{"id":"https://openalex.org/W4414871323","doi":"https://doi.org/10.1109/twc.2025.3615506","title":"Spatial Multiplexing Over LOS Channels With Circular Arrays: Analysis and Design","display_name":"Spatial Multiplexing Over LOS Channels With Circular Arrays: Analysis and Design","publication_year":2025,"publication_date":"2025-10-06","ids":{"openalex":"https://openalex.org/W4414871323","doi":"https://doi.org/10.1109/twc.2025.3615506"},"language":"en","primary_location":{"id":"doi:10.1109/twc.2025.3615506","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2025.3615506","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"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 Transactions on Wireless Communications","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"hybrid","oa_url":"https://doi.org/10.1109/twc.2025.3615506","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5061965374","display_name":"Liqin Ding","orcid":"https://orcid.org/0000-0002-5181-2493"},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":true,"raw_author_name":"Liqin Ding","raw_affiliation_strings":["Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063388671","display_name":"Rahul Devassy","orcid":"https://orcid.org/0000-0001-6781-0452"},"institutions":[{"id":"https://openalex.org/I1306339040","display_name":"Ericsson (Sweden)","ror":"https://ror.org/05a7rhx54","country_code":"SE","type":"company","lineage":["https://openalex.org/I1306339040"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Rahul Devassy","raw_affiliation_strings":["Ericsson Research, Ericsson AB, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Ericsson Research, Ericsson AB, Gothenburg, Sweden","institution_ids":["https://openalex.org/I1306339040"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054004036","display_name":"Artem R. Vilenskiy","orcid":"https://orcid.org/0000-0002-7701-799X"},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Artem R. Vilenskiy","raw_affiliation_strings":["Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012139897","display_name":"Mikael Coldrey","orcid":"https://orcid.org/0000-0002-0241-6371"},"institutions":[{"id":"https://openalex.org/I1306339040","display_name":"Ericsson (Sweden)","ror":"https://ror.org/05a7rhx54","country_code":"SE","type":"company","lineage":["https://openalex.org/I1306339040"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Mikael Coldrey","raw_affiliation_strings":["Ericsson Research, Ericsson AB, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Ericsson Research, Ericsson AB, Gothenburg, Sweden","institution_ids":["https://openalex.org/I1306339040"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5011869976","display_name":"Thomas Eriksson","orcid":"https://orcid.org/0000-0002-2087-7227"},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Thomas Eriksson","raw_affiliation_strings":["Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5081349499","display_name":"Erik G. Str\u00f6m","orcid":"https://orcid.org/0000-0002-3084-7232"},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Erik G. Str\u00f6m","raw_affiliation_strings":["Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden"],"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden","institution_ids":["https://openalex.org/I66862912"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5061965374"],"corresponding_institution_ids":["https://openalex.org/I66862912"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.27351596,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"25","issue":null,"first_page":"4936","last_page":"4952"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11797","display_name":"graph theory and CDMA systems","score":0.9836999773979187,"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/T11797","display_name":"graph theory and CDMA systems","score":0.9836999773979187,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9733999967575073,"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/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.970300018787384,"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/angular-momentum","display_name":"Angular momentum","score":0.6069999933242798},{"id":"https://openalex.org/keywords/topology","display_name":"Topology (electrical circuits)","score":0.5120999813079834},{"id":"https://openalex.org/keywords/spatial-multiplexing","display_name":"Spatial multiplexing","score":0.492900013923645},{"id":"https://openalex.org/keywords/bessel-function","display_name":"Bessel function","score":0.4652999937534332},{"id":"https://openalex.org/keywords/directional-antenna","display_name":"Directional antenna","score":0.45190000534057617},{"id":"https://openalex.org/keywords/horn-antenna","display_name":"Horn