{"id":"https://openalex.org/W4400111417","doi":"https://doi.org/10.1109/twc.2024.3417612","title":"Hierarchical MTC User Activity Detection and Channel Estimation With Unknown Spatial Covariance","display_name":"Hierarchical MTC User Activity Detection and Channel Estimation With Unknown Spatial Covariance","publication_year":2024,"publication_date":"2024-06-28","ids":{"openalex":"https://openalex.org/W4400111417","doi":"https://doi.org/10.1109/twc.2024.3417612"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2024.3417612","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2024.3417612","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","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":true,"oa_status":"hybrid","oa_url":"https://doi.org/10.1109/twc.2024.3417612","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5069609009","display_name":"Hamza Djelouat","orcid":"https://orcid.org/0000-0002-1627-0158"},"institutions":[{"id":"https://openalex.org/I98381234","display_name":"University of Oulu","ror":"https://ror.org/03yj89h83","country_code":"FI","type":"education","lineage":["https://openalex.org/I98381234"]}],"countries":["FI"],"is_corresponding":true,"raw_author_name":"Hamza Djelouat","raw_affiliation_strings":["Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland"],"affiliations":[{"raw_affiliation_string":"Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland","institution_ids":["https://openalex.org/I98381234"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5055050168","display_name":"Mikko J. Sillanp\u00e4\u00e4","orcid":"https://orcid.org/0000-0003-2808-2768"},"institutions":[{"id":"https://openalex.org/I98381234","display_name":"University of Oulu","ror":"https://ror.org/03yj89h83","country_code":"FI","type":"education","lineage":["https://openalex.org/I98381234"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Mikko J. Sillanp\u00e4\u00e4","raw_affiliation_strings":["Research Unit of Mathematical Sciences, University of Oulu, Oulu, Finland"],"affiliations":[{"raw_affiliation_string":"Research Unit of Mathematical Sciences, University of Oulu, Oulu, Finland","institution_ids":["https://openalex.org/I98381234"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5056939003","display_name":"Markus Leinonen","orcid":"https://orcid.org/0000-0002-5639-3144"},"institutions":[{"id":"https://openalex.org/I98381234","display_name":"University of Oulu","ror":"https://ror.org/03yj89h83","country_code":"FI","type":"education","lineage":["https://openalex.org/I98381234"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Markus Leinonen","raw_affiliation_strings":["Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland"],"affiliations":[{"raw_affiliation_string":"Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland","institution_ids":["https://openalex.org/I98381234"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5029534229","display_name":"Markku Juntti","orcid":"https://orcid.org/0000-0002-5413-1896"},"institutions":[{"id":"https://openalex.org/I98381234","display_name":"University of Oulu","ror":"https://ror.org/03yj89h83","country_code":"FI","type":"education","lineage":["https://openalex.org/I98381234"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Markku Juntti","raw_affiliation_strings":["Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland"],"affiliations":[{"raw_affiliation_string":"Centre for Wireless Communications-Radio Technologies, University of Oulu, Oulu, Finland","institution_ids":["https://openalex.org/I98381234"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5069609009"],"corresponding_institution_ids":["https://openalex.org/I98381234"],"apc_list":null,"apc_paid":null,"fwci":1.0566,"has_fulltext":false,"cited_by_count":4,"citation_normalized_percentile":{"value":0.77312095,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":97},"biblio":{"volume":"23","issue":"10","first_page":"14620","last_page":"14636"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9677000045776367,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9677000045776367,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/covariance","display_name":"Covariance","score":0.6671222448348999},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6442921757698059},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.48526617884635925},{"id":"https://openalex.org/keywords/estimation","display_name":"Estimation","score":0.4113849699497223},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.38182806968688965},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.34531134366989136},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.3342217803001404},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3161574602127075},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2819526791572571},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.21033242344856262}],"concepts":[{"id":"https://openalex.org/C178650346","wikidata":"https://www.wikidata.org/wiki/Q201984","display_name":"Covariance","level":2,"score":0.6671222448348999},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6442921757698059},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.48526617884635925},{"id":"https://openalex.org/C96250715","wikidata":"https://www.wikidata.org/wiki/Q965330","display_name":"Estimation","level":2,"score":0.4113849699497223},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.38182806968688965},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.34531134366989136},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.3342217803001404},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3161574602127075},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2819526791572571},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.21033242344856262},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C187736073","wikidata":"https://www.wikidata.org/wiki/Q2920921","display_name":"Management","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/twc.2024.3417612","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2024.3417612","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless