{"id":"https://openalex.org/W3135299271","doi":"https://doi.org/10.1109/jiot.2021.3063531","title":"FallViewer: A Fine-Grained Indoor Fall Detection System With Ubiquitous Wi-Fi Devices","display_name":"FallViewer: A Fine-Grained Indoor Fall Detection System With Ubiquitous Wi-Fi Devices","publication_year":2021,"publication_date":"2021-03-03","ids":{"openalex":"https://openalex.org/W3135299271","doi":"https://doi.org/10.1109/jiot.2021.3063531","mag":"3135299271"},"language":"en","primary_location":{"id":"doi:10.1109/jiot.2021.3063531","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jiot.2021.3063531","pdf_url":null,"source":{"id":"https://openalex.org/S2480266640","display_name":"IEEE Internet of Things Journal","issn_l":"2327-4662","issn":["2327-4662","2372-2541"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Internet of Things Journal","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/A5046283171","display_name":"Yongchuan Wang","orcid":"https://orcid.org/0000-0001-5449-2192"},"institutions":[{"id":"https://openalex.org/I125839683","display_name":"Beijing Institute of Technology","ror":"https://ror.org/01skt4w74","country_code":"CN","type":"education","lineage":["https://openalex.org/I125839683","https://openalex.org/I890469752"]},{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["CN","US"],"is_corresponding":true,"raw_author_name":"Yongchuan Wang","raw_affiliation_strings":["Department of Computer and Information Sciences, Temple University, Philadelphia, PA, USA","School of Computer Science, Beijing Institute of Technology, Beijing, China"],"affiliations":[{"raw_affiliation_string":"Department of Computer and Information Sciences, Temple University, Philadelphia, PA, USA","institution_ids":["https://openalex.org/I84392919"]},{"raw_affiliation_string":"School of Computer Science, Beijing Institute of Technology, Beijing, China","institution_ids":["https://openalex.org/I125839683"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5051317379","display_name":"Song Yang","orcid":"https://orcid.org/0000-0002-5385-1402"},"institutions":[{"id":"https://openalex.org/I125839683","display_name":"Beijing Institute of Technology","ror":"https://ror.org/01skt4w74","country_code":"CN","type":"education","lineage":["https://openalex.org/I125839683","https://openalex.org/I890469752"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Song Yang","raw_affiliation_strings":["School of Computer Science, Beijing Institute of Technology, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer Science, Beijing Institute of Technology, Beijing, China","institution_ids":["https://openalex.org/I125839683"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100373560","display_name":"Fan Li","orcid":"https://orcid.org/0000-0002-2348-4488"},"institutions":[{"id":"https://openalex.org/I125839683","display_name":"Beijing Institute of Technology","ror":"https://ror.org/01skt4w74","country_code":"CN","type":"education","lineage":["https://openalex.org/I125839683","https://openalex.org/I890469752"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Fan Li","raw_affiliation_strings":["School of Computer Science, Beijing Institute of Technology, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer Science, Beijing Institute of Technology, Beijing, China","institution_ids":["https://openalex.org/I125839683"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101873998","display_name":"Yue Wu","orcid":"https://orcid.org/0000-0002-8306-2252"},"institutions":[{"id":"https://openalex.org/I125839683","display_name":"Beijing Institute of Technology","ror":"https://ror.org/01skt4w74","country_code":"CN","type":"education","lineage":["https://openalex.org/I125839683","https://openalex.org/I890469752"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yue Wu","raw_affiliation_strings":["School of Computer Science, Beijing Institute of Technology, Beijing, China"],"affiliations":[{"raw_affiliation_string":"School of Computer Science, Beijing Institute of Technology, Beijing, China","institution_ids":["https://openalex.org/I125839683"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100445368","display_name":"Yu Wang","orcid":"https://orcid.org/0000-0003-3511-0288"},"institutions":[{"id":"https://openalex.org/I125839683","display_name":"Beijing Institute of Technology","ror":"https://ror.org/01skt4w74","country_code":"CN","type":"education","lineage":["https://openalex.org/I125839683","https://openalex.org/I890469752"]},{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["CN","US"],"is_corresponding":false,"raw_author_name":"Yu