{"id":"https://openalex.org/W2163477707","doi":"https://doi.org/10.1155/2013/676024","title":"Channel Estimation for Relay-Based M2M Two-Way Communications Using Expectation-Maximization","display_name":"Channel Estimation for Relay-Based M2M Two-Way Communications Using Expectation-Maximization","publication_year":2013,"publication_date":"2013-12-01","ids":{"openalex":"https://openalex.org/W2163477707","doi":"https://doi.org/10.1155/2013/676024","mag":"2163477707"},"language":"en","primary_location":{"id":"doi:10.1155/2013/676024","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2013/676024","pdf_url":null,"source":{"id":"https://openalex.org/S64417657","display_name":"International Journal of Distributed Sensor Networks","issn_l":"1550-1329","issn":["1550-1329","1550-1477"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Distributed Sensor Networks","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.1155/2013/676024","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5047611596","display_name":"Xiaoyan Xu","orcid":"https://orcid.org/0000-0001-5688-0252"},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xiaoyan Xu","raw_affiliation_strings":["State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China","institution_ids":["https://openalex.org/I20231570"]}]},{"author_position":"middle","author":{"id":null,"display_name":"Jianjun Wu","orcid":null},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Jianjun Wu","raw_affiliation_strings":["State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China","institution_ids":["https://openalex.org/I20231570"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100418336","display_name":"Chen Chen","orcid":"https://orcid.org/0000-0001-5058-6749"},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Chen Chen","raw_affiliation_strings":["State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China","institution_ids":["https://openalex.org/I20231570"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065167041","display_name":"Wenyang Guan","orcid":"https://orcid.org/0000-0001-5825-9048"},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Wenyang Guan","raw_affiliation_strings":["State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China"],"raw_orcid":"https://orcid.org/0000-0001-5825-9048","affiliations":[{"raw_affiliation_string":"State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China","institution_ids":["https://openalex.org/I20231570"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5101824600","display_name":"Haige Xiang","orcid":"https://orcid.org/0000-0001-7620-5326"},"institutions":[{"id":"https://openalex.org/I20231570","display_name":"Peking University","ror":"https://ror.org/02v51f717","country_code":"CN","type":"education","lineage":["https://openalex.org/I20231570"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Haige Xiang","raw_affiliation_strings":["State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China"],"raw_orcid":"https://orcid.org/0000-0001-7620-5326","affiliations":[{"raw_affiliation_string":"State Key Laboratory of Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China","institution_ids":["https://openalex.org/I20231570"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5100418336"],"corresponding_institution_ids":["https://openalex.org/I20231570"],"apc_list":{"value":2200,"currency":"USD","value_usd":2200},"apc_paid":{"value":2200,"currency":"USD","value_usd":2200},"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.16161579,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"9","issue":"12","first_page":"676024","last_page":"676024"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10148","display_name":"Advanced MIMO Systems Optimization","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/T10148","display_name":"Advanced MIMO Systems Optimization","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/T10796","display_name":"Cooperative Communication and Network Coding","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11458","display_name":"Advanced Wireless Communication Technologies","score":0.9994999766349792,"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/expectation\u2013maximization-algorithm","display_name":"Expectation\u2013maximization algorithm","score":0.8158327341079712},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8152552843093872},{"id":"https://openalex.org/keywords/maximization","display_name":"Maximization","score":0.712730348110199},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.6938557624816895},{"id":"https://openalex.org/keywords/relay","display_name":"Relay","score":0.6592380404472351},{"id":"https://openalex.org/keywords/maximum-likelihood-sequence-estimation","display_name":"Maximum likelihood sequence estimation","score":0.4925573468208313},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.47802457213401794},{"id":"https://openalex.org/keywords/bayesian-probability","display_name":"Bayesian probability","score":0.42163577675819397},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.41730254888534546},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.413334459066391},{"id":"https://openalex.org/keywords/estimation-theory","display_name":"Estimation theory","score":0.31375789642333984},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.31178343296051025},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.26087555289268494},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.23421946167945862},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.12866812944412231}],"concepts":[{"id":"https://openalex.org/C182081679","wikidata":"https://www.wikidata.org/wiki/Q1275153","display_name":"Expectation\u2013maximization algorithm","level":3,"score":0.8158327341079712},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8152552843093872},{"id":"https://openalex.org/C2776330181","wikidata":"https://www.wikidata.org/wiki/Q18358244","display_name":"Maximization","level":2,"score":0.712730348110199},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.6938557624816895},{"id":"https://openalex.org/C2778156585","wikidata":"https://www.wikidata.org/wiki/Q174053","display_name":"Relay","level":3,"score":0.6592380404472351},{"id":"https://openalex.org/C191462741","wikidata":"https://www.wikidata.org/wiki/Q6795902","display_name":"Maximum likelihood sequence