{"id":"https://openalex.org/W2099679634","doi":"https://doi.org/10.1109/wcnc.2012.6214496","title":"Hierarchical codebook design for fast search with Grassmannian codebook","display_name":"Hierarchical codebook design for fast search with Grassmannian codebook","publication_year":2012,"publication_date":"2012-04-01","ids":{"openalex":"https://openalex.org/W2099679634","doi":"https://doi.org/10.1109/wcnc.2012.6214496","mag":"2099679634"},"language":"en","primary_location":{"id":"doi:10.1109/wcnc.2012.6214496","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2012.6214496","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 IEEE Wireless Communications and Networking Conference (WCNC)","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/A5002440278","display_name":"Kyeongjun Ko","orcid":"https://orcid.org/0000-0001-7575-864X"},"institutions":[{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Kyeongjun Ko","raw_affiliation_strings":["School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul, South Korea","School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul 151-744, Korea"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul, South Korea","institution_ids":["https://openalex.org/I139264467"]},{"raw_affiliation_string":"School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul 151-744, Korea","institution_ids":["https://openalex.org/I139264467"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100376261","display_name":"Jungwoo Lee","orcid":"https://orcid.org/0000-0002-6804-980X"},"institutions":[{"id":"https://openalex.org/I139264467","display_name":"Seoul National University","ror":"https://ror.org/04h9pn542","country_code":"KR","type":"education","lineage":["https://openalex.org/I139264467"]}],"countries":["KR"],"is_corresponding":false,"raw_author_name":"Jungwoo Lee","raw_affiliation_strings":["School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul, South Korea","School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul 151-744, Korea"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul, South Korea","institution_ids":["https://openalex.org/I139264467"]},{"raw_affiliation_string":"School of Electrical Engineering and Computer Sciences, Seoul National University, Seoul 151-744, Korea","institution_ids":["https://openalex.org/I139264467"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I139264467"],"apc_list":null,"apc_paid":null,"fwci":0.4123,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.59629223,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"873","last_page":"877"},"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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9998000264167786,"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/T11321","display_name":"Error Correcting Code Techniques","score":0.9998000264167786,"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/codebook","display_name":"Codebook","score":0.9900676012039185},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.64319908618927},{"id":"https://openalex.org/keywords/transmitter","display_name":"Transmitter","score":0.6012476682662964},{"id":"https://openalex.org/keywords/linde\u2013buzo\u2013gray-algorithm","display_name":"Linde\u2013Buzo\u2013Gray algorithm","score":0.5978768467903137},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.5976512432098389},{"id":"https://openalex.org/keywords/code-word","display_name":"Code word","score":0.5936490893363953},{"id":"https://openalex.org/keywords/grassmannian","display_name":"Grassmannian","score":0.4761878550052643},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.47235116362571716},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4637269377708435},{"id":"https://openalex.org/keywords/computational-complexity-theory","display_name":"Computational complexity theory","score":0.41467756032943726},{"id":"https://openalex.org/keywords/metric","display_name":"Metric (unit)","score":0.4109795093536377},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3330082297325134},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2656867504119873},{"id":"https://openalex.org/keywords/decoding-methods","display_name":"Decoding methods","score":0.25529903173446655},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.19619104266166687},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.16373327374458313}],"concepts":[{"id":"https://openalex.org/C127759330","wikidata":"https://www.wikidata.org/wiki/Q637416","display_name":"Codebook","level":2,"score":0.9900676012039185},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.64319908618927},{"id":"https://openalex.org/C47798520","wikidata":"https://www.wikidata.org/wiki/Q190157","display_name":"Transmitter","level":3,"score":0.6012476682662964},{"id":"https://openalex.org/C93372532","wikidata":"https://www.wikidata.org/wiki/Q6552455","display_name":"Linde\u2013Buzo\u2013Gray