{"id":"https://openalex.org/W2066205097","doi":"https://doi.org/10.1109/jsac.2014.1403005","title":"Energy-Efficient Spectrum Access in Cognitive Radios","display_name":"Energy-Efficient Spectrum Access in Cognitive Radios","publication_year":2014,"publication_date":"2014-02-20","ids":{"openalex":"https://openalex.org/W2066205097","doi":"https://doi.org/10.1109/jsac.2014.1403005","mag":"2066205097"},"language":"en","primary_location":{"id":"doi:10.1109/jsac.2014.1403005","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jsac.2014.1403005","pdf_url":null,"source":{"id":"https://openalex.org/S90422530","display_name":"IEEE Journal on Selected Areas in Communications","issn_l":"0733-8716","issn":["0733-8716","1558-0008"],"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 Journal on Selected Areas in 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":"https://openalex.org/A5029055653","display_name":"Cong Xiong","orcid":"https://orcid.org/0000-0002-9657-0117"},"institutions":[{"id":"https://openalex.org/I130701444","display_name":"Georgia Institute of Technology","ror":"https://ror.org/01zkghx44","country_code":"US","type":"education","lineage":["https://openalex.org/I130701444"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Cong Xiong","raw_affiliation_strings":["Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA"],"affiliations":[{"raw_affiliation_string":"Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]},{"raw_affiliation_string":"Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100366043","display_name":"Lu Lu","orcid":"https://orcid.org/0000-0003-0337-2005"},"institutions":[{"id":"https://openalex.org/I130701444","display_name":"Georgia Institute of Technology","ror":"https://ror.org/01zkghx44","country_code":"US","type":"education","lineage":["https://openalex.org/I130701444"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Lu Lu","raw_affiliation_strings":["Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA"],"affiliations":[{"raw_affiliation_string":"Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]},{"raw_affiliation_string":"Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5039289964","display_name":"Geoffrey Ye Li","orcid":"https://orcid.org/0000-0002-7894-2415"},"institutions":[{"id":"https://openalex.org/I130701444","display_name":"Georgia Institute of Technology","ror":"https://ror.org/01zkghx44","country_code":"US","type":"education","lineage":["https://openalex.org/I130701444"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Geoffrey Ye Li","raw_affiliation_strings":["Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA"],"affiliations":[{"raw_affiliation_string":"Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]},{"raw_affiliation_string":"Sch. of Electr. & Comput. Eng.,, Georgia Inst. of Technol., Atlanta, GA, USA","institution_ids":["https://openalex.org/I130701444"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5029055653"],"corresponding_institution_ids":["https://openalex.org/I130701444"],"apc_list":null,"apc_paid":null,"fwci":16.551,"has_fulltext":false,"cited_by_count":66,"citation_normalized_percentile":{"value":0.99304528,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":91,"max":100},"biblio":{"volume":"32","issue":"3","first_page":"550","last_page":"562"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10579","display_name":"Cognitive Radio Networks and Spectrum Sensing","score":1.0,"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/T10579","display_name":"Cognitive Radio Networks and Spectrum Sensing","score":1.0,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9997000098228455,"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/T11873","display_name":"PAPR reduction in OFDM","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"}}],"keywords":[{"id":"https://openalex.org/keywords/cognitive-radio","display_name":"Cognitive radio","score":0.8373781442642212},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6925678849220276},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.6862316131591797},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.585837185382843},{"id":"https://openalex.org/keywords/efficient-energy-use","display_name":"Efficient energy use","score":0.5723710060119629},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.5626954436302185},{"id":"https://openalex.org/keywords/heuristic","display_name":"Heuristic","score":0.5619311928749084},{"id":"https://openalex.org/keywords/optimization-problem","display_name":"Optimization problem","score":0.5094533562660217},{"id":"https://openalex.org/keywords/relaxation","display_name":"Relaxation (psychology)","score":0.4590439200401306},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiple-access","display_name":"Orthogonal frequency-division multiple access","score":0.44507938623428345},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.23258528113365173},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.22840097546577454},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.21360331773757935},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.19707897305488586}],"concepts":[{"id":"https://openalex.org/C149946192","wikidata":"https://www.wikidata.org/wiki/Q3235733","display_name":"Cognitive radio","level":3,"score":0.8373781442642212},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6925678849220276},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.6862316131591797},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.585837185382843},{"id":"https://openalex.org/C2742236","wikidata":"https://www.wikidata.org/wiki/Q924713","display_name":"Efficient energy use","level":2,"score":0.5723710060119629},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.5626954436302185},{"id":"https://openalex.org/C173801870","wikidata":"https://www.wikidata.org/wiki/Q201413","display_name":"Heuristic","level":2,"score":0.5619311928749084},{"id":"https://openalex.org/C137836250","wikidata":"https://www.wikidata.org/wiki/Q984063","display_name":"Optimization