Wang","raw_affiliation_strings":["Department of Computer and Information Sciences, Temple University, Philadelphia, PA, USA","School of Computer Science, Beijing Institute of Technology, Beijing, China"],"affiliations":[{"raw_affiliation_string":"Department of Computer and Information Sciences, Temple University, Philadelphia, PA, USA","institution_ids":["https://openalex.org/I84392919"]},{"raw_affiliation_string":"School of Computer Science, Beijing Institute of Technology, Beijing, China","institution_ids":["https://openalex.org/I125839683"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5046283171"],"corresponding_institution_ids":["https://openalex.org/I125839683","https://openalex.org/I84392919"],"apc_list":null,"apc_paid":null,"fwci":2.946,"has_fulltext":false,"cited_by_count":35,"citation_normalized_percentile":{"value":0.91372558,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":99},"biblio":{"volume":"8","issue":"15","first_page":"12455","last_page":"12466"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10326","display_name":"Indoor and Outdoor Localization Technologies","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/T10326","display_name":"Indoor and Outdoor Localization Technologies","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/T11158","display_name":"Wireless Networks and Protocols","score":0.998199999332428,"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/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9890999794006348,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"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/computer-science","display_name":"Computer science","score":0.8717736601829529},{"id":"https://openalex.org/keywords/robustness","display_name":"Robustness (evolution)","score":0.8025121688842773},{"id":"https://openalex.org/keywords/wearable-computer","display_name":"Wearable computer","score":0.6004897356033325},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.5751727819442749},{"id":"https://openalex.org/keywords/multipath-propagation","display_name":"Multipath propagation","score":0.5632697939872742},{"id":"https://openalex.org/keywords/channel-state-information","display_name":"Channel state information","score":0.5544614791870117},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.4756602644920349},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.3798556625843048},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.3344835042953491},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.25669407844543457},{"id":"https://openalex.org/keywords/embedded-system","display_name":"Embedded system","score":0.20746377110481262}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8717736601829529},{"id":"https://openalex.org/C63479239","wikidata":"https://www.wikidata.org/wiki/Q7353546","display_name":"Robustness (evolution)","level":3,"score":0.8025121688842773},{"id":"https://openalex.org/C150594956","wikidata":"https://www.wikidata.org/wiki/Q1334829","display_name":"Wearable computer","level":2,"score":0.6004897356033325},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.5751727819442749},{"id":"https://openalex.org/C161218011","wikidata":"https://www.wikidata.org/wiki/Q11827794","display_name":"Multipath propagation","level":3,"score":0.5632697939872742},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.5544614791870117},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.4756602644920349},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.3798556625843048},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.3344835042953491},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.25669407844543457},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.20746377110481262},{"id":"https://openalex.org/C104317684","wikidata":"https://www.wikidata.org/wiki/Q7187","display_name":"Gene","level":2,"score":0.0},{"id":"https://openalex.org/C55493867","wikidata":"https://www.wikidata.org/wiki/Q7094","display_name":"Biochemistry","level":1,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/jiot.2021.3063531","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jiot.2021.3063531","pdf_url":null,"source":{"id":"https://openalex.org/S2480266640","display_name":"IEEE Internet of Things Journal","issn_l":"2327-4662","issn":["2327-4662","2372-2541"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Internet of Things Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/15","score":0.5299999713897705,"display_name":"Life in