{"id":"https://openalex.org/W3011480931","doi":"https://doi.org/10.1109/apcc47188.2019.9026526","title":"Pilot Power Allocation for Enhancing Channel Estimation Quality in Multi-cell Multi-user Massive MIMO Systems","display_name":"Pilot Power Allocation for Enhancing Channel Estimation Quality in Multi-cell Multi-user Massive MIMO Systems","publication_year":2019,"publication_date":"2019-11-01","ids":{"openalex":"https://openalex.org/W3011480931","doi":"https://doi.org/10.1109/apcc47188.2019.9026526","mag":"3011480931"},"language":"en","primary_location":{"id":"doi:10.1109/apcc47188.2019.9026526","is_oa":false,"landing_page_url":"https://doi.org/10.1109/apcc47188.2019.9026526","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2019 25th Asia-Pacific Conference on Communications (APCC)","raw_type":"proceedings-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/A5041179168","display_name":"Hieu Dao","orcid":"https://orcid.org/0000-0003-2940-807X"},"institutions":[{"id":"https://openalex.org/I40542001","display_name":"University of Ulsan","ror":"https://ror.org/02c2f8975","country_code":"KR","type":"education","lineage":["https://openalex.org/I40542001"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Hieu Trong Dao","raw_affiliation_strings":["Dept. of Electrical Engineering, University of Ulsan, Ulsan, Korea"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dept. of Electrical Engineering, University of Ulsan, Ulsan, Korea","institution_ids":["https://openalex.org/I40542001"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100430160","display_name":"Sunghwan Kim","orcid":"https://orcid.org/0000-0003-1762-5915"},"institutions":[{"id":"https://openalex.org/I40542001","display_name":"University of Ulsan","ror":"https://ror.org/02c2f8975","country_code":"KR","type":"education","lineage":["https://openalex.org/I40542001"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Sunghwan Kim","raw_affiliation_strings":["Dept. of Electrical Engineering, University of Ulsan, Ulsan, Korea"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dept. of Electrical Engineering, University of Ulsan, Ulsan, Korea","institution_ids":["https://openalex.org/I40542001"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.1211,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.51068098,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"207","last_page":"210"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":1.0,"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":1.0,"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":0.9994999766349792,"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/T11392","display_name":"Energy Harvesting in Wireless Networks","score":0.9993000030517578,"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":0.7526180148124695},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.7168885469436646},{"id":"https://openalex.org/keywords/nondeterministic-algorithm","display_name":"Nondeterministic algorithm","score":0.699231743812561},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6589385271072388},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.6033134460449219},{"id":"https://openalex.org/keywords/mean-squared-error","display_name":"Mean squared error","score":0.601932942867279},{"id":"https://openalex.org/keywords/minimum-mean-square-error","display_name":"Minimum mean square error","score":0.5810242891311646},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4907594621181488},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.4902820885181427},{"id":"https://openalex.org/keywords/polynomial","display_name":"Polynomial","score":0.4521316885948181},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.4387401044368744},{"id":"https://openalex.org/keywords/minification","display_name":"Minification","score":0.4361984133720398},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.27179327607154846},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.17601099610328674},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.16687196493148804}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7526180148124695},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.7168885469436646},{"id":"https://openalex.org/C176181172","wikidata":"https://www.wikidata.org/wiki/Q3490301","display_name":"Nondeterministic algorithm","level":2,"score":0.699231743812561},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6589385271072388},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.6033134460449219},{"id":"https://openalex.org/C139945424","wikidata":"https://www.wikidata.org/wiki/Q1940696","display_name":"Mean squared error","level":2,"score":0.601932942867279},{"id":"https://openalex.org/C90652560","wikidata":"https://www.wikidata.org/wiki/Q11091747","display_name":"Minimum mean square error","level":3,"score":0.5810242891311646},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4907594621181488},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.4902820885181427},{"id":"https://openalex.org/C90119067","wikidata":"https://www.wikidata.org/wiki/Q43260","display_name":"Polynomial","level":2,"score":0.4521316885948181},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.4387401044368744},{"id":"https://openalex.org/C147764199","wikidata":"https://www.wikidata.org/wiki/Q6865248","display_name":"Minification","level":2,"score":0.4361984133720398},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.27179327607154846},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.17601099610328674},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.16687196493148804},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.0},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.0},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/apcc47188.2019.9026526","is_oa":false,"landing_page_url":"https://doi.org/10.1109/apcc47188.2019.9026526","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2019 25th Asia-Pacific Conference on Communications (APCC)","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":12,"referenced_works":["https://openalex.org/W250076511","https://openalex.org/W1969648546","https://openalex.org/W1986586714","https://openalex.org/W2105392125","https://openalex.org/W2136644341","https://openalex.org/W2147601077","https://openalex.org/W2293467174","https://openalex.org/W2309773735","https://openalex.org/W2408034629","https://openalex.org/W2558454036","https://openalex.org/W2782968070","https://openalex.org/W4250589301"],"related_works":["https://openalex.org/W184826316","https://openalex.org/W3132573772","https://openalex.org/W149527954","https://openalex.org/W2075897667","https://openalex.org/W2907746047","https://openalex.org/W4311950697","https://openalex.org/W3125536267","https://openalex.org/W2274645452","https://openalex.org/W2538872159","https://openalex.org/W4390584137"],"abstract_inverted_index":{"In":[0],"this":[1],"paper,":[2],"we":[3,28,49,87,131],"investigate":[4],"pilot":[5,107],"power":[6,108],"allocation":[7],"in":[8,99,153,165],"multi-cell":[9],"multi-user":[10],"massive":[11],"MIMO":[12],"systems":[13],"for":[14,62,114],"enhancing":[15],"channel":[16,25,54,82,154],"estimation":[17,26,55,83,97,155],"quality.":[18],"it":[19,120],"is":[20,115,121],"known":[21],"that,":[22,86],"with":[23,102,141],"good":[24],"quality,":[27,156],"can":[29],"detect":[30],"signals":[31],"more":[32],"accurately.":[33],"To":[34],"improve":[35],"the":[36,47,53,63,94,100,126,137,147,160,166],"throughput,":[37],"instead":[38],"of":[39,46,96,104,149,159],"focusing":[40],"directly":[41],"on":[42,51],"spectral":[43],"efficiency":[44],"(SE)":[45],"system,":[48,161],"focus":[50],"improving":[52],"quality":[56],"by":[57],"creating":[58],"a":[59,89,105],"closed-form":[60],"formula":[61],"normalized":[64],"mean":[65,78],"squared":[66,79],"error":[67,80,98],"(NMSE)":[68],"between":[69],"true":[70],"and":[71,119,162],"estimated":[72],"channel.":[73],"We":[74],"consider":[75],"well-known":[76],"minimum":[77,163],"(MMSE)":[81],"method.":[84],"After":[85],"propose":[88,132],"minimization":[90],"problem":[91,113],"to":[92,124,135],"minimize":[93],"summation":[95],"system":[101],"constrain":[103],"maximum":[106],"per":[109],"user.":[110],"The":[111],"optimization":[112],"nondeterministic":[116],"polynomial-time":[117],"hard":[118,123],"very":[122],"find":[125,136],"global":[127],"solution,":[128],"so":[129],"that":[130],"an":[133],"algorithm":[134],"local":[138],"optimum":[139],"solution":[140],"polynomial":[142],"time.":[143],"Numerical":[144],"results":[145],"show":[146],"advantages":[148],"our":[150],"proposed":[151],"approach":[152],"sum":[157],"SE":[158,164],"system.":[167]},"counts_by_year":[{"year":2021,"cited_by_count":1}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}