{"id":"https://openalex.org/W7139043257","doi":"https://doi.org/10.1109/globecom59602.2025.11431836","title":"Delay-Doppler ISAC: Ambiguity Function Analysis via Zak-OTFS Modulation","display_name":"Delay-Doppler ISAC: Ambiguity Function Analysis via Zak-OTFS Modulation","publication_year":2025,"publication_date":"2025-12-08","ids":{"openalex":"https://openalex.org/W7139043257","doi":"https://doi.org/10.1109/globecom59602.2025.11431836"},"language":"en","primary_location":{"id":"doi:10.1109/globecom59602.2025.11431836","is_oa":false,"landing_page_url":"https://doi.org/10.1109/globecom59602.2025.11431836","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2025 - 2025 IEEE Global Communications Conference","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://pure.qub.ac.uk/en/publications/2f11cfdf-6f9d-4360-ae8a-23052add57a6","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5062881585","display_name":"Ruoxi Chong","orcid":"https://orcid.org/0000-0002-3348-8124"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Ruoxi Chong","raw_affiliation_strings":["Queen’s University,Centre for Wireless Innovation (CWI),Belfast,U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Queen’s University,Centre for Wireless Innovation (CWI),Belfast,U.K","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5129828461","display_name":"Shuangyang Li","orcid":null},"institutions":[{"id":"https://openalex.org/I4577782","display_name":"Technische Universit\u00e4t Berlin","ror":"https://ror.org/03v4gjf40","country_code":"DE","type":"education","lineage":["https://openalex.org/I4577782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Shuangyang Li","raw_affiliation_strings":["Technical University of Berlin,Faculty of Electrical Engineering and Computer Science,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Berlin,Faculty of Electrical Engineering and Computer Science,Germany","institution_ids":["https://openalex.org/I4577782"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Fan Liu","orcid":null},"institutions":[{"id":"https://openalex.org/I76569877","display_name":"Southeast University","ror":"https://ror.org/04ct4d772","country_code":"CN","type":"education","lineage":["https://openalex.org/I76569877"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Fan Liu","raw_affiliation_strings":["Southeast University,National Mobile Communications Research Laboratory,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southeast University,National Mobile Communications Research Laboratory,China","institution_ids":["https://openalex.org/I76569877"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5069325952","display_name":"Yifeng Xiong","orcid":"https://orcid.org/0000-0002-4290-7116"},"institutions":[{"id":"https://openalex.org/I139759216","display_name":"Beijing University of Posts and Telecommunications","ror":"https://ror.org/04w9fbh59","country_code":"CN","type":"education","lineage":["https://openalex.org/I139759216"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yifeng Xiong","raw_affiliation_strings":["Beijing University of Posts and Telecommunications,School of Information and Communication Engineering,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Beijing University of Posts and Telecommunications,School of Information and Communication Engineering,China","institution_ids":["https://openalex.org/I139759216"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5129862668","display_name":"Weijie Yuan","orcid":null},"institutions":[{"id":"https://openalex.org/I3045169105","display_name":"Southern University of Science and Technology","ror":"https://ror.org/049tv2d57","country_code":"CN","type":"education","lineage":["https://openalex.org/I3045169105"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Weijie Yuan","raw_affiliation_strings":["Southern University of Science and Technology,School of System Design and Intelligent Manufacturing,China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Southern University of Science and Technology,School of System Design and Intelligent Manufacturing,China","institution_ids":["https://openalex.org/I3045169105"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5130201162","display_name":"Giuseppe Caire","orcid":null},"institutions":[{"id":"https://openalex.org/I4577782","display_name":"Technische Universit\u00e4t Berlin","ror":"https://ror.org/03v4gjf40","country_code":"DE","type":"education","lineage":["https://openalex.org/I4577782"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Giuseppe Caire","raw_affiliation_strings":["Technical University of Berlin,Faculty of Electrical Engineering and Computer Science,Germany"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Technical University of Berlin,Faculty of Electrical Engineering and Computer Science,Germany","institution_ids":["https://openalex.org/I4577782"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5130209036","display_name":"Michail Matthaiou","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Michail Matthaiou","raw_affiliation_strings":["Queen’s University,Centre for Wireless Innovation (CWI),Belfast,U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Queen’s