{"id":"https://openalex.org/W3145939970","doi":"https://doi.org/10.1109/tcomm.2009.4784366","title":"A coded convolutional spreading CDMA system with turbo equalization for downlink transmission over a frequency selective fading channel","display_name":"A coded convolutional spreading CDMA system with turbo equalization for downlink transmission over a frequency selective fading channel","publication_year":2009,"publication_date":"2009-02-01","ids":{"openalex":"https://openalex.org/W3145939970","doi":"https://doi.org/10.1109/tcomm.2009.4784366","mag":"3145939970"},"language":"en","primary_location":{"id":"doi:10.1109/tcomm.2009.4784366","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2009.4784366","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 Transactions on 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/A5024223511","display_name":"Nalin S. Weerasinghe","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Nalin Weerasinghe","raw_affiliation_strings":["Schlumberger K.K., Sagamihara, Kanagawa, Japan"],"affiliations":[{"raw_affiliation_string":"Schlumberger K.K., Sagamihara, Kanagawa, Japan","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102029184","display_name":"Suguru Watanabe","orcid":null},"institutions":[{"id":"https://openalex.org/I4210098539","display_name":"Mitaka Kohki (Japan)","ror":"https://ror.org/00ehgcp58","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210098539"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Suguru Watanabe","raw_affiliation_strings":["Japan Radio Company Limited, Mitaka, Tokyo, Japan"],"affiliations":[{"raw_affiliation_string":"Japan Radio Company Limited, Mitaka, Tokyo, Japan","institution_ids":["https://openalex.org/I4210098539"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103259573","display_name":"Takeshi Hashimoto","orcid":"https://orcid.org/0000-0003-2668-1759"},"institutions":[{"id":"https://openalex.org/I20529979","display_name":"University of Electro-Communications","ror":"https://ror.org/02x73b849","country_code":"JP","type":"education","lineage":["https://openalex.org/I20529979"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Takeshi Hashimoto","raw_affiliation_strings":["University of Electro-Communications, Chofu, Tokyo, Japan"],"affiliations":[{"raw_affiliation_string":"University of Electro-Communications, Chofu, Tokyo, Japan","institution_ids":["https://openalex.org/I20529979"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102327174","display_name":"Shuichi Itoh","orcid":null},"institutions":[{"id":"https://openalex.org/I20529979","display_name":"University of Electro-Communications","ror":"https://ror.org/02x73b849","country_code":"JP","type":"education","lineage":["https://openalex.org/I20529979"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Shuichi Itoh","raw_affiliation_strings":["University of Electro-Communications, Chofu, Tokyo, Japan"],"affiliations":[{"raw_affiliation_string":"University of Electro-Communications, Chofu, Tokyo, Japan","institution_ids":["https://openalex.org/I20529979"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5024223511"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":1.515,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.84629785,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"57","issue":"2","first_page":"573","last_page":"582"},"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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9908999800682068,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/fading","display_name":"Fading","score":0.7228758335113525},{"id":"https://openalex.org/keywords/cyclic-prefix","display_name":"Cyclic prefix","score":0.6033757925033569},{"id":"https://openalex.org/keywords/code-division-multiple-access","display_name":"Code division multiple access","score":0.5869640707969666},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5801857113838196},{"id":"https://openalex.org/keywords/rake-receiver","display_name":"Rake receiver","score":0.5557827949523926},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.546825110912323},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.532427966594696},{"id":"https://openalex.org/keywords/maximal-ratio-combining","display_name":"Maximal-ratio combining","score":0.5308701992034912},{"id":"https://openalex.org/keywords/multipath-propagation","display_name":"Multipath propagation","score":0.4922458231449127},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.4461739659309387},{"id":"https://openalex.org/keywords/multiuser-detection","display_name":"Multiuser detection","score":0.4430628716945648},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.42923614382743835},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.42838752269744873},{"id":"https://openalex.org/keywords/time-diversity","display_name":"Time diversity","score":0.4168817400932312},{"id":"https://openalex.org/keywords/convolutional-code","display_name":"Convolutional code","score":0.4111829102039337},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.25491034984588623},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.24434274435043335},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.20320692658424377},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.18847113847732544}],"concepts":[{"id":"https://openalex.org/C81978471","wikidata":"https://www.wikidata.org/wiki/Q1196572","display_name":"Fading","level":3,"score":0.7228758335113525},{"id":"https://openalex.org/C2778775284","wikidata":"https://www.wikidata.org/wiki/Q5198224","display_name":"Cyclic prefix","level":4,"score":0.6033757925033569},{"id":"https://openalex.org/C47696715","wikidata":"https://www.wikidata.org/wiki/Q233394","display_name":"Code division multiple access","level":2,"score":0.5869640707969666},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5801857113838196},{"id":"https://openalex.org/C23486597","wikidata":"https://www.wikidata.org/wiki/Q1125543","display_name":"Rake