{"id":"https://openalex.org/W2058081683","doi":"https://doi.org/10.1109/jsac.1987.1146564","title":"Orthogonal Cochannel Operation for High Spectrum Efficiency Based on the Example of 16 QAM-140 Mbit/s Systems Using Rolloff 0.19","display_name":"Orthogonal Cochannel Operation for High Spectrum Efficiency Based on the Example of 16 QAM-140 Mbit/s Systems Using Rolloff 0.19","publication_year":1987,"publication_date":"1987-04-01","ids":{"openalex":"https://openalex.org/W2058081683","doi":"https://doi.org/10.1109/jsac.1987.1146564","mag":"2058081683"},"language":"en","primary_location":{"id":"doi:10.1109/jsac.1987.1146564","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jsac.1987.1146564","pdf_url":null,"source":{"id":"https://openalex.org/S90422530","display_name":"IEEE Journal on Selected Areas in Communications","issn_l":"0733-8716","issn":["0733-8716","1558-0008"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Journal on Selected Areas in Communications","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/A5108248669","display_name":"Klaus Vogel","orcid":null},"institutions":[{"id":"https://openalex.org/I1325886976","display_name":"Siemens (Germany)","ror":"https://ror.org/059mq0909","country_code":"DE","type":"company","lineage":["https://openalex.org/I1325886976"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"K. Vogel","raw_affiliation_strings":["Transmission Systems Division, Radio Relay Design, Siemens AG, Munich, Germany","[Radio Relay Design, Siemens AG, Munich, Germany]"],"affiliations":[{"raw_affiliation_string":"Transmission Systems Division, Radio Relay Design, Siemens AG, Munich, Germany","institution_ids":["https://openalex.org/I1325886976"]},{"raw_affiliation_string":"[Radio Relay Design, Siemens AG, Munich, Germany]","institution_ids":["https://openalex.org/I1325886976"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5108248669"],"corresponding_institution_ids":["https://openalex.org/I1325886976"],"apc_list":null,"apc_paid":null,"fwci":0.5233,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":{"value":0.6734373,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"5","issue":"3","first_page":"321","last_page":"328"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12791","display_name":"Full-Duplex Wireless Communications","score":0.9983999729156494,"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/T12791","display_name":"Full-Duplex Wireless Communications","score":0.9983999729156494,"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/T10069","display_name":"Antenna Design and Analysis","score":0.9977999925613403,"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/T10148","display_name":"Advanced MIMO Systems Optimization","score":0.9976000189781189,"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/computer-science","display_name":"Computer science","score":0.7597672939300537},{"id":"https://openalex.org/keywords/transmission","display_name":"Transmission (telecommunications)","score":0.5922472476959229},{"id":"https://openalex.org/keywords/qam","display_name":"QAM","score":0.5722769498825073},{"id":"https://openalex.org/keywords/spectral-efficiency","display_name":"Spectral efficiency","score":0.5485353469848633},{"id":"https://openalex.org/keywords/interference","display_name":"Interference (communication)","score":0.5262938141822815},{"id":"https://openalex.org/keywords/quadrature-amplitude-modulation","display_name":"Quadrature amplitude modulation","score":0.5190118551254272},{"id":"https://openalex.org/keywords/electronic-engineering","display_name":"Electronic engineering","score":0.5006611347198486},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.46949294209480286},{"id":"https://openalex.org/keywords/channel","display_name":"Channel (broadcasting)","score":0.43074098229408264},{"id":"https://openalex.org/keywords/bit-error-rate","display_name":"Bit error rate","score":0.14343208074569702},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.12832313776016235}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7597672939300537},{"id":"https://openalex.org/C761482","wikidata":"https://www.wikidata.org/wiki/Q118093","display_name":"Transmission (telecommunications)","level":2,"score":0.5922472476959229},{"id":"https://openalex.org/C59030546","wikidata":"https://www.wikidata.org/wiki/Q7265371","display_name":"QAM","level":5,"score":0.5722769498825073},{"id":"https://openalex.org/C137246740","wikidata":"https://www.wikidata.org/wiki/Q583970","display_name":"Spectral efficiency","level":3,"score":0.5485353469848633},{"id":"https://openalex.org/C32022120","wikidata":"https://www.wikidata.org/wiki/Q797225","display_name":"Interference (communication)","level":3,"score":0.5262938141822815},{"id":"https://openalex.org/C32409245","wikidata":"https://www.wikidata.org/wiki/Q749753","display_name":"Quadrature amplitude modulation","level":4,"score":0.5190118551254272},{"id":"https://openalex.org/C24326235","wikidata":"https://www.wikidata.org/wiki/Q126095","display_name":"Electronic engineering","level":1,"score":0.5006611347198486},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.46949294209480286},{"id":"https://openalex.org/C127162648","wikidata":"https://www.wikidata.org/wiki/Q16858953","display_name":"Channel (broadcasting)","level":2,"score":0.43074098229408264},{"id":"https://openalex.org/C56296756","wikidata":"https://www.wikidata.org/wiki/Q840922","display_name":"Bit error rate","level":3,"score":0.14343208074569702},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.12832313776016235}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/jsac.1987.1146564","is_oa":false,"landing_page_url":"https://doi.org/10.1109/jsac.1987.1146564","pdf_url":null,"source":{"id":"https://openalex.org/S90422530","display_name":"IEEE Journal on Selected Areas in Communications","issn_l":"0733-8716","issn":["0733-8716","1558-0008"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319808","host_organization_name":"Institute of Electrical and Electronics Engineers","host_organization_lineage":["https://openalex.org/P4310319808"],"host_organization_lineage_names":["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 Journal on Selected Areas in Communications","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/7","display_name":"Affordable and clean energy","score":0.5899999737739563}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":2,"referenced_works":["https://openalex.org/W2141156075","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W4390873927","https://openalex.org/W2147334234","https://openalex.org/W2159438609","https://openalex.org/W2900995485","https://openalex.org/W3196902411","https://openalex.org/W2064534496","https://openalex.org/W2139936226","https://openalex.org/W1970526599","https://openalex.org/W3026565890","https://openalex.org/W2161389097"],"abstract_inverted_index":{"In":[0],"view":[1],"of":[2,10,17,24,80,90,110,163,184],"the":[3,14,21,78,88,107,112,161,182,185],"rapidly":[4],"increasing":[5],"demands":[6],"for":[7,32,42,68,160,198],"transmission":[8,62,129,162],"capacity":[9,89],"public":[11],"networks":[12],"and":[13,51,65,73,115,173,187],"limited":[15],"number":[16],"radio":[18,46,95,116],"frequencies":[19],"available,":[20],"band":[22],"efficiency":[23],"existing":[25,91,113,146],"systems":[26,147],"in":[27,56,59,167],"general":[28],"will":[29],"become":[30],"insufficient":[31],"future":[33],"high-capacity":[34],"requirements.":[35],"This":[36],"fact":[37],"is":[38,194],"becoming":[39],"increasingly":[40],"evident":[41],"16":[43,92,199],"QAM-140":[44,93],"Mbit/s":[45,94,201],"systerns":[47],"at":[48],"3.9,":[49],"6.7,":[50],"11.2":[52],"GHz":[53],"which":[54],"are":[55,75,142],"widespread":[57],"use":[58],"todays":[60],"long-haul":[61],"networks.":[63],"Conceptual":[64],"technological":[66],"measures":[67],"making":[69],"cochannel":[70,128,202],"operation":[71],"feasible":[72],"practical":[74],"presented":[76],"using":[77,174],"example":[79],"a":[81,190],"system":[82],"family.":[83],"By":[84],"these":[85],"means,":[86],"even":[87],"routes":[96],"with":[97,106,118,131],"40":[98],"MHz":[99],"interleaved":[100],"channel":[101,134],"arrangements":[102,157],"can":[103],"be":[104],"doubled":[105],"particular":[108],"advantage":[109],"reutilizing":[111],"antennas":[114],"equipment":[117],"only":[119,175],"minor":[120],"modifications.":[121],"A":[122,178],"progressive":[123],"filter":[124],"concept":[125,186],"makes":[126],"orthogonal":[127],"possible":[130],"negligible":[132],"adjacent":[133],"spectrum":[135],"interference.":[136],"Surface":[137],"acoustic":[138],"wave":[139],"IF":[140],"filters":[141],"used":[143],"to":[144,151],"convert":[145],"from":[148],"0.5":[149],"rolloff":[150],"0.19":[152],"rolloff.":[153],"Special":[154],"RF":[155,165],"channel/antenna":[156],"were":[158],"developed":[159],"all":[164],"channels":[166],"both":[168],"directions,":[169],"including":[170],"space":[171],"diversity":[172],"two":[176],"antennas.":[177],"field":[179],"experiment":[180],"verified":[181],"feasibility":[183],"indicated":[188],"that":[189],"crosspolar":[191],"interference":[192],"canceller":[193],"generally":[195],"not":[196],"necessary":[197],"QAM140":[200],"operation.":[203]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}