{"id":"https://openalex.org/W7160262449","doi":"https://doi.org/10.48550/arxiv.2605.02388","title":"A Scalable 256-Antenna Distributed MIMO Testbed with Real-Time Fully Digital Beamforming","display_name":"A Scalable 256-Antenna Distributed MIMO Testbed with Real-Time Fully Digital Beamforming","publication_year":2026,"publication_date":"2026-05-04","ids":{"openalex":"https://openalex.org/W7160262449","doi":"https://doi.org/10.48550/arxiv.2605.02388"},"language":null,"primary_location":{"id":"doi:10.48550/arxiv.2605.02388","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2605.02388","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"},"type":"preprint","indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://doi.org/10.48550/arxiv.2605.02388","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5113528920","display_name":"D. Iancu","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Iancu, Dumitra","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5135406501","display_name":"Vilgot Snygg","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Snygg, Vilgot","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102422995","display_name":"Sijia Cheng","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Cheng, Sijia","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5114692195","display_name":"Lina Tinnerberg","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Tinnerberg, Lina","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5135302792","display_name":"Mikael Henriksson","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Henriksson, Mikael","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5135391588","display_name":"Emil Bergman","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Bergman, Emil","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035540837","display_name":"Anders J Johansson","orcid":"https://orcid.org/0000-0002-8351-4845"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Johansson, Anders J","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008206712","display_name":"Baktash Behmanesh","orcid":"https://orcid.org/0000-0002-2529-8291"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Behmanesh, Baktash","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5123201750","display_name":"Ove Edfors","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Edfors, Ove","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5135304561","display_name":"Liang Liu","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Liu, Liang","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":10,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.15309999883174896,"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":0.15309999883174896,"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":0.10920000076293945,"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"}},{"id":"https://openalex.org/T10931","display_name":"Direction-of-Arrival Estimation Techniques","score":0.10239999741315842,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/testbed","display_name":"Testbed","score":0.9243999719619751},{"id":"https://openalex.org/keywords/mimo","display_name":"MIMO","score":0.6477000117301941},{"id":"https://openalex.org/keywords/beamforming","display_name":"Beamforming","score":0.567799985408783},{"id":"https://openalex.org/keywords/scalability","display_name":"Scalability","score":0.5060999989509583},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.49799999594688416},{"id":"https://openalex.org/keywords/field-programmable-gate-array","display_name":"Field-programmable gate array","score":0.4453999996185303},{"id":"https://openalex.org/keywords/array-processing","display_name":"Array processing","score":0.43720000982284546},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.4296000003814697},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.41690000891685486}],"concepts":[{"id":"https://openalex.org/C31395832","wikidata":"https://www.wikidata.org/wiki/Q1318674","display_name":"Testbed","level":2,"score":0.9243999719619751},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6899999976158142},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6477000117301941},{"id":"https://openalex.org/C54197355","wikidata":"https://www.wikidata.org/wiki/Q5782992","display_name":"Beamforming","level":2,"score":0.567799985408783},{"id":"https://openalex.org/C48044578","wikidata":"https://www.wikidata.org/wiki/Q727490","display_name":"Scalability","level":2,"score":0.5060999989509583},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.49799999594688416},{"id":"https://openalex.org/C42935608","wikidata":"https://www.wikidata.org/wiki/Q190411","display_name":"Field-programmable gate array","level":2,"score":0.4453999996185303},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.43869999051094055},{"id":"https://openalex.org/C2778545087","wikidata":"https://www.wikidata.org/wiki/Q4795883","display_name":"Array processing","level":4,"score":0.43720000982284546},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.4296000003814697},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.41690000891685486},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.40799999237060547},{"id":"https://openalex.org/C104267543","wikidata":"https://www.wikidata.org/wiki/Q208163","display_name":"Signal processing","level":3,"score":0.4009999930858612},{"id":"https://openalex.org/C557945733","wikidata":"https://www.wikidata.org/wiki/Q389772","display_name":"Data