{"id":"https://openalex.org/W4414648822","doi":"https://doi.org/10.1109/vtc2025-spring65109.2025.11174623","title":"Advanced Channel Decomposition Techniques in OTFS: A GSVD Approach for Multi-User Downlink","display_name":"Advanced Channel Decomposition Techniques in OTFS: A GSVD Approach for Multi-User Downlink","publication_year":2025,"publication_date":"2025-06-17","ids":{"openalex":"https://openalex.org/W4414648822","doi":"https://doi.org/10.1109/vtc2025-spring65109.2025.11174623"},"language":"en","primary_location":{"id":"doi:10.1109/vtc2025-spring65109.2025.11174623","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2025-spring65109.2025.11174623","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE 101st Vehicular Technology Conference (VTC2025-Spring)","raw_type":"proceedings-article"},"type":"article","indexed_in":["arxiv","crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2504.18315","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5076476702","display_name":"Omid Abbassi Aghda","orcid":null},"institutions":[{"id":"https://openalex.org/I4210120471","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210120471"]}],"countries":["PT"],"is_corresponding":true,"raw_author_name":"Omid Abbassi Aghda","raw_affiliation_strings":["Instituto de Telecomunicações,Lisboa,Portugal"],"affiliations":[{"raw_affiliation_string":"Instituto de Telecomunicações,Lisboa,Portugal","institution_ids":["https://openalex.org/I4210120471"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050402811","display_name":"Oussama Belkacem","orcid":"https://orcid.org/0000-0003-0936-6044"},"institutions":[{"id":"https://openalex.org/I4210120471","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210120471"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Oussama Ben Haj Belkacem","raw_affiliation_strings":["Instituto de Telecomunicações,Lisboa,Portugal"],"affiliations":[{"raw_affiliation_string":"Instituto de Telecomunicações,Lisboa,Portugal","institution_ids":["https://openalex.org/I4210120471"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035347742","display_name":"Dou Hu","orcid":"https://orcid.org/0000-0002-8952-1296"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Dou Hu","raw_affiliation_strings":["University of Tokyo,Tokyo,Japan"],"affiliations":[{"raw_affiliation_string":"University of Tokyo,Tokyo,Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5088474565","display_name":"Jo\u00e3o Guerreiro","orcid":"https://orcid.org/0000-0001-5106-239X"},"institutions":[{"id":"https://openalex.org/I4210120471","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210120471"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Jo\u00e3o Guerreiro","raw_affiliation_strings":["Instituto de Telecomunicações,Lisboa,Portugal"],"affiliations":[{"raw_affiliation_string":"Instituto de Telecomunicações,Lisboa,Portugal","institution_ids":["https://openalex.org/I4210120471"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5041810090","display_name":"Nuno Souto","orcid":"https://orcid.org/0000-0003-3823-4470"},"institutions":[{"id":"https://openalex.org/I4210120471","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210120471"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Nuno Souto","raw_affiliation_strings":["Instituto de Telecomunicações,Lisboa,Portugal"],"affiliations":[{"raw_affiliation_string":"Instituto de Telecomunicações,Lisboa,Portugal","institution_ids":["https://openalex.org/I4210120471"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5119493978","display_name":"Michal Szczachor","orcid":null},"institutions":[{"id":"https://openalex.org/I83558840","display_name":"Universidade Nova de Lisboa","ror":"https://ror.org/02xankh89","country_code":"PT","type":"education","lineage":["https://openalex.org/I83558840"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Michal Szczachor","raw_affiliation_strings":["Universidade Nova de Lisboa,Caparica,Portugal,2829-516"],"affiliations":[{"raw_affiliation_string":"Universidade Nova de Lisboa,Caparica,Portugal,2829-516","institution_ids":["https://openalex.org/I83558840"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5034724801","display_name":"Rui Dinis","orcid":"https://orcid.org/0000-0002-8520-7267"},"institutions":[{"id":"https://openalex.org/I4210120471","display_name":"Instituto de Telecomunica\u00e7\u00f5es","ror":"https://ror.org/02ht4fk33","country_code":"PT","type":"nonprofit","lineage":["https://openalex.org/I4210120471"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Rui Dinis","raw_affiliation_strings":["Instituto