{"id":"https://openalex.org/W2129530616","doi":"https://doi.org/10.1109/pimrc.2007.4394646","title":"The Study of Pilot Allocation and Channel Estimation in Downlink OFDMA Systems","display_name":"The Study of Pilot Allocation and Channel Estimation in Downlink OFDMA Systems","publication_year":2007,"publication_date":"2007-01-01","ids":{"openalex":"https://openalex.org/W2129530616","doi":"https://doi.org/10.1109/pimrc.2007.4394646","mag":"2129530616"},"language":"en","primary_location":{"id":"doi:10.1109/pimrc.2007.4394646","is_oa":false,"landing_page_url":"https://doi.org/10.1109/pimrc.2007.4394646","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications","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/A5109234821","display_name":"Hongnian Xing","orcid":null},"institutions":[{"id":"https://openalex.org/I2738502077","display_name":"Nokia (Finland)","ror":"https://ror.org/04pkc8m17","country_code":"FI","type":"company","lineage":["https://openalex.org/I2738502077"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Hongnian Xing","raw_affiliation_strings":["Wireless System Research, Technology Platform, Nokia, Espoo, Finland","Nokia, Espoo"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Wireless System Research, Technology Platform, Nokia, Espoo, Finland","institution_ids":["https://openalex.org/I2738502077"]},{"raw_affiliation_string":"Nokia, Espoo","institution_ids":["https://openalex.org/I2738502077"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5013533865","display_name":"Markku Renfors","orcid":"https://orcid.org/0000-0003-1548-6851"},"institutions":[{"id":"https://openalex.org/I4210133110","display_name":"Tampere University","ror":null,"country_code":"FI","type":null,"lineage":["https://openalex.org/I4210133110"]}],"countries":["FI"],"is_corresponding":false,"raw_author_name":"Markku Renfors","raw_affiliation_strings":["Institute of Communications Engineering, Tampere University of Technology, Tampere, Finland","Institute of Communications Engineering, Tampere University of Technology, Tampere, Finland.#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Communications Engineering, Tampere University of Technology, Tampere, Finland","institution_ids":["https://openalex.org/I4210133110"]},{"raw_affiliation_string":"Institute of Communications Engineering, Tampere University of Technology, Tampere, Finland.#TAB#","institution_ids":["https://openalex.org/I4210133110"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.16144363,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"6"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10125","display_name":"Advanced Wireless Communication Techniques","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/T10125","display_name":"Advanced Wireless Communication Techniques","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/T10575","display_name":"Wireless Communication Networks Research","score":0.9994000196456909,"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":0.9993000030517578,"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/telecommunications-link","display_name":"Telecommunications link","score":0.9021106958389282},{"id":"https://openalex.org/keywords/estimator","display_name":"Estimator","score":0.7006398439407349},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6958715319633484},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6777336001396179},{"id":"https://openalex.org/keywords/wiener-filter","display_name":"Wiener filter","score":0.5402002930641174},{"id":"https://openalex.org/keywords/frequency-division-multiple-access","display_name":"Frequency-division multiple access","score":0.52564537525177},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.5078292489051819},{"id":"https://openalex.org/keywords/channel-allocation-schemes","display_name":"Channel allocation schemes","score":0.44973790645599365},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.39406776428222656},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.3819665014743805},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.24382683634757996},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.2355736792087555},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.23129478096961975},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.18878081440925598},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.12890341877937317},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.0998997688293457}],"concepts":[{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.9021106958389282},{"id":"https://openalex.org/C185429906","wikidata":"https://www.wikidata.org/wiki/Q1130160","display_name":"Estimator","level":2,"score":0.7006398439407349},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6958715319633484},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6777336001396179},{"id":"https://openalex.org/C18537770","wikidata":"https://www.wikidata.org/wiki/Q25523","display_name":"Wiener filter","level":2,"score":0.5402002930641174},{"id":"https://openalex.org/C2776208322","wikidata":"https://www.wikidata.org/wiki/Q844071","display_name":"Frequency-division multiple access","level":4,"score":0.52564537525177},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.5078292489051819},{"id":"https://openalex.org/C114237682","wikidata":"https://www.wikidata.org/wiki/Q5072483","display_name":"Channel allocation schemes","level":3,"score":0.44973790645599365},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.39406776428222656},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.3819665014743805},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.24382683634757996},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.2355736792087555},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.23129478096961975},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18878081440925598},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.12890341877937317},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0998997688293457}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/pimrc.2007.4394646","is_oa":false,"landing_page_url":"https://doi.org/10.1109/pimrc.2007.4394646","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W1596939795","https://openalex.org/W1980409777","https://openalex.org/W2112115917","https://openalex.org/W2119755184","https://openalex.org/W2132437263","https://openalex.org/W2798333393","https://openalex.org/W2913817822","https://openalex.org/W4212888567"],"related_works":["https://openalex.org/W2139049779","https://openalex.org/W2000813696","https://openalex.org/W2169305728","https://openalex.org/W2135095612","https://openalex.org/W2118913882","https://openalex.org/W2161855167","https://openalex.org/W2542868531","https://openalex.org/W2078013232","https://openalex.org/W2136549755","https://openalex.org/W2098761584"],"abstract_inverted_index":{"The":[0,38],"OFDMA":[1,36,93],"technology":[2],"has":[3,54],"been":[4,31,44,55],"proposed":[5,48,81],"as":[6,82],"one":[7,83],"of":[8,22,84],"the":[9,14,20,34,47,85,91],"main":[10],"downlink":[11,35,92],"schemes":[12,89],"for":[13,33,46,90],"B3G":[15],"systems.":[16],"In":[17,51],"this":[18],"paper,":[19],"characteristics":[21],"a":[23,62,76],"Wiener":[24,64],"filter":[25,65],"based":[26],"channel":[27,49,72,77,87],"estimation":[28,88],"scheme":[29],"have":[30,42],"investigated":[32],"system.":[37,94],"basic":[39],"pilot":[40,60],"patterns":[41],"also":[43],"studied":[45],"estimator.":[50],"general,":[52],"it":[53],"shown":[56],"that":[57],"with":[58],"proper":[59],"density,":[61],"2D":[63],"can":[66,79],"provide":[67],"good":[68],"performance":[69],"in":[70],"different":[71],"conditions.":[73],"So":[74],"such":[75],"estimator":[78],"be":[80],"suitable":[86]},"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}