Land"}],"awards":[{"id":"https://openalex.org/G2916598006","display_name":null,"funder_award_id":"61802018","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G5894644143","display_name":null,"funder_award_id":"61772077","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G7860887917","display_name":null,"funder_award_id":"62072040","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"},{"id":"https://openalex.org/F4320327514","display_name":"Beijing Institute of Technology Research Fund Program for Young Scholars","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":34,"referenced_works":["https://openalex.org/W1585879837","https://openalex.org/W1983301216","https://openalex.org/W1986805689","https://openalex.org/W2024796780","https://openalex.org/W2082361295","https://openalex.org/W2086023031","https://openalex.org/W2089695767","https://openalex.org/W2095396347","https://openalex.org/W2096300942","https://openalex.org/W2103252230","https://openalex.org/W2109362352","https://openalex.org/W2128628418","https://openalex.org/W2153635508","https://openalex.org/W2156059598","https://openalex.org/W2219936746","https://openalex.org/W2307851164","https://openalex.org/W2338892592","https://openalex.org/W2340862004","https://openalex.org/W2344757691","https://openalex.org/W2425627187","https://openalex.org/W2473779510","https://openalex.org/W2517331439","https://openalex.org/W2553945741","https://openalex.org/W2594230123","https://openalex.org/W2755767288","https://openalex.org/W2756088315","https://openalex.org/W2783740565","https://openalex.org/W2783857023","https://openalex.org/W2801118647","https://openalex.org/W2896909703","https://openalex.org/W2944172587","https://openalex.org/W4235628085","https://openalex.org/W6635170509","https://openalex.org/W6698302138"],"related_works":["https://openalex.org/W2376969857","https://openalex.org/W614679600","https://openalex.org/W2110252992","https://openalex.org/W2365309764","https://openalex.org/W2025635845","https://openalex.org/W2770593030","https://openalex.org/W2185486561","https://openalex.org/W2162082378","https://openalex.org/W2160582905","https://openalex.org/W2294565841"],"abstract_inverted_index":{"The":[0],"safety":[1],"of":[2,17,96,143,152,180],"the":[3,18,23,91,124,141,153,159],"elderly":[4],"has":[5],"attracted":[6],"much":[7],"attention":[8],"nowadays.":[9],"Among":[10],"various":[11,146],"daily":[12],"activities,":[13],"fall":[14,34,74,83,174],"is":[15,120],"one":[16],"most":[19],"dangerous":[20],"events":[21,175],"for":[22,110,117,164],"elderly,":[24],"especially":[25],"those":[26],"who":[27],"live":[28],"alone.":[29],"Most":[30],"existing":[31],"works":[32],"on":[33,38,61,89],"detection":[35,75,84],"are":[36,42],"based":[37,88],"wearable":[39],"devices,":[40],"which":[41,139,182],"inconvenient":[43],"in":[44,168],"using.":[45],"Several":[46],"solutions":[47],"only":[48],"use":[49],"coarse-grained":[50],"Wi-Fi":[51,97,155],"signal":[52,156],"information":[53,94],"that":[54,184],"contains":[55],"many":[56],"biases,":[57],"and":[58,72,106,157,189],"lack":[59],"considerations":[60],"environmental":[62],"changes.":[63],"These":[64],"situations":[65],"motivate":[66],"us":[67],"to":[68,122,134,145,161],"design":[69],"a":[70,82,130,136,162],"fine-grained":[71,101],"robust":[73],"approach.":[76],"In":[77],"this":[78],"article,":[79],"we":[80,103,128],"propose":[81,104],"system,":[85],"called":[86],"FallViewer,":[87],"analyzing":[90],"channel":[92],"state":[93],"(CSI)":[95],"signals.":[98],"To":[99],"get":[100,135],"information,":[102],"phase":[105],"amplitude":[107],"calibration":[108],"methods":[109],"deviation":[111],"correction.":[112],"Then,":[113],"an":[114,177],"adjustment":[115],"approach":[116],"antenna":[118],"power":[119],"designed":[121],"eliminate":[123],"multipath":[125],"interference.":[126],"Furthermore,":[127],"apply":[129],"double":[131],"sliding":[132],"window":[133],"flexible":[137],"threshold,":[138],"improves":[140],"robustness":[142],"FallViewer":[144,149,171,185],"environments.":[147],"Finally,":[148],"extracts":[150],"features":[151,160],"processed":[154],"sends":[158],"LibSVM":[163],"classification.":[165],"Through":[166],"experiments":[167],"different":[169],"environments,":[170],"can":[172,186],"detect":[173],"with":[176],"average":[178],"accuracy":[179],"95.8%,":[181],"indicates":[183],"work":[187],"reliably":[188],"effectively.":[190]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":5},{"year":2024,"cited_by_count":9},{"year":2023,"cited_by_count":10},{"year":2022,"cited_by_count":9},{"year":2021,"cited_by_count":1}],"updated_date":"2026-04-09T08:11:56.329763","created_date":"2025-10-10T00:00:00"}