{"id":"https://openalex.org/W1979241334","doi":"https://doi.org/10.1145/1500879.1500914","title":"Complex spread spectrum in uplink line of mobile link systems CDMA2000 and UMTS","display_name":"Complex spread spectrum in uplink line of mobile link systems CDMA2000 and UMTS","publication_year":2008,"publication_date":"2008-01-01","ids":{"openalex":"https://openalex.org/W1979241334","doi":"https://doi.org/10.1145/1500879.1500914","mag":"1979241334"},"language":"en","primary_location":{"id":"doi:10.1145/1500879.1500914","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1500879.1500914","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 9th International Conference on Computer Systems and Technologies and Workshop for PhD Students in Computing - CompSysTech '08","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/A5109942575","display_name":"Petar Petrov","orcid":null},"institutions":[{"id":"https://openalex.org/I147527907","display_name":"Technical University of Varna","ror":"https://ror.org/03zrwm897","country_code":"BG","type":"education","lineage":["https://openalex.org/I147527907"]}],"countries":["BG"],"is_corresponding":true,"raw_author_name":"Petar Petrov","raw_affiliation_strings":["Technical University Varna"],"affiliations":[{"raw_affiliation_string":"Technical University Varna","institution_ids":["https://openalex.org/I147527907"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5067736045","display_name":"Valentin Mutkov","orcid":null},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Valentin Mutkov","raw_affiliation_strings":["Rousse University Angel Kancev"],"affiliations":[{"raw_affiliation_string":"Rousse University Angel Kancev","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5109942575"],"corresponding_institution_ids":["https://openalex.org/I147527907"],"apc_list":null,"apc_paid":null,"fwci":0.3666,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.65479347,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"IIIA.11","last_page":"IIIA.11"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10575","display_name":"Wireless Communication Networks Research","score":0.9901999831199646,"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"}},"topics":[{"id":"https://openalex.org/T10575","display_name":"Wireless Communication Networks Research","score":0.9901999831199646,"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/T14438","display_name":"Advanced Scientific Research Methods","score":0.9713000059127808,"subfield":{"id":"https://openalex.org/subfields/1106","display_name":"Food Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T13816","display_name":"Advanced Signal Processing Techniques","score":0.9603999853134155,"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/cdma2000","display_name":"CDMA2000","score":0.9059868454933167},{"id":"https://openalex.org/keywords/umts-frequency-bands","display_name":"UMTS frequency bands","score":0.8282384872436523},{"id":"https://openalex.org/keywords/telecommunications-link","display_name":"Telecommunications link","score":0.7115015983581543},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6330150961875916},{"id":"https://openalex.org/keywords/link","display_name":"Link (geometry)","score":0.5797542929649353},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.5361751317977905},{"id":"https://openalex.org/keywords/spread-spectrum","display_name":"Spread spectrum","score":0.45919832587242126},{"id":"https://openalex.org/keywords/mobile-telephony","display_name":"Mobile telephony","score":0.4391299784183502},{"id":"https://openalex.org/keywords/code-division-multiple-access","display_name":"Code division multiple access","score":0.4312770366668701},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.39065879583358765},{"id":"https://openalex.org/keywords/mobile-radio","display_name":"Mobile radio","score":0.24195262789726257}],"concepts":[{"id":"https://openalex.org/C39183613","wikidata":"https://www.wikidata.org/wiki/Q1023122","display_name":"CDMA2000","level":3,"score":0.9059868454933167},{"id":"https://openalex.org/C101618186","wikidata":"https://www.wikidata.org/wiki/Q3633928","display_name":"UMTS frequency bands","level":2,"score":0.8282384872436523},{"id":"https://openalex.org/C138660444","wikidata":"https://www.wikidata.org/wiki/Q5607897","display_name":"Telecommunications link","level":2,"score":0.7115015983581543},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6330150961875916},{"id":"https://openalex.org/C2778753846","wikidata":"https://www.wikidata.org/wiki/Q6554239","display_name":"Link (geometry)","level":2,"score":0.5797542929649353},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.5361751317977905},{"id":"https://openalex.org/C105344744","wikidata":"https://www.wikidata.org/wiki/Q958957","display_name":"Spread spectrum","level":3,"score":0.45919832587242126},{"id":"https://openalex.org/C95491727","wikidata":"https://www.wikidata.org/wiki/Q992968","display_name":"Mobile telephony","level":3,"score":0.4391299784183502},{"id":"https://openalex.org/C47696715","wikidata":"https://www.wikidata.org/wiki/Q233394","display_name":"Code division multiple access","level":2,"score":0.4312770366668701},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.39065879583358765},{"id":"https://openalex.org/C2781307350","wikidata":"https://www.wikidata.org/wiki/Q6887221","display_name":"Mobile radio","level":2,"score":0.24195262789726257}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/1500879.1500914","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1500879.1500914","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 9th International Conference on Computer Systems and Technologies and Workshop for PhD Students in Computing - CompSysTech '08","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":6,"referenced_works":["https://openalex.org/W94314943","https://openalex.org/W566104776","https://openalex.org/W1976521294","https://openalex.org/W2229936513","https://openalex.org/W2248437100","https://openalex.org/W2288666915"],"related_works":["https://openalex.org/W1553196370","https://openalex.org/W1486733671","https://openalex.org/W2049865894","https://openalex.org/W2187108204","https://openalex.org/W3021055710","https://openalex.org/W2165712554","https://openalex.org/W4248909523","https://openalex.org/W2566455368","https://openalex.org/W1564763975","https://openalex.org/W1586448135"],"abstract_inverted_index":{"The":[0,21],"organization":[1],"of":[2,15,23],"the":[3,8],"dedicated":[4],"physical":[5],"channels":[6],"and":[7],"complex":[9],"spread":[10],"spectrum":[11],"in":[12],"uplink":[13],"line":[14],"mobile":[16],"link":[17],"systems":[18],"are":[19],"considered.":[20],"principle":[22],"constructing":[24],"OCQPSK-modulators":[25],"is":[26],"analysed.":[27]},"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}