{"id":"https://openalex.org/W2126807227","doi":"https://doi.org/10.1109/wcnc.2011.5779131","title":"Joint optimization in multi-user MIMO-OFDMA relay-enhanced cellular networks","display_name":"Joint optimization in multi-user MIMO-OFDMA relay-enhanced cellular networks","publication_year":2011,"publication_date":"2011-03-01","ids":{"openalex":"https://openalex.org/W2126807227","doi":"https://doi.org/10.1109/wcnc.2011.5779131","mag":"2126807227"},"language":"en","primary_location":{"id":"doi:10.1109/wcnc.2011.5779131","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2011.5779131","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 IEEE Wireless Communications and Networking 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/A5034159301","display_name":"Lijun Zu","orcid":null},"institutions":[{"id":"https://openalex.org/I116953780","display_name":"Tongji University","ror":"https://ror.org/03rc6as71","country_code":"CN","type":"education","lineage":["https://openalex.org/I116953780"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Lijun Zu","raw_affiliation_strings":["University of Tongji, Shanghai, China","Tongji University, Shanghai, China;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Tongji, Shanghai, China","institution_ids":["https://openalex.org/I116953780"]},{"raw_affiliation_string":"Tongji University, Shanghai, China;","institution_ids":["https://openalex.org/I116953780"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5037098061","display_name":"Yusheng Ji","orcid":"https://orcid.org/0000-0003-4364-8491"},"institutions":[{"id":"https://openalex.org/I184597095","display_name":"National Institute of Informatics","ror":"https://ror.org/04ksd4g47","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1319490839","https://openalex.org/I184597095","https://openalex.org/I4210158934"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yusheng Ji","raw_affiliation_strings":["National Institute of Information, Tokyo, Japan","(National Institute of Informatics, Tokyo, Japan)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Institute of Information, Tokyo, Japan","institution_ids":["https://openalex.org/I184597095"]},{"raw_affiliation_string":"(National Institute of Informatics, Tokyo, Japan)","institution_ids":["https://openalex.org/I184597095"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100402258","display_name":"Liping Wang","orcid":"https://orcid.org/0000-0002-5526-0868"},"institutions":[{"id":"https://openalex.org/I86987016","display_name":"KTH Royal Institute of Technology","ror":"https://ror.org/026vcq606","country_code":"SE","type":"education","lineage":["https://openalex.org/I86987016"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Liping Wang","raw_affiliation_strings":["Royal Institute of Technology, KTH, Sweden","Royal Institute of Technology, (KTH), Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Royal Institute of Technology, KTH, Sweden","institution_ids":["https://openalex.org/I86987016"]},{"raw_affiliation_string":"Royal Institute of Technology, (KTH), Sweden","institution_ids":["https://openalex.org/I86987016"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085713075","display_name":"Lei Zhong","orcid":"https://orcid.org/0000-0002-7937-5379"},"institutions":[{"id":"https://openalex.org/I184597095","display_name":"National Institute of Informatics","ror":"https://ror.org/04ksd4g47","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1319490839","https://openalex.org/I184597095","https://openalex.org/I4210158934"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Lei Zhong","raw_affiliation_strings":["National Institute of Information, Tokyo, Japan","(National Institute of Informatics, Tokyo, Japan)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Institute of Information, Tokyo, Japan","institution_ids":["https://openalex.org/I184597095"]},{"raw_affiliation_string":"(National Institute of Informatics, Tokyo, Japan)","institution_ids":["https://openalex.org/I184597095"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5115589611","display_name":"Fuqiang Liu","orcid":null},"institutions":[{"id":"https://openalex.org/I116953780","display_name":"Tongji University","ror":"https://ror.org/03rc6as71","country_code":"CN","type":"education","lineage":["https://openalex.org/I116953780"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Fuqiang Liu","raw_affiliation_strings":["University of Tongji, Shanghai, China","Tongji University, Shanghai, China;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Tongji, Shanghai, China","institution_ids":["https://openalex.org/I116953780"]},{"raw_affiliation_string":"Tongji University, Shanghai, China;","institution_ids":["https://openalex.org/I116953780"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100338672","display_name":"Ping Wang","orcid":"https://orcid.org/0000-0002-6917-6050"},"institutions":[{"id":"https://openalex.org/I116953780","display_name":"Tongji