{"id":"https://openalex.org/W3131272362","doi":"https://doi.org/10.1109/igarss39084.2020.9323622","title":"Expediting phase gradient autofocus algorithm for SAR imaging","display_name":"Expediting phase gradient autofocus algorithm for SAR imaging","publication_year":2020,"publication_date":"2020-09-26","ids":{"openalex":"https://openalex.org/W3131272362","doi":"https://doi.org/10.1109/igarss39084.2020.9323622","mag":"3131272362"},"language":"en","primary_location":{"id":"doi:10.1109/igarss39084.2020.9323622","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss39084.2020.9323622","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-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/A5011921680","display_name":"Tinghao Zhang","orcid":"https://orcid.org/0009-0008-6792-6701"},"institutions":[{"id":"https://openalex.org/I149594827","display_name":"Xidian University","ror":"https://ror.org/05s92vm98","country_code":"CN","type":"education","lineage":["https://openalex.org/I149594827"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Tinghao Zhang","raw_affiliation_strings":["National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071"],"affiliations":[{"raw_affiliation_string":"National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071","institution_ids":["https://openalex.org/I149594827"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5044356445","display_name":"Yachao Li","orcid":"https://orcid.org/0000-0002-6672-367X"},"institutions":[{"id":"https://openalex.org/I149594827","display_name":"Xidian University","ror":"https://ror.org/05s92vm98","country_code":"CN","type":"education","lineage":["https://openalex.org/I149594827"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yachao Li","raw_affiliation_strings":["National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071"],"affiliations":[{"raw_affiliation_string":"National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071","institution_ids":["https://openalex.org/I149594827"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100375832","display_name":"Tao Zhang","orcid":"https://orcid.org/0000-0002-7192-5153"},"institutions":[{"id":"https://openalex.org/I149594827","display_name":"Xidian University","ror":"https://ror.org/05s92vm98","country_code":"CN","type":"education","lineage":["https://openalex.org/I149594827"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Tao Zhang","raw_affiliation_strings":["National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071"],"affiliations":[{"raw_affiliation_string":"National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071","institution_ids":["https://openalex.org/I149594827"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5024106373","display_name":"Tong Gu","orcid":"https://orcid.org/0000-0003-1231-5766"},"institutions":[{"id":"https://openalex.org/I149594827","display_name":"Xidian University","ror":"https://ror.org/05s92vm98","country_code":"CN","type":"education","lineage":["https://openalex.org/I149594827"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Tong Gu","raw_affiliation_strings":["National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071"],"affiliations":[{"raw_affiliation_string":"National Laboratory of Radar Signal Processing, Xidian University,Xi'an,China,710071","institution_ids":["https://openalex.org/I149594827"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5011921680"],"corresponding_institution_ids":["https://openalex.org/I149594827"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.1016774,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":91,"max":95},"biblio":{"volume":null,"issue":null,"first_page":"1145","last_page":"1148"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9994000196456909,"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/T11038","display_name":"Advanced SAR Imaging Techniques","score":0.9994000196456909,"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/T10801","display_name":"Synthetic Aperture Radar (SAR) Applications and Techniques","score":0.9954000115394592,"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/T10662","display_name":"Ultrasonics and Acoustic Wave Propagation","score":0.9900000095367432,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"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/autofocus","display_name":"Autofocus","score":0.8487018942832947},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7239060997962952},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.659443736076355},{"id":"https://openalex.org/keywords/expediting","display_name":"Expediting","score":0.6533353924751282},{"id":"https://openalex.org/keywords/computational-complexity-theory","display_name":"Computational complexity