{"id":"https://openalex.org/W2170142757","doi":"https://doi.org/10.1109/wcnc.2009.4917624","title":"Channel Estimation Using Time-Multiplexed Pilots in HSUPA Uplink","display_name":"Channel Estimation Using Time-Multiplexed Pilots in HSUPA Uplink","publication_year":2009,"publication_date":"2009-04-01","ids":{"openalex":"https://openalex.org/W2170142757","doi":"https://doi.org/10.1109/wcnc.2009.4917624","mag":"2170142757"},"language":"en","primary_location":{"id":"doi:10.1109/wcnc.2009.4917624","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2009.4917624","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE Wireless Communications and Networking Conference","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/A5044545345","display_name":"Piyush Kaul","orcid":"https://orcid.org/0000-0003-3117-2377"},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Piyush Kaul","raw_affiliation_strings":["Wireless & Convergence, Aricent Technologies Holdings Limited, Gurgaon, Haryana, India"],"affiliations":[{"raw_affiliation_string":"Wireless & Convergence, Aricent Technologies Holdings Limited, Gurgaon, Haryana, India","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5072327093","display_name":"Anupama Saini","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Anupama Saini","raw_affiliation_strings":["Wireless & Convergence, Aricent Technologies Holdings Limited, Gurgaon, Haryana, India"],"affiliations":[{"raw_affiliation_string":"Wireless & Convergence, Aricent Technologies Holdings Limited, Gurgaon, Haryana, India","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5044545345"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.17719266,"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":"5"},"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":0.9998999834060669,"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/T11233","display_name":"Advanced Adaptive Filtering Techniques","score":0.9991999864578247,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"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/channel","display_name":"Channel (broadcasting)","score":0.6709595322608948},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6637468338012695},{"id":"https://openalex.org/keywords/smoothing","display_name":"Smoothing","score":0.580872654914856},{"id":"https://openalex.org/keywords/granularity","display_name":"Granularity","score":0.5734299421310425},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.5045579671859741},{"id":"https://openalex.org/keywords/multipath-propagation","display_name":"Multipath propagation","score":0.49226680397987366},{"id":"https://openalex.org/keywords/multiplexing","display_name":"Multiplexing","score":0.4464339017868042},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.4387415051460266},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.4215376377105713},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.39729130268096924},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.21263521909713745},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.18571737408638},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.13746991753578186}],"concepts":[{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6709595322608948},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6637468338012695},{"id":"https://openalex.org/C3770464","wikidata":"https://www.wikidata.org/wiki/Q775963","display_name":"Smoothing","level":2,"score":0.580872654914856},{"id":"https://openalex.org/C177774035","wikidata":"https://www.wikidata.org/wiki/Q1246948","display_name":"Granularity","level":2,"score":0.5734299421310425},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.5045579671859741},{"id":"https://openalex.org/C161218011","wikidata":"https://www.wikidata.org/wiki/Q11827794","display_name":"Multipath propagation","level":3,"score":0.49226680397987366},{"id":"https://openalex.org/C19275194","wikidata":"https://www.wikidata.org/wiki/Q222903","display_name":"Multiplexing","level":2,"score":0.4464339017868042},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.4387415051460266},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.4215376377105713},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.39729130268096924},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.21263521909713745},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18571737408638},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.13746991753578186},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/wcnc.2009.4917624","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2009.4917624","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE Wireless Communications and Networking Conference","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"score":0.6600000262260437,"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W2003192648","https://openalex.org/W2085877024","https://openalex.org/W2117295854","https://openalex.org/W2121203842","https://openalex.org/W2139240328","https://openalex.org/W2140308925","https://openalex.org/W2155976554","https://openalex.org/W2162870748"],"related_works":["https://openalex.org/W2931688134","https://openalex.org/W2377919138","https://openalex.org/W2548963335","https://openalex.org/W2378857091","https://openalex.org/W4256502920","https://openalex.org/W103652678","https://openalex.org/W4226090359","https://openalex.org/W2999756192","https://openalex.org/W2059697060","https://openalex.org/W2159941915"],"abstract_inverted_index":{"High":[0],"date":[1],"rates":[2],"of":[3,25,42,49,52,61,71,100,109,128,169,180,187],"up":[4],"to":[5,93,142,145,154],"5.76":[6],"Mbps":[7],"with":[8,112,160,173,184],"spreading":[9],"factors":[10],"as":[11,13,27,37,59,114,116],"low":[12],"2":[14,117],"are":[15,34,57,79,166],"supported":[16],"in":[17,80,87],"high":[18,94],"speed":[19],"uplink":[20],"packet":[21],"access":[22],"(HSUPA)":[23],"channels":[24,91],"UMTS,":[26],"specified":[28],"by":[29],"3GPP.":[30],"Receivers":[31],"for":[32,68,90],"WCDMA":[33],"usually":[35],"implemented":[36],"Rake":[38],"receivers":[39,45],"or":[40],"variants":[41],"it.":[43],"Such":[44],"require":[46],"accurate":[47,107],"estimation":[48,70,108,130,189],"complex":[50,73,121],"gains":[51],"multipaths":[53],"received.":[54],"Pilot":[55],"symbols":[56,78],"provided":[58],"part":[60],"DPCCH":[62],"channel":[63,101,110,129,158,188],"and":[64],"can":[65],"be":[66,143],"used":[67],"pilot-aided":[69],"multipath":[72],"gains.":[74],"However":[75],"the":[76,97,106,150,157,181],"pilot":[77],"time-multiplexed":[81],"form":[82],"i.e.":[83],"not":[84],"transmitted":[85],"continuously":[86],"time.":[88],"Also,":[89],"corresponding":[92],"vehicular":[95],"speeds,":[96],"coherence":[98],"time":[99,152],"is":[102,190],"very":[103],"low.":[104],"Hence":[105],"taps":[111],"granularity":[113],"fine":[115,161],"chips":[118],"becomes":[119],"a":[120,126,167],"task.":[122],"We":[123],"present":[124],"here":[125],"method":[127,138,183],"based":[131],"on":[132,176],"interference-compensated":[133],"cubic":[134],"smoothing":[135,164],"splines.":[136],"This":[137],"has":[139],"been":[140],"found":[141],"robust":[144],"additive":[146],"noise,":[147],"while":[148],"at":[149],"same":[151],"able":[153],"closely":[155],"track":[156],"variations":[159],"granularity.":[162],"The":[163],"splines":[165],"variant":[168],"least-squares":[170],"splines,":[171],"but":[172],"added":[174],"constraints":[175],"smoothness.":[177],"A":[178],"comparison":[179],"proposed":[182],"alternative":[185],"methods":[186],"also":[191],"presented.":[192]},"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}