University","ror":"https://ror.org/03rc6as71","country_code":"CN","type":"education","lineage":["https://openalex.org/I116953780"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ping Wang","raw_affiliation_strings":["University of Tongji, Shanghai, China","Tongji University, Shanghai, China;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"University of Tongji, Shanghai, China","institution_ids":["https://openalex.org/I116953780"]},{"raw_affiliation_string":"Tongji University, Shanghai, China;","institution_ids":["https://openalex.org/I116953780"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5086524620","display_name":"Jing Xu","orcid":"https://orcid.org/0000-0002-9911-1581"},"institutions":[{"id":"https://openalex.org/I4210153300","display_name":"Shanghai Research Center for Wireless Communications","ror":"https://ror.org/04xfd0826","country_code":"CN","type":"facility","lineage":["https://openalex.org/I4210153300"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Jing Xu","raw_affiliation_strings":["Research Center of Wireless Communication, Shanghai, China","Research Center for Wireless Communication, Shanghai, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Research Center of Wireless Communication, Shanghai, China","institution_ids":["https://openalex.org/I4210153300"]},{"raw_affiliation_string":"Research Center for Wireless Communication, Shanghai, China","institution_ids":["https://openalex.org/I4210153300"]}]}],"institutions":[],"countries_distinct_count":3,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.572,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.62097821,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"39","issue":null,"first_page":"13","last_page":"18"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9998000264167786,"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"}},"topics":[{"id":"https://openalex.org/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9998000264167786,"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"}},{"id":"https://openalex.org/T11409","display_name":"Advanced Wireless Network Optimization","score":0.9983000159263611,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9923999905586243,"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/computer-science","display_name":"Computer science","score":0.7732160091400146},{"id":"https://openalex.org/keywords/relay","display_name":"Relay","score":0.6576831340789795},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.5815173387527466},{"id":"https://openalex.org/keywords/resource-allocation","display_name":"Resource allocation","score":0.5427395105361938},{"id":"https://openalex.org/keywords/optimization-problem","display_name":"Optimization problem","score":0.5153200030326843},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.5132501125335693},{"id":"https://openalex.org/keywords/scheduling","display_name":"Scheduling (production processes)","score":0.5086430311203003},{"id":"https://openalex.org/keywords/fading","display_name":"Fading","score":0.47070690989494324},{"id":"https://openalex.org/keywords/frequency-division-multiple-access","display_name":"Frequency-division multiple access","score":0.441719114780426},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.4307508170604706},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiple-access","display_name":"Orthogonal frequency-division multiple access","score":0.4284522235393524},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.3730314373970032},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.3674006164073944},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.2897770404815674},{"id":"https://openalex.org/keywords/power","display_name":"Power (physics)","score":0.27097487449645996},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.2691775858402252},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.14103341102600098},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.11386799812316895}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7732160091400146},{"id":"https://openalex.org/C2778156585","wikidata":"https://www.wikidata.org/wiki/Q174053","display_name":"Relay","level":3,"score":0.6576831340789795},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.5815173387527466},{"id":"https://openalex.org/C29202148","wikidata":"https://www.wikidata.org/wiki/Q287260","display_name":"Resource allocation","level":2,"score":0.5427395105361938},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.5153200030326843},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.5132501125335693},{"id":"https://openalex.org/C206729178","wikidata":"https://www.wikidata.org/wiki/Q2271896","display_name":"Scheduling (production