Communications","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1109/twc.2024.3417612","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2024.3417612","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Transactions on Wireless Communications","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G110801157","display_name":null,"funder_award_id":"340171","funder_id":"https://openalex.org/F4320321108","funder_display_name":"Academy of Finland"},{"id":"https://openalex.org/G5084728419","display_name":"Time-Critical Communications for Internet of Things Systems","funder_award_id":"340171","funder_id":"https://openalex.org/F4320321108","funder_display_name":"Academy of Finland"}],"funders":[{"id":"https://openalex.org/F4320321108","display_name":"Academy of Finland","ror":"https://ror.org/05k73zm37"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":56,"referenced_works":["https://openalex.org/W1636094761","https://openalex.org/W1964699659","https://openalex.org/W1974774078","https://openalex.org/W2020282020","https://openalex.org/W2107861471","https://openalex.org/W2142015064","https://openalex.org/W2146000945","https://openalex.org/W2152279006","https://openalex.org/W2422021507","https://openalex.org/W2490662969","https://openalex.org/W2508393166","https://openalex.org/W2508523245","https://openalex.org/W2561711915","https://openalex.org/W2599969863","https://openalex.org/W2706056020","https://openalex.org/W2770606349","https://openalex.org/W2781773153","https://openalex.org/W2784331297","https://openalex.org/W2799249207","https://openalex.org/W2884034421","https://openalex.org/W2889115845","https://openalex.org/W2890736047","https://openalex.org/W2948231597","https://openalex.org/W2961179947","https://openalex.org/W2979317621","https://openalex.org/W2981917204","https://openalex.org/W3001370401","https://openalex.org/W3027993135","https://openalex.org/W3034904013","https://openalex.org/W3080292365","https://openalex.org/W3080804940","https://openalex.org/W3081876597","https://openalex.org/W3100164193","https://openalex.org/W3103578910","https://openalex.org/W3111933838","https://openalex.org/W3120440980","https://openalex.org/W3135158731","https://openalex.org/W3154741957","https://openalex.org/W3160247632","https://openalex.org/W3184901653","https://openalex.org/W3193685497","https://openalex.org/W3212219855","https://openalex.org/W3212673851","https://openalex.org/W4200630525","https://openalex.org/W4249757966","https://openalex.org/W4285297491","https://openalex.org/W4288388718","https://openalex.org/W4290715637","https://openalex.org/W4292363360","https://openalex.org/W4296558691","https://openalex.org/W4313126930","https://openalex.org/W4321021207","https://openalex.org/W4372259852","https://openalex.org/W6640231202","https://openalex.org/W6676805969","https://openalex.org/W6735450280"],"related_works":["https://openalex.org/W2576994247","https://openalex.org/W2788344745","https://openalex.org/W2608353378","https://openalex.org/W1922851888","https://openalex.org/W2062336688","https://openalex.org/W4249206767","https://openalex.org/W2563559453","https://openalex.org/W2910677864","https://openalex.org/W2382330008","https://openalex.org/W2046078371"],"abstract_inverted_index":{"This":[0],"paper":[1],"addresses":[2],"the":[3,16,43,65,71,84,98,104,112,129,140,150,161,173,179,191,196],"joint":[4],"user":[5,34],"identification":[6],"and":[7,59,76,122],"channel":[8],"estimation":[9,120],"(JUICE)":[10],"problem":[11,121,163],"in":[12],"machine-type":[13],"communications":[14],"under":[15],"practical":[17],"spatially":[18],"correlated":[19],"channels":[20],"model":[21,83],"with":[22,32,49,103,144],"unknown":[23],"covariance":[24],"matrices.":[25],"Furthermore,":[26],"we":[27,68,90,110,138],"consider":[28],"an":[29,38,156],"MTC":[30],"network":[31],"hierarchical":[33],"activity":[35,53,87,193],"patterns":[36],"following":[37],"event-triggered":[39],"traffic":[40],"mode.":[41],"Therein":[42],"users":[44],"are":[45],"distributed":[46],"over":[47],"clusters":[48],"a":[50,78,92,115,117,124,145,165],"structured":[51,85],"sporadic":[52],"behavior":[54,194],"that":[55,159],"exhibits":[56],"both":[57],"cluster-level":[58],"intra-cluster":[60],"sparsity":[61],"patterns.":[62],"To":[63],"solve":[64],"JUICE":[66,113],"problem,":[67],"first":[69],"leverage":[70],"concept":[72],"of":[73,133,167,195],"strong":[74,141],"priors":[75],"propose":[77,123],"hierarchical-sparsity-inducing":[79],"spike-and-slab":[80,142],"prior":[81,143,147],"to":[82],"sparse":[86,192],"pattern.":[88],"Subsequently,":[89],"derive":[91,155],"Bayesian":[93],"inference":[94],"scheme":[95],"by":[96,178],"coupling":[97],"expectation":[99,105],"propagation":[100],"(EP)":[101],"algorithm":[102,158],"maximization":[106],"(EM)":[107],"framework.":[108],"Second,":[109],"reformulate":[111],"as":[114,182,184],"maximum":[116],"posteriori":[118],"(MAP)":[119],"computationally-efficient":[125],"solution":[126],"based":[127,148],"on":[128,149,190],"alternating":[130],"direction":[131],"method":[132],"multipliers":[134],"(ADMM).":[135],"More":[136],"precisely,":[137],"relax":[139],"cluster-sparsity-promoting":[146],"long-sum":[151],"penalty.":[152],"We":[153],"then":[154],"ADMM":[157],"solves":[160],"MAP":[162],"through":[164],"sequence":[166],"closed-form":[168],"updates.":[169],"Numerical":[170],"results":[171],"highlight":[172],"significant":[174],"performance":[175],"gains":[176],"obtained":[177],"proposed":[180],"algorithms,":[181],"well":[183],"their":[185],"robustness":[186],"against":[187],"various":[188],"assumptions":[189],"users.":[197]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":1}],"updated_date":"2026-03-03T08:47:05.690250","created_date":"2025-10-10T00:00:00"}