receiver","level":4,"score":0.5557827949523926},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.546825110912323},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.532427966594696},{"id":"https://openalex.org/C86024645","wikidata":"https://www.wikidata.org/wiki/Q6795632","display_name":"Maximal-ratio combining","level":4,"score":0.5308701992034912},{"id":"https://openalex.org/C161218011","wikidata":"https://www.wikidata.org/wiki/Q11827794","display_name":"Multipath propagation","level":3,"score":0.4922458231449127},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.4461739659309387},{"id":"https://openalex.org/C2777104032","wikidata":"https://www.wikidata.org/wiki/Q16324514","display_name":"Multiuser detection","level":3,"score":0.4430628716945648},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.42923614382743835},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.42838752269744873},{"id":"https://openalex.org/C2779512956","wikidata":"https://www.wikidata.org/wiki/Q7805300","display_name":"Time diversity","level":4,"score":0.4168817400932312},{"id":"https://openalex.org/C157899210","wikidata":"https://www.wikidata.org/wiki/Q1395022","display_name":"Convolutional code","level":3,"score":0.4111829102039337},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.25491034984588623},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.24434274435043335},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.20320692658424377},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18847113847732544}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/tcomm.2009.4784366","is_oa":false,"landing_page_url":"https://doi.org/10.1109/tcomm.2009.4784366","pdf_url":null,"source":{"id":"https://openalex.org/S196647941","display_name":"IEEE Transactions on Communications","issn_l":"0090-6778","issn":["0090-6778","1558-0857"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","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 Transactions on Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":0.8100000023841858}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":39,"referenced_works":["https://openalex.org/W114239384","https://openalex.org/W413036620","https://openalex.org/W1525427380","https://openalex.org/W1535682870","https://openalex.org/W1571774520","https://openalex.org/W1588126996","https://openalex.org/W2003665483","https://openalex.org/W2045407304","https://openalex.org/W2069304655","https://openalex.org/W2085374342","https://openalex.org/W2101657744","https://openalex.org/W2102099405","https://openalex.org/W2102251435","https://openalex.org/W2107855478","https://openalex.org/W2107959360","https://openalex.org/W2108656301","https://openalex.org/W2112976436","https://openalex.org/W2115229528","https://openalex.org/W2116343857","https://openalex.org/W2117761304","https://openalex.org/W2128696174","https://openalex.org/W2130786508","https://openalex.org/W2137359459","https://openalex.org/W2145928725","https://openalex.org/W2148314740","https://openalex.org/W2149558421","https://openalex.org/W2152600927","https://openalex.org/W2159157773","https://openalex.org/W2161723231","https://openalex.org/W2165942867","https://openalex.org/W2168142490","https://openalex.org/W2430949799","https://openalex.org/W2504764514","https://openalex.org/W4248676392","https://openalex.org/W6604659485","https://openalex.org/W6631563313","https://openalex.org/W6631995732","https://openalex.org/W6635223881","https://openalex.org/W6680446220"],"related_works":["https://openalex.org/W1496196145","https://openalex.org/W1513922550","https://openalex.org/W1765051513","https://openalex.org/W2085360484","https://openalex.org/W2145158620","https://openalex.org/W2147376117","https://openalex.org/W1543115813","https://openalex.org/W1960094248","https://openalex.org/W2374733637","https://openalex.org/W2483937009"],"abstract_inverted_index":{"In":[0],"this":[1,177],"paper,":[2],"a":[3,142],"coded":[4,51,103,205],"convolutional":[5],"spreading":[6],"codedivision":[7],"multiaccess":[8],"with":[9,16,35,48,97,101,106,199],"cyclic":[10],"prefix":[11],"(CS-CDMA/CP)":[12],"system":[13,67,105,111,140,165,194],"in":[14],"conjunction":[15],"iterative":[17,201],"receivers":[18,203],"is":[19,33,80,112,133,185,195],"proposed":[20,84,110,139,164,193],"for":[21,204],"synchronous":[22],"downlink":[23],"transmission":[24],"over":[25,94],"frequency":[26],"selective":[27],"fading":[28],"channels":[29],"and":[30,176],"its":[31],"performance":[32,71,144],"compared":[34,196],"the":[36,49,63,83,89,102,109,119,123,128,138,147,151,158,163,171,180,188,192,200],"uncoded":[37,64],"CS-CDMA/CP":[38],"employing":[39,56],"maximum-likelihood":[40],"sequence":[41,53],"estimation":[42],"(MLSE)":[43],"receiver":[44,189],"as":[45,47],"well":[46],"conventional":[50],"direct":[52],"CDMA":[54],"(DS-CDMA)":[55],"(maximal":[57],"ratio":[58],"combining-)":[59],"MRC-RAKE.":[60],"Contrary":[61],"to":[62],"CSCDMA/":[65],"CP":[66],"which":[68],"suffers":[69],"from":[70,114],"degradation":[72],"at":[73],"low":[74],"signal-to-noise":[75],"power":[76],"ratios":[77],"(SNRs),":[78],"it":[79,184],"demonstrated":[81],"that":[82,137,187],"scheme":[85],"can":[86,166],"attain":[87],"almost":[88],"full":[90],"path":[91],"diversity":[92],"gain":[93],"all":[95],"SNRs":[96],"single-user":[98,107],"complexity.":[99],"Compared":[100],"DS-CDMA":[104,206],"receivers,":[108],"free":[113],"multiuser":[115,202],"interference":[116],"(MUI)":[117],"whenever":[118],"multipath":[120],"delay":[121,154],"of":[122,157,161,191,208],"channel":[124,148,172],"does":[125],"not":[126],"exceed":[127,150],"designed":[129,152],"maximum":[130,153],"delay.":[131],"It":[132],"also":[134],"demonstrated,":[135],"moreover,":[136],"shows":[141],"robust":[143],"even":[145],"if":[146],"length":[149],"slightly.":[155],"Because":[156],"subblock":[159],"structure":[160],"CS-CDMA/CP,":[162],"utilize":[167],"time-diversity":[168],"effects,":[169],"when":[170],"subjects":[173],"fast":[174],"fading,":[175],"greatly":[178],"improves":[179],"resultant":[181],"performance.":[182,210],"Finally,":[183],"shown":[186],"complexity":[190],"quite":[197],"favorably":[198],"systems":[207],"comparable":[209]},"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}