processes)","level":2,"score":0.5086430311203003},{"id":"https://openalex.org/C81978471","wikidata":"https://www.wikidata.org/wiki/Q1196572","display_name":"Fading","level":3,"score":0.47070690989494324},{"id":"https://openalex.org/C2776208322","wikidata":"https://www.wikidata.org/wiki/Q844071","display_name":"Frequency-division multiple access","level":4,"score":0.441719114780426},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.4307508170604706},{"id":"https://openalex.org/C2775907427","wikidata":"https://www.wikidata.org/wiki/Q2697649","display_name":"Orthogonal frequency-division multiple access","level":4,"score":0.4284522235393524},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.3730314373970032},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.3674006164073944},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.2897770404815674},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.27097487449645996},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.2691775858402252},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.14103341102600098},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.11386799812316895},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/wcnc.2011.5779131","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2011.5779131","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2011 IEEE Wireless Communications and Networking Conference","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":27,"referenced_works":["https://openalex.org/W103204726","https://openalex.org/W122553268","https://openalex.org/W1493379323","https://openalex.org/W1576520375","https://openalex.org/W2003025165","https://openalex.org/W2014902591","https://openalex.org/W2034771294","https://openalex.org/W2048679005","https://openalex.org/W2049633694","https://openalex.org/W2097089247","https://openalex.org/W2098136027","https://openalex.org/W2102373032","https://openalex.org/W2110757521","https://openalex.org/W2114524997","https://openalex.org/W2115918064","https://openalex.org/W2117775656","https://openalex.org/W2120249541","https://openalex.org/W2133406626","https://openalex.org/W2133990480","https://openalex.org/W2137191349","https://openalex.org/W2141101607","https://openalex.org/W2166026233","https://openalex.org/W3129711340","https://openalex.org/W6604179135","https://openalex.org/W6604970484","https://openalex.org/W6634442568","https://openalex.org/W7048738093"],"related_works":["https://openalex.org/W2025189274","https://openalex.org/W2126075151","https://openalex.org/W2092365485","https://openalex.org/W1585503616","https://openalex.org/W2004574319","https://openalex.org/W1543564974","https://openalex.org/W2060870071","https://openalex.org/W2224554958","https://openalex.org/W1591771139","https://openalex.org/W1654541684"],"abstract_inverted_index":{"MIMO,":[0],"OFDMA":[1],"and":[2,27,52,74,101,164],"cooperative":[3],"relaying":[4],"are":[5],"the":[6,16,38,91,98,113,134,137,156,168,172,179],"key":[7],"technologies":[8],"in":[9],"future":[10],"wireless":[11],"communication":[12],"systems.":[13],"However,":[14],"under":[15,69],"usage":[17],"of":[18,136,160],"these":[19],"technologies,":[20],"resource":[21,41,64],"allocation":[22,42,65,73],"becomes":[23],"a":[24,62,77,103],"more":[25,149],"crucial":[26],"challenging":[28],"task.":[29],"In":[30],"multi-user":[31],"MIMO-OFDMA":[32],"relay-enhanced":[33],"cellular":[34],"networks,":[35],"we":[36,89,132],"formulate":[37],"optimal":[39],"instantaneous":[40],"problem":[43,94],"including":[44],"user":[45],"group":[46],"selection,":[47,49],"path":[48],"power":[50,72,84,120,145],"allocation,":[51],"subchannel":[53],"scheduling":[54],"to":[55,82,118],"maximize":[56],"system":[57],"capacity.":[58],"We":[59],"first":[60],"propose":[61,102],"low-complex":[63],"algorithm":[66,107,115,170],"named":[67,80,108],"`CP-CP'":[68],"constant":[70],"uniform":[71],"then":[75],"use":[76],"water-filling":[78,106],"method":[79],"`CP-AP'":[81],"allocate":[83,119],"among":[85,124,128,146,152],"transmitting":[86,153],"antennas.":[87],"Moreover,":[88],"solve":[90],"original":[92],"optimization":[93],"efficiently":[95],"by":[96],"using":[97],"Jensen's":[99],"inequality":[100],"modified":[104],"iterative":[105],"`AP-CP'.":[109],"Based":[110],"on":[111],"`AP-CP',":[112],"`AP-AP'":[114,169],"is":[116,148,162],"proposed":[117],"adaptively":[121],"not":[122],"only":[123],"subchannels":[125,147],"but":[126],"also":[127],"multiple":[129],"transmitting.":[130],"Finally,":[131],"compare":[133],"performance":[135],"four":[138],"schemes.":[139],"Our":[140],"results":[141],"show":[142],"that":[143],"allocating":[144],"effective":[150],"than":[151],"antennas":[154],"if":[155],"average":[157],"signal-to-noise":[158],"radio":[159],"users":[161,177],"low,":[163],"vice":[165],"versa.":[166],"Furthermore,":[167],"achieves":[171],"highest":[173],"throughout":[174],"especially":[175],"for":[176],"near":[178],"cell":[180],"edge.":[181]},"counts_by_year":[{"year":2018,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}