{"id":"https://openalex.org/W7170194491","doi":"https://doi.org/10.48550/arxiv.2607.20200","title":"Fundamental Limits of MIMO ISAC: An Antenna Array Architecture Perspective","display_name":"Fundamental Limits of MIMO ISAC: An Antenna Array Architecture Perspective","publication_year":2026,"publication_date":"2026-07-22","ids":{"openalex":"https://openalex.org/W7170194491","doi":"https://doi.org/10.48550/arxiv.2607.20200"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2607.20200","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2607.20200","pdf_url":"https://arxiv.org/pdf/2607.20200","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"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"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2607.20200","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5059050006","display_name":"Po\u2010Chih Chen","orcid":"https://orcid.org/0000-0003-1637-9329","observed_orcids":["https://orcid.org/0000-0003-1637-9329"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Chen, Po-Chih","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5143489113","display_name":"Ming-Chun Lee","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Lee, Ming-Chun","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5082244371","display_name":"Yu-Chih Huang","orcid":"https://orcid.org/0000-0003-2135-1232","observed_orcids":["https://orcid.org/0000-0003-2135-1232"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Huang, Yu-Chih","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"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/T10931","display_name":"Direction-of-Arrival Estimation Techniques","score":0.8734999895095825,"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"}},"topics":[{"id":"https://openalex.org/T10931","display_name":"Direction-of-Arrival Estimation Techniques","score":0.8734999895095825,"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"}},{"id":"https://openalex.org/T10891","display_name":"Radar Systems and Signal Processing","score":0.07000000029802322,"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/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.007300000172108412,"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/sparse-antenna-arrays","display_name":"sparse antenna arrays","score":0.8709999918937683},{"id":"https://openalex.org/keywords/uniform-linear-array","display_name":"uniform linear array","score":0.9779999852180481},{"id":"https://openalex.org/keywords/ergodic-capacity","display_name":"ergodic capacity","score":0.8930000066757202},{"id":"https://openalex.org/keywords/cramer-rao-lower-bound","display_name":"Cramer-Rao lower bound","score":0.9010000228881836},{"id":"https://openalex.org/keywords/angle-estimation","display_name":"angle estimation","score":0.8870000243186951},{"id":"https://openalex.org/keywords/array-geometry","display_name":"array geometry","score":0.6309999823570251},{"id":"https://openalex.org/keywords/orthogonal-time-frequency-space","display_name":"orthogonal time frequency space","score":0.8090000152587891},{"id":"https://openalex.org/keywords/ofdm","display_name":"OFDM","score":0.9089999794960022},{"id":"https://openalex.org/keywords/fundamental-performance-limits","display_name":"fundamental performance limits","score":0.6909999847412109}],"concepts":[{"id":"https://openalex.org/C161218011","wikidata":"https://www.wikidata.org/wiki/Q11827794","display_name":"Multipath propagation","level":3,"score":0.6624000072479248},{"id":"https://openalex.org/C21822782","wikidata":"https://www.wikidata.org/wiki/Q131214","display_name":"Antenna (radio)","level":2,"score":0.5733000040054321},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5396999716758728},{"id":"https://openalex.org/C12713177","wikidata":"https://www.wikidata.org/wiki/Q1900281","display_name":"Perspective (graphical)","level":2,"score":0.5142999887466431},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.46320000290870667},{"id":"https://openalex.org/C179254644","wikidata":"https://www.wikidata.org/wiki/Q13222844","display_name":"Moment (physics)","level":2,"score":0.43939998745918274},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.4101000130176544},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.40700000524520874},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.4058000147342682},{"id":"https://openalex.org/C62191587","wikidata":"https://www.wikidata.org/wiki/Q4771249","display_name":"Antenna array","level":3,"score":0.39989998936653137},{"id":"https://openalex.org/C2776639384","wikidata":"https://www.wikidata.org/wiki/Q840396","display_name":"Ideal (ethics)","level":2,"score":0.38359999656677246},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.38280001282691956},{"id":"https://openalex.org/C123079801","wikidata":"https://www.wikidata.org/wiki/Q750240","display_name":"Modulation (music)","level":2,"score":0.36640000343322754},{"id":"https://openalex.org/C77553402","wikidata":"https://www.wikidata.org/wiki/Q13222579","display_name":"Upper and lower bounds","level":2,"score":0.3456000089645386},{"id":"https://openalex.org/C142757262","wikidata":"https://www.wikidata.org/wiki/Q76436","display_name":"Doppler