{"id":"https://openalex.org/W3036440324","doi":"https://doi.org/10.1109/wcnc45663.2020.9120664","title":"Compressive Sensing based User Activity Detection and Channel Estimation in Uplink NOMA Systems","display_name":"Compressive Sensing based User Activity Detection and Channel Estimation in Uplink NOMA Systems","publication_year":2020,"publication_date":"2020-05-01","ids":{"openalex":"https://openalex.org/W3036440324","doi":"https://doi.org/10.1109/wcnc45663.2020.9120664","mag":"3036440324"},"language":"en","primary_location":{"id":"doi:10.1109/wcnc45663.2020.9120664","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc45663.2020.9120664","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2020 IEEE Wireless Communications and Networking Conference (WCNC)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5050100483","display_name":"Yuanchen Wang","orcid":"https://orcid.org/0000-0003-4283-6896"},"institutions":[{"id":"https://openalex.org/I146655781","display_name":"University of Liverpool","ror":"https://ror.org/04xs57h96","country_code":"GB","type":"education","lineage":["https://openalex.org/I146655781"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Yuanchen Wang","raw_affiliation_strings":["Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K","institution_ids":["https://openalex.org/I146655781"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5064534354","display_name":"Xu Zhu","orcid":"https://orcid.org/0000-0003-1287-1623"},"institutions":[{"id":"https://openalex.org/I146655781","display_name":"University of Liverpool","ror":"https://ror.org/04xs57h96","country_code":"GB","type":"education","lineage":["https://openalex.org/I146655781"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Xu Zhu","raw_affiliation_strings":["Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K","institution_ids":["https://openalex.org/I146655781"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5033755146","display_name":"Eng Gee Lim","orcid":"https://orcid.org/0000-0003-0199-7386"},"institutions":[{"id":"https://openalex.org/I69356397","display_name":"Xi\u2019an Jiaotong-Liverpool University","ror":"https://ror.org/03zmrmn05","country_code":"CN","type":"education","lineage":["https://openalex.org/I69356397"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Eng Gee Lim","raw_affiliation_strings":["Department of Electrical and Electronic Engineering, Xi\u2019an Jiaotong-Liverpool University, Suzhou, P. R. China","Department of Electrical and Electronic Engineering, Xi'an Jiaotong-Liverpool University, Suzhou, P. R. China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Electronic Engineering, Xi\u2019an Jiaotong-Liverpool University, Suzhou, P. R. China","institution_ids":["https://openalex.org/I69356397"]},{"raw_affiliation_string":"Department of Electrical and Electronic Engineering, Xi'an Jiaotong-Liverpool University, Suzhou, P. R. China","institution_ids":["https://openalex.org/I69356397"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034778772","display_name":"Zhongxiang Wei","orcid":"https://orcid.org/0000-0003-0584-5566"},"institutions":[{"id":"https://openalex.org/I45129253","display_name":"University College London","ror":"https://ror.org/02jx3x895","country_code":"GB","type":"education","lineage":["https://openalex.org/I124357947","https://openalex.org/I45129253"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Zhongxiang Wei","raw_affiliation_strings":["Department of Electrical and Electronics Engineering, University College London, London, U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical and Electronics Engineering, University College London, London, U.K","institution_ids":["https://openalex.org/I45129253"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100454958","display_name":"Yujie Liu","orcid":"https://orcid.org/0000-0003-0437-7289"},"institutions":[{"id":"https://openalex.org/I146655781","display_name":"University of Liverpool","ror":"https://ror.org/04xs57h96","country_code":"GB","type":"education","lineage":["https://openalex.org/I146655781"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Yujie Liu","raw_affiliation_strings":["Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.K","institution_ids":["https://openalex.org/I146655781"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5071060953","display_name":"Yufei Jiang","orcid":"https://orcid.org/0000-0003-0523-8117"},"institutions":[{"id":"https://openalex.org/I204983213","display_name":"Harbin Institute of Technology","ror":"https://ror.org/01yqg2h08","country_code":"CN","type":"education","lineage":["https://openalex.org/I204983213"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Yufei Jiang","raw_affiliation_strings":["School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen, P. R. China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen, P. R. China","institution_ids":["https://openalex.org/I204983213"]}]}],"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":10,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"6"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.9998999834060669,"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/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.9998999834060669,"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/T10326","display_name":"Indoor and Outdoor Localization