—This work addresses the analysis of electromagnetically coupled microstrip antennas printed on uniaxial substrates from the perspective of computational implementation. It also describes the basic steps involved in the formulation of the method of moments and the numerical procedure for solving integrals in the impedance matrix
{"title":"Análise de Antenas de Microfita Excitadas por Acoplamento Eletromagnético: Implementação Computacional e Aspectos Numéricos","authors":"V. D. Costa, L. Cividanes, J. Lacava","doi":"10.14209/sbrt.2003.158","DOIUrl":"https://doi.org/10.14209/sbrt.2003.158","url":null,"abstract":"—This work addresses the analysis of electromagnetically coupled microstrip antennas printed on uniaxial substrates from the perspective of computational implementation. It also describes the basic steps involved in the formulation of the method of moments and the numerical procedure for solving integrals in the impedance matrix","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"1509 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120876098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A New Method For Objective Assessment of Audio Quality","authors":"J. Barbedo, A. Lopes","doi":"10.14209/sbrt.2003.687","DOIUrl":"https://doi.org/10.14209/sbrt.2003.687","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128478512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Call Admission Control for QoS provisioning in Multimedia All-IP Wireless and Mobile Networks","authors":"K. Dias, S. F. L. Fernades, D. Sadok","doi":"10.14209/sbrt.2003.777","DOIUrl":"https://doi.org/10.14209/sbrt.2003.777","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117123885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Jeszensky, T. Abrão, E. Stancanelli, V. A. D. Silva, A. Kuramoto, B. Angélico
Resumo — Neste trabalho foi proposto um Cancelador de Interferência Sucessivo de Grupo (MC-GSIC) para sistemas CDMA adaptado a canais com desvanecimento multipercurso. Particularmente, foi analisado o desempenho do receptor sujeito a canais COST259DCM através de simulação Monte Carlo (MCS). Abstract — In this paper we have proposed a multi-code Group-Wise Successive Interference Cancellation (MC-GSIC) CDMA topology, adapted for multipath fading channels; particularly, we have analysed the performance under COST259DCM channels via Monte Carlo simulation (MCS).
{"title":"Multi-rate Group-Wise Successive Interference Cancellation Structure in COST 259 DCM Channels","authors":"P. Jeszensky, T. Abrão, E. Stancanelli, V. A. D. Silva, A. Kuramoto, B. Angélico","doi":"10.14209/sbrt.2003.443","DOIUrl":"https://doi.org/10.14209/sbrt.2003.443","url":null,"abstract":"Resumo — Neste trabalho foi proposto um Cancelador de Interferência Sucessivo de Grupo (MC-GSIC) para sistemas CDMA adaptado a canais com desvanecimento multipercurso. Particularmente, foi analisado o desempenho do receptor sujeito a canais COST259DCM através de simulação Monte Carlo (MCS). Abstract — In this paper we have proposed a multi-code Group-Wise Successive Interference Cancellation (MC-GSIC) CDMA topology, adapted for multipath fading channels; particularly, we have analysed the performance under COST259DCM channels via Monte Carlo simulation (MCS).","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114159645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Análise de Filas M | M |n com Servidores Lentos e Usuários Não Informados","authors":"F. Cabral","doi":"10.14209/sbrt.2003.487","DOIUrl":"https://doi.org/10.14209/sbrt.2003.487","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114319076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Avaliação de Desempenho de Redes Ad -Hocem um Cenário Típico da Região Amazônica","authors":"M. Margalho, C. Francês, J. W. A. Costa","doi":"10.14209/sbrt.2003.464","DOIUrl":"https://doi.org/10.14209/sbrt.2003.464","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127840051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this note we introduce a new family of wavelets, named Chebyshev wavelets, which are derived from conventional Chebyshev polynomials. Properties of Chebyshev filter banks are investigated, including orthogonality and perfect reconstruction conditions. Chebyshev wavelets of 2nd kind have compact support, their filters possess good selectivity, but they are not orthogonal. The convergence into 2nd kind Chebyshev wavelets via the cascade algorithm is proved by the use of Markov chains theorems. Computational implementation of these wavelets and some clear-cut applications are presented. These wavelets are offered as a choice in wavelet analysis. Keywords— Wavelets, Filter banks, Chebyshev polynomials, Wavelet design.
{"title":"Chebyshev Wavelets","authors":"R. Cintra, Hélio M. de Oliveira, L. R. Soares","doi":"10.14209/sbrt.2003.811","DOIUrl":"https://doi.org/10.14209/sbrt.2003.811","url":null,"abstract":"In this note we introduce a new family of wavelets, named Chebyshev wavelets, which are derived from conventional Chebyshev polynomials. Properties of Chebyshev filter banks are investigated, including orthogonality and perfect reconstruction conditions. Chebyshev wavelets of 2nd kind have compact support, their filters possess good selectivity, but they are not orthogonal. The convergence into 2nd kind Chebyshev wavelets via the cascade algorithm is proved by the use of Markov chains theorems. Computational implementation of these wavelets and some clear-cut applications are presented. These wavelets are offered as a choice in wavelet analysis. Keywords— Wavelets, Filter banks, Chebyshev polynomials, Wavelet design.","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133923197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
W. Lopes, F. Madeiro, J. Galdino, B. G. Aguiar Neto, Marcelo Sampaio Alencar
In the present paper the modulation diversity (MD) technique is applied to image transmission (based on vector quantization) over a Rayleigh fading channel. The benefits of MD are presented and discussed. The combination of MD with the index assignment technique (robust vector quantization) is evaluated. The work also evaluates the effects of channel estimation errors on the performance of a communication system that uses MD, in terms of bit error rate and quality of the reconstructed images.
{"title":"Diversidade em Modulação Aplicada a Canais de Comunicações Móveis: Efeito dos Erros de Estimação de Canal na Transmissão de Imagens","authors":"W. Lopes, F. Madeiro, J. Galdino, B. G. Aguiar Neto, Marcelo Sampaio Alencar","doi":"10.14209/JCIS.2004.19","DOIUrl":"https://doi.org/10.14209/JCIS.2004.19","url":null,"abstract":"In the present paper the modulation diversity (MD) technique is applied to image transmission (based on vector quantization) over a Rayleigh fading channel. The benefits of MD are presented and discussed. The combination of MD with the index assignment technique (robust vector quantization) is evaluated. The work also evaluates the effects of channel estimation errors on the performance of a communication system that uses MD, in terms of bit error rate and quality of the reconstructed images.","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123823315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Desenvolvimento de Gatewayspara Telefonia IP","authors":"J. G. Silveira, R. Balbinot, F. Castello","doi":"10.14209/sbrt.2003.214","DOIUrl":"https://doi.org/10.14209/sbrt.2003.214","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124676623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Um Controlador Ótimo para o Gerenciamento Ativo de Filas","authors":"M. M. D. A. Lima, N. Fonseca, J. C. Geromel","doi":"10.14209/sbrt.2003.470","DOIUrl":"https://doi.org/10.14209/sbrt.2003.470","url":null,"abstract":"","PeriodicalId":325953,"journal":{"name":"Anais do XX Simpósio Brasileiro de Telecomunicações","volume":"16 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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