University,Centre for Wireless Innovation (CWI),Belfast,U.K","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"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":"3207","last_page":"3212"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10891","display_name":"Radar Systems and Signal Processing","score":0.5512999892234802,"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"}},"topics":[{"id":"https://openalex.org/T10891","display_name":"Radar Systems and Signal Processing","score":0.5512999892234802,"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/T11873","display_name":"PAPR reduction in OFDM","score":0.18310000002384186,"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/T10500","display_name":"Sparse and Compressive Sensing Techniques","score":0.05169999971985817,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"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/ambiguity-function","display_name":"Ambiguity function","score":0.7246000170707703},{"id":"https://openalex.org/keywords/ambiguity","display_name":"Ambiguity","score":0.5752000212669373},{"id":"https://openalex.org/keywords/doppler-effect","display_name":"Doppler effect","score":0.5088000297546387},{"id":"https://openalex.org/keywords/quadrature","display_name":"Quadrature (astronomy)","score":0.4896000027656555},{"id":"https://openalex.org/keywords/modulation","display_name":"Modulation (music)","score":0.44940000772476196},{"id":"https://openalex.org/keywords/function","display_name":"Function (biology)","score":0.4221000075340271},{"id":"https://openalex.org/keywords/keying","display_name":"Keying","score":0.40799999237060547},{"id":"https://openalex.org/keywords/topology","display_name":"Topology (electrical circuits)","score":0.3849000036716461},{"id":"https://openalex.org/keywords/constellation","display_name":"Constellation","score":0.3515999913215637}],"concepts":[{"id":"https://openalex.org/C50878840","wikidata":"https://www.wikidata.org/wiki/Q3206297","display_name":"Ambiguity function","level":4,"score":0.7246000170707703},{"id":"https://openalex.org/C2780522230","wikidata":"https://www.wikidata.org/wiki/Q1140419","display_name":"Ambiguity","level":2,"score":0.5752000212669373},{"id":"https://openalex.org/C142757262","wikidata":"https://www.wikidata.org/wiki/Q76436","display_name":"Doppler effect","level":2,"score":0.5088000297546387},{"id":"https://openalex.org/C62869609","wikidata":"https://www.wikidata.org/wiki/Q28137","display_name":"Quadrature (astronomy)","level":2,"score":0.4896000027656555},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4846999943256378},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.482699990272522},{"id":"https://openalex.org/C123079801","wikidata":"https://www.wikidata.org/wiki/Q750240","display_name":"Modulation (music)","level":2,"score":0.44940000772476196},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4259999990463257},{"id":"https://openalex.org/C14036430","wikidata":"https://www.wikidata.org/wiki/Q3736076","display_name":"Function (biology)","level":2,"score":0.4221000075340271},{"id":"https://openalex.org/C2776542216","wikidata":"https://www.wikidata.org/wiki/Q6398306","display_name":"Keying","level":2,"score":0.40799999237060547},{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.3849000036716461},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.35850000381469727},{"id":"https://openalex.org/C70352696","wikidata":"https://www.wikidata.org/wiki/Q8928","display_name":"Constellation","level":2,"score":0.3515999913215637},{"id":"https://openalex.org/C19118579","wikidata":"https://www.wikidata.org/wiki/Q786423","display_name":"Frequency domain","level":2,"score":0.3278000056743622},{"id":"https://openalex.org/C122123141","wikidata":"https://www.wikidata.org/wiki/Q176623","display_name":"Random variable","level":2,"score":0.31439998745918274},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.311599999666214},{"id":"https://openalex.org/C11930861","wikidata":"https://www.wikidata.org/wiki/Q181417","display_name":"Frequency modulation","level":3,"score":0.30489999055862427},{"id":"https://openalex.org/C104267543","wikidata":"https://www.wikidata.org/wiki/Q208163","display_name":"Signal processing","level":3,"score":0.29510000348091125},{"id":"https://openalex.org/C2776257435","wikidata":"https://www.wikidata.org/wiki/Q1576430","display_name":"Bandwidth (computing)","level":2,"score":0.28760001063346863},{"id":"https://openalex.org/C47446073","wikidata":"https://www.wikidata.org/wiki/Q5165890","display_name":"Control theory (sociology)","level":3,"score":0.28619998693466187},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.27900001406669617},{"id":"https://openalex.org/C103824480","wikidata":"https://www.wikidata.org/wiki/Q185889","display_name":"Time domain","level":2,"score":0.26660001277923584},{"id":"https://openalex.org/C32409245","wikidata":"https://www.wikidata.org/wiki/Q749753","display_name":"Quadrature amplitude modulation","level":4,"score":0.2630000114440918},{"id":"https://openalex.org/C2778112365","wikidata":"https://www.wikidata.org/wiki/Q3511065","display_name":"Sequence (biology)","level":2,"score":0.2628999948501587},{"id":"https://openalex.org/C36503486","wikidata":"https://www.wikidata.org/wiki/Q11235244","display_name":"Domain (mathematical analysis)","level":2,"score":0.2605000138282776},{"id":"https://openalex.org/C197055811","wikidata":"https://www.wikidata.org/wiki/Q207522","display_name":"Probability density function","level":2,"score":0.2542000114917755},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.2526000142097473}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/globecom59602.2025.11431836","is_oa":false,"landing_page_url":"https://doi.org/10.1109/globecom59602.2025.11431836","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"GLOBECOM 2025 - 2025 IEEE Global Communications Conference","raw_type":"proceedings-article"},{"id":"pmh:oai:pure.qub.ac.uk/portal:openaire/2f11cfdf-6f9d-4360-ae8a-23052add57a6","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/2f11cfdf-6f9d-4360-ae8a-23052add57a6","pdf_url":null,"source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Chong, R, Li, S, Liu, F, Xiong, Y, Yuan, W, Caire, G & Matthaiou, M 2026, Delay-Doppler ISAC: Ambiguity function analysis via Zak-OTFS modulation. in 2025 IEEE Global Communications Conference (GLOBECOM): Proceedings. IEEE Global Communications Conference (GLOBECOM): Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 3207-3212, IEEE Global Communications Conference (GLOBECOM) 2025, Taipei, Taiwan, 08/12/2025. https://doi.org/10.1109/GLOBECOM59602.2025.11431836","raw_type":"info:eu-repo/semantics/conferenceObject"}],"best_oa_location":{"id":"pmh:oai:pure.qub.ac.uk/portal:openaire/2f11cfdf-6f9d-4360-ae8a-23052add57a6","is_oa":true,"landing_page_url":"https://pure.qub.ac.uk/en/publications/2f11cfdf-6f9d-4360-ae8a-23052add57a6","pdf_url":null,"source":{"id":"https://openalex.org/S4306402319","display_name":"Research Portal (Queen's University Belfast)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I126231945","host_organization_name":"Queen's University Belfast","host_organization_lineage":["https://openalex.org/I126231945"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Chong, R, Li, S, Liu, F, Xiong, Y, Yuan, W, Caire, G & Matthaiou, M 2026, Delay-Doppler ISAC: Ambiguity function analysis via Zak-OTFS modulation. in 2025 IEEE Global Communications Conference (GLOBECOM): Proceedings. IEEE Global Communications Conference (GLOBECOM): Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 3207-3212, IEEE Global Communications Conference (GLOBECOM) 2025, Taipei, Taiwan, 08/12/2025. https://doi.org/10.1109/GLOBECOM59602.2025.11431836","raw_type":"info:eu-repo/semantics/conferenceObject"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W2769776241","https://openalex.org/W2888002205","https://openalex.org/W2974511635","https://openalex.org/W3006143078","https://openalex.org/W3033820925","https://openalex.org/W3203702019","https://openalex.org/W4206924922","https://openalex.org/W4312285158","https://openalex.org/W4321021117","https://openalex.org/W4379983385","https://openalex.org/W4384789136","https://openalex.org/W4387092289","https://openalex.org/W4401628466","https://openalex.org/W4402263751","https://openalex.org/W4404871637","https://openalex.org/W4409581480","https://openalex.org/W4411358672","https://openalex.org/W4412722079"],"related_works":[],"abstract_inverted_index":{"This":[0],"paper":[1],"investigates":[2],"an":[3],"integrated":[4],"sensing":[5,15],"and":[6,20,77,114,124],"communication":[7],"(ISAC)":[8],"system":[9],"employing":[10],"delay-Doppler":[11],"(DD)":[12],"signaling.":[13],"The":[14,127],"performance":[16],"of":[17,122],"both":[18],"random":[19,86],"deterministic":[21,67],"signaling":[22,60,68,87],"schemes":[23],"is":[24],"evaluated":[25],"based":[26],"on":[27],"the":[28,42,58,120],"expected":[29],"squared":[30],"ambiguity":[31],"function":[32],"(AF),":[33],"for":[34],"which":[35],"closed-form":[36],"expressions":[37],"are":[38,130],"derived":[39],"by":[40,118],"leveraging":[41],"Zak":[43],"transform-based":[44],"orthogonal":[45],"time-frequency":[46],"space":[47],"(Zak-OTFS)":[48],"modulation":[49],"framework.":[50],"Our":[51],"analysis":[52],"highlights":[53],"a":[54,70,89,109],"key":[55],"difference":[56],"between":[57,80,112],"two":[59],"types:":[61],"DD":[62],"domain":[63],"ISAC":[64],"(DD-ISAC)":[65],"with":[66,74,85],"yields":[69],"roughly":[71],"periodic":[72],"AF":[73],"prominent":[75,101],"peaks":[76],"low":[78,96],"sidelobes":[79],"adjacent":[81],"peaks,":[82],"whereas":[83],"DD-ISAC":[84,107],"using":[88],"Quadrature":[90],"Phase-Shift":[91],"Keying":[92],"(QPSK)":[93],"constellation":[94],"exhibits":[95],"sidelobe":[97,116],"values":[98],"periodically":[99],"without":[100],"peaks.":[102],"Furthermore,":[103],"we":[104],"demonstrate":[105],"that":[106],"enables":[108],"flexible":[110],"trade-off":[111],"delay":[113,123],"Doppler":[115,125],"levels":[117],"adjusting":[119],"number":[121],"bins.":[126],"analytical":[128],"findings":[129],"explicitly":[131],"validated":[132],"through":[133],"numerical":[134],"simulations.":[135]},"counts_by_year":[],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2026-03-20T00:00:00"}