{"id":"https://openalex.org/W2118868885","doi":"https://doi.org/10.1109/glocom.2009.5425697","title":"Low-Complexity Algorithm for Log Likelihood Ratios in Coded MIMO-OFDM Communications","display_name":"Low-Complexity Algorithm for Log Likelihood Ratios in Coded MIMO-OFDM Communications","publication_year":2009,"publication_date":"2009-11-01","ids":{"openalex":"https://openalex.org/W2118868885","doi":"https://doi.org/10.1109/glocom.2009.5425697","mag":"2118868885"},"language":"en","primary_location":{"id":"doi:10.1109/glocom.2009.5425697","is_oa":false,"landing_page_url":"https://doi.org/10.1109/glocom.2009.5425697","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference","raw_type":"proceedings-article"},"type":"conference-paper","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/A5035087785","display_name":"Liming Zheng","orcid":"https://orcid.org/0000-0003-1402-1390"},"institutions":[{"id":"https://openalex.org/I114531698","display_name":"Tokyo Institute of Technology","ror":"https://ror.org/0112mx960","country_code":"JP","type":"education","lineage":["https://openalex.org/I114531698"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Liming Zheng","raw_affiliation_strings":["Tokyo Institute of Technology, Meguro, Tokyo, Japan","[Tokyo Institute of Technology, Tokyo, JAPAN]"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tokyo Institute of Technology, Meguro, Tokyo, Japan","institution_ids":["https://openalex.org/I114531698"]},{"raw_affiliation_string":"[Tokyo Institute of Technology, Tokyo, JAPAN]","institution_ids":["https://openalex.org/I114531698"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5090248051","display_name":"Woo Jooin","orcid":null},"institutions":[{"id":"https://openalex.org/I114531698","display_name":"Tokyo Institute of Technology","ror":"https://ror.org/0112mx960","country_code":"JP","type":"education","lineage":["https://openalex.org/I114531698"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Jooin Woo","raw_affiliation_strings":["Tokyo Institute of Technology, Meguro, Tokyo, Japan","[Tokyo Institute of Technology, Tokyo, JAPAN]"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tokyo Institute of Technology, Meguro, Tokyo, Japan","institution_ids":["https://openalex.org/I114531698"]},{"raw_affiliation_string":"[Tokyo Institute of Technology, Tokyo, JAPAN]","institution_ids":["https://openalex.org/I114531698"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082008476","display_name":"Kazuhiko Fukawa","orcid":"https://orcid.org/0000-0003-0611-9398"},"institutions":[{"id":"https://openalex.org/I114531698","display_name":"Tokyo Institute of Technology","ror":"https://ror.org/0112mx960","country_code":"JP","type":"education","lineage":["https://openalex.org/I114531698"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kazuhiko Fukawa","raw_affiliation_strings":["Tokyo Institute of Technology, Meguro, Tokyo, Japan","[Tokyo Institute of Technology, Tokyo, JAPAN]"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tokyo Institute of Technology, Meguro, Tokyo, Japan","institution_ids":["https://openalex.org/I114531698"]},{"raw_affiliation_string":"[Tokyo Institute of Technology, Tokyo, JAPAN]","institution_ids":["https://openalex.org/I114531698"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5002113575","display_name":"Hiroshi Suzuki","orcid":"https://orcid.org/0000-0001-5371-6385"},"institutions":[{"id":"https://openalex.org/I114531698","display_name":"Tokyo Institute of Technology","ror":"https://ror.org/0112mx960","country_code":"JP","type":"education","lineage":["https://openalex.org/I114531698"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Hiroshi Suzuki","raw_affiliation_strings":["Tokyo Institute of Technology, Meguro, Tokyo, Japan","[Tokyo Institute of Technology, Tokyo, JAPAN]"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tokyo Institute of Technology, Meguro, Tokyo, Japan","institution_ids":["https://openalex.org/I114531698"]},{"raw_affiliation_string":"[Tokyo Institute of Technology, Tokyo, JAPAN]","institution_ids":["https://openalex.org/I114531698"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I114531698"],"apc_list":null,"apc_paid":null,"fwci":0.4854,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.59757196,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":96},"biblio":{"volume":"e90 b","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":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/T10125","display_name":"Advanced Wireless Communication Techniques","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/T11873","display_name":"PAPR reduction in