de Telecomunicações,Lisboa,Portugal"],"affiliations":[{"raw_affiliation_string":"Instituto de Telecomunicações,Lisboa,Portugal","institution_ids":["https://openalex.org/I4210120471"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":7,"corresponding_author_ids":["https://openalex.org/A5076476702"],"corresponding_institution_ids":["https://openalex.org/I4210120471"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.26244948,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"5"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11873","display_name":"PAPR reduction in OFDM","score":0.9940999746322632,"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/T11873","display_name":"PAPR reduction in OFDM","score":0.9940999746322632,"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/T12146","display_name":"Power Line Communications and Noise","score":0.9736999869346619,"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/T10767","display_name":"Advanced Photonic Communication Systems","score":0.9449999928474426,"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/precoding","display_name":"Precoding","score":0.8628000020980835},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7533000111579895},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6266999840736389},{"id":"https://openalex.org/keywords/singular-value-decomposition","display_name":"Singular value decomposition","score":0.5892999768257141},{"id":"https://openalex.org/keywords/base-station","display_name":"Base station","score":0.5077999830245972},{"id":"https://openalex.org/keywords/channel-state-information","display_name":"Channel state information","score":0.47209998965263367},{"id":"https://openalex.org/keywords/control-theory","display_name":"Control theory (sociology)","score":0.4230000078678131},{"id":"https://openalex.org/keywords/bit-error-rate","display_name":"Bit error rate","score":0.4016999900341034},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.35690000653266907}],"concepts":[{"id":"https://openalex.org/C160562895","wikidata":"https://www.wikidata.org/wiki/Q7239557","display_name":"Precoding","level":4,"score":0.8628000020980835},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7533000111579895},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6266999840736389},{"id":"https://openalex.org/C22789450","wikidata":"https://www.wikidata.org/wiki/Q420904","display_name":"Singular value decomposition","level":2,"score":0.5892999768257141},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5884000062942505},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5842000246047974},{"id":"https://openalex.org/C68649174","wikidata":"https://www.wikidata.org/wiki/Q1379116","display_name":"Base station","level":2,"score":0.5077999830245972},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.47209998965263367},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.4230000078678131},{"id":"https://openalex.org/C56296756","wikidata":"https://www.wikidata.org/wiki/Q840922","display_name":"Bit error rate","level":3,"score":0.4016999900341034},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.37599998712539673},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.35690000653266907},{"id":"https://openalex.org/C90652560","wikidata":"https://www.wikidata.org/wiki/Q11091747","display_name":"Minimum mean square error","level":3,"score":0.33500000834465027},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.32749998569488525},{"id":"https://openalex.org/C123079801","wikidata":"https://www.wikidata.org/wiki/Q750240","display_name":"Modulation (music)","level":2,"score":0.30799999833106995},{"id":"https://openalex.org/C42355184","wikidata":"https://www.wikidata.org/wiki/Q1361088","display_name":"Matrix decomposition","level":3,"score":0.3061000108718872},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.29829999804496765},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.2976999878883362},{"id":"https://openalex.org/C155437304","wikidata":"https://www.wikidata.org/wiki/Q8069444","display_name":"Zero-forcing precoding","level":5,"score":0.2865000069141388},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.2827000021934509},{"id":"https://openalex.org/C124681953","wikidata":"https://www.wikidata.org/wiki/Q339062","display_name":"Decomposition","level":2,"score":0.2712000012397766},{"id":"https://openalex.org/C139945424","wikidata":"https://www.wikidata.org/wiki/Q1940696","display_name":"Mean squared error","level":2,"score":0.2712000012397766},{"id":"https://openalex.org/C61797465","wikidata":"https://www.wikidata.org/wiki/Q1188986","display_name":"Term (time)","level":2,"score":0.2696000039577484},{"id":"https://openalex.org/C109282560","wikidata":"https://www.wikidata.org/wiki/Q4166054","display_name":"Singular value","level":3,"score":0.26829999685287476},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.2678999900817871},{"id":"https://openalex.org/C2778258933","wikidata":"https://www.wikidata.org/wiki/Q16918986","display_name":"Decomposition method (queueing theory)","level":2,"score":0.2667999863624573},{"id":"https://openalex.org/C48103436","wikidata":"https://www.wikidata.org/wiki/Q599031","display_name":"State (computer science)","level":2,"score":0.26330000162124634},{"id":"https://openalex.org/C9936470","wikidata":"https://www.wikidata.org/wiki/Q6510405","display_name":"Least-squares function approximation","level":3,"score":0.25619998574256897},{"id":"https://openalex.org/C107645828","wikidata":"https://www.wikidata.org/wiki/Q12070446","display_name":"System model","level":2,"score":0.25270000100135803},{"id":"https://openalex.org/C77618280","wikidata":"https://www.wikidata.org/wiki/Q1155772","display_name":"Scheme (mathematics)","level":2,"score":0.25}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/vtc2025-spring65109.2025.11174623","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtc2025-spring65109.2025.11174623","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2025 IEEE 101st Vehicular Technology Conference (VTC2025-Spring)","raw_type":"proceedings-article"},{"id":"pmh:oai:arXiv.org:2504.18315","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2504.18315","pdf_url":"https://arxiv.org/pdf/2504.18315","source":{"id":"https://openalex.org/S4393918464","display_name":"ArXiv.org","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"pmh:doi:10.48550/arxiv.2504.18315","is_oa":true,"landing_page_url":null,"pdf_url":null,"source":{"id":"https://openalex.org/S4406922384","display_name":"Open MIND","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":"publisher-specific-oa","license_id":"https://openalex.org/licenses/publisher-specific-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Article"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2504.18315","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2504.18315","pdf_url":"https://arxiv.org/pdf/2504.18315","source":{"id":"https://openalex.org/S4393918464","display_name":"ArXiv.org","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W1977271127","https://openalex.org/W1985852691","https://openalex.org/W2063862284","https://openalex.org/W2104578446","https://openalex.org/W2612254130","https://openalex.org/W2899131610","https://openalex.org/W2962951066","https://openalex.org/W2999306815","https://openalex.org/W3130599955","https://openalex.org/W4388692637","https://openalex.org/W4401507787","https://openalex.org/W4401878956","https://openalex.org/W4404030231"],"related_works":[],"abstract_inverted_index":{"In":[0,117],"this":[1],"paper,":[2],"we":[3],"propose":[4],"a":[5,111],"multi-user":[6,87],"downlink":[7],"system":[8,83,89],"for":[9,61,104,110],"two":[10,40,91],"users":[11],"based":[12,47],"on":[13,48],"the":[14,25,32,35,39,49,58,66,81,85,118,121,130],"orthogonal":[15],"time":[16],"frequency":[17],"space":[18],"(OTFS)":[19],"modulation":[20],"scheme.":[21],"The":[22],"design":[23,122],"leverages":[24],"generalized":[26],"singular":[27,53],"value":[28],"decomposition":[29],"(GSVD)":[30],"of":[31,76],"channels":[33],"between":[34],"base":[36],"station":[37],"and":[38,44,51,64,109],"users,":[41],"applying":[42],"precoding":[43,128],"detection":[45],"matrices":[46],"right":[50],"left":[52],"vectors,":[54],"respectively.":[55],"We":[56],"derive":[57],"analytical":[59],"expressions":[60],"three":[62],"scenarios":[63,92],"present":[65],"corresponding":[67],"simulation":[68],"results.":[69],"These":[70],"results":[71],"demonstrate":[72],"that,":[73],"in":[74,90],"terms":[75],"bit":[77],"error":[78,98],"rate":[79],"(BER),":[80],"proposed":[82],"outperforms":[84],"conventional":[86],"OTFS":[88],"when":[93],"using":[94],"minimum":[95],"mean":[96],"square":[97],"(MMSE)":[99],"equalizers":[100],"or":[101],"precoder,":[102],"both":[103],"perfect":[105],"channel":[106,114],"state":[107],"information":[108],"scenario":[112],"with":[113],"estimation":[115],"errors.":[116],"third":[119],"scenario,":[120],"is":[123],"equivalent":[124],"to":[125],"zero-forcing":[126],"(ZF)":[127],"at":[129],"transmitter.":[131]},"counts_by_year":[],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}