{"id":"https://openalex.org/W3180912121","doi":"https://doi.org/10.1109/isit45174.2021.9518255","title":"Optimality of the Discrete Fourier Transform for Beamspace Massive MU-MIMO Communication","display_name":"Optimality of the Discrete Fourier Transform for Beamspace Massive MU-MIMO Communication","publication_year":2021,"publication_date":"2021-07-12","ids":{"openalex":"https://openalex.org/W3180912121","doi":"https://doi.org/10.1109/isit45174.2021.9518255","mag":"3180912121"},"language":"en","primary_location":{"id":"doi:10.1109/isit45174.2021.9518255","is_oa":false,"landing_page_url":"https://doi.org/10.1109/isit45174.2021.9518255","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 IEEE International Symposium on Information Theory (ISIT)","raw_type":"proceedings-article"},"type":"preprint","indexed_in":["arxiv","crossref","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2107.06953","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5064162564","display_name":"Sueda Taner","orcid":"https://orcid.org/0000-0002-8133-8024"},"institutions":[{"id":"https://openalex.org/I205783295","display_name":"Cornell University","ror":"https://ror.org/05bnh6r87","country_code":"US","type":"education","lineage":["https://openalex.org/I205783295"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Sueda Taner","raw_affiliation_strings":["School of Electrical and Computer Engineering, Cornell University,Ithaca,NY","cornell University"],"affiliations":[{"raw_affiliation_string":"School of Electrical and Computer Engineering, Cornell University,Ithaca,NY","institution_ids":["https://openalex.org/I205783295"]},{"raw_affiliation_string":"cornell University","institution_ids":["https://openalex.org/I205783295"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5083617223","display_name":"Christoph Studer","orcid":"https://orcid.org/0000-0001-8950-6267"},"institutions":[{"id":"https://openalex.org/I35440088","display_name":"ETH Zurich","ror":"https://ror.org/05a28rw58","country_code":"CH","type":"education","lineage":["https://openalex.org/I2799323385","https://openalex.org/I35440088"]}],"countries":["CH"],"is_corresponding":false,"raw_author_name":"Christoph Studer","raw_affiliation_strings":["ETH Z&#x00FC;rich,Department of Information Technology and Electrical Engineering,Switzerland","ETH Z\u00fcrich"],"affiliations":[{"raw_affiliation_string":"ETH Z&#x00FC;rich,Department of Information Technology and Electrical Engineering,Switzerland","institution_ids":["https://openalex.org/I35440088"]},{"raw_affiliation_string":"ETH Z\u00fcrich","institution_ids":["https://openalex.org/I35440088"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5064162564"],"corresponding_institution_ids":["https://openalex.org/I205783295"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.06504504,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"2960","last_page":"2965"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9998000264167786,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9998000264167786,"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/T10936","display_name":"Millimeter-Wave Propagation and Modeling","score":0.9998000264167786,"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/T11946","display_name":"Antenna Design and Optimization","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace 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/mimo","display_name":"MIMO","score":0.7525938749313354},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6268478631973267},{"id":"https://openalex.org/keywords/baseband","display_name":"Baseband","score":0.6092719435691833},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5497936010360718},{"id":"https://openalex.org/keywords/discrete-fourier-transform","display_name":"Discrete Fourier transform (general)","score":0.5236915349960327},{"id":"https://openalex.org/keywords/extremely-high-frequency","display_name":"Extremely high frequency","score":0.5112922191619873},{"id":"https://openalex.org/keywords/fourier-transform","display_name":"Fourier transform","score":0.4694722890853882},{"id":"https://openalex.org/keywords/fast-fourier-transform","display_name":"Fast Fourier transform","score":0.46741461753845215},{"id":"https://openalex.org/keywords/antenna-array","display_name":"Antenna array","score":0.4519580900669098},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.4079604744911194},{"id":"https://openalex.org/keywords/antenna","display_name":"Antenna (radio)","score":0.40112823247909546},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.33215469121932983},{"id":"https://openalex.org/keywords/bandwidth","display_name":"Bandwidth (computing)","score":0.3314700424671173},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.32719218730926514},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.29375001788139343},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2628340721130371},{"id":"https://openalex.org/keywords/fractional-fourier-transform","display_name":"Fractional Fourier transform","score":0.24203675985336304},{"id":"https://openalex.org/keywords/fourier-analysis","display_name":"Fourier analysis","score":0.14362958073616028},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.12203764915466309},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.08471733331680298}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.7525938749313354},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6268478631973267},{"id":"https://openalex.org/C65165936","wikidata":"https://www.wikidata.org/wiki/Q575784","display_name":"Baseband","level":3,"score":0.6092719435691833},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5497936010360718},{"id":"https://openalex.org/C57733114","wikidata":"https://www.wikidata.org/wiki/Q1006032","display_name":"Discrete Fourier transform (general)","level":5,"score":0.5236915349960327},{"id":"https://openalex.org/C45764600","wikidata":"https://www.wikidata.org/wiki/Q570342","display_name":"Extremely high frequency","level":2,"score":0.5112922191619873},{"id":"https://openalex.org/C102519508","wikidata":"https://www.wikidata.org/wiki/Q6520159","display_name":"Fourier transform","level":2,"score":0.4694722890853882},{"id":"https://openalex.org/C75172450","wikidata":"https://www.wikidata.org/wiki/Q623950","display_name":"Fast Fourier transform","level":2,"score":0.46741461753845215},{"id":"https://openalex.org/C62191587","wikidata":"https://www.wikidata.org/wiki/Q4771249","display_name":"Antenna array","level":3,"score":0.4519580900669098},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.4079604744911194},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.40112823247909546},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.33215469121932983},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.3314700424671173},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.32719218730926514},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.29375001788139343},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2628340721130371},{"id":"https://openalex.org/C76563020","wikidata":"https://www.wikidata.org/wiki/Q4817582","display_name":"Fractional Fourier transform","level":4,"score":0.24203675985336304},{"id":"https://openalex.org/C203024314","wikidata":"https://www.wikidata.org/wiki/Q1365258","display_name":"Fourier analysis","level":3,"score":0.14362958073616028},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.12203764915466309},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.08471733331680298}],"mesh":[],"locations_count":6,"locations":[{"id":"doi:10.1109/isit45174.2021.9518255","is_oa":false,"landing_page_url":"https://doi.org/10.1109/isit45174.2021.9518255","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 IEEE International Symposium on Information Theory (ISIT)","raw_type":"proceedings-article"},{"id":"pmh:oai:arXiv.org:2107.06953","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2107.06953","pdf_url":"https://arxiv.org/pdf/2107.06953","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"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:oai:www.research-collection.ethz.ch:20.500.11850/507012","is_oa":true,"landing_page_url":"http://hdl.handle.net/20.500.11850/507012","pdf_url":null,"source":{"id":"https://openalex.org/S4306402302","display_name":"Repository for Publications and Research Data (ETH Zurich)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I35440088","host_organization_name":"ETH Zurich","host_organization_lineage":["https://openalex.org/I35440088"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"2021 IEEE International Symposium on Information Theory (ISIT)","raw_type":"info:eu-repo/semantics/conferenceObject"},{"id":"doi:10.48550/arxiv.2107.06953","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2107.06953","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"},{"id":"doi:10.3929/ethz-b-000507012","is_oa":true,"landing_page_url":"https://doi.org/10.3929/ethz-b-000507012","pdf_url":null,"source":{"id":"https://openalex.org/S7407051236","display_name":"ETH Z\u00fcrich Research