{"id":"https://openalex.org/W2134238797","doi":"https://doi.org/10.1109/icassp.2009.4960395","title":"On ICA of improper and noncircular sources","display_name":"On ICA of improper and noncircular sources","publication_year":2009,"publication_date":"2009-04-01","ids":{"openalex":"https://openalex.org/W2134238797","doi":"https://doi.org/10.1109/icassp.2009.4960395","mag":"2134238797"},"language":"en","primary_location":{"id":"doi:10.1109/icassp.2009.4960395","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icassp.2009.4960395","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Conference on Acoustics, Speech and Signal Processing","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/A5006601601","display_name":"Peter J. Schreier","orcid":"https://orcid.org/0000-0001-8481-7031"},"institutions":[{"id":"https://openalex.org/I78757542","display_name":"University of Newcastle Australia","ror":"https://ror.org/00eae9z71","country_code":"AU","type":"education","lineage":["https://openalex.org/I78757542"]}],"countries":["AU"],"is_corresponding":false,"raw_author_name":"Peter J. Schreier","raw_affiliation_strings":["Electrical Engineering & Computer Science, University of Newcastle, Australia","Electrical Engr. & Comp. Science, The Univ. of Newcastle, Australia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Electrical Engineering & Computer Science, University of Newcastle, Australia","institution_ids":["https://openalex.org/I78757542"]},{"raw_affiliation_string":"Electrical Engr. & Comp. Science, The Univ. of Newcastle, Australia","institution_ids":["https://openalex.org/I78757542"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060798483","display_name":"T\u00fclay Adal\u0131","orcid":"https://orcid.org/0000-0003-0594-2796"},"institutions":[{"id":"https://openalex.org/I126744593","display_name":"University of Maryland, Baltimore","ror":"https://ror.org/04rq5mt64","country_code":"US","type":"education","lineage":["https://openalex.org/I126744593"]},{"id":"https://openalex.org/I79272384","display_name":"University of Maryland, Baltimore County","ror":"https://ror.org/02qskvh78","country_code":"US","type":"education","lineage":["https://openalex.org/I79272384"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Tulay Adali","raw_affiliation_strings":["Computer Science& Electrical Engineering, University of Maryland, Baltimore, MD, USA","Comp. Science & Electrical Engr., Univ. of Maryland, Baltimore County, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Computer Science& Electrical Engineering, University of Maryland, Baltimore, MD, USA","institution_ids":["https://openalex.org/I126744593"]},{"raw_affiliation_string":"Comp. Science & Electrical Engr., Univ. of Maryland, Baltimore County, USA","institution_ids":["https://openalex.org/I79272384"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5080469112","display_name":"Louis L. Scharf","orcid":"https://orcid.org/0000-0003-1764-9335"},"institutions":[{"id":"https://openalex.org/I92446798","display_name":"Colorado State University","ror":"https://ror.org/03k1gpj17","country_code":"US","type":"education","lineage":["https://openalex.org/I92446798"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Louis L. Scharf","raw_affiliation_strings":["Electrical & Computer Engineering, Colorado State University, USA","Electrical & Computer Engr., Colorado State Univ., USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Electrical & Computer Engineering, Colorado State University, USA","institution_ids":["https://openalex.org/I92446798"]},{"raw_affiliation_string":"Electrical & Computer Engr., Colorado State Univ., USA","institution_ids":["https://openalex.org/I92446798"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":9,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"3561","last_page":"3564"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11447","display_name":"Blind Source Separation Techniques","score":1.0,"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"}},"topics":[{"id":"https://openalex.org/T11447","display_name":"Blind Source Separation Techniques","score":1.0,"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/T10320","display_name":"Neural Networks and Applications","score":0.9829000234603882,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T10581","display_name":"Neural dynamics and brain function","score":0.9804999828338623,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/independent-component-analysis","display_name":"Independent component analysis","score":0.9011108875274658},{"id":"https://openalex.org/keywords/signal","display_name":"SIGNAL (programming language)","score":0.629218339920044},{"id":"https://openalex.org/keywords/higher-order-statistics","display_name":"Higher-order statistics","score":0.622842013835907},{"id":"https://openalex.org/keywords/blind-signal-separation","display_name":"Blind signal separation","score":0.5530199408531189},{"id":"https://openalex.org/keywords/signal-processing","display_name":"Signal processing","score":0.49067747592926025},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.47556179761886597},{"id":"https://openalex.org/keywords/random-variable","display_name":"Random