{"id":"https://openalex.org/W4416010908","doi":"https://doi.org/10.1109/lcomm.2025.3630271","title":"Phase-Slope Pilot-Aided Channel Estimation for OTFS-Based Multiple Access Systems in LEO Satellite Communications","display_name":"Phase-Slope Pilot-Aided Channel Estimation for OTFS-Based Multiple Access Systems in LEO Satellite Communications","publication_year":2025,"publication_date":"2025-11-07","ids":{"openalex":"https://openalex.org/W4416010908","doi":"https://doi.org/10.1109/lcomm.2025.3630271"},"language":null,"primary_location":{"id":"doi:10.1109/lcomm.2025.3630271","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3630271","pdf_url":null,"source":{"id":"https://openalex.org/S147316732","display_name":"IEEE Communications Letters","issn_l":"1089-7798","issn":["1089-7798","1558-2558","2373-7891"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Communications Letters","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010968982","display_name":"Xinjie Zhao","orcid":"https://orcid.org/0009-0008-0391-1973"},"institutions":[{"id":"https://openalex.org/I41198531","display_name":"Nanjing University of Posts and Telecommunications","ror":"https://ror.org/043bpky34","country_code":"CN","type":"education","lineage":["https://openalex.org/I41198531"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xinjie Zhao","raw_affiliation_strings":["Nanjing University of Posts and Telecommunications, Nanjing, China"],"raw_orcid":"https://orcid.org/0009-0008-0391-1973","affiliations":[{"raw_affiliation_string":"Nanjing University of Posts and Telecommunications, Nanjing, China","institution_ids":["https://openalex.org/I41198531"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100406056","display_name":"Ziwei Liu","orcid":"https://orcid.org/0000-0003-3246-315X"},"institutions":[{"id":"https://openalex.org/I41198531","display_name":"Nanjing University of Posts and Telecommunications","ror":"https://ror.org/043bpky34","country_code":"CN","type":"education","lineage":["https://openalex.org/I41198531"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ziwei Liu","raw_affiliation_strings":["Nanjing University of Posts and Telecommunications, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0003-3246-315X","affiliations":[{"raw_affiliation_string":"Nanjing University of Posts and Telecommunications, Nanjing, China","institution_ids":["https://openalex.org/I41198531"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044630013","display_name":"Bin Lyu","orcid":"https://orcid.org/0000-0001-5077-2576"},"institutions":[{"id":"https://openalex.org/I41198531","display_name":"Nanjing University of Posts and Telecommunications","ror":"https://ror.org/043bpky34","country_code":"CN","type":"education","lineage":["https://openalex.org/I41198531"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Bin Lyu","raw_affiliation_strings":["Nanjing University of Posts and Telecommunications, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0001-5077-2576","affiliations":[{"raw_affiliation_string":"Nanjing University of Posts and Telecommunications, Nanjing, China","institution_ids":["https://openalex.org/I41198531"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Yihan Du","orcid":"https://orcid.org/0009-0009-9882-895X"},"institutions":[{"id":"https://openalex.org/I41198531","display_name":"Nanjing University of Posts and Telecommunications","ror":"https://ror.org/043bpky34","country_code":"CN","type":"education","lineage":["https://openalex.org/I41198531"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yihan Du","raw_affiliation_strings":["Nanjing University of Posts and Telecommunications, Nanjing, China"],"raw_orcid":"https://orcid.org/0009-0009-9882-895X","affiliations":[{"raw_affiliation_string":"Nanjing University of Posts and Telecommunications, Nanjing, China","institution_ids":["https://openalex.org/I41198531"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101445073","display_name":"Gengxin Zhang","orcid":"https://orcid.org/0000-0001-7962-6695"},"institutions":[{"id":"https://openalex.org/I41198531","display_name":"Nanjing University of Posts and Telecommunications","ror":"https://ror.org/043bpky34","country_code":"CN","type":"education","lineage":["https://openalex.org/I41198531"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Gengxin Zhang","raw_affiliation_strings":["Nanjing University of Posts and Telecommunications, Nanjing, China"],"raw_orcid":"https://orcid.org/0000-0001-7962-6695","affiliations":[{"raw_affiliation_string":"Nanjing University of Posts and