{"id":"https://openalex.org/W2980658640","doi":"https://doi.org/10.1109/access.2019.2947581","title":"Online Offline Learning for Sound-Based Indoor Localization Using Low-Cost Hardware","display_name":"Online Offline Learning for Sound-Based Indoor Localization Using Low-Cost Hardware","publication_year":2019,"publication_date":"2019-01-01","ids":{"openalex":"https://openalex.org/W2980658640","doi":"https://doi.org/10.1109/access.2019.2947581","mag":"2980658640"},"language":"en","primary_location":{"id":"doi:10.1109/access.2019.2947581","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2947581","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08869796.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08869796.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5000635678","display_name":"R\u00fcdiger Machhamer","orcid":"https://orcid.org/0000-0002-0194-6194"},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"R\u00fcdiger Machhamer","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":"https://orcid.org/0000-0002-0194-6194","affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017107590","display_name":"Matthias Dziubany","orcid":"https://orcid.org/0000-0003-3446-499X"},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Matthias Dziubany","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034288080","display_name":"Levin Czenkusch","orcid":null},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Levin Czenkusch","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5039305053","display_name":"Hendrik Laux","orcid":"https://orcid.org/0000-0002-0671-4149"},"institutions":[{"id":"https://openalex.org/I887968799","display_name":"RWTH Aachen University","ror":"https://ror.org/04xfq0f34","country_code":"DE","type":"education","lineage":["https://openalex.org/I887968799"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Hendrik Laux","raw_affiliation_strings":["ISEK Research and Teaching Area, RWTH Aachen University, Aachen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"ISEK Research and Teaching Area, RWTH Aachen University, Aachen, Germany","institution_ids":["https://openalex.org/I887968799"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072895220","display_name":"Anke Schmeink","orcid":"https://orcid.org/0000-0002-9929-2925"},"institutions":[{"id":"https://openalex.org/I887968799","display_name":"RWTH Aachen University","ror":"https://ror.org/04xfq0f34","country_code":"DE","type":"education","lineage":["https://openalex.org/I887968799"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Anke Schmeink","raw_affiliation_strings":["ISEK Research and Teaching Area, RWTH Aachen University, Aachen, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"ISEK Research and Teaching Area, RWTH Aachen University, Aachen, Germany","institution_ids":["https://openalex.org/I887968799"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5027221102","display_name":"Klaus-Uwe Gollmer","orcid":"https://orcid.org/0000-0002-1330-499X"},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Klaus-Uwe Gollmer","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103269860","display_name":"Stefan Naumann","orcid":"https://orcid.org/0009-0000-6542-2229"},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Stefan Naumann","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5091189894","display_name":"Guido Dartmann","orcid":"https://orcid.org/0000-0002-6786-6664"},"institutions":[{"id":"https://openalex.org/I137932638","display_name":"Trier University of Applied Sciences","ror":"https://ror.org/02e3hdx05","country_code":"DE","type":"education","lineage":["https://openalex.org/I137932638"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Guido Dartmann","raw_affiliation_strings":["Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute for Software Systems (ISS), Trier University of Applied Sciences-Environmental Campus Birkenfeld, Birkenfeld, Germany","institution_ids":["https://openalex.org/I137932638"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":1850,"currency":"USD","value_usd":1850},"apc_paid":{"value":1850,"currency":"USD","value_usd":1850},"fwci":0.3503,"has_fulltext":true,"cited_by_count":5,"citation_normalized_percentile":{"value":0.60718426,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":"7","issue":null,"first_page":"155088","last_page":"155106"},"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/T10860","display_name":"Speech and Audio