{"id":"https://openalex.org/W4412081831","doi":"https://doi.org/10.1109/lcomm.2025.3586688","title":"Enhanced Adaptive Second-Order Grid Refinement Channel Estimation for OTFS Systems","display_name":"Enhanced Adaptive Second-Order Grid Refinement Channel Estimation for OTFS Systems","publication_year":2025,"publication_date":"2025-07-07","ids":{"openalex":"https://openalex.org/W4412081831","doi":"https://doi.org/10.1109/lcomm.2025.3586688"},"language":"en","primary_location":{"id":"doi:10.1109/lcomm.2025.3586688","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3586688","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/A5092017495","display_name":"Peng Liu","orcid":null},"institutions":[{"id":"https://openalex.org/I189210763","display_name":"Yunnan University","ror":"https://ror.org/0040axw97","country_code":"CN","type":"education","lineage":["https://openalex.org/I189210763"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Peng Liu","raw_affiliation_strings":["School of Information Science and Engineering, Yunnan University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Yunnan University, Kunming, China","institution_ids":["https://openalex.org/I189210763"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5042712985","display_name":"Meng Tang","orcid":"https://orcid.org/0000-0001-6518-5008"},"institutions":[{"id":"https://openalex.org/I189210763","display_name":"Yunnan University","ror":"https://ror.org/0040axw97","country_code":"CN","type":"education","lineage":["https://openalex.org/I189210763"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Meng Tang","raw_affiliation_strings":["School of Information Science and Engineering, Yunnan University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Yunnan University, Kunming, China","institution_ids":["https://openalex.org/I189210763"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5074415825","display_name":"Hao Wang","orcid":"https://orcid.org/0009-0007-6253-2546"},"institutions":[{"id":"https://openalex.org/I189210763","display_name":"Yunnan University","ror":"https://ror.org/0040axw97","country_code":"CN","type":"education","lineage":["https://openalex.org/I189210763"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Hao Wang","raw_affiliation_strings":["School of Information Science and Engineering, Yunnan University, Kunming, China"],"affiliations":[{"raw_affiliation_string":"School of Information Science and Engineering, Yunnan University, Kunming, China","institution_ids":["https://openalex.org/I189210763"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5092017495"],"corresponding_institution_ids":["https://openalex.org/I189210763"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.18023713,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"29","issue":"9","first_page":"2093","last_page":"2097"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11873","display_name":"PAPR reduction in OFDM","score":0.9961000084877014,"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":0.9961000084877014,"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/T10767","display_name":"Advanced Photonic Communication Systems","score":0.9858999848365784,"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/T10232","display_name":"Optical Network Technologies","score":0.9754999876022339,"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/channel","display_name":"Channel (broadcasting)","score":0.5727363228797913},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5704876780509949},{"id":"https://openalex.org/keywords/grid","display_name":"Grid","score":0.502577543258667},{"id":"https://openalex.org/keywords/order","display_name":"Order (exchange)","score":0.4245091378688812},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.40027284622192383},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.2833807170391083},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2330220341682434}],"concepts":[{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.5727363228797913},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5704876780509949},{"id":"https://openalex.org/C187691185","wikidata":"https://www.wikidata.org/wiki/Q2020720","display_name":"Grid","level":2,"score":0.502577543258667},{"id":"https://openalex.org/C182306322","wikidata":"https://www.wikidata.org/wiki/Q1779371","display_name":"Order (exchange)","level":2,"score":0.4245091378688812},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.40027284622192383},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.2833807170391083},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2330220341682434},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/lcomm.2025.3586688","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lcomm.2025.3586688","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":[{"display_name":"Affordable and clean energy","score":0.7099999785423279,"id":"https://metadata.un.org/sdg/7"}],"awards":[{"id":"https://openalex.org/G3906324933","display_name":null,"funder_award_id":"61861045","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"}],"funders":[{"id":"https://openalex.org/F4320321001","display_name":"National Natural Science Foundation of China","ror":"https://ror.org/01h0zpd94"}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W2065513175","https://openalex.org/W2152279006","https://openalex.org/W2323168390","https://openalex.org/W2888002205","https://openalex.org/W2950013137","https://openalex.org/W3082571270","https://openalex.org/W3120875796","https://openalex.org/W3189209457","https://openalex.org/W4391827279","https://openalex.org/W4394994380","https://openalex.org/W4403060877","https://openalex.org/W4406610706"],"related_works":["https://openalex.org/W4391375266","https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W2051487156","https://openalex.org/W2073681303","https://openalex.org/W2390279801","https://openalex.org/W4391913857","https://openalex.org/W2358668433","https://openalex.org/W4396701345","https://openalex.org/W2376932109"],"abstract_inverted_index":{"In":[0],"orthogonal":[1],"time":[2],"frequency":[3],"space":[4],"(OTFS)":[5],"modulation,":[6],"the":[7,11,22,25,58,63,74,95,99,105,111,122,133],"virtual":[8],"grid":[9,27,43,100,113],"in":[10,62],"delay-Doppler":[12],"(DD)":[13],"domain":[14],"is":[15,70,83],"critical":[16],"for":[17,86],"estimating":[18],"fractional":[19,60],"channel.":[20],"However,":[21],"resolution":[23],"of":[24,129],"DD":[26],"influences":[28],"both":[29],"algorithmic":[30],"complexity":[31],"and":[32,52,104],"channel":[33,61],"estimation":[34,89],"(CE)":[35],"performance.":[36],"This":[37],"letter":[38],"proposes":[39],"an":[40],"adaptive":[41],"second-order":[42,67],"refinement":[44],"(ASGR)":[45],"scheme,":[46],"which":[47],"effectively":[48],"balances":[49],"computational":[50,92],"efficiency":[51],"CE":[53],"precision.":[54],"To":[55],"accurately":[56],"estimate":[57],"doubly":[59],"OTFS":[64],"system,":[65],"a":[66,126],"Taylor":[68],"expansion":[69],"used":[71],"to":[72,90,114],"approximate":[73],"measurement":[75],"matrix.":[76],"A":[77],"fast":[78],"Bayesian":[79],"compressive":[80],"sensing":[81],"(FBCS)":[82],"then":[84],"employed":[85],"preliminary":[87],"hyperparameter":[88],"reduce":[91],"load.":[93],"Subsequently,":[94],"pivotal":[96],"parameters":[97],"on":[98],"are":[101,108],"adaptively":[102],"adjusted,":[103],"evolved":[106],"points":[107],"inserted":[109],"into":[110],"original":[112],"achieve":[115],"local":[116],"refinement.":[117],"Simulation":[118],"results":[119],"show":[120],"that":[121],"proposed":[123],"ASGR":[124],"achieves":[125],"performance":[127],"gain":[128],"4-6":[130],"dB":[131],"over":[132],"off-grid":[134],"FBCS.":[135]},"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}