Telecommunications, Nanjing, China","institution_ids":["https://openalex.org/I41198531"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I41198531"],"apc_list":{"value":2645,"currency":"USD","value_usd":2645},"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.17656453,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"30","issue":null,"first_page":"95","last_page":"99"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11873","display_name":"PAPR reduction in OFDM","score":0.6977999806404114,"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/T11873","display_name":"PAPR reduction in OFDM","score":0.6977999806404114,"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/T12042","display_name":"Satellite Communication Systems","score":0.0843999981880188,"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/T10655","display_name":"GNSS positioning and interference","score":0.08179999887943268,"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/doppler-effect","display_name":"Doppler effect","score":0.746999979019165},{"id":"https://openalex.org/keywords/ambiguity-function","display_name":"Ambiguity function","score":0.6227999925613403},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.5751000046730042},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.5223000049591064},{"id":"https://openalex.org/keywords/residual","display_name":"Residual","score":0.4812999963760376},{"id":"https://openalex.org/keywords/satellite","display_name":"Satellite","score":0.476500004529953},{"id":"https://openalex.org/keywords/orthogonal-frequency-division-multiplexing","display_name":"Orthogonal frequency-division multiplexing","score":0.4275999963283539},{"id":"https://openalex.org/keywords/ambiguity","display_name":"Ambiguity","score":0.3903000056743622},{"id":"https://openalex.org/keywords/scheme","display_name":"Scheme (mathematics)","score":0.3625999987125397}],"concepts":[{"id":"https://openalex.org/C142757262","wikidata":"https://www.wikidata.org/wiki/Q76436","display_name":"Doppler effect","level":2,"score":0.746999979019165},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7027000188827515},{"id":"https://openalex.org/C50878840","wikidata":"https://www.wikidata.org/wiki/Q3206297","display_name":"Ambiguity function","level":4,"score":0.6227999925613403},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.5751000046730042},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5526999831199646},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.5223000049591064},{"id":"https://openalex.org/C155512373","wikidata":"https://www.wikidata.org/wiki/Q287450","display_name":"Residual","level":2,"score":0.4812999963760376},{"id":"https://openalex.org/C19269812","wikidata":"https://www.wikidata.org/wiki/Q26540","display_name":"Satellite","level":2,"score":0.476500004529953},{"id":"https://openalex.org/C40409654","wikidata":"https://www.wikidata.org/wiki/Q375889","display_name":"Orthogonal frequency-division multiplexing","level":3,"score":0.4275999963283539},{"id":"https://openalex.org/C2780522230","wikidata":"https://www.wikidata.org/wiki/Q1140419","display_name":"Ambiguity","level":2,"score":0.3903000056743622},{"id":"https://openalex.org/C77618280","wikidata":"https://www.wikidata.org/wiki/Q1155772","display_name":"Scheme (mathematics)","level":2,"score":0.3625999987125397},{"id":"https://openalex.org/C121308736","wikidata":"https://www.wikidata.org/wiki/Q149918","display_name":"Communications satellite","level":3,"score":0.3578000068664551},{"id":"https://openalex.org/C3018325918","wikidata":"https://www.wikidata.org/wiki/Q663611","display_name":"Low earth orbit","level":3,"score":0.34360000491142273},{"id":"https://openalex.org/C189950617","wikidata":"https://www.wikidata.org/wiki/Q937228","display_name":"Property (philosophy)","level":2,"score":0.33970001339912415},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.33899998664855957},{"id":"https://openalex.org/C159694833","wikidata":"https://www.wikidata.org/wiki/Q2321565","display_name":"Iterative method","level":2,"score":0.3361999988555908},{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.3357999920845032},{"id":"https://openalex.org/C117313154","wikidata":"https://www.wikidata.org/wiki/Q878344","display_name":"Time division multiple access","level":2,"score":0.33399999141693115},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.33059999346733093},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.3264000117778778},{"id":"https://openalex.org/C148063708","wikidata":"https://www.wikidata.org/wiki/Q5072511","display_name":"Channel state