Processing","score":0.9945999979972839,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T11233","display_name":"Advanced Adaptive Filtering Techniques","score":0.9922000169754028,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"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/computer-science","display_name":"Computer science","score":0.8331226110458374},{"id":"https://openalex.org/keywords/adaptability","display_name":"Adaptability","score":0.7147634029388428},{"id":"https://openalex.org/keywords/cyber-physical-system","display_name":"Cyber-physical system","score":0.5622417330741882},{"id":"https://openalex.org/keywords/robot","display_name":"Robot","score":0.5437747836112976},{"id":"https://openalex.org/keywords/field","display_name":"Field (mathematics)","score":0.44790881872177124},{"id":"https://openalex.org/keywords/the-internet","display_name":"The Internet","score":0.44463637471199036},{"id":"https://openalex.org/keywords/human\u2013computer-interaction","display_name":"Human\u2013computer interaction","score":0.4245757758617401},{"id":"https://openalex.org/keywords/categorization","display_name":"Categorization","score":0.42207539081573486},{"id":"https://openalex.org/keywords/internet-of-things","display_name":"Internet of Things","score":0.41575175523757935},{"id":"https://openalex.org/keywords/embedded-system","display_name":"Embedded system","score":0.40493595600128174},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.3622502088546753},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.35873472690582275},{"id":"https://openalex.org/keywords/distributed-computing","display_name":"Distributed computing","score":0.3405618667602539},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.10798144340515137}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8331226110458374},{"id":"https://openalex.org/C177606310","wikidata":"https://www.wikidata.org/wiki/Q5674297","display_name":"Adaptability","level":2,"score":0.7147634029388428},{"id":"https://openalex.org/C179768478","wikidata":"https://www.wikidata.org/wiki/Q1120057","display_name":"Cyber-physical system","level":2,"score":0.5622417330741882},{"id":"https://openalex.org/C90509273","wikidata":"https://www.wikidata.org/wiki/Q11012","display_name":"Robot","level":2,"score":0.5437747836112976},{"id":"https://openalex.org/C9652623","wikidata":"https://www.wikidata.org/wiki/Q190109","display_name":"Field (mathematics)","level":2,"score":0.44790881872177124},{"id":"https://openalex.org/C110875604","wikidata":"https://www.wikidata.org/wiki/Q75","display_name":"The Internet","level":2,"score":0.44463637471199036},{"id":"https://openalex.org/C107457646","wikidata":"https://www.wikidata.org/wiki/Q207434","display_name":"Human\u2013computer interaction","level":1,"score":0.4245757758617401},{"id":"https://openalex.org/C94124525","wikidata":"https://www.wikidata.org/wiki/Q912550","display_name":"Categorization","level":2,"score":0.42207539081573486},{"id":"https://openalex.org/C81860439","wikidata":"https://www.wikidata.org/wiki/Q251212","display_name":"Internet of Things","level":2,"score":0.41575175523757935},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.40493595600128174},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.3622502088546753},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.35873472690582275},{"id":"https://openalex.org/C120314980","wikidata":"https://www.wikidata.org/wiki/Q180634","display_name":"Distributed computing","level":1,"score":0.3405618667602539},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.10798144340515137},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","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}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/access.2019.2947581","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2947581","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08869796.