theory","score":0.5132575035095215},{"id":"https://openalex.org/keywords/azimuth","display_name":"Azimuth","score":0.46626338362693787},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.37019360065460205},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.3277181088924408},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.25056612491607666},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.1315634548664093},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.08707249164581299},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.0825171172618866}],"concepts":[{"id":"https://openalex.org/C103764139","wikidata":"https://www.wikidata.org/wiki/Q210008","display_name":"Autofocus","level":3,"score":0.8487018942832947},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7239060997962952},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.659443736076355},{"id":"https://openalex.org/C134448949","wikidata":"https://www.wikidata.org/wiki/Q1384274","display_name":"Expediting","level":2,"score":0.6533353924751282},{"id":"https://openalex.org/C179799912","wikidata":"https://www.wikidata.org/wiki/Q205084","display_name":"Computational complexity theory","level":2,"score":0.5132575035095215},{"id":"https://openalex.org/C159737794","wikidata":"https://www.wikidata.org/wiki/Q124274","display_name":"Azimuth","level":2,"score":0.46626338362693787},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.37019360065460205},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.3277181088924408},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.25056612491607666},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.1315634548664093},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.08707249164581299},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.0825171172618866},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"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/C201995342","wikidata":"https://www.wikidata.org/wiki/Q682496","display_name":"Systems engineering","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/igarss39084.2020.9323622","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss39084.2020.9323622","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"IGARSS 2020 - 2020 IEEE International Geoscience and Remote Sensing Symposium","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320335787","display_name":"Fundamental Research Funds for the Central Universities","ror":null}],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":8,"referenced_works":["https://openalex.org/W2110965352","https://openalex.org/W2116008021","https://openalex.org/W2124562418","https://openalex.org/W2143070649","https://openalex.org/W2148525506","https://openalex.org/W2315448984","https://openalex.org/W2596046861","https://openalex.org/W2977601004"],"related_works":["https://openalex.org/W2024632604","https://openalex.org/W2085395339","https://openalex.org/W2071999521","https://openalex.org/W2068005943","https://openalex.org/W2010478499","https://openalex.org/W4317792299","https://openalex.org/W2050011582","https://openalex.org/W2071715249","https://openalex.org/W2051220639","https://openalex.org/W4285138054"],"abstract_inverted_index":{"Phase":[0],"gradient":[1,32],"autofocus":[2,33],"(PGA)":[3],"is":[4,35,62,101],"widely":[5],"used":[6],"in":[7,103],"estimating":[8],"residue":[9],"phase":[10,31,81],"error":[11,82],"due":[12],"to":[13,37],"its":[14,19],"efficient":[15],"and":[16,90,108],"robust.":[17],"However,":[18],"precision":[20],"severely":[21],"relies":[22],"on":[23,75],"sample":[24],"quality.":[25],"In":[26],"this":[27],"paper,":[28],"an":[29],"expediting":[30],"algorithm":[34],"proposed":[36],"solve":[38],"the":[39,50,55,58,68,71,76,80,98,114],"above":[40],"problem.":[41],"First,":[42],"we":[43],"extract":[44],"valid":[45],"echo":[46],"data":[47,111],"area":[48],"from":[49],"received":[51],"contaminated":[52],"data.":[53],"Second,":[54],"optimization":[56],"of":[57,67],"azimuth":[59],"window":[60],"size":[61],"presented.":[63],"It":[64],"gets":[65],"rid":[66],"limitation":[69],"that":[70,113],"traditional":[72],"PGA":[73],"depends":[74],"experience":[77],"value.":[78],"Third,":[79],"can":[83,117],"be":[84],"fast":[85],"calculated":[86],"without":[87],"numerous":[88],"IFFT":[89],"zero":[91],"padding":[92],"which":[93],"decrease":[94],"computational":[95,99],"complexity.":[96],"Furthermore,":[97],"cost":[100],"derived":[102],"detail.":[104],"Finally,":[105],"Numerical":[106],"simulation":[107],"raw":[109],"SAR":[110],"demonstrate":[112],"new":[115],"method":[116],"achieve":[118],"better":[119],"performance":[120],"than":[121],"conventional":[122],"PGA.":[123]},"counts_by_year":[{"year":2025,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}