{"id":"https://openalex.org/W2786957373","doi":"https://doi.org/10.1109/vtcfall.2017.8288009","title":"Massive MIMO with Quasi Orthogonal Pilots: A Flexible Solution for TDD Systems","display_name":"Massive MIMO with Quasi Orthogonal Pilots: A Flexible Solution for TDD Systems","publication_year":2017,"publication_date":"2017-09-01","ids":{"openalex":"https://openalex.org/W2786957373","doi":"https://doi.org/10.1109/vtcfall.2017.8288009","mag":"2786957373"},"language":"en","primary_location":{"id":"doi:10.1109/vtcfall.2017.8288009","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtcfall.2017.8288009","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","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/A5025615365","display_name":"Haneya Naeem Qureshi","orcid":"https://orcid.org/0000-0003-4327-0556"},"institutions":[{"id":"https://openalex.org/I8692664","display_name":"University of Oklahoma","ror":"https://ror.org/02aqsxs83","country_code":"US","type":"education","lineage":["https://openalex.org/I8692664"]},{"id":"https://openalex.org/I87208437","display_name":"University of Tulsa","ror":"https://ror.org/04wn28048","country_code":"US","type":"education","lineage":["https://openalex.org/I87208437"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Haneya Naeem Qureshi","raw_affiliation_strings":["School of Electrical and Computer Engineering, University of Oklahoma, Tulsa, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical and Computer Engineering, University of Oklahoma, Tulsa, USA","institution_ids":["https://openalex.org/I87208437","https://openalex.org/I8692664"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054055646","display_name":"Ijaz Haider Naqvi","orcid":"https://orcid.org/0000-0001-8382-9217"},"institutions":[{"id":"https://openalex.org/I207789805","display_name":"Lahore University of Management Sciences","ror":"https://ror.org/05b5x4a35","country_code":"PK","type":"education","lineage":["https://openalex.org/I207789805"]}],"countries":["PK"],"is_corresponding":false,"raw_author_name":"Ijaz Haider Naqvi","raw_affiliation_strings":["Department of Electrical Engineering, Lahore University of Management Sciences (LUMS), Lahore, Pakistan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Lahore University of Management Sciences (LUMS), Lahore, Pakistan","institution_ids":["https://openalex.org/I207789805"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5089530547","display_name":"Momin Uppal","orcid":"https://orcid.org/0000-0003-2122-1315"},"institutions":[{"id":"https://openalex.org/I207789805","display_name":"Lahore University of Management Sciences","ror":"https://ror.org/05b5x4a35","country_code":"PK","type":"education","lineage":["https://openalex.org/I207789805"]}],"countries":["PK"],"is_corresponding":false,"raw_author_name":"Momin Uppal","raw_affiliation_strings":["Department of Electrical Engineering, Lahore University of Management Sciences (LUMS), Lahore, Pakistan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Electrical Engineering, Lahore University of Management Sciences (LUMS), Lahore, Pakistan","institution_ids":["https://openalex.org/I207789805"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.2924,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.62769354,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":1.0,"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":1.0,"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":0.9987000226974487,"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/T10125","display_name":"Advanced Wireless Communication Techniques","score":0.9980000257492065,"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/mimo","display_name":"MIMO","score":0.6195355653762817},{"id":"https://openalex.org/keywords/coherence","display_name":"Coherence (philosophical gambling strategy)","score":0.5633896589279175},{"id":"https://openalex.org/keywords/maximization","display_name":"Maximization","score":0.5383720397949219},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5313720703125},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5309169888496399},{"id":"https://openalex.org/keywords/coherence-time","display_name":"Coherence time","score":0.5019829273223877},{"id":"https://openalex.org/keywords/duplex","display_name":"Duplex (building)","score":0.4702414870262146},{"id":"https://openalex.org/keywords/gaussian","display_name":"Gaussian","score":0.44389280676841736},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.4431033432483673},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.3755865693092346},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3343508243560791},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.1384059190750122},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.09292703866958618}],"concepts":[{"id":"https://openalex.org/C207987634","wikidata":"https://www.wikidata.org/wiki/Q176862","display_name":"MIMO","level":3,"score":0.6195355653762817},{"id":"https://openalex.org/C2781181686","wikidata":"https://www.wikidata.org/wiki/Q4226068","display_name":"Coherence (philosophical gambling strategy)","level":2,"score":0.5633896589279175},{"id":"https://openalex.org/C2776330181","wikidata":"https://www.wikidata.org/wiki/Q18358244","display_name":"Maximization","level":2,"score":0.5383720397949219},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5313720703125},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5309169888496399},{"id":"https://openalex.org/C47091857","wikidata":"https://www.wikidata.org/wiki/Q4118612","display_name":"Coherence time","level":3,"score":0.5019829273223877},{"id":"https://openalex.org/C99611785","wikidata":"https://www.wikidata.org/wiki/Q6453233","display_name":"Duplex (building)","level":3,"score":0.4702414870262146},{"id":"https://openalex.org/C163716315","wikidata":"https://www.wikidata.org/wiki/Q901177","display_name":"Gaussian","level":2,"score":0.44389280676841736},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.4431033432483673},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.3755865693092346},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3343508243560791},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.1384059190750122},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.09292703866958618},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"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/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C552990157","wikidata":"https://www.wikidata.org/wiki/Q7430","display_name":"DNA","level":2,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/vtcfall.2017.8288009","is_oa":false,"landing_page_url":"https://doi.org/10.1109/vtcfall.2017.8288009","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)","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":15,"referenced_works":["https://openalex.org/W1965392255","https://openalex.org/W1971443733","https://openalex.org/W2036223844","https://openalex.org/W2040749258","https://openalex.org/W2054692642","https://openalex.org/W2059957218","https://openalex.org/W2085271812","https://openalex.org/W2098995249","https://openalex.org/W2121315337","https://openalex.org/W2136644341","https://openalex.org/W2145013959","https://openalex.org/W2145740541","https://openalex.org/W2147601077","https://openalex.org/W2319865523","https://openalex.org/W3106249098"],"related_works":["https://openalex.org/W2784320098","https://openalex.org/W4292182623","https://openalex.org/W2613310977","https://openalex.org/W2542853907","https://openalex.org/W2079440735","https://openalex.org/W4388395902","https://openalex.org/W2069751432","https://openalex.org/W2077883150","https://openalex.org/W2490493698","https://openalex.org/W2974914686"],"abstract_inverted_index":{"This":[0],"paper":[1],"presents":[2],"novel":[3],"results":[4],"for":[5,83,113,130,173],"Massive":[6],"MIMO":[7],"time":[8],"division":[9],"duplex":[10],"(TDD)":[11],"system":[12],"where":[13],"the":[14,19,39,46,53,61,71,76,80,93,98,102,121,163,168],"beam-":[15],"forming":[16],"vector":[17],"in":[18,38,134],"down-link":[20],"makes":[21],"use":[22],"of":[23,48,55,70,79,101,110,165,176],"MMSE":[24],"channel":[25,62],"estimates":[26],"with":[27],"quasi-orthogonal":[28,56],"pilot":[29,35,49,57,81,89,148],"sequences":[30,36,58],"as":[31,150],"opposed":[32],"to":[33,60,68,152],"orthogonal":[34,85,88,156],"used":[37],"prior":[40],"art.":[41],"The":[42],"proposed":[43,103,143],"method":[44],"tackles":[45],"issue":[47],"contamination":[50],"by":[51,105],"adapting":[52],"length":[54,78,175],"according":[59],"conditions":[63],"or":[64],"coherence":[65,132,177],"time,":[66],"leading":[67],"maximization":[69],"total":[72],"throughput.":[73],"We":[74,96],"compute":[75],"optimal":[77],"sequences,":[82,90],"both":[84],"and":[86,126,167],"quasi-":[87],"that":[91,141,154],"maximizes":[92],"achievable":[94],"rates.":[95],"formulate":[97],"design":[99],"criteria":[100,122],"scheme":[104,144],"using":[106,123],"a":[107,135],"classical":[108],"theorem":[109],"estimation":[111],"theory":[112],"multi-":[114],"variate":[115],"Gaussian":[116],"distribution.":[117],"Then":[118],"we":[119],"solve":[120],"heuristic":[124],"algorithms":[125],"carry":[127],"out":[128],"simulations":[129],"different":[131],"times":[133],"multi-cell":[136],"system.":[137],"It":[138],"is":[139,171],"shown":[140],"our":[142],"requires":[145],"17\\%":[146],"less":[147],"resources":[149],"compared":[151],"schemes":[153],"employ":[155],"pilots.":[157],"Furthermore,":[158],"an":[159],"interesting":[160],"trade-off":[161],"between":[162],"choice":[164],"pilots":[166],"sum":[169],"rate":[170],"observed":[172],"variable":[174],"interval.":[178]},"counts_by_year":[{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2025-10-10T00:00:00"}