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},{"id":"pmh:oai:publications.rwth-aachen.de:775500","is_oa":true,"landing_page_url":"https://publications.rwth-aachen.de/record/775500","pdf_url":null,"source":{"id":"https://openalex.org/S4306401362","display_name":"RWTH Publications (RWTH Aachen)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I887968799","host_organization_name":"RWTH Aachen University","host_organization_lineage":["https://openalex.org/I887968799"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE access 7, 155088-155106 (2019). doi:10.1109/ACCESS.2019.2947581","raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:doaj.org/article:8fe238cf746e441ba86d25ef0d98c5fb","is_oa":true,"landing_page_url":"https://doaj.org/article/8fe238cf746e441ba86d25ef0d98c5fb","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"IEEE Access, Vol 7, Pp 155088-155106 (2019)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1109/access.2019.2947581","is_oa":true,"landing_page_url":"https://doi.org/10.1109/access.2019.2947581","pdf_url":"https://ieeexplore.ieee.org/ielx7/6287639/8600701/08869796.pdf","source":{"id":"https://openalex.org/S2485537415","display_name":"IEEE Access","issn_l":"2169-3536","issn":["2169-3536"],"is_oa":true,"is_in_doaj":true,"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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Access","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Industry, innovation and infrastructure","id":"https://metadata.un.org/sdg/9","score":0.4699999988079071}],"awards":[{"id":"https://openalex.org/G8530713468","display_name":null,"funder_award_id":"01IS17073","funder_id":"https://openalex.org/F4320321114","funder_display_name":"Bundesministerium f\u00fcr Bildung und Forschung"}],"funders":[{"id":"https://openalex.org/F4320321114","display_name":"Bundesministerium f\u00fcr Bildung und Forschung","ror":"https://ror.org/04pz7b180"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2980658640.pdf","grobid_xml":"https://content.openalex.org/works/W2980658640.grobid-xml"},"referenced_works_count":29,"referenced_works":["https://openalex.org/W1470882115","https://openalex.org/W1489347216","https://openalex.org/W1574664245","https://openalex.org/W1595048604","https://openalex.org/W1869928576","https://openalex.org/W1977556410","https://openalex.org/W1991848143","https://openalex.org/W2039434802","https://openalex.org/W2098981346","https://openalex.org/W2108482152","https://openalex.org/W2116101591","https://openalex.org/W2120501001","https://openalex.org/W2120570715","https://openalex.org/W2122111042","https://openalex.org/W2123749980","https://openalex.org/W2129616335","https://openalex.org/W2143737806","https://openalex.org/W2144219012","https://openalex.org/W2162812155","https://openalex.org/W2596636257","https://openalex.org/W2603071509","https://openalex.org/W2883974892","https://openalex.org/W2902119340","https://openalex.org/W4235050778","https://openalex.org/W4250933792","https://openalex.org/W6628570548","https://openalex.org/W6677850982","https://openalex.org/W6678524678","https://openalex.org/W6678968263"],"related_works":["https://openalex.org/W2357124094","https://openalex.org/W2387399993","https://openalex.org/W2389739210","https://openalex.org/W2348924972","https://openalex.org/W2365736347","https://openalex.org/W2047454415","https://openalex.org/W2070040999","https://openalex.org/W2387293848","https://openalex.org/W2250140200","https://openalex.org/W3121791438"],"abstract_inverted_index":{"Online":[0,103,108],"Learning":[1,51,109],"algorithms":[2,52,110],"and":[3,25,74,121,131],"Indoor":[4,85],"Positioning":[5,86],"Systems":[6],"are":[7,19],"complex":[8],"applications":[9,136],"in":[10,59,111,137],"the":[11,29,38,76,80,94,100,112,123,126],"environment":[12,98],"of":[13,31,40,79,82,96,102,114,125],"cyber-physical":[14],"systems.":[15],"These":[16],"distributed":[17],"systems":[18,35],"created":[20],"by":[21,49],"networking":[22],"intelligent":[23],"machines":[24],"autonomous":[26],"robots":[27],"on":[28],"Internet":[30],"Things":[32],"using":[33],"embedded":[34],"that":[36],"enable":[37],"exchange":[39],"information":[41,46],"at":[42],"any":[43],"time.":[44],"This":[45],"is":[47],"processed":[48],"Machine":[50],"to":[53,62,93],"make":[54],"decisions":[55],"about":[56],"current":[57],"developments":[58],"production":[60],"or":[61],"influence":[63],"logistics":[64],"processes":[65],"for":[66,134],"optimization":[67],"purposes.":[68],"In":[69],"this":[70],"article,":[71],"we":[72,106],"present":[73],"categorize":[75],"further":[77],"development":[78],"prototype":[81],"a":[83],"novel":[84],"System,":[87],"which":[88],"constantly":[89],"adapts":[90],"its":[91,97,129,132],"knowledge":[92],"conditions":[95],"with":[99,118],"help":[101],"Learning.":[104],"Here,":[105],"apply":[107],"field":[113],"sound-based":[115],"indoor":[116],"localization":[117],"low-cost":[119],"hardware":[120],"demonstrate":[122],"improvement":[124],"system":[127],"over":[128],"predecessor":[130],"adaptability":[133],"different":[135],"an":[138],"experimental":[139],"case":[140],"study.":[141]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}