antenna","score":0.40880000591278076},{"id":"https://openalex.org/keywords/antenna","display_name":"Antenna (radio)","score":0.40849998593330383},{"id":"https://openalex.org/keywords/singular-value","display_name":"Singular value","score":0.38670000433921814},{"id":"https://openalex.org/keywords/multiplexing","display_name":"Multiplexing","score":0.37279999256134033}],"concepts":[{"id":"https://openalex.org/C155675718","wikidata":"https://www.wikidata.org/wiki/Q161254","display_name":"Angular momentum","level":2,"score":0.6069999933242798},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.5120999813079834},{"id":"https://openalex.org/C85884896","wikidata":"https://www.wikidata.org/wiki/Q7574075","display_name":"Spatial multiplexing","level":4,"score":0.492900013923645},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.47530001401901245},{"id":"https://openalex.org/C107706756","wikidata":"https://www.wikidata.org/wiki/Q219637","display_name":"Bessel function","level":2,"score":0.4652999937534332},{"id":"https://openalex.org/C64671776","wikidata":"https://www.wikidata.org/wiki/Q769152","display_name":"Directional antenna","level":3,"score":0.45190000534057617},{"id":"https://openalex.org/C182810700","wikidata":"https://www.wikidata.org/wiki/Q759117","display_name":"Horn antenna","level":5,"score":0.40880000591278076},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.40849998593330383},{"id":"https://openalex.org/C109282560","wikidata":"https://www.wikidata.org/wiki/Q4166054","display_name":"Singular value","level":3,"score":0.38670000433921814},{"id":"https://openalex.org/C19275194","wikidata":"https://www.wikidata.org/wiki/Q222903","display_name":"Multiplexing","level":2,"score":0.37279999256134033},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.36039999127388},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.3495999872684479},{"id":"https://openalex.org/C97744766","wikidata":"https://www.wikidata.org/wiki/Q870845","display_name":"Channel capacity","level":3,"score":0.3407999873161316},{"id":"https://openalex.org/C85686653","wikidata":"https://www.wikidata.org/wiki/Q1224994","display_name":"Circular buffer","level":2,"score":0.3393999934196472},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3310999870300293},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.32580000162124634},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3239000141620636},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.31869998574256897},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.30799999833106995},{"id":"https://openalex.org/C62191587","wikidata":"https://www.wikidata.org/wiki/Q4771249","display_name":"Antenna array","level":3,"score":0.3077999949455261},{"id":"https://openalex.org/C190060920","wikidata":"https://www.wikidata.org/wiki/Q4876232","display_name":"Beamwidth","level":3,"score":0.29350000619888306},{"id":"https://openalex.org/C34388435","wikidata":"https://www.wikidata.org/wiki/Q2267362","display_name":"Bounded function","level":2,"score":0.29159998893737793},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.28679999709129333},{"id":"https://openalex.org/C59108619","wikidata":"https://www.wikidata.org/wiki/Q2261398","display_name":"Circular orbit","level":2,"score":0.2856000065803528},{"id":"https://openalex.org/C175291020","wikidata":"https://www.wikidata.org/wiki/Q1156822","display_name":"Offset (computer science)","level":2,"score":0.27730000019073486},{"id":"https://openalex.org/C62611344","wikidata":"https://www.wikidata.org/wiki/Q1062658","display_name":"Node (physics)","level":2,"score":0.2646999955177307},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.26330000162124634},{"id":"https://openalex.org/C509933004","wikidata":"https://www.wikidata.org/wiki/Q194163","display_name":"Broadband","level":2,"score":0.2630999982357025},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.25760000944137573},{"id":"https://openalex.org/C9172910","wikidata":"https://www.wikidata.org/wiki/Q379336","display_name":"Random wire antenna","level":5,"score":0.2567000091075897},{"id":"https://openalex.org/C128975484","wikidata":"https://www.wikidata.org/wiki/Q3492872","display_name":"Angular spectrum method","level":3,"score":0.2531000077724457},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.25060001015663147}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/twc.2025.3615506","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2025.3615506","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"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 Transactions on Wireless Communications","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1109/twc.2025.3615506","is_oa":true,"landing_page_url":"https://doi.org/10.1109/twc.2025.3615506","pdf_url":null,"source":{"id":"https://openalex.org/S63459445","display_name":"IEEE