problem","level":2,"score":0.5094533562660217},{"id":"https://openalex.org/C2776029896","wikidata":"https://www.wikidata.org/wiki/Q3935810","display_name":"Relaxation (psychology)","level":2,"score":0.4590439200401306},{"id":"https://openalex.org/C2775907427","wikidata":"https://www.wikidata.org/wiki/Q2697649","display_name":"Orthogonal frequency-division multiple access","level":4,"score":0.44507938623428345},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.23258528113365173},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.22840097546577454},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.21360331773757935},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.19707897305488586},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.0},{"id":"https://openalex.org/C77805123","wikidata":"https://www.wikidata.org/wiki/Q161272","display_name":"Social psychology","level":1,"score":0.0},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.0},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.0},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/jsac.2014.1403005","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jsac.2014.1403005","pdf_url":null,"source":{"id":"https://openalex.org/S90422530","display_name":"IEEE Journal on Selected Areas in Communications","issn_l":"0733-8716","issn":["0733-8716","1558-0008"],"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 Journal on Selected Areas in Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/7","score":0.8999999761581421,"display_name":"Affordable and clean energy"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W1505348331","https://openalex.org/W2014833368","https://openalex.org/W2019698800","https://openalex.org/W2034490776","https://openalex.org/W2071707134","https://openalex.org/W2106749358","https://openalex.org/W2107241872","https://openalex.org/W2107725774","https://openalex.org/W2119952207","https://openalex.org/W2126087318","https://openalex.org/W2127821383","https://openalex.org/W2129265278","https://openalex.org/W2129380197","https://openalex.org/W2134396534","https://openalex.org/W2164631123","https://openalex.org/W2168078104","https://openalex.org/W4239256746","https://openalex.org/W4250589301"],"related_works":["https://openalex.org/W3118536199","https://openalex.org/W3168365631","https://openalex.org/W3016860855","https://openalex.org/W1979349579","https://openalex.org/W2559182294","https://openalex.org/W2296212174","https://openalex.org/W1572087604","https://openalex.org/W2106576529","https://openalex.org/W4315777602","https://openalex.org/W3044746003"],"abstract_inverted_index":{"Cognitive":[0],"radio":[1],"(CR)":[2],"and":[3,18,50,55,60,75,86,115,119,134,155,170,247],"energy-efficient":[4,28,194,222],"design":[5],"have":[6,157],"emerged":[7],"as":[8],"two":[9],"promising":[10],"techniques":[11],"to":[12,69,89,124,180,196,212],"achieve":[13],"high":[14],"spectrum":[15,30,102,149,223,234],"efficiency":[16,20],"(SE)":[17],"energy":[19],"(EE),":[21],"respectively.":[22],"In":[23],"this":[24],"paper,":[25],"we":[26,83,105,206],"study":[27],"opportunistic":[29],"access":[31,103,150,224,235],"strategies":[32,225],"for":[33,57,79,93,143],"an":[34,80,167],"orthogonal":[35],"frequency":[36],"division":[37],"multiplexing":[38],"(OFDM)-based":[39],"CR":[40],"network":[41],"with":[42,230],"multiple":[43],"secondary":[44],"users":[45],"(SUs).":[46],"Both":[47],"worst":[48],"EE":[49,52,112,228],"average":[51],"are":[53,76],"considered":[54],"optimized":[56],"different":[58],"emphases":[59],"application":[61],"scenarios.":[62],"Since":[63],"the":[64,91,99,108,126,164,182,189,193,199,202,221,231,238,245],"original":[65],"optimization":[66],"issues":[67],"belong":[68],"nonconvex":[70],"integer":[71],"combinatorial":[72],"fractional":[73],"program":[74],"essentially":[77],"NP-hard":[78,154],"optimal":[81,127,184],"solution,":[82],"use":[84],"continuous":[85],"convex":[87,135],"relaxation":[88],"modify":[90],"problems":[92],"somewhat":[94],"better":[95],"mathematical":[96],"tractability.":[97],"For":[98],"relaxed":[100,147],"worst-EE-based":[101],"problem,":[104],"first":[106,162],"demonstrate":[107],"joint":[109],"quasiconcavity":[110],"of":[111,192,201],"on":[113,130],"subchannel":[114],"power":[116],"allocation":[117],"matrices":[118],"then":[120,187],"develop":[121,139,207],"a":[122,140,172,208,214],"framework":[123],"find":[125,181,213],"solution":[128],"based":[129,176],"efficient":[131],"root":[132],"finding":[133],"optimization.":[136],"We":[137,161,186],"also":[138],"low-complexity":[141,209,239],"alternative":[142],"suboptimal":[144,215,240],"solution.":[145,185,216],"The":[146],"average-EE-based":[148],"problem":[151,165],"is":[152],"still":[153],"may":[156],"many":[158],"local":[159],"optima.":[160],"transform":[163],"into":[166],"equivalent":[168],"form":[169],"introduce":[171],"general":[173],"concave":[174],"envelope":[175],"branch-and-bound":[177],"(B&B)":[178],"approach":[179,211],"global":[183],"exploit":[188],"underlying":[190],"properties":[191],"transmission":[195],"speed":[197],"up":[198],"convergence":[200],"B&B":[203],"approach.":[204],"Besides,":[205],"heuristic":[210],"Simulation":[217],"results":[218],"show":[219],"that":[220],"significantly":[226],"boost":[227],"compared":[229],"conventional":[232],"spectral-efficient":[233],"ones":[236],"while":[237],"approaches":[241],"can":[242],"well":[243],"balance":[244],"performance":[246],"complexity.":[248]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":5},{"year":2017,"cited_by_count":13},{"year":2016,"cited_by_count":16},{"year":2015,"cited_by_count":13},{"year":2014,"cited_by_count":6}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
