Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42729
Y. M., J. Bermúdez
{"title":"Statistical Analysis of the Bias in Acoustic Feedback Cancellation System for Hearing Aids","authors":"Y. M., J. Bermúdez","doi":"10.14209/sbrt.2008.42729","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42729","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"37 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":"129875879","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42514
A. Selmini, Fábio Violaro
{"title":"Segmentação Automática de Fala para o Português Brasileiro","authors":"A. Selmini, Fábio Violaro","doi":"10.14209/sbrt.2008.42514","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42514","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"2 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":"126120915","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42865
Klenilmar L. Dias, Klissiomara Dias, K. Dias, A. Abelém
— The GLASS (GMPLS Lightwave Agile Switching Simulator) is a tool for simulationof next generation optical networks. It is based on free and open source code developed in JAVA. This paper aims at describing a new feature added to the GLASS, in order to facilitate the dynamic rerouting of LSPs (Label Switched Paths) in GMPLS networks scenarios based on the RSVP-TE signaling protocol.
{"title":"Proposta de Implementação de um Módulo de Re-roteamento Dinâmico de Túneis LSPs para a Ferramenta de Simulação GLASS","authors":"Klenilmar L. Dias, Klissiomara Dias, K. Dias, A. Abelém","doi":"10.14209/sbrt.2008.42865","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42865","url":null,"abstract":"— The GLASS (GMPLS Lightwave Agile Switching Simulator) is a tool for simulationof next generation optical networks. It is based on free and open source code developed in JAVA. This paper aims at describing a new feature added to the GLASS, in order to facilitate the dynamic rerouting of LSPs (Label Switched Paths) in GMPLS networks scenarios based on the RSVP-TE signaling protocol.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI 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":"121892340","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.43137
A. Pereira, R. Santos, F. Lima, F. Cavalcanti, W. Freitas
{"title":"A Resource Assignment Study on Wireless OFDMA Systems","authors":"A. Pereira, R. Santos, F. Lima, F. Cavalcanti, W. Freitas","doi":"10.14209/sbrt.2008.43137","DOIUrl":"https://doi.org/10.14209/sbrt.2008.43137","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"155 12 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":"125886291","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42866
Deolinda Cardoso, F. Backx, R. Sampaio Neto
{"title":"Estimação Cega de Canal para Sistemas MC DS CDMA ZP Baseada nos Métodos das Potências e de Subespaço","authors":"Deolinda Cardoso, F. Backx, R. Sampaio Neto","doi":"10.14209/sbrt.2008.42866","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42866","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"4 2 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":"126118017","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42419
D. Kato, Marcio Eisencraft
Resumo— Nas últimas duas décadas, possibilidades de aplicações práticas de sinais caóticos em telecomunicações têm sido consideradas. Para tanto, é relevante conhecer e controlar as caracterı́sticas de correlação e espectro destes sinais. Neste trabalho, faz-se um estudo analı́tico da seqüência de autocorrelação e da densidade espectral de potência de sinais caóticos de tempo discreto gerados por mapas da famı́lia tenda inclinada. Ele complementa artigos recentes dos autores em que estas caracterı́sticas foram estudadas apenas de forma numérica.
