{"id":422,"date":"2012-11-17T10:33:11","date_gmt":"2012-11-17T12:33:11","guid":{"rendered":"http:\/\/efagundes.com\/openclass_networking\/?page_id=422"},"modified":"2022-01-16T17:51:05","modified_gmt":"2022-01-16T20:51:05","slug":"tipos-de-modulacao-iii","status":"publish","type":"page","link":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-iii\/","title":{"rendered":"Tipos de modula\u00e7\u00e3o (III)"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2464\" data-permalink=\"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-iii\/slide14-5\/\" data-orig-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.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=\"Slide14\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?fit=960%2C720&amp;ssl=1\" class=\"alignnone size-full wp-image-2464\" src=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=960%2C720\" alt=\"Slide14\" width=\"960\" height=\"720\" srcset=\"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?w=960&amp;ssl=1 960w, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide144.jpg?resize=300%2C225&amp;ssl=1 300w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/a>Os conceitos de largura de banda, baud, s\u00edmbolo e taxa de bits costuma ser confundidos:<\/p>\n<p>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) e \u00e9 medida em Hz.<\/p>\n<p>A taxa de baud \u00e9 o n\u00famero de amostras realizadas. Cada amostra envia um fragmento de informa\u00e7\u00f5es, ou seja, um s\u00edmbolo. A taxa de bauds e a taxa de s\u00edmbolos s\u00e3o portanto id\u00eanticas. A t\u00e9cnica de modula\u00e7\u00e3o determina o n\u00famero de bits\/s\u00edmbolo.<\/p>\n<p>A taxa de bits \u00e9 a quantidade de informa\u00e7\u00f5es enviadas pelo canal e \u00e9 igual ao n\u00famero de s\u00edmbolos multiplicado pelo n\u00famero de bits\/s\u00edmbolo.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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) e \u00e9 medida em Hz. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":394,"menu_order":16,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-422","page","type-page","status-publish","hentry"],"jetpack_shortlink":"https:\/\/wp.me\/P8yKGp-6O","jetpack-related-posts":[{"id":424,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-iv\/","url_meta":{"origin":422,"position":0},"title":"Tipos de modula\u00e7\u00e3o (IV)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"\u00a0 Todos os modems avan\u00e7ados utilizam uma combina\u00e7\u00e3o de t\u00e9cnicas de modula\u00e7\u00e3o para transmitir v\u00e1rios bits por baud. Com freq\u00fc\u00eancia, v\u00e1rias amplitudes e v\u00e1rios deslocamento de fase s\u00e3o combinados para transmitir diversos bits\/s\u00edmbolos. A figura (a) mostra os pontos 45, 135, 225 e 315 graus com amplitude constante (dist\u00e2ncia a\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide15","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide153.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide153.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide153.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide153.jpg?resize=700%2C400 2x"},"classes":[]},{"id":420,"url":"https:\/\/efagundes.com\/networking\/sistema-telefonico\/tipos-de-modulacao-ii\/","url_meta":{"origin":422,"position":1},"title":"Tipos de modula\u00e7\u00e3o (II)","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"Um baud \u00e9 um sinal ou onda el\u00e9trica anal\u00f3gica. Um ciclo de uma onda anal\u00f3gica \u00e9 igual a um baud. Um ciclo completo inicia na voltagem zero, vai at\u00e9 a mais alta voltagem e desce at\u00e9 a voltagem negativa mais baixa e volta para a voltagem zero. Uma linha de\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide13","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide134.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide134.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide134.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide134.jpg?resize=700%2C400 2x"},"classes":[]},{"id":454,"url":"https:\/\/efagundes.com\/networking\/sistema-de-telefonia-movel\/edge\/","url_meta":{"origin":422,"position":2},"title":"EDGE","author":"Eduardo Fagundes","date":"17\/11\/2012","format":false,"excerpt":"O EDGE est\u00e1 relacionado ao aumento da capacidade de transmiss\u00e3o da interface a\u00e9rea no corrente padr\u00e3o GSM. A principal ideia \u00e9 adicionar novas caracter\u00edsticas na rede GSM mantendo compatibilidade com os telefones celulares GSM \/GPRS e com os equipamentos da rede (BSS, BSC, TRAU, MSC, SGSN e GGSN). Todos os\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\/Slide302.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide302.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide302.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide302.jpg?resize=700%2C400 2x"},"classes":[]},{"id":240,"url":"https:\/\/efagundes.com\/networking\/teoria-da-transmissao-e-meios-magneticos\/sinais-limitados-pela-largura-de-banda-i\/","url_meta":{"origin":422,"position":3},"title":"Sinais limitados pela largura de banda (I)","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"Nenhum recurso de transmiss\u00e3o \u00e9 capaz de transmitir sinais sem perder parte da energia no processo. Se todos os coeficientes da s\u00e9rie de Fourier fossem igualmente reduzidos, o sinal resultante seria reduzido em amplitude, mas n\u00e3o seria distorcido. Entretanto, todos os meios de transmiss\u00e3o reduzem os componentes de Fourier ocasionando\u2026","rel":"","context":"Post similar","block_context":{"text":"Post similar","link":""},"img":{"alt_text":"Slide3","src":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide32.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide32.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide32.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/efagundes.com\/networking\/wp-content\/uploads\/sites\/5\/2015\/03\/Slide32.jpg?resize=700%2C400 2x"},"classes":[]},{"id":335,"url":"https:\/\/efagundes.com\/networking\/transmissao-sem-fio\/o-espectro-eletromagnetico-ii\/","url_meta":{"origin":422,"position":4},"title":"O espectro eletromagn\u00e9tico (II)","author":"Eduardo Fagundes","date":"16\/11\/2012","format":false,"excerpt":"\u00a0 A quantidade de informa\u00e7\u00e3o que uma onda eletromagn\u00e9tica pode transportar \u00e9 relacionada \u00e0 sua largura de banda. 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