Technologies","score":0.9998000264167786,"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":0.9998000264167786,"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/noma","display_name":"Noma","score":0.8155840635299683},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7902005314826965},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7696571350097656},{"id":"https://openalex.org/keywords/compressed-sensing","display_name":"Compressed sensing","score":0.6749489307403564},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6612105369567871},{"id":"https://openalex.org/keywords/overhead","display_name":"Overhead (engineering)","score":0.5308060646057129},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4515605568885803},{"id":"https://openalex.org/keywords/signal-to-noise-ratio","display_name":"Signal-to-noise ratio (imaging)","score":0.44791918992996216},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.38108932971954346},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.30007895827293396},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.18105214834213257}],"concepts":[{"id":"https://openalex.org/C2775918612","wikidata":"https://www.wikidata.org/wiki/Q994794","display_name":"Noma","level":3,"score":0.8155840635299683},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7902005314826965},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7696571350097656},{"id":"https://openalex.org/C124851039","wikidata":"https://www.wikidata.org/wiki/Q2665459","display_name":"Compressed sensing","level":2,"score":0.6749489307403564},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6612105369567871},{"id":"https://openalex.org/C2779960059","wikidata":"https://www.wikidata.org/wiki/Q7113681","display_name":"Overhead (engineering)","level":2,"score":0.5308060646057129},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4515605568885803},{"id":"https://openalex.org/C13944312","wikidata":"https://www.wikidata.org/wiki/Q7512748","display_name":"Signal-to-noise ratio (imaging)","level":2,"score":0.44791918992996216},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.38108932971954346},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.30007895827293396},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.18105214834213257},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/wcnc45663.2020.9120664","is_oa":false,"landing_page_url":"https://doi.org/10.1109/wcnc45663.2020.9120664","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2020 IEEE Wireless Communications and Networking Conference (WCNC)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":20,"referenced_works":["https://openalex.org/W1543985333","https://openalex.org/W2114103671","https://openalex.org/W2127271355","https://openalex.org/W2212063709","https://openalex.org/W2289917018","https://openalex.org/W2344857408","https://openalex.org/W2508031406","https://openalex.org/W2520511335","https://openalex.org/W2763271663","https://openalex.org/W2802495557","https://openalex.org/W2884333066","https://openalex.org/W2885744840","https://openalex.org/W2905459276","https://openalex.org/W2907254442","https://openalex.org/W2917005045","https://openalex.org/W2927881074","https://openalex.org/W2929521712","https://openalex.org/W2956151454","https://openalex.org/W2962855623","https://openalex.org/W2963452556"],"related_works":["https://openalex.org/W3030525848","https://openalex.org/W4385197910","https://openalex.org/W2340639785","https://openalex.org/W3010814398","https://openalex.org/W3165611029","https://openalex.org/W2370038111","https://openalex.org/W3191669748","https://openalex.org/W2510978767","https://openalex.org/W4392158087","https://openalex.org/W2900836405"],"abstract_inverted_index":{"Conventional":[0],"request-grant":[1],"based":[2,82,94,125],"non-orthogonal":[3],"multiple":[4],"access":[5,16],"(NOMA)":[6],"incurs":[7],"tremendous":[8],"overhead":[9],"and":[10,66,83,91,95],"high":[11],"latency.":[12],"To":[13],"enable":[14],"grant-free":[15],"in":[17],"NOMA":[18],"systems,":[19],"user":[20],"activity":[21],"detection":[22],"(UAD)":[23],"is":[24,68],"essential.":[25],"In":[26],"this":[27],"paper,":[28],"we":[29,119],"investigate":[30],"compressive":[31],"sensing":[32],"(CS)":[33],"aided":[34],"UAD,":[35],"by":[36],"utilizing":[37],"the":[38,46,57,63,106,116,134],"property":[39],"of":[40,56,59],"quasi-time-invariant":[41],"channel":[42,85,126,136],"tap":[43,86],"delays":[44,87],"as":[45,80],"prior":[47,54],"information.":[48],"This":[49],"does":[50],"not":[51],"require":[52],"any":[53],"knowledge":[55],"number":[58],"active":[60],"users":[61],"like":[62],"previous":[64,107,135],"approaches,":[65],"therefore":[67],"more":[69],"practical.":[70],"Two":[71],"UAD":[72,103,117],"algorithms":[73],"are":[74,77],"proposed,":[75],"which":[76,129],"referred":[78],"to":[79],"gradient":[81],"time-invariant":[84],"assisted":[88],"CS":[89,124],"(g-TIDCS)":[90],"mean":[92],"value":[93],"TIDCS":[96],"(m-TIDCS),":[97],"respectively.":[98],"They":[99],"achieve":[100],"much":[101],"higher":[102,131],"accuracy":[104,132],"than":[105,133],"work":[108],"at":[109],"low":[110],"signal-to-noise":[111],"ratio":[112],"(SNR).":[113],"Based":[114],"on":[115],"results,":[118],"also":[120],"propose":[121],"a":[122],"low-complexity":[123],"estimation":[127,137],"scheme,":[128],"achieves":[130],"approaches.":[138]},"counts_by_year":[{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":4}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}
