIMO","score":0.6513141393661499},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6156842112541199},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.4726789593696594},{"id":"https://openalex.org/keywords/multi-user-mimo","display_name":"Multi-user MIMO","score":0.4474390745162964},{"id":"https://openalex.org/keywords/grid","display_name":"Grid","score":0.44456902146339417},{"id":"https://openalex.org/keywords/precoding","display_name":"Precoding","score":0.4217090606689453},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.31992053985595703},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.24086683988571167}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6513141393661499},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6156842112541199},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.4726789593696594},{"id":"https://openalex.org/C91330434","wikidata":"https://www.wikidata.org/wiki/Q738298","display_name":"Multi-user MIMO","level":4,"score":0.4474390745162964},{"id":"https://openalex.org/C187691185","wikidata":"https://www.wikidata.org/wiki/Q2020720","display_name":"Grid","level":2,"score":0.44456902146339417},{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.4217090606689453},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.31992053985595703},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.24086683988571167},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/twc.2025.3602099","is_oa":false,"landing_page_url":"https://doi.org/10.1109/twc.2025.3602099","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":[{"id":"https://openalex.org/G1938019663","display_name":null,"funder_award_id":"RS-2024-00436923","funder_id":"https://openalex.org/F4320322120","funder_display_name":"National Research Foundation of Korea"}],"funders":[{"id":"https://openalex.org/F4320322120","display_name":"National Research Foundation of Korea","ror":"https://ror.org/013aysd81"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":34,"referenced_works":["https://openalex.org/W1432778544","https://openalex.org/W1997834106","https://openalex.org/W2047024541","https://openalex.org/W2054692642","https://openalex.org/W2111349248","https://openalex.org/W2111953900","https://openalex.org/W2135338342","https://openalex.org/W2137628444","https://openalex.org/W2195833401","https://openalex.org/W2339667469","https://openalex.org/W2622044750","https://openalex.org/W2805231505","https://openalex.org/W2964003927","https://openalex.org/W2995352668","https://openalex.org/W2997786076","https://openalex.org/W3011067038","https://openalex.org/W3022237966","https://openalex.org/W3091752016","https://openalex.org/W3117044336","https://openalex.org/W3213225772","https://openalex.org/W4226370247","https://openalex.org/W4312549913","https://openalex.org/W4312850630","https://openalex.org/W4324291638","https://openalex.org/W4360596735","https://openalex.org/W4364322798","https://openalex.org/W4387414991","https://openalex.org/W4391019688","https://openalex.org/W4396534969","https://openalex.org/W4399282468","https://openalex.org/W4403022968","https://openalex.org/W4403390220","https://openalex.org/W4404057536","https://openalex.org/W4405178888"],"related_works":["https://openalex.org/W2489379490","https://openalex.org/W2545343974","https://openalex.org/W1500439066","https://openalex.org/W2542194775","https://openalex.org/W2182661536","https://openalex.org/W1987031311","https://openalex.org/W2141031289","https://openalex.org/W1969186191","https://openalex.org/W2107228371","https://openalex.org/W1480258634"],"abstract_inverted_index":{"This":[0,105,147],"paper":[1],"addresses":[2],"the":[3,17,58,67,94,100,120,127,132,138,151,164],"challenge":[4],"of":[5,19,166],"channel":[6,32,46,80,96,134,179],"estimation":[7,47,81,106,180],"in":[8,183,190],"extremely":[9],"large-scale":[10],"multiple-input":[11],"multiple-output":[12],"(XL-MIMO)":[13],"systems,":[14,23],"pivotal":[15],"for":[16,49,65,84],"advancement":[18],"6G":[20],"communications.":[21],"XL-MIMO":[22,51,86,178],"characterized":[24],"by":[25,136],"their":[26],"vast":[27],"antenna":[28],"arrays,":[29],"necessitate":[30],"accurate":[31],"state":[33],"information":[34],"(CSI)":[35],"to":[36,57],"leverage":[37],"high":[38,60,152,186],"spatial":[39],"multiplexing":[40],"and":[41,185,189],"beamforming":[42],"gains.":[43],"However,":[44],"conventional":[45],"methods":[48],"near-field":[50,69,85,177],"encounter":[52],"significant":[53,173],"computational":[54,153],"complexity":[55,154],"due":[56],"exceedingly":[59],"parameter":[61],"quantization":[62],"levels":[63],"needed":[64],"estimating":[66,93],"parametric":[68],"channel.":[70],"To":[71],"address":[72],"this,":[73],"we":[74,130],"propose":[75],"a":[76],"low-complexity":[77,169],"two-stage":[78],"on-grid":[79],"algorithm":[82],"designed":[83],"systems.":[87],"The":[88],"first":[89],"stage":[90],"focuses":[91],"on":[92,119],"LoS":[95],"component":[97,135],"while":[98],"treating":[99],"NLoS":[101,133],"paths":[102],"as":[103],"interference.":[104],"is":[107],"accomplished":[108],"through":[109],"an":[110],"alternating":[111],"subarray-wise":[112],"array":[113,195],"gain":[114],"maximization":[115],"(ASAGM)":[116],"approach":[117,148],"based":[118],"piecewise":[121],"outer":[122],"product":[123],"model":[124],"(SOPM).":[125],"In":[126],"second":[128],"stage,":[129],"estimate":[131],"utilizing":[137],"sensing":[139,159],"matrix":[140],"refinement-based":[141],"orthogonal":[142],"matching":[143],"pursuit":[144],"(SMR-OMP)":[145],"algorithm.":[146],"helps":[149],"reduce":[150],"associated":[155],"with":[156],"large-dimensional":[157],"joint":[158],"matrices.":[160],"Simulation":[161],"results":[162],"demonstrate":[163],"effectiveness":[165],"our":[167],"proposed":[168],"method,":[170],"showcasing":[171],"its":[172],"superiority":[174],"over":[175],"existing":[176],"techniques,":[181],"particularly":[182],"intermediate":[184],"SNR":[187],"regimes,":[188],"practical":[191],"scenarios":[192],"involving":[193],"arbitrary":[194],"placements.":[196]},"counts_by_year":[{"year":2026,"cited_by_count":1}],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}