information","level":3,"score":0.3222000002861023},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.31450000405311584},{"id":"https://openalex.org/C14036430","wikidata":"https://www.wikidata.org/wiki/Q3736076","display_name":"Function (biology)","level":2,"score":0.30559998750686646},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.29679998755455017},{"id":"https://openalex.org/C196644772","wikidata":"https://www.wikidata.org/wiki/Q3884964","display_name":"Orbit (dynamics)","level":2,"score":0.2858999967575073},{"id":"https://openalex.org/C142433447","wikidata":"https://www.wikidata.org/wiki/Q7806653","display_name":"Time\u2013frequency analysis","level":3,"score":0.2847000062465668},{"id":"https://openalex.org/C60069766","wikidata":"https://www.wikidata.org/wiki/Q357054","display_name":"Antenna diversity","level":3,"score":0.2621000111103058},{"id":"https://openalex.org/C164785522","wikidata":"https://www.wikidata.org/wiki/Q5283966","display_name":"Diversity gain","level":4,"score":0.25699999928474426},{"id":"https://openalex.org/C101765175","wikidata":"https://www.wikidata.org/wiki/Q577764","display_name":"Communications system","level":2,"score":0.25440001487731934},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.25119999051094055}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/lcomm.2025.3630271","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3630271","pdf_url":null,"source":{"id":"https://openalex.org/S147316732","display_name":"IEEE Communications Letters","issn_l":"1089-7798","issn":["1089-7798","1558-2558","2373-7891"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310316002","host_organization_name":"IEEE Communications Society","host_organization_lineage":["https://openalex.org/P4310316002","https://openalex.org/P4310319808"],"host_organization_lineage_names":["IEEE Communications Society","Institute of Electrical and Electronics Engineers"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IEEE Communications Letters","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W2612254130","https://openalex.org/W2899131610","https://openalex.org/W2962951066","https://openalex.org/W2963961909","https://openalex.org/W2987993606","https://openalex.org/W3040500704","https://openalex.org/W3173471587","https://openalex.org/W3207045915","https://openalex.org/W4313175505","https://openalex.org/W4376455255","https://openalex.org/W4388544052","https://openalex.org/W4394994685","https://openalex.org/W4399728369","https://openalex.org/W4402156520"],"related_works":[],"abstract_inverted_index":{"The":[0,134],"interleaved":[1],"Delay-Doppler":[2],"orthogonal":[3,9],"multiple":[4],"access":[5],"(IDD-OMA)":[6],"scheme":[7,34,60,160],"for":[8,25,63],"time":[10],"frequency":[11],"space":[12],"(OTFS)":[13],"eliminates":[14],"multi-user":[15],"interference":[16],"while":[17],"maintaining":[18],"high":[19],"spectral":[20],"efficiency,":[21],"making":[22],"it":[23],"ideal":[24],"low":[26],"Earth":[27],"orbit":[28],"(LEO)":[29],"satellite":[30],"communications.":[31],"However,":[32],"this":[33,51,105],"reduces":[35],"the":[36,70,80,84,94,97,107,128,132,143,149,154,157],"time-frequency":[37],"(TF)":[38],"diversity":[39],"and":[40,66,96,110],"induces":[41],"Doppler":[42,65,78,86,122],"ambiguity":[43],"that":[44],"is":[45,61,89,124,161],"challenging":[46],"to":[47,75,116],"estimate.":[48],"To":[49,103],"overcome":[50],"challenge,":[52],"a":[53],"phase-slope":[54],"pilots-aided":[55],"convolutional":[56],"approximate":[57],"message-passing":[58],"(PSP-CAMP)":[59],"developed":[62],"ambiguous":[64,77,85,121],"channel":[67,136,151],"estimation.":[68],"Specifically,":[69],"PSP":[71,95,150],"are":[72,113,138],"first":[73],"introduced":[74],"ensure":[76],"within":[79],"estimable":[81],"range.":[82],"Then,":[83],"estimation":[87,123],"problem":[88],"formulated":[90],"by":[91,126,163],"exploiting":[92],"both":[93],"cyclic":[98],"shift":[99],"property":[100],"of":[101,148,156],"OTFS.":[102],"address":[104],"problem,":[106],"historical":[108],"residual":[109],"state":[111],"evolution":[112],"updated":[114],"iteratively":[115],"eliminate":[117],"inter-Doppler":[118],"interference.":[119],"Next,":[120],"achieved":[125],"integrating":[127],"iterative":[129],"results":[130],"with":[131],"PSP.":[133],"remaining":[135],"parameters":[137],"then":[139],"estimated":[140],"based":[141],"on":[142],"normalized":[144],"mean":[145],"correlation":[146],"function":[147],"response.":[152],"Finally,":[153],"effectiveness":[155],"proposed":[158],"PSP-CAMP":[159],"evaluated":[162],"simulation":[164],"results.":[165]},"counts_by_year":[],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2025-11-07T00:00:00"}