transmission","level":2,"score":0.3977000117301941},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.39500001072883606},{"id":"https://openalex.org/C9390403","wikidata":"https://www.wikidata.org/wiki/Q3966","display_name":"Computer hardware","level":1,"score":0.3779999911785126},{"id":"https://openalex.org/C157764524","wikidata":"https://www.wikidata.org/wiki/Q1383412","display_name":"Throughput","level":3,"score":0.37599998712539673},{"id":"https://openalex.org/C2781089630","wikidata":"https://www.wikidata.org/wiki/Q21856745","display_name":"Realization (probability)","level":2,"score":0.37119999527931213},{"id":"https://openalex.org/C19275194","wikidata":"https://www.wikidata.org/wiki/Q222903","display_name":"Multiplexing","level":2,"score":0.3682999908924103},{"id":"https://openalex.org/C118524514","wikidata":"https://www.wikidata.org/wiki/Q173212","display_name":"Computer architecture","level":1,"score":0.36660000681877136},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.3287000060081482},{"id":"https://openalex.org/C126042441","wikidata":"https://www.wikidata.org/wiki/Q1324888","display_name":"Frame (networking)","level":2,"score":0.31630000472068787},{"id":"https://openalex.org/C120314980","wikidata":"https://www.wikidata.org/wiki/Q180634","display_name":"Distributed computing","level":1,"score":0.3098999857902527},{"id":"https://openalex.org/C84462506","wikidata":"https://www.wikidata.org/wiki/Q173142","display_name":"Digital signal processing","level":2,"score":0.2937999963760376},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.2815000116825104},{"id":"https://openalex.org/C50661577","wikidata":"https://www.wikidata.org/wiki/Q901831","display_name":"Time-division multiplexing","level":3,"score":0.2761000096797943},{"id":"https://openalex.org/C138827492","wikidata":"https://www.wikidata.org/wiki/Q6661985","display_name":"Data processing","level":2,"score":0.27300000190734863},{"id":"https://openalex.org/C85884896","wikidata":"https://www.wikidata.org/wiki/Q7574075","display_name":"Spatial multiplexing","level":4,"score":0.2694000005722046},{"id":"https://openalex.org/C106515295","wikidata":"https://www.wikidata.org/wiki/Q26806595","display_name":"Parallel processing","level":2,"score":0.2671999931335449},{"id":"https://openalex.org/C91330434","wikidata":"https://www.wikidata.org/wiki/Q738298","display_name":"Multi-user MIMO","level":4,"score":0.26109999418258667}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.48550/arxiv.2605.02388","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2605.02388","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":{"id":"doi:10.48550/arxiv.2605.02388","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2605.02388","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":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":[],"abstract_inverted_index":{"Distributed":[0],"massive":[1],"MIMO":[2,103],"(D-MIMO)":[3],"is":[4,49,96,115,124,159,193],"a":[5,24],"promising":[6],"technology":[7,55],"for":[8,200],"future":[9],"generation":[10],"wireless":[11],"systems":[12],"as":[13,90,118],"it":[14],"takes":[15],"advantage":[16],"of":[17,39,47,102,110,122,128,138,150,163,167,187,190],"both":[18],"an":[19,50,201],"increased":[20],"array":[21],"aperture":[22],"and":[23,28,37,100,195,214],"decentralized":[25],"processing":[26,92,95,104,140],"architecture":[27],"topology.":[29],"In":[30],"order":[31],"to":[32,73,211],"truly":[33],"understand":[34],"the":[35,54,60,107,111,120,170,188,191],"possibilities":[36],"limitations":[38],"these":[40],"approaches":[41],"in":[42,53,126,161,173,179],"real":[43],"scenarios,":[44],"practical":[45],"realization":[46],"testbeds":[48],"essential":[51],"step":[52],"advancement.":[56],"This":[57],"work":[58],"presents":[59],"Lund":[61],"University":[62],"Large":[63],"Intelligent":[64],"Surface":[65],"testbed":[66,158,192],"--":[67],"LuLIS,":[68],"that":[69],"can":[70],"operate":[71],"up":[72],"256":[74,215],"coherent":[75],"radio":[76],"frequency":[77],"(RF)":[78],"chains":[79],"using":[80],"16":[81,129],"AMD":[82],"Zynq":[83],"UltraScale":[84],"RFSoC":[85],"ZCU216":[86],"evaluation":[87],"boards":[88],"acting":[89],"distributed":[91],"nodes.":[93],"Real-time":[94],"facilitated":[97],"by":[98,130],"acceleration":[99],"distribution":[101],"algorithms":[105],"on":[106],"FPGA":[108],"fabric":[109],"boards.":[112],"The":[113,142,157],"system":[114],"easily":[116],"scalable,":[117],"increasing":[119],"number":[121],"antennas":[123],"done":[125],"multiples":[127],"adding":[131],"more":[132,180],"RFSoCs,":[133],"which":[134],"also":[135],"implies":[136],"addition":[137],"another":[139],"node.":[141],"design":[143],"allows":[144],"up-scaling":[145],"without":[146],"hardware":[147],"redesign,":[148],"introduction":[149],"large":[151],"latencies":[152],"or":[153,175],"data":[154],"transfer":[155],"overhead.":[156],"flexible":[160],"terms":[162],"deployment,":[164],"with":[165],"options":[166],"fully":[168],"distributing":[169],"nodes":[171],"(as":[172,178],"D-MIMO)":[174],"co-locating":[176],"them":[177],"traditional":[181],"Massive":[182],"MIMO).":[183],"A":[184],"detailed":[185],"description":[186],"implementation":[189],"presented":[194],"initial":[196],"results":[197],"are":[198],"shown":[199],"uplink":[202],"(UL)":[203],"transmission":[204],"from":[205],"four":[206],"single-antenna":[207],"user":[208],"equipments":[209],"(UEs)":[210],"64,":[212],"128":[213],"base-station":[216],"antennas.":[217]},"counts_by_year":[],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2026-05-06T00:00:00"}