{"id":"https://openalex.org/W2338920776","doi":"https://doi.org/10.1109/tcomm.2016.2558186","title":"IQ Imbalance in Multiuser Systems: Channel Estimation and Compensation","display_name":"IQ Imbalance in Multiuser Systems: Channel Estimation and Compensation","publication_year":2016,"publication_date":"2016-04-25","ids":{"openalex":"https://openalex.org/W2338920776","doi":"https://doi.org/10.1109/tcomm.2016.2558186","mag":"2338920776"},"language":"en","primary_location":{"id":"doi:10.1109/tcomm.2016.2558186","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2016.2558186","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"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 Transactions on Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://pureadmin.qub.ac.uk/ws/files/29973230/IQ_imbalanceJournal.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5066444755","display_name":"Nikolaos Kolomvakis","orcid":"https://orcid.org/0000-0002-1011-789X"},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Nikolaos Kolomvakis","raw_affiliation_strings":["Department of Signals and Systems, Chalmers University of Technology, Gothenburg, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Signals and Systems, Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035876091","display_name":"Michail Matthaiou","orcid":"https://orcid.org/0000-0001-9235-7741"},"institutions":[{"id":"https://openalex.org/I126231945","display_name":"Queen's University Belfast","ror":"https://ror.org/00hswnk62","country_code":"GB","type":"education","lineage":["https://openalex.org/I126231945"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Michail Matthaiou","raw_affiliation_strings":["School of Electronics, Electrical Engineering and Computer Science, Queen\u2019s University Belfast, Belfast, U.K","School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Belfast, U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electronics, Electrical Engineering and Computer Science, Queen\u2019s University Belfast, Belfast, U.K","institution_ids":["https://openalex.org/I126231945"]},{"raw_affiliation_string":"School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Belfast, U.K","institution_ids":["https://openalex.org/I126231945"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5012139897","display_name":"Mikael Coldrey","orcid":"https://orcid.org/0000-0002-0241-6371"},"institutions":[{"id":"https://openalex.org/I1306339040","display_name":"Ericsson (Sweden)","ror":"https://ror.org/05a7rhx54","country_code":"SE","type":"company","lineage":["https://openalex.org/I1306339040"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Mikael Coldrey","raw_affiliation_strings":["Ericsson Research, Gothenburg, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ericsson Research, Gothenburg, Sweden","institution_ids":["https://openalex.org/I1306339040"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":4.2767,"has_fulltext":true,"cited_by_count":64,"citation_normalized_percentile":{"value":0.94571982,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":94,"max":99},"biblio":{"volume":"64","issue":"7","first_page":"3039","last_page":"3051"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9998999834060669,"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":0.9998999834060669,"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/T11409","display_name":"Advanced Wireless Network Optimization","score":0.9975000023841858,"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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9944000244140625,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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/rayleigh-fading","display_name":"Rayleigh fading","score":0.685068666934967},{"id":"https://openalex.org/keywords/fading","display_name":"Fading","score":0.6760135889053345},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.625191867351532},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.6095044016838074},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.5793383121490479},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.5609024167060852},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.5187326073646545},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.4997742176055908},{"id":"https://openalex.org/keywords/signal-to-noise-ratio","display_name":"Signal-to-noise ratio (imaging)","score":0.41681334376335144},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3940165042877197},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.3652990162372589},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3403106927871704},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.326002299785614},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.18071696162223816},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.16412806510925293}],"concepts":[{"id":"https://openalex.org/C56985126","wikidata":"https://www.wikidata.org/wiki/Q854039","display_name":"Rayleigh fading","level":4,"score":0.685068666934967},{"id":"https://openalex.org/C81978471","wikidata":"https://www.wikidata.org/wiki/Q1196572","display_name":"Fading","level":3,"score":0.6760135889053345},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.625191867351532},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6095044016838074},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.5793383121490479},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.5609024167060852},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.5187326073646545},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.4997742176055908},{"id":"https://openalex.org/C13944312","wikidata":"https://www.wikidata.org/wiki/Q7512748","display_name":"Signal-to-noise ratio (imaging)","level":2,"score":0.41681334376335144},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3940165042877197},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.3652990162372589},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3403106927871704},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.326002299785614},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.18071696162223816},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.16412806510925293},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C2775924081","wikidata":"https://www.wikidata.org/wiki/Q55608371","display_name":"Control (management)","level":2,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1109/tcomm.2016.2558186","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2016.2558186","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"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 Transactions on Communications","raw_type":"journal-article"},{"id":"pmh:oai:pure.qub.ac.uk/portal:publications/40718b77-127e-4d78-975c-324d256d848c","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/40718b77-127e-4d78-975c-324d256d848c","pdf_url":"https://pureadmin.qub.ac.uk/ws/files/29973230/IQ_imbalanceJournal.pdf","source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Kolomvakis , N , Matthaiou , M & Coldrey , M 2016 , ' IQ Imbalance in Multiuser Systems: Channel Estimation and Compensation ' , IEEE Transactions on Communications , vol. 64 , no. 7 . https://doi.org/10.1109/TCOMM.2016.2558186","raw_type":"article"},{"id":"pmh:oai:publications.lib.chalmers.se:234639","is_oa":false,"landing_page_url":"http://publications.lib.chalmers.se/publication/234639-iq-imbalance-in-multiuser-systems-channel-estimation-and-compensation","pdf_url":null,"source":{"id":"https://openalex.org/S4377196470","display_name":"Chalmers Publication Library (Chalmers University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66862912","host_organization_name":"Chalmers University of Technology","host_organization_lineage":["https://openalex.org/I66862912"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text.Article.Journal.PeerReviewed"},{"id":"pmh:oai:research.chalmers.se:234639","is_oa":false,"landing_page_url":"https://research.chalmers.se/en/publication/234639","pdf_url":null,"source":{"id":"https://openalex.org/S4306402469","display_name":"Chalmers Research (Chalmers University of Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I66862912","host_organization_name":"Chalmers University of Technology","host_organization_lineage":["https://openalex.org/I66862912"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":null}],"best_oa_location":{"id":"pmh:oai:pure.qub.ac.uk/portal:publications/40718b77-127e-4d78-975c-324d256d848c","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/40718b77-127e-4d78-975c-324d256d848c","pdf_url":"https://pureadmin.qub.ac.uk/ws/files/29973230/IQ_imbalanceJournal.pdf","source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Kolomvakis , N , Matthaiou , M & Coldrey , M 2016 , ' IQ Imbalance in Multiuser Systems: Channel Estimation and Compensation ' , IEEE Transactions on Communications , vol. 64 , no. 7 . https://doi.org/10.1109/TCOMM.2016.2558186","raw_type":"article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2338920776.pdf","grobid_xml":"https://content.openalex.org/works/W2338920776.grobid-xml"},"referenced_works_count":36,"referenced_works":["https://openalex.org/W250076511","https://openalex.org/W1488435683","https://openalex.org/W1965392255","https://openalex.org/W1971443733","https://openalex.org/W1987826945","https://openalex.org/W1999833500","https://openalex.org/W2005470419","https://openalex.org/W2029693587","https://openalex.org/W2072184935","https://openalex.org/W2084304524","https://openalex.org/W2089121898","https://openalex.org/W2095329107","https://openalex.org/W2102171442","https://openalex.org/W2104621895","https://openalex.org/W2106929598","https://openalex.org/W2114945762","https://openalex.org/W2116994946","https://openalex.org/W2122421777","https://openalex.org/W2128513990","https://openalex.org/W2136162940","https://openalex.org/W2136907755","https://openalex.org/W2141682101","https://openalex.org/W2142238976","https://openalex.org/W2147601077","https://openalex.org/W2151144578","https://openalex.org/W2153766915","https://openalex.org/W2154259636","https://openalex.org/W2156379232","https://openalex.org/W2320703891","https://openalex.org/W2343589627","https://openalex.org/W2404291566","https://openalex.org/W3100399470","https://openalex.org/W3106282754","https://openalex.org/W6647232389","https://openalex.org/W6704588446","https://openalex.org/W6713680782"],"related_works":["https://openalex.org/W2116044594","https://openalex.org/W2101999641","https://openalex.org/W1503152075","https://openalex.org/W301676527","https://openalex.org/W2052600062","https://openalex.org/W2124541664","https://openalex.org/W289296924","https://openalex.org/W2122920812","https://openalex.org/W2109988226","https://openalex.org/W2545273393"],"abstract_inverted_index":{"In":[0,21,45],"this":[1],"paper,":[2],"we":[3,23,54,158,211],"consider":[4],"the":[5,25,32,61,67,69,74,76,81,92,117,126,132,145,176,182,196,206,219],"uplink":[6],"of":[7,27,34,71,78,91,125,131,144,205,208,221],"a":[8,56,86,106,141],"single-cell":[9],"multi-user":[10],"single-input":[11],"multiple-output":[12,95],"(MU-SIMO)":[13],"system":[14],"with":[15,37,154,171],"in-phase":[16],"and":[17,64,99,104,121,173,193],"quadrature-phase":[18],"imbalance":[19],"(IQI).":[20],"particular,":[22],"investigate":[24,159],"effect":[26,220],"receive":[28],"(RX)":[29],"IQI":[30,50,79,100,108,118,172,201],"on":[31,80,116],"performance":[33,130],"MU-SIMO":[35],"systems":[36,170],"large":[38],"antenna":[39],"arrays":[40],"employing":[41],"maximum-ratio":[42],"combining":[43],"receivers.":[44],"order":[46],"to":[47,200,218],"study":[48],"how":[49,160],"affects":[51],"channel":[52,58,97,127],"estimation,":[53],"derive":[55],"new":[57],"estimator":[59,90],"for":[60],"IQI-impaired":[62],"model":[63],"show":[65,174,212],"that":[66,175,195,213],"higher":[68,75],"value":[70],"signal-to-noise":[72],"ratio,":[73],"impact":[77],"spectral":[82],"efficiency":[83],"(SE).":[84],"Moreover,":[85],"novel":[87],"pilot-based":[88],"joint":[89],"augmented":[93],"multiple-input":[94],"(MIMO)":[96],"matrix":[98],"coefficients":[101],"is":[102,111,114,123,136,202,216],"described,":[103],"then,":[105],"low-complexity":[107],"compensation":[109,134],"scheme":[110,135],"proposed,":[112],"which":[113],"based":[115],"coefficients'":[119],"estimation":[120],"it":[122],"independent":[124,204],"gain.":[128],"The":[129],"proposed":[133],"analytically":[137],"evaluated":[138],"by":[139,187],"deriving":[140,188],"tractable":[142],"approximation":[143],"ergodic":[146],"SE":[147,178,197],"assuming":[148],"transmission":[149],"over":[150],"Rayleigh":[151],"fading":[152],"channels":[153],"large-scale":[155],"fading.":[156],"Furthermore,":[157],"many":[161],"mobile":[162],"stations":[163],"should":[164],"be":[165],"scheduled":[166],"in":[167],"massive":[168,214],"MIMO":[169,215],"highest":[177],"loss":[179,198],"occurs":[180],"at":[181],"optimal":[183],"operating":[184],"point.":[185],"Finally,":[186],"asymptotic":[189],"power":[190],"scaling":[191],"laws":[192],"proving":[194],"due":[199],"asymptotically":[203],"number":[207],"BS":[209],"antennas,":[210],"resilient":[217],"RX":[222],"IQI.":[223]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":4},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":13},{"year":2020,"cited_by_count":8},{"year":2019,"cited_by_count":10},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":5},{"year":2016,"cited_by_count":4}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}