estimation","level":3,"score":0.4925573468208313},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.47802457213401794},{"id":"https://openalex.org/C107673813","wikidata":"https://www.wikidata.org/wiki/Q812534","display_name":"Bayesian probability","level":2,"score":0.42163577675819397},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.41730254888534546},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.413334459066391},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.31375789642333984},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.31178343296051025},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.26087555289268494},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.23421946167945862},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.12866812944412231},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","level":2,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1155/2013/676024","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2013/676024","pdf_url":null,"source":{"id":"https://openalex.org/S64417657","display_name":"International Journal of Distributed Sensor Networks","issn_l":"1550-1329","issn":["1550-1329","1550-1477"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Distributed Sensor Networks","raw_type":"journal-article"},{"id":"pmh:oai:RePEc:sae:intdis:v:9:y:2013:i:12:p:676024","is_oa":false,"landing_page_url":"https://journals.sagepub.com/doi/10.1155/2013/676024","pdf_url":null,"source":{"id":"https://openalex.org/S4306401271","display_name":"RePEc: Research Papers in Economics","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I77793887","host_organization_name":"Federal Reserve Bank of St. Louis","host_organization_lineage":["https://openalex.org/I77793887"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"},{"id":"pmh:oai:doaj.org/article:7c6d33b2de0146ef95152753e62ab034","is_oa":true,"landing_page_url":"https://doaj.org/article/7c6d33b2de0146ef95152753e62ab034","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"International Journal of Distributed Sensor Networks, Vol 9 (2013)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.1155/2013/676024","is_oa":true,"landing_page_url":"https://doi.org/10.1155/2013/676024","pdf_url":null,"source":{"id":"https://openalex.org/S64417657","display_name":"International Journal of Distributed Sensor Networks","issn_l":"1550-1329","issn":["1550-1329","1550-1477"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310319869","host_organization_name":"Hindawi Publishing Corporation","host_organization_lineage":["https://openalex.org/P4310319869"],"host_organization_lineage_names":["Hindawi Publishing Corporation"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"International Journal of Distributed Sensor Networks","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G4171496211","display_name":null,"funder_award_id":"2012AA01A506","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G5474858960","display_name":"\u9762\u5411\u5927\u89c4\u6a21\u76ee\u6807\u8ddf\u8e2a\u7684\u591a\u6ce2\u675f\u536b\u661f\u5929\u7ebf\u81ea\u9002\u5e94\u5904\u7406\u6280\u672f\u7814\u7a76","funder_award_id":"61371073","funder_id":"https://openalex.org/F4320321001","funder_display_name":"National Natural Science Foundation of China"},{"id":"https://openalex.org/G6768386405","display_name":null,"funder_award_id":"61071083","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":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":28,"referenced_works":["https://openalex.org/W1500551892","https://openalex.org/W1507943102","https://openalex.org/W1975629014","https://openalex.org/W1976393921","https://openalex.org/W1976659183","https://openalex.org/W1985690171","https://openalex.org/W1986134699","https://openalex.org/W1991026988","https://openalex.org/W2010381721","https://openalex.org/W2012625931","https://openalex.org/W2038815001","https://openalex.org/W2048939256","https://openalex.org/W2049633694","https://openalex.org/W2076175864","https://openalex.org/W2097572496","https://openalex.org/W2117702206","https://openalex.org/W2135073150","https://openalex.org/W2142699079","https://openalex.org/W2143365251","https://openalex.org/W2150970583","https://openalex.org/W2156643520","https://openalex.org/W2156860055","https://openalex.org/W2158264312","https://openalex.org/W2164166019","https://openalex.org/W2165709293","https://openalex.org/W2170723242","https://openalex.org/W2215092156","https://openalex.org/W3129711340"],"related_works":["https://openalex.org/W1978153144","https://openalex.org/W102848802","https://openalex.org/W2120595071","https://openalex.org/W1512911331","https://openalex.org/W1575258345","https://openalex.org/W2122958477","https://openalex.org/W2172249169","https://openalex.org/W2150616621","https://openalex.org/W2025556230","https://openalex.org/W1964091180"],"abstract_inverted_index":{"The":[0,108],"growing":[1],"popularity":[2],"of":[3,24,48,84,94,128],"machine-to-machine":[4],"(M2M)":[5],"communications":[6],"in":[7,81,91],"wireless":[8],"networks":[9],"is":[10,37,64,73],"driving":[11],"the":[12,16,22,45,57,62,67,70,77,82,92,95,98,105,119,123,126,129],"need":[13],"to":[14,66,75],"update":[15],"corresponding":[17],"receiver":[18,63],"technology":[19],"based":[20],"on":[21],"characteristics":[23],"M2M.":[25],"In":[26],"this":[27],"paper,":[28],"an":[29],"expectation-maximization-based":[30],"maximum":[31,49,78],"likelihood":[32,50,79],"cascaded":[33,99],"channel":[34,51,100,120],"estimation":[35,52],"method":[36],"developed":[38],"for":[39,118],"relay-based":[40],"M2M":[41],"two-way":[42],"communications.":[43],"As":[44],"closed-form":[46],"solution":[47,80],"does":[53],"not":[54],"exist,":[55],"and":[56,122],"superimposed":[58],"signal":[59],"structure":[60],"at":[61],"conducive":[65],"expectation-maximization":[68,71,106],"application,":[69],"algorithm":[72],"utilized":[74],"provide":[76],"presence":[83],"unobserved":[85],"data":[86],"through":[87,104],"stable":[88],"iterations.":[89,107],"Even":[90],"absence":[93],"training":[96],"sequence,":[97],"estimates":[101],"are":[102,113],"obtained":[103],"Bayesian":[109],"Cram\u00e9r-Rao":[110],"lower":[111],"bounds":[112],"derived":[114],"under":[115],"random":[116],"parameters":[117],"estimation,":[121],"simulation":[124],"demonstrates":[125],"validity":[127],"proposed":[130],"studies.":[131]},"counts_by_year":[],"updated_date":"2026-06-06T09:05:17.133730","created_date":"2025-10-10T00:00:00"}