{"id":"https://openalex.org/W1991481560","doi":"https://doi.org/10.1109/upinlbs.2014.7033727","title":"Entropy-based non-line of sight identification for wireless positioning systems","display_name":"Entropy-based non-line of sight identification for wireless positioning systems","publication_year":2014,"publication_date":"2014-11-01","ids":{"openalex":"https://openalex.org/W1991481560","doi":"https://doi.org/10.1109/upinlbs.2014.7033727","mag":"1991481560"},"language":"en","primary_location":{"id":"doi:10.1109/upinlbs.2014.7033727","is_oa":false,"landing_page_url":"https://doi.org/10.1109/upinlbs.2014.7033727","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2014 Ubiquitous Positioning Indoor Navigation and Location Based Service (UPINLBS)","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/A5058484034","display_name":"Nayef Alsindi","orcid":null},"institutions":[{"id":"https://openalex.org/I176601375","display_name":"Khalifa University of Science and Technology","ror":"https://ror.org/05hffr360","country_code":"AE","type":"education","lineage":["https://openalex.org/I176601375"]}],"countries":["AE"],"is_corresponding":true,"raw_author_name":"Nayef Alsindi","raw_affiliation_strings":["Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE"],"affiliations":[{"raw_affiliation_string":"Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]},{"raw_affiliation_string":"Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053468679","display_name":"Zden\u011bk Chaloupka","orcid":null},"institutions":[{"id":"https://openalex.org/I176601375","display_name":"Khalifa University of Science and Technology","ror":"https://ror.org/05hffr360","country_code":"AE","type":"education","lineage":["https://openalex.org/I176601375"]}],"countries":["AE"],"is_corresponding":false,"raw_author_name":"Zdenek Chaloupka","raw_affiliation_strings":["Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE"],"affiliations":[{"raw_affiliation_string":"Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]},{"raw_affiliation_string":"Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5086295355","display_name":"James Aweya","orcid":null},"institutions":[{"id":"https://openalex.org/I176601375","display_name":"Khalifa University of Science and Technology","ror":"https://ror.org/05hffr360","country_code":"AE","type":"education","lineage":["https://openalex.org/I176601375"]}],"countries":["AE"],"is_corresponding":false,"raw_author_name":"James Aweya","raw_affiliation_strings":["Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE"],"affiliations":[{"raw_affiliation_string":"Technology and Research (KUSTAR), Khalifa University of Science, Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]},{"raw_affiliation_string":"Etisalat BT Innovation Center (EBTIC), Khalifa University of Science, Technology and Research (KUSTAR), Abu Dhabi, UAE","institution_ids":["https://openalex.org/I176601375"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5058484034"],"corresponding_institution_ids":["https://openalex.org/I176601375"],"apc_list":null,"apc_paid":null,"fwci":0.2093,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.57065854,"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":"185","last_page":"194"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization Technologies","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/T10326","display_name":"Indoor and Outdoor Localization Technologies","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/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.9975000023841858,"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/T12024","display_name":"Ultra-Wideband Communications Technology","score":0.996399998664856,"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/non-line-of-sight-propagation","display_name":"Non-line-of-sight propagation","score":0.9493824243545532},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7084793448448181},{"id":"https://openalex.org/keywords/kurtosis","display_name":"Kurtosis","score":0.5227213501930237},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.45508769154548645},{"id":"https://openalex.org/keywords/entropy","display_name":"Entropy (arrow of time)","score":0.4472346603870392},{"id":"https://openalex.org/keywords/delay-spread","display_name":"Delay spread","score":0.420987993478775},{"id":"https://openalex.org/keywords/indoor-positioning-system","display_name":"Indoor positioning system","score":0.41570520401000977},{"id":"https://openalex.org/keywords/metric","display_name":"Metric (unit)","score":0.4139457941055298},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.4070426821708679},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.35039597749710083},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.32675883173942566},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.19404828548431396},{"id":"https://openalex.org/keywords/multipath-propagation","display_name":"Multipath propagation","score":0.1907631754875183},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.17601779103279114},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.16187724471092224},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.1598428189754486},{"id":"https://openalex.org/keywords/accelerometer","display_name":"Accelerometer","score":0.11471113562583923}],"concepts":[{"id":"https://openalex.org/C154910267","wikidata":"https://www.wikidata.org/wiki/Q1740982","display_name":"Non-line-of-sight propagation","level":3,"score":0.9493824243545532},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7084793448448181},{"id":"https://openalex.org/C166963901","wikidata":"https://www.wikidata.org/wiki/Q287251","display_name":"Kurtosis","level":2,"score":0.5227213501930237},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.45508769154548645},{"id":"https://openalex.org/C106301342","wikidata":"https://www.wikidata.org/wiki/Q4117933","display_name":"Entropy (arrow of time)","level":2,"score":0.4472346603870392},{"id":"https://openalex.org/C49456836","wikidata":"https://www.wikidata.org/wiki/Q666814","display_name":"Delay