algorithm","level":3,"score":0.5978768467903137},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.5976512432098389},{"id":"https://openalex.org/C153207627","wikidata":"https://www.wikidata.org/wiki/Q863873","display_name":"Code word","level":3,"score":0.5936490893363953},{"id":"https://openalex.org/C162929932","wikidata":"https://www.wikidata.org/wiki/Q129638","display_name":"Grassmannian","level":2,"score":0.4761878550052643},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.47235116362571716},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4637269377708435},{"id":"https://openalex.org/C179799912","wikidata":"https://www.wikidata.org/wiki/Q205084","display_name":"Computational complexity theory","level":2,"score":0.41467756032943726},{"id":"https://openalex.org/C176217482","wikidata":"https://www.wikidata.org/wiki/Q860554","display_name":"Metric (unit)","level":2,"score":0.4109795093536377},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3330082297325134},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2656867504119873},{"id":"https://openalex.org/C57273362","wikidata":"https://www.wikidata.org/wiki/Q576722","display_name":"Decoding methods","level":2,"score":0.25529903173446655},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.19619104266166687},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.16373327374458313},{"id":"https://openalex.org/C21547014","wikidata":"https://www.wikidata.org/wiki/Q1423657","display_name":"Operations management","level":1,"score":0.0},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/wcnc.2012.6214496","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc.2012.6214496","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 IEEE Wireless Communications and Networking Conference (WCNC)","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":13,"referenced_works":["https://openalex.org/W2023675349","https://openalex.org/W2035469609","https://openalex.org/W2066018120","https://openalex.org/W2074863717","https://openalex.org/W2113271807","https://openalex.org/W2130256523","https://openalex.org/W2130521103","https://openalex.org/W2134383396","https://openalex.org/W2164110223","https://openalex.org/W2169448252","https://openalex.org/W2187326887","https://openalex.org/W4236273810","https://openalex.org/W4243265178"],"related_works":["https://openalex.org/W2096936443","https://openalex.org/W2081863301","https://openalex.org/W2352648934","https://openalex.org/W2365109233","https://openalex.org/W2355032504","https://openalex.org/W2393018242","https://openalex.org/W1940433659","https://openalex.org/W2735172431","https://openalex.org/W2011867735","https://openalex.org/W2064440077"],"abstract_inverted_index":{"It":[0],"has":[1,91],"been":[2],"well":[3,137],"known":[4],"that":[5,94],"channel":[6,14,22,30,39,54,58,66],"aware":[7],"systems":[8,16],"(closed-loop)":[9],"have":[10,128],"better":[11],"performance":[12,101],"than":[13],"unknown":[15],"(open-loop).":[17],"In":[18,63,118],"order":[19],"to":[20,106,131],"know":[21],"in":[23,45,114],"the":[24,32,38,65,78,83,92,108,133],"transmitter,":[25],"receivers":[26],"should":[27,41],"send":[28],"own":[29],"information":[31,40,67],"transmitter":[33],"through":[34],"reverse":[35,56],"channel.":[36],"However,":[37],"be":[42],"fed":[43],"back":[44],"Frequency":[46],"Division":[47],"Duplexing":[48],"(FDD)":[49],"additionally":[50],"since":[51],"forward":[52],"link":[53,57],"and":[55,74],"are":[59],"different":[60],"each":[61,75],"other.":[62],"FDD,":[64],"is":[68,98],"usually":[69],"quantized":[70],"as":[71,95,136,138],"a":[72],"codebook":[73,84,90,96,116,124],"receiver":[76],"feedback":[77],"best":[79,109],"codeword":[80,110],"index":[81],"within":[82],"by":[85],"any":[86],"metric":[87],"generally.":[88],"The":[89],"characteristic":[93],"size":[97],"larger":[99],"system":[100],"increases":[102,112],"but":[103],"computational":[104],"complexity":[105,134],"find":[107],"also":[111],"exponentially":[113],"conventional":[115],"structure.":[117],"this":[119],"paper,":[120],"we":[121],"propose":[122],"some":[123],"design":[125],"schemes":[126],"which":[127],"hierarchical":[129],"structure":[130],"overcome":[132],"problem":[135],"achieves":[139],"near-optimal":[140],"performance.":[141]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2014,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}