{"id":347,"date":"2012-11-16T23:30:54","date_gmt":"2012-11-17T01:30:54","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=347"},"modified":"2022-01-16T17:50:56","modified_gmt":"2022-01-16T20:50:56","slug":"diagrama-de-um-radio-digital","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/diagrama-de-um-radio-digital\/","title":{"rendered":"Diagrama de um r\u00e1dio digital"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2445\" data-permalink=\"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/diagrama-de-um-radio-digital\/slide10-4\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg?fit=960%2C720&amp;ssl=1\" data-orig-size=\"960,720\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Slide10\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2445\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg?resize=960%2C720\" alt=\"Slide10\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide103.jpg?resize=300%2C225&amp;ssl=1 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":329,"menu_order":8,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-347","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-5B","jetpack-related-posts":[{"id":345,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/radio-digital\/","url_meta":{"origin":347,"position":0},"title":"R\u00e1dio Digital","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Usa ondas eletromagn\u00e9ticas (r\u00e1dio ou infravermelho) para transmitir informa\u00e7\u00e3o de um ponto a outro, sem necessitar de alguma uma conex\u00e3o f\u00edsica. Ondas de r\u00e1dio s\u00e3o geralmente referidas como portadoras de r\u00e1dio porque simplesmente fazem a fun\u00e7\u00e3o de entregar energia para um receptor remoto. O dado a ser transmitido \u00e9\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide9","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide93.jpg?resize=700%2C400 2x"},"classes":[]},{"id":434,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/wll-wire-local-loop\/","url_meta":{"origin":347,"position":1},"title":"WLL Wire Local Loop","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"\u00a0 A tecnologia WLL substitui, no todo ou em parte, os pares de cabos telef\u00f4nicos utilizados na conex\u00e3o do telefone do assinante at\u00e9 a central telef\u00f4nica. \u00c9 baseada em um terminal fixo que se comunica, via ondas de r\u00e1dio, com a central de telefonia p\u00fablica e que busca n\u00e3o utilizar\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide20","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide203.jpg?resize=700%2C400 2x"},"classes":[]},{"id":343,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/funcionamento-simples-de-um-radio\/","url_meta":{"origin":347,"position":2},"title":"Funcionamento simples de um r\u00e1dio","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 Existe uma infinidade de esta\u00e7\u00f5es de r\u00e1dio, todas transmitindo seus sinais ao mesmo tempo, mas em frequ\u00eancias diferentes. A primeira parte de um r\u00e1dio (A) \u00e9 selecionar qual a esta\u00e7\u00e3o que queremos ouvir atrav\u00e9s de um processo de sintonia. Em (B) queremos separar apenas uma metade da onda de\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide8","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide83.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide83.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide83.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide83.jpg?resize=700%2C400 2x"},"classes":[]},{"id":680,"url":"https:\/\/efagundes.com\/networking\/comutacao-na-camada-de-enlace-de-dados\/lans-virtuais\/","url_meta":{"origin":347,"position":3},"title":"LANs virtuais","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Para oferecer mais flexibilidade as mudan\u00e7as f\u00edsicas de m\u00e1quinas nas empresas, os fornecedores de redes come\u00e7aram a buscar um meio de recompor a fia\u00e7\u00e3o dos edif\u00edcios inteiramente por software. O conceito resultante \u00e9 chamado VLAN (Virtual LAN) e foi at\u00e9 mesmo padronizado pelo comit\u00ea 802. As VLANs se baseiam em\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide511.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide511.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide511.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide511.jpg?resize=700%2C400 2x"},"classes":[]},{"id":414,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/modulacao-digital\/","url_meta":{"origin":347,"position":4},"title":"Modula\u00e7\u00e3o digital","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"O sinal (bit) pode ser enviado basicamente de duas formas: digital e anal\u00f3gica. Para cada caso existem t\u00e9cnicas particulares a serem empregadas. A modula\u00e7\u00e3o constitui-se na t\u00e9cnica empregada para modificar um sinal com a finalidade de transportar uma informa\u00e7\u00e3o atrav\u00e9s do canal de comunica\u00e7\u00e3o e recuperar o sinal, na sua\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide11","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide117.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide117.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide117.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide117.jpg?resize=700%2C400 2x"},"classes":[]},{"id":450,"url":"https:\/\/efagundes.com\/networking\/sistema-de-telefonia-movel\/gprs\/","url_meta":{"origin":347,"position":5},"title":"GPRS","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"No GSM, cada canal de RF ocupa uma banda de 200 kHz e transmite um sinal digital com taxa de 270,833 kbit\/s com uma estrutura de quadro (frame) com 8 intervalos de tempo (time slots). Nenhum canal ou slots f\u00edsico est\u00e1 designado a priori para uma tarefa em particular. O\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide282.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide282.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide282.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide282.jpg?resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/347","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=347"}],"version-history":[{"count":0,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/347\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/pages\/329"}],"wp:attachment":[{"href":"https:\/\/efagundes.com\/networking\/wp-json\/wp\/v2\/media?parent=347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}