spread","level":4,"score":0.420987993478775},{"id":"https://openalex.org/C2777486483","wikidata":"https://www.wikidata.org/wiki/Q6026477","display_name":"Indoor positioning system","level":3,"score":0.41570520401000977},{"id":"https://openalex.org/C176217482","wikidata":"https://www.wikidata.org/wiki/Q860554","display_name":"Metric (unit)","level":2,"score":0.4139457941055298},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.4070426821708679},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.35039597749710083},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.32675883173942566},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.19404828548431396},{"id":"https://openalex.org/C161218011","wikidata":"https://www.wikidata.org/wiki/Q11827794","display_name":"Multipath propagation","level":3,"score":0.1907631754875183},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.17601779103279114},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.16187724471092224},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.1598428189754486},{"id":"https://openalex.org/C89805583","wikidata":"https://www.wikidata.org/wiki/Q192940","display_name":"Accelerometer","level":2,"score":0.11471113562583923},{"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/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"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/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/upinlbs.2014.7033727","is_oa":false,"landing_page_url":"https://doi.org/10.1109/upinlbs.2014.7033727","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2014 Ubiquitous Positioning Indoor Navigation and Location Based Service (UPINLBS)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Sustainable cities and communities","id":"https://metadata.un.org/sdg/11","score":0.8600000143051147}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":21,"referenced_works":["https://openalex.org/W1525082254","https://openalex.org/W1972087166","https://openalex.org/W1993877622","https://openalex.org/W1995875735","https://openalex.org/W2008979111","https://openalex.org/W2015195418","https://openalex.org/W2046140035","https://openalex.org/W2091107418","https://openalex.org/W2097619736","https://openalex.org/W2104479788","https://openalex.org/W2110625010","https://openalex.org/W2118626334","https://openalex.org/W2122646546","https://openalex.org/W2131868286","https://openalex.org/W2138114662","https://openalex.org/W2154452292","https://openalex.org/W2162718622","https://openalex.org/W2165801332","https://openalex.org/W2542207374","https://openalex.org/W3143738075","https://openalex.org/W6680180264"],"related_works":["https://openalex.org/W2408852955","https://openalex.org/W1981340510","https://openalex.org/W2475193516","https://openalex.org/W2599852728","https://openalex.org/W3112816794","https://openalex.org/W2064571523","https://openalex.org/W2081678642","https://openalex.org/W1525978739","https://openalex.org/W4281294611","https://openalex.org/W2995988144"],"abstract_inverted_index":{"Indoor":[0],"positioning":[1],"has":[2,108,161,228],"gained":[3],"considerable":[4],"attention":[5],"over":[6],"the":[7,21,49,113,127,130,158,178,204,207,215,222,240,247],"last":[8],"decade.":[9],"For":[10],"time-of":[11],"arrival":[12],"based":[13,125],"systems,":[14],"operating":[15],"in":[16,54,70,112,140,150,211],"urban":[17],"and":[18,72,86,171,185,231],"indoor":[19,153],"environments":[20],"availability":[22],"of":[23,129,177,199,206,239,242,249],"line-of-sight":[24],"signals":[25],"is":[26,59],"not":[27,109],"always":[28],"guaranteed":[29],"due":[30],"to":[31,48,62,65,95,167,213],"physical":[32],"obstructions":[33],"such":[34,81],"as":[35,82],"buildings,":[36],"walls,":[37],"elevator":[38],"shafts,":[39],"etc.":[40],"Specifically":[41],"non-line-of-sight":[42],"(NLOS)":[43],"conditions":[44],"introduce":[45,119],"a":[46,120,151,162],"bias":[47],"distance":[50],"estimation":[51],"which":[52,135,227],"results":[53],"significant":[55,190],"localization":[56],"errors.":[57],"It":[58],"therefore":[60],"vital":[61],"be":[63],"able":[64],"identify":[66,96],"NLOS":[67,97,122,200,251],"channels":[68],"accurately":[69,218],"real-time":[71],"mitigate":[73],"their":[74],"impact":[75,241],"on":[76,126,203,246],"location":[77],"estimation.":[78],"Channel-based":[79],"metrics":[80,180],"RMS":[83,168],"delay":[84,169],"spread":[85,170],"kurtosis":[87],"have":[88,220],"been":[89,110],"proposed":[90],"for":[91],"Ultra":[92],"Wideband":[93],"systems":[94],"channels.":[98],"Their":[99],"performance":[100,191,198,248],"under":[101,181],"different":[102,141,182],"system":[103,183],"bandwidths":[104,184],"(e.g.":[105],"WLAN),":[106],"however,":[107],"investigated":[111],"literature.":[114],"In":[115],"this":[116],"paper":[117],"we":[118,155,219,235],"novel":[121],"identification":[123,201],"metric":[124,160,217],"entropy":[128,159,188,216],"Channel":[131],"Impulse":[132],"Response":[133],"(CIR)":[134],"exhibits":[136],"distinct":[137],"statistical":[138],"properties":[139],"channel":[142],"conditions.":[143],"Using":[144],"frequency":[145],"domain":[146],"wireless":[147],"propagation":[148],"measurements":[149],"typical":[152],"environment":[154],"show":[156],"that":[157,187],"higher":[163],"detection/identification":[164],"rate":[165],"compared":[166],"kurtosis.":[172],"We":[173],"provide":[174],"empirical":[175],"evaluation":[176],"test":[179],"illustrate":[186],"shows":[189],"gains":[192],"especially":[193],"at":[194],"lower":[195],"bandwidths.":[196],"The":[197],"depends":[202],"accuracy":[205],"estimated":[208],"metric.":[209],"Thus":[210],"order":[212],"estimate":[214],"selected":[221],"autoregressive":[223],"(AR)":[224],"modeling":[225,244],"method":[226],"shown":[229],"accurate":[230],"consistent":[232],"performance.":[233],"Finally,":[234],"present":[236],"an":[237],"investigation":[238],"AR":[243],"parameters":[245],"entropy-based":[250],"identification.":[252]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}