Transactions on Wireless Communications","issn_l":"1536-1276","issn":["1536-1276","1558-2248"],"is_oa":false,"is_in_doaj":false,"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 Transactions on Wireless Communications","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":35,"referenced_works":["https://openalex.org/W608690979","https://openalex.org/W1528580396","https://openalex.org/W1965774046","https://openalex.org/W1979220847","https://openalex.org/W1997834106","https://openalex.org/W2038854086","https://openalex.org/W2054350147","https://openalex.org/W2054380687","https://openalex.org/W2089537951","https://openalex.org/W2096220188","https://openalex.org/W2097034408","https://openalex.org/W2103472722","https://openalex.org/W2111349248","https://openalex.org/W2124164696","https://openalex.org/W2152956325","https://openalex.org/W2169481269","https://openalex.org/W2333992245","https://openalex.org/W2786317177","https://openalex.org/W2890366100","https://openalex.org/W2910997245","https://openalex.org/W2938669437","https://openalex.org/W2941952571","https://openalex.org/W3012526041","https://openalex.org/W3042274457","https://openalex.org/W3135314630","https://openalex.org/W3139458362","https://openalex.org/W3147919432","https://openalex.org/W3163598197","https://openalex.org/W4200501810","https://openalex.org/W4226163602","https://openalex.org/W4312318199","https://openalex.org/W4312915481","https://openalex.org/W4385656566","https://openalex.org/W4386824745","https://openalex.org/W4397026566"],"related_works":[],"abstract_inverted_index":{"This":[0],"paper":[1,248],"models":[2],"the":[3,27,30,35,38,52,61,66,84,88,128,138,171,189,193,206,214,223,230,235,256],"line-of-sight":[4],"(LOS)":[5],"channel":[6,154],"between":[7],"two":[8,97],"continuous":[9],"circular":[10,72,107],"antennas":[11,102,132,196,209],"(CCAs)":[12],"as":[13,51],"a":[14,24,104,111,218],"bounded":[15],"linear":[16],"normal":[17],"operator":[18],"whose":[19],"kernel":[20],"is":[21,197,210],"defined":[22],"by":[23,34,57],"deployment":[25,67,172,190],"parameter:":[26],"product":[28,36],"of":[29,37,60,87,130,137,162,166,195,208,221,226,237],"antenna":[31],"radii":[32],"divided":[33],"wavelength":[39],"and":[40,115,234],"transmission":[41],"distance.":[42],"Eigendecomposition":[43],"reveals":[44],"that":[45],"orbital":[46],"angular":[47,113,122,179,238,260],"momentum":[48],"(OAM)":[49],"serves":[50],"eigenmodes,":[53],"with":[54,110,117,127,170,188],"eigenvalues":[55],"given":[56],"Bessel":[58],"functions":[59],"first":[62],"kind,":[63],"evaluated":[64],"at":[65],"parameter.":[68],"By":[69],"linking":[70],"discrete":[71,144],"arrays":[73],"to":[74,152,213,255],"CCAs":[75],"through":[76],"spatial":[77,164],"sampling,":[78],"we":[79],"derive":[80],"analytical":[81],"expressions":[82],"for":[83],"singular":[85,224,232],"values":[86,225],"LOS":[89],"multiple-input":[90],"multiple-output":[91],"(MIMO)":[92],"channel.":[93],"The":[94,160,242],"analysis":[95],"considers":[96],"configurations:":[98],"one":[99,116],"where":[100],"receive":[101,131],"form":[103],"single":[105],"uniform":[106,257],"array":[108],"(UCA)":[109],"rotational":[112],"offset,":[114],"multiple":[118,136],"sub-UCAs":[119],"having":[120],"different":[121],"offsets,":[123],"in":[124,246],"both":[125,227],"cases":[126],"number":[129,161,194,207,220],"being":[133],"an":[134],"integer":[135],"transmit":[139],"antennas.":[140],"For":[141],"each":[142],"setup,":[143],"Fourier":[145],"transform":[146],"(DFT)-based":[147],"transceiver":[148],"structures":[149],"are":[150,262],"proposed":[151],"achieve":[153],"capacity.":[155],"Numerical":[156],"evaluations":[157],"reveal:":[158],"(i)":[159],"effective":[163],"degrees":[165],"freedom":[167],"generally":[168],"increases":[169],"parameter,":[173],"but":[174],"not":[175,185],"monotonically":[176],"(for":[177],"fixed":[178],"offsets);":[180],"(ii)":[181],"Channel":[182],"capacity":[183],"does":[184],"necessarily":[186],"increase":[187],"parameter":[191],"when":[192,205,259],"fixed;":[198],"(iii)":[199],"Angular":[200],"offset":[201],"significantly":[202],"impacts":[203],"performance":[204],"small":[211,250],"relative":[212],"parameter;":[215],"(iv)":[216],"With":[217],"large":[219],"antennas,":[222],"configurations":[228],"approach":[229],"CCA":[231],"values,":[233],"impact":[236],"offsets":[239,261],"diminishes;":[240],"(v)":[241],"non-uniform":[243],"configuration":[244,258],"studied":[245],"this":[247],"yield":[249],"or":[251],"no":[252],"gains":[253],"compared":[254],"optimized.":[263]},"counts_by_year":[],"updated_date":"2026-03-27T05:58:40.876381","created_date":"2025-10-10T00:00:00"}