OFDM","score":0.9995999932289124,"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":0.9994999766349792,"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/algorithm","display_name":"Algorithm","score":0.7024846076965332},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.5552305579185486},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.49034786224365234},{"id":"https://openalex.org/keywords/bit-error-rate","display_name":"Bit error rate","score":0.451585590839386},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.44735774397850037},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.41193562746047974},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.39075666666030884},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.38817447423934937},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1313871443271637}],"concepts":[{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.7024846076965332},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.5552305579185486},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.49034786224365234},{"id":"https://openalex.org/C56296756","wikidata":"https://www.wikidata.org/wiki/Q840922","display_name":"Bit error rate","level":3,"score":0.451585590839386},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.44735774397850037},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.41193562746047974},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.39075666666030884},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.38817447423934937},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1313871443271637}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/glocom.2009.5425697","is_oa":false,"landing_page_url":"https://doi.org/10.1109/glocom.2009.5425697","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Peace, Justice and strong institutions","score":0.6200000047683716,"id":"https://metadata.un.org/sdg/16"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W2007996435","https://openalex.org/W2035280084","https://openalex.org/W2051711255","https://openalex.org/W2080918425","https://openalex.org/W2138293524","https://openalex.org/W2141145243","https://openalex.org/W2144366564","https://openalex.org/W2798909945"],"related_works":["https://openalex.org/W2792339401","https://openalex.org/W2120275292","https://openalex.org/W2070062388","https://openalex.org/W1823550417","https://openalex.org/W4243590696","https://openalex.org/W2147186021","https://openalex.org/W2323432503","https://openalex.org/W4321843682","https://openalex.org/W4200390541","https://openalex.org/W2151541251"],"abstract_inverted_index":{"This":[0],"paper":[1],"proposes":[2],"a":[3,32,46,49,65,93,164],"low-complexity":[4],"algorithm":[5,61,172],"to":[6,30,54,144,188,199],"calculate":[7],"log":[8,42,154],"likelihood":[9,43,155,183],"ratios":[10],"(LLRs)":[11],"of":[12,34,84,115,122,152,180,193,202,204],"coded":[13,22,50],"bits,":[14],"which":[15,100],"is":[16,106],"necessary":[17],"for":[18,79],"channel":[19],"decoding":[20],"in":[21,82,186],"MIMO-OFDM":[23],"mobile":[24],"communications.":[25],"An":[26],"approximate":[27],"LLR":[28],"needs":[29],"find":[31,63,71],"pair":[33,66],"transmitted":[35,141],"signal":[36,142],"candidates":[37,81,143],"that":[38,48,169,179,203],"can":[39,62],"maximize":[40],"the":[41,75,85,89,101,110,116,120,123,137,140,150,153,170,181,197],"function":[44],"under":[45],"constraint":[47],"bit":[51],"be":[52,145],"equal":[53],"either":[55],"one":[56],"or":[57],"zero.":[58],"The":[59],"proposed":[60,76,171],"such":[64,80],"simultaneously,":[67],"whereas":[68],"conventional":[69],"ones":[70],"them":[72],"individually.":[73],"Specifically,":[74],"method":[77,112],"searches":[78],"directions":[83,121],"noise":[86,124],"enhancement":[87],"with":[88,159],"MMSE":[90,102],"detection":[91,184],"as":[92,119],"starting":[94],"point.":[95],"First,":[96],"an":[97],"inverse":[98,117],"matrix":[99,104,118],"weight":[103],"includes":[105],"obtained":[107],"and":[108,131,163],"then":[109],"power":[111],"derives":[113],"eigenvectors":[114],"enhancement.":[125],"With":[126],"some":[127],"eigenvectors,":[128],"one-dimensional":[129],"search":[130],"hard":[132],"decision":[133],"are":[134,147],"performed.":[135],"From":[136],"resultant":[138],"signals,":[139],"required":[146],"selected":[148],"on":[149],"basis":[151],"function.":[156],"Computer":[157],"simulations":[158],"4\u00d74":[160],"MIMO-OFDM,":[161],"16QAM,":[162],"half-rate":[165],"convolutional":[166],"code":[167],"demonstrate":[168],"requires":[173],"only":[174],"1.0":[175],"dB":[176],"more":[177],"Eb/N0than":[178],"maximum":[182],"(MLD)":[185],"order":[187],"achieve":[189],"packet":[190],"error":[191],"rate":[192],"10-3,":[194],"while":[195],"reducing":[196],"complexity":[198],"about":[200],"0.2%":[201],"MLD.":[205]},"counts_by_year":[{"year":2018,"cited_by_count":2}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