effect","level":2,"score":0.3450999855995178},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.329800009727478},{"id":"https://openalex.org/C155050386","wikidata":"https://www.wikidata.org/wiki/Q1068623","display_name":"Antenna height considerations","level":3,"score":0.31380000710487366},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.3125999867916107},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.3107999861240387},{"id":"https://openalex.org/C122044880","wikidata":"https://www.wikidata.org/wiki/Q5498822","display_name":"Ergodic theory","level":2,"score":0.3034000098705292},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.29330000281333923},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.28850001096725464},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.28029999136924744},{"id":"https://openalex.org/C97744766","wikidata":"https://www.wikidata.org/wiki/Q870845","display_name":"Channel capacity","level":3,"score":0.27480000257492065},{"id":"https://openalex.org/C13944312","wikidata":"https://www.wikidata.org/wiki/Q7512748","display_name":"Signal-to-noise ratio (imaging)","level":2,"score":0.27459999918937683},{"id":"https://openalex.org/C135692309","wikidata":"https://www.wikidata.org/wiki/Q111124","display_name":"Square (algebra)","level":2,"score":0.2694000005722046},{"id":"https://openalex.org/C100921725","wikidata":"https://www.wikidata.org/wiki/Q1650811","display_name":"Spatial frequency","level":2,"score":0.26409998536109924},{"id":"https://openalex.org/C66251956","wikidata":"https://www.wikidata.org/wiki/Q7451086","display_name":"Sensor array","level":2,"score":0.2621999979019165},{"id":"https://openalex.org/C151201525","wikidata":"https://www.wikidata.org/wiki/Q177239","display_name":"Limit (mathematics)","level":2,"score":0.2506999969482422}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2607.20200","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2607.20200","pdf_url":"https://arxiv.org/pdf/2607.20200","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"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":"doi:10.48550/arxiv.2607.20200","doi":"https://doi.org/10.48550/arxiv.2607.20200","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2607.20200","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"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":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2607.20200","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2607.20200","pdf_url":"https://arxiv.org/pdf/2607.20200","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"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":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7170194491.pdf","grobid_xml":"https://content.openalex.org/works/W7170194491.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4408859258","https://openalex.org/W7160670554","https://openalex.org/W7160237465","https://openalex.org/W7213516517","https://openalex.org/W4404485010","https://openalex.org/W4319303224","https://openalex.org/W4407020918","https://openalex.org/W4410229621","https://openalex.org/W4288391570","https://openalex.org/W4408519599"],"abstract_inverted_index":{"This":[0],"paper":[1,83],"investigates":[2],"the":[3,34,46,50,55,73,82,86,93,111,114,139,153,161],"fundamental":[4,157],"limits":[5],"of":[6,29,52,98,113,116,156],"MIMO":[7,134],"integrated":[8],"sensing":[9],"and":[10,33,76,125,143],"communications":[11],"(ISAC)":[12],"systems,":[13],"specifically":[14],"comparing":[15],"sparse":[16],"arrays":[17,23],"(SAs)":[18],"against":[19],"conventional":[20],"uniform":[21],"linear":[22],"(ULAs).":[24],"A":[25],"unified":[26],"theoretical":[27],"analysis":[28],"ergodic":[30],"channel":[31],"capacity":[32],"Cram\u00e9r$\\unicode{x2013}$Rao":[35],"bound":[36],"(CRB)":[37],"for":[38,45,133],"angle":[39,87],"estimation":[40],"is":[41,89,152],"developed":[42],"while":[43],"accounting":[44],"array":[47],"geometry.":[48],"Utilizing":[49],"framework":[51],"stochastic":[53],"majorization,":[54],"study":[56],"reveals":[57],"that":[58,85,103,146],"SAs":[59,104],"consistently":[60],"outperform":[61],"ULAs":[62],"by":[63,108],"creating":[64],"a":[65],"more":[66],"$\\unicode{x201C}$uniform$\\unicode{x201D}$":[67],"spatial":[68,147,162],"eigenvalue":[69],"distribution,":[70],"which":[71],"decorrelates":[72],"multipath":[74],"environment":[75],"increases":[77],"communication":[78],"capacity.":[79],"For":[80],"sensing,":[81],"proves":[84],"CRB":[88],"inversely":[90],"proportional":[91],"to":[92,110,118,129],"array's":[94],"second-order":[95],"central":[96],"moment":[97],"antenna":[99],"positions":[100],"asymptotically,":[101],"demonstrating":[102],"achieve":[105],"superior":[106],"accuracy$\\unicode{x2014}$improving":[107],"up":[109],"square":[112],"number":[115],"antennas$\\unicode{x2014}$due":[117],"their":[119],"increased":[120],"physical":[121],"aperture.":[122],"These":[123],"analyses":[124],"conclusions":[126],"are":[127],"demonstrated":[128],"be":[130],"also":[131],"valid":[132],"ISAC":[135],"systems":[136],"employed":[137],"with":[138],"modern":[140],"waveforms":[141],"OTFS":[142],"OFDM,":[144],"suggesting":[145],"geometry,":[148],"rather":[149],"than":[150],"waveform,":[151],"primary":[154],"driver":[155],"performance":[158],"gains":[159],"in":[160],"dimension.":[163]},"counts_by_year":[],"updated_date":"2026-11-06T12:05:46.655746","created_date":"2026-07-24T00:00:00"}
