{"doi":"10.1109/lsp.2005.861590","title":"Median-based clustering for underdetermined blind signal processing","abstract":"In underdetermined blind source separation, more sources are to be extracted from less observed mixtures without knowing both sources and mixing matrix. k-means-style clustering algorithms are commonly used to do this algorithmically given sufficiently sparse sources, but in any case other than deterministic sources, this lacks theoretical justification. After establishing that mean-based algorithms converge to wrong solutions in practice, we propose a median-based clustering scheme. Theoretical justification as well as algorithmic realizations (both online and batch) are given and illustrated by some examples.","journal":"IEEE Signal Processing Letters","year":2006,"id":6692,"datarank":1.5541772636313789,"base_score":3.4011973816621555,"endowment":3.4011973816621555,"self_citation_contribution":0.5101796072493234,"citation_network_contribution":1.0439976563820554,"self_endowment_contribution":0.5101796072493234,"citer_contribution":1.0439976563820554,"corpus_percentile":null,"corpus_rank":null,"citation_count":29,"citer_count":28,"citers_with_citation_signal":19,"citers_with_endowment":19,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.0501,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2006-02-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":42,"name":"Fabian Joachim Theis","orcid":"0000-0002-2419-1943","position":3,"is_corresponding":false},{"id":17335,"name":"Carlos G. Puntonet","orcid":"0000-0001-6886-5535","position":4,"is_corresponding":false},{"id":380,"name":"Elmar W. Lang","orcid":"0000-0001-7440-0224","position":5,"is_corresponding":false}],"reference_count":10,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-03-01T18:20:47.508186Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}