variable","score":0.4744982421398163},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.47170424461364746},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.46069782972335815},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.45678624510765076},{"id":"https://openalex.org/keywords/order-statistic","display_name":"Order statistic","score":0.4415617883205414},{"id":"https://openalex.org/keywords/domain","display_name":"Domain (mathematical analysis)","score":0.42040228843688965},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.4179364740848541},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.3397330641746521},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.13545185327529907},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.07612985372543335}],"concepts":[{"id":"https://openalex.org/C51432778","wikidata":"https://www.wikidata.org/wiki/Q1259145","display_name":"Independent component analysis","level":2,"score":0.9011108875274658},{"id":"https://openalex.org/C2779843651","wikidata":"https://www.wikidata.org/wiki/Q7390335","display_name":"SIGNAL (programming language)","level":2,"score":0.629218339920044},{"id":"https://openalex.org/C2780576426","wikidata":"https://www.wikidata.org/wiki/Q5757980","display_name":"Higher-order statistics","level":4,"score":0.622842013835907},{"id":"https://openalex.org/C120317606","wikidata":"https://www.wikidata.org/wiki/Q17105967","display_name":"Blind signal separation","level":3,"score":0.5530199408531189},{"id":"https://openalex.org/C104267543","wikidata":"https://www.wikidata.org/wiki/Q208163","display_name":"Signal processing","level":3,"score":0.49067747592926025},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.47556179761886597},{"id":"https://openalex.org/C122123141","wikidata":"https://www.wikidata.org/wiki/Q176623","display_name":"Random variable","level":2,"score":0.4744982421398163},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.47170424461364746},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.46069782972335815},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.45678624510765076},{"id":"https://openalex.org/C44082924","wikidata":"https://www.wikidata.org/wiki/Q1767128","display_name":"Order statistic","level":2,"score":0.4415617883205414},{"id":"https://openalex.org/C36503486","wikidata":"https://www.wikidata.org/wiki/Q11235244","display_name":"Domain (mathematical analysis)","level":2,"score":0.42040228843688965},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.4179364740848541},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.3397330641746521},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.13545185327529907},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.07612985372543335},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.0},{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/icassp.2009.4960395","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icassp.2009.4960395","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Conference on Acoustics, Speech and Signal Processing","raw_type":"proceedings-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.310.2198","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.310.2198","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.csee.umbc.edu/~adali/pubs/IEEEpubs/icassp2009schreier.pdf","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W391578156","https://openalex.org/W1974388905","https://openalex.org/W1978979650","https://openalex.org/W2025341678","https://openalex.org/W2037095848","https://openalex.org/W2104072768","https://openalex.org/W2108384452","https://openalex.org/W2112345337","https://openalex.org/W2124757684","https://openalex.org/W2127737934","https://openalex.org/W2128967371","https://openalex.org/W2141224535","https://openalex.org/W2143410296","https://openalex.org/W2156105064","https://openalex.org/W2166288622","https://openalex.org/W2610857016","https://openalex.org/W3100792434","https://openalex.org/W4237723258","https://openalex.org/W4242259102"],"related_works":["https://openalex.org/W2390344110","https://openalex.org/W2364896863","https://openalex.org/W2361066326","https://openalex.org/W2046761971","https://openalex.org/W2182042810","https://openalex.org/W2156932837","https://openalex.org/W2380698615","https://openalex.org/W374502268","https://openalex.org/W2103029460","https://openalex.org/W2356479045"],"abstract_inverted_index":{"We":[0,37],"provide":[1],"a":[2,27,32],"review":[3],"of":[4],"independent":[5],"component":[6],"analysis":[7],"(ICA)":[8],"for":[9,40,88],"complex-valued":[10],"improper":[11,17],"and":[12,26,45,72],"noncircular":[13,28],"random":[14,18,29],"sources.":[15],"An":[16],"signal":[19,30],"is":[20],"correlated":[21],"with":[22],"its":[23],"complex":[24,74,93],"conjugate,":[25],"has":[31],"rotationally":[33],"variant":[34],"probability":[35],"distribution.":[36],"present":[38],"methods":[39],"ICA":[41,49,77,90],"using":[42,95],"second-order":[43,52],"statistics,":[44,53,81],"higher-order":[46,80],"statistics.":[47],"For":[48,76],"based":[50,78],"on":[51,79],"we":[54,82],"emphasize":[55],"the":[56,61,66,70,73,92],"key":[57],"role":[58],"played":[59],"by":[60],"circularity":[62],"coefficients,":[63],"which":[64],"are":[65],"canonical":[67],"correlations":[68],"between":[69],"source":[71],"conjugate.":[75],"show":[83],"how":[84],"to":[85,91],"extend":[86],"algorithms":[87],"real-valued":[89],"domain":[94],"Wirtinger":[96],"calculus.":[97]},"counts_by_year":[{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}