Collection","issn_l":null,"issn":[],"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":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article-journal"},{"id":"mag:3180912121","is_oa":false,"landing_page_url":null,"pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":null}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2107.06953","is_oa":true,"landing_page_url":"http://arxiv.org/abs/2107.06953","pdf_url":"https://arxiv.org/pdf/2107.06953","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"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":[{"id":"https://openalex.org/F4320321652","display_name":"Eidgen\u00f6ssische Technische Hochschule Z\u00fcrich","ror":"https://ror.org/05a28rw58"},{"id":"https://openalex.org/F4320332180","display_name":"Defense Advanced Research Projects Agency","ror":"https://ror.org/02caytj08"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":31,"referenced_works":["https://openalex.org/W905396345","https://openalex.org/W1981745143","https://openalex.org/W1997834106","https://openalex.org/W2027711878","https://openalex.org/W2056798980","https://openalex.org/W2111953900","https://openalex.org/W2116334496","https://openalex.org/W2124348301","https://openalex.org/W2136886378","https://openalex.org/W2141682101","https://openalex.org/W2314562768","https://openalex.org/W2563885308","https://openalex.org/W2576906596","https://openalex.org/W2887078280","https://openalex.org/W2950738210","https://openalex.org/W2964003927","https://openalex.org/W2964317473","https://openalex.org/W2970032378","https://openalex.org/W3003620877","https://openalex.org/W3007405536","https://openalex.org/W3009470412","https://openalex.org/W3013432275","https://openalex.org/W3015404505","https://openalex.org/W3020123194","https://openalex.org/W3082110094","https://openalex.org/W3083561074","https://openalex.org/W3086393698","https://openalex.org/W3089262738","https://openalex.org/W6773942006","https://openalex.org/W6774110784","https://openalex.org/W6929344529"],"related_works":["https://openalex.org/W2533910686","https://openalex.org/W3167191958","https://openalex.org/W2486164642","https://openalex.org/W2559491032","https://openalex.org/W2002288746","https://openalex.org/W3134264804","https://openalex.org/W2724191955","https://openalex.org/W2966084980","https://openalex.org/W2963944051","https://openalex.org/W3091391704","https://openalex.org/W1849489850","https://openalex.org/W3010399649","https://openalex.org/W3033179367","https://openalex.org/W2763636788","https://openalex.org/W2914020402","https://openalex.org/W2289289037","https://openalex.org/W2808443784","https://openalex.org/W2952763425","https://openalex.org/W2953664551","https://openalex.org/W3081486000"],"abstract_inverted_index":{"Beamspace":[0],"processing":[1,63,104],"is":[2,85],"an":[3,126],"emerging":[4],"technique":[5],"to":[6,54],"reduce":[7],"baseband":[8],"complexity":[9],"in":[10],"massive":[11],"multiuser":[12],"(MU)":[13],"multiple-input":[14],"multiple-output":[15],"(MIMO)":[16],"communication":[17],"systems":[18],"operating":[19],"at":[20,32,78],"millimeter-wave":[21],"(mmWave)":[22],"and":[23,49,110,133,139],"terahertz":[24],"frequencies.":[25],"The":[26],"high":[27,34],"directionality":[28],"of":[29,42,59,98],"wave":[30,60],"propagation":[31],"such":[33],"frequencies":[35],"ensures":[36],"that":[37,120],"only":[38],"a":[39,66,73,88],"small":[40],"number":[41],"transmission":[43],"paths":[44],"exist":[45],"between":[46],"user":[47],"equipments":[48],"basestation":[50],"(BS).":[51],"In":[52,91],"order":[53],"resolve":[55],"the":[56,79,99],"sparse":[57],"nature":[58],"propagation,":[61],"beamspace":[62,103,123],"traditionally":[64],"computes":[65],"spatial":[67],"discrete":[68],"Fourier":[69],"transform":[70],"(DFT)":[71],"across":[72],"uniform":[74],"linear":[75],"antenna":[76],"array":[77],"BS":[80],"where":[81],"each":[82],"DFT":[83,100],"output":[84],"associated":[86],"with":[87,105],"specific":[89],"beam.":[90],"this":[92,114],"paper,":[93],"we":[94,116,134],"study":[95],"optimality":[96,137],"conditions":[97],"for":[101],"sparsity-based":[102],"idealistic":[106],"mmWave":[107],"channel":[108],"models":[109],"realistic":[111],"channels.":[112],"To":[113],"end,":[115],"propose":[117],"two":[118],"algorithms":[119],"learn":[121],"unitary":[122],"transforms":[124],"using":[125],"<tex":[127],"xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"":[128],"xmlns:xlink=\"http://www.w3.org/1999/xlink\">$\\ell^{4}$</tex>":[129],"-norm-based":[130],"sparsity":[131],"measure,":[132],"investigate":[135],"their":[136],"theoretically":[138],"via":[140],"simulations.":[141]},"counts_by_year":[],"updated_date":"2026-04-09T08:11:56.329763","created_date":"2025-10-10T00:00:00"}