{"id":942,"date":"2012-11-18T18:48:57","date_gmt":"2012-11-18T20:48:57","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=942"},"modified":"2022-01-16T17:51:05","modified_gmt":"2022-01-16T20:51:05","slug":"simbolos-versus-taxa-de-transmissao","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/simbolos-versus-taxa-de-transmissao\/","title":{"rendered":"S\u00edmbolos versus Taxa de Transmiss\u00e3o"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":394,"menu_order":11,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-942","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-fc","jetpack-related-posts":[{"id":422,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-iii\/","url_meta":{"origin":942,"position":0},"title":"Tipos de modula\u00e7\u00e3o (III)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Os conceitos de largura de banda, baud, s\u00edmbolo e taxa de bits costuma ser confundidos: Largura de banda de um meio \u00e9 a faixa de freq\u00fc\u00eancias que passam por ele com atenua\u00e7\u00e3o m\u00ednima. \u00c9 uma propriedade f\u00edsica do meio (normalmente, variando de 0 at\u00e9 alguma freq\u00fc\u00eancia m\u00e1xima definida pelo meio)\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide14","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=700%2C400 2x"},"classes":[]},{"id":255,"url":"https:\/\/efagundes.com\/networking\/teoria-da-transmissao-e-meios-magneticos\/taxa-de-dados-maxima-de-um-canal-ii\/","url_meta":{"origin":942,"position":1},"title":"Taxa de dados m\u00e1xima de um canal (II)","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Todos os canais de transmiss\u00e3o de qualquer interesse pr\u00e1tico tem uma largura de banda de frequ\u00eancia limitada. 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Os n\u00fameros deixam claro que, quando se tenta fazer uma transmiss\u00e3o de 9.600bps usando uma linha telef\u00f4nica com restri\u00e7\u00f5es de largura de banda, modelo sugerido na figura (a) assume a forma mostrada\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide6","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide62.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide62.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide62.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide62.jpg?resize=700%2C400 2x"},"classes":[]},{"id":1086,"url":"https:\/\/efagundes.com\/networking\/lans-sem-fio\/802-11-o-protocolo-da-subcamada-mac-2-2\/","url_meta":{"origin":942,"position":3},"title":"802.11: o protocolo da subcamada MAC (II)","author":"Eduardo Fagundes","date":"19\/11\/2012","format":false,"excerpt":"\u00a0 A taxa de erro de transmiss\u00e3o em Redes sem Fio \u00e9 geralmente muito maior que em redes de fibra \u00f3ptica, por exemplo. Uma maneira de diminuir a probabilidade de erro dos quadros \u00e9 utilizar quadros pequenos. Nesse caso, a taxa de erros na transmiss\u00e3o \u00e9 a mesma, mas somente\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide181","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide181.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide181.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide181.png?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2012\/11\/Slide181.png?resize=700%2C400 2x"},"classes":[]},{"id":251,"url":"https:\/\/efagundes.com\/networking\/teoria-da-transmissao-e-meios-magneticos\/taxa-de-dados-maxima-de-um-canal-i\/","url_meta":{"origin":942,"position":4},"title":"Taxa de dados m\u00e1xima de um canal (I)","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 De acordo com o Teorema de Nyquist, a quantidade de amostras por unidade de tempo de um sinal, chamada taxa ou freq\u00fc\u00eancia de amostragem, deve ser maior que o dobro da maior freq\u00fc\u00eancia contida no sinal a ser amostrado, para que possa ser reproduzido integralmente sem distor\u00e7\u00e3o. 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Com a tecnologia atual, \u00e9 poss\u00edvel codificar alguns bits por Hz em frequ\u00eancias baixas, mas em altas frequ\u00eancias pode-se codificar cerca de 40 bits, assim, um cabo de 500MHz transporta v\u00e1rios gigabits\/s.\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide4","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide43.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide43.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide43.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide43.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/942","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/comments?post=942"}],"version-history":[{"count":0,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/942\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/394"}],"wp:attachment":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/media?parent=942"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}