{"title":"Caracterização espectral de sinais caóticos: resultados analíticos","authors":"D. Kato, Marcio Eisencraft","doi":"10.14209/sbrt.2008.42419","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42419","url":null,"abstract":"Resumo— Nas últimas duas décadas, possibilidades de aplicações práticas de sinais caóticos em telecomunicações têm sido consideradas. Para tanto, é relevante conhecer e controlar as caracterı́sticas de correlação e espectro destes sinais. Neste trabalho, faz-se um estudo analı́tico da seqüência de autocorrelação e da densidade espectral de potência de sinais caóticos de tempo discreto gerados por mapas da famı́lia tenda inclinada. Ele complementa artigos recentes dos autores em que estas caracterı́sticas foram estudadas apenas de forma numérica.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"53 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":"129414798","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.43221
Humberto Fernandes, Manoel Aquino
{"title":"Antenas de Microfita com Metamateriais","authors":"Humberto Fernandes, Manoel Aquino","doi":"10.14209/sbrt.2008.43221","DOIUrl":"https://doi.org/10.14209/sbrt.2008.43221","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"165 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":"132045864","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42799
C. Fernandes, G. Favier, J. Mota
{"title":"Single-step least-squares algorithm for direction-finding using a high-order virtual array","authors":"C. Fernandes, G. Favier, J. Mota","doi":"10.14209/sbrt.2008.42799","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42799","url":null,"abstract":"","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"70 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":"127360614","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42697
Fátima Nazaré, Baraúna Magno, João Furtado de Souza
─ ─ ─ This paper proposes a model to calculate the path loss propagation in a mixed environment (forest, streets and buildings) using the parabolic equations method and a random variable, which makes the hybrid model. To solve the parabolic equation the implicit finite differences CrankNicolson scheme was used. The propagation in the paraxial direction in 15° and the complex index of refraction of the medium were considered. In order to validate the proposed model, a campaign of measurements was carried out in two districts of the State of Para, specifically in the city of Marituba in the frequency of 900 MHz and in the city of Barcarena in 1800 MHz. The proposed model was then compared to the experimental data. The error found was 2.28 dB and standard deviation was 3.38 dB. The results show the efficiency of the method.
{"title":"Estudo da Perda de Propagação através de ambientes de florestas usando um modelo híbrido com Equações Parabólicas","authors":"Fátima Nazaré, Baraúna Magno, João Furtado de Souza","doi":"10.14209/sbrt.2008.42697","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42697","url":null,"abstract":"─ ─ ─ This paper proposes a model to calculate the path loss propagation in a mixed environment (forest, streets and buildings) using the parabolic equations method and a random variable, which makes the hybrid model. To solve the parabolic equation the implicit finite differences CrankNicolson scheme was used. The propagation in the paraxial direction in 15° and the complex index of refraction of the medium were considered. In order to validate the proposed model, a campaign of measurements was carried out in two districts of the State of Para, specifically in the city of Marituba in the frequency of 900 MHz and in the city of Barcarena in 1800 MHz. The proposed model was then compared to the experimental data. The error found was 2.28 dB and standard deviation was 3.38 dB. The results show the efficiency of the method.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI Simpósio Brasileiro de Telecomunicações","volume":"98 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":"127519260","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}
Pub Date : 1900-01-01DOI: 10.14209/sbrt.2008.42385
F. Calmon, M. Yacoub
—This paper presents a general diversity combining scheme, in which maximal-ratio combined signals are chosen on a traditional selection combining algorithm. This method has a simple implementation and a tractable analytical formulation. A general analysis of the probability distribution, level crossing rate, and average fade duration at the output of the combiner is provided, exemplifying for a Nakagami-m fading environment. The main result of the present work, however, is the derivation of an exact expression for the SNR at the output of the combiner for a Nakagami-m fading scenario. The formulations derived here find a direct applicability in the dimensioning of cellular networks.
{"title":"A Practical Diversity Combining Scheme based on the Selection of Maximal Ratio Combined Signals","authors":"F. Calmon, M. Yacoub","doi":"10.14209/sbrt.2008.42385","DOIUrl":"https://doi.org/10.14209/sbrt.2008.42385","url":null,"abstract":"—This paper presents a general diversity combining scheme, in which maximal-ratio combined signals are chosen on a traditional selection combining algorithm. This method has a simple implementation and a tractable analytical formulation. A general analysis of the probability distribution, level crossing rate, and average fade duration at the output of the combiner is provided, exemplifying for a Nakagami-m fading environment. The main result of the present work, however, is the derivation of an exact expression for the SNR at the output of the combiner for a Nakagami-m fading scenario. The formulations derived here find a direct applicability in the dimensioning of cellular networks.","PeriodicalId":340055,"journal":{"name":"Anais do XXVI 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":"128886832","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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