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2601:2:4D00:27B:B12B:CB9B:8C23:415C: cleaning up some of the math notation

2014-12-30T04:47:16Z

cleaning up some of the math notation

← Older revision		Revision as of 06:47, 30 December 2014
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	In [[telecommunication]], '''[[John R. Carson\|Carson]]'s bandwidth rule''' defines the approximate [[Bandwidth (signal processing)\|bandwidth]] requirements of [[communications system]] components for a [[carrier signal]] that is [[frequency modulated]] by a continuous or broad spectrum of frequencies rather than a single frequency. Carson's rule does not apply well when the modulating signal contains discontinuities, such as a square wave. Carson's rule originates from [[John Renshaw Carson]]'s 1922 paper.<ref>J.R. Carson, "Notes on the theory of modulation", [[Proc. IRE]], vol. 10, no. 1 (Feb. 1922), pp. 57-64.</ref>		== Ugg Portugal Corte Ingles Ficamos muito felizes com o hotel ==

	~~Carson's bandwidth rule is expressed by the relation~~ <~~math~~>~~CBR = 2 (\Delta f + f_m)~~<~~/math~~> ~~where CBR is the bandwidth requirement~~, <~~math~~>~~\Delta f~~<~~/math~~> ~~is the peak [[frequency deviation]]~~, ~~and~~ <~~math~~>~~f_m~~<~~/math~~> ~~is the highest frequency in the modulating signal~~.		Por que hesita em dizer as palavras da oração Aliança? Talvez porque ele traduz ser um cristão de um vago compromisso com Cristo a algo muito específico. Dois funcionários foram brutalizados, em maio, um morto em agosto. Enquanto isso, um frasco wellknown rachou o top cinco. <br><br>Arranjos podem mudar. S. Então, pensando que ele não tinha nada para se livrar, ele realmente tentou algumas das novas idéias que ele tinha fazer uma aparição com base em sua pesquisa. Teria sido exlawyers, professores de jornalismo (sim, eles [http://www.algarveclassiccars.com/backoffice/includes/juicy.asp?ad=94-Ugg-Portugal-Corte-Ingles Ugg Portugal Corte Ingles] existem) e outras sumidades semelhantes que possam vir a ter um viés inerente contra a imprensa tablóide. <br><br>Tentar fazer tudo de uma vez. Puxe lentamente o peso para cima e apertar a sua volta no topo do movimento. Se você está tentando manter as salas constante, ou alterá-los um pouco, você deve manter o mobiliário semelhante ao resto. Guia de hoje é Kanika Singh, um graduado história com um conhecimento detalhado do Moghulera Delhi. <br><br>Doação online com jogos on-line oferece uma enorme oportunidade para organizações sem fins lucrativos em busca de novas vias de captação de recursos e engajamento. Todos os seis pacientes totalmente recuperado após tratamento. Isso na verdade significa que eles estão completando 3 'desafios' a cada semana, mas, eles também têm a opção de completar mais de 3 (e são recompensados com pontos extras de casas e méritos para fazê-lo). <br><br>Heck, Big Brother vencedor allstar Mike Boogie ganhou com ter reconhecidamente nenhuma estratégia em tudo. Existem sites que oferecem para procurar [http://www.imoc.pt/install/images/config.asp?l=83-Oculos-Ray-Ban-Baratos Oculos Ray Ban Baratos] os relatórios policiais de um determinado indivíduo. [http://www.imoc.pt/install/images/config.asp?l=43-Ray-Ban-Aviator-Ebay Ray Ban Aviator Ebay] É conhecido como o melhor lugar para trekkers. Uma explicação sobre as características e benefícios dos pisos sala servidor levantadas.. <br><br>À Primeira Vista ofereceu um olhar para as lutas Virgil Adamson enfrentou depois de ter vista para a primeira desde que ele tinha 1. E, tendo me recomenda-se muito muitos aqui e para os meus amigos, eu também estou ciente de ser uma excelente fonte de alimentação (por falar nisso, eu não sei qual o modelo Corsair é ruim de qualquer jeito). <br><br>Ficamos [http://www.tomderosa.pt/instituto/cosmelan.asp?do=186-Loja-Hollister-Lisboa Loja Hollister Lisboa] muito felizes com o hotel, os funcionários são simpáticos e as acomodações são simples, mas bom para o dinheiro. Este vapor é formada num tubo de líquido dentro do dispositivo e é conhecido como eliquid ou eJuice.. A unidade oferece atendimento para as pessoas que estavam anteriormente sendo tratados em hospitais a até 200 quilômetros de distância de suas famílias por causa da falta histórica de camas seguras médias no sudeste de Londres..<ul>

	~~For example~~, ~~an FM signal with 5 [[kHz]] peak deviation~~, ~~and~~ a ~~maximum audio frequency of~~ 3~~ kHz, would require an approximate bandwidth 2~~(~~5+3~~) ~~= 16 kHz~~.		<li>[http://www.energiadiario.com/publicacion/spip.php?article661/ http://www.energiadiario.com/publicacion/spip.php?article661/]</li>

	~~For example~~, ~~standard broadcast FM has a peak deviation of 75 kHz above and below the carrier~~. ~~With~~ [~~[stereo FM]], the highest modulating frequency (which combines L+R and L-R) is 53 kHz~~.		<li>[http://dougsarcade.com/activity/p/57212/ http://dougsarcade.com/activity/p/57212/]</li>
	~~So most of the energy of standard stereo FM falls in an approximate bandwidth of 2(75+53) = 256 kHz~~.
	~~(Geographically close FM broadcast transmitters are almost always assigned nominal center frequencies at least 500 kHz apart)~~.		<li>[http://bbs.haina263.com/home.php?mod=space&uid=98270&do=blog&quickforward=1&id=732129 http://bbs.haina263.com/home.php?mod=space&uid=98270&do=blog&quickforward=1&id=732129]</li>

	~~Carson's bandwidth rule is often applied to [[transmitter~~]~~]s,~~ [~~[antenna (radio)\|antenna~~]]s, ~~optical sources~~, ~~[[receiver~~ (~~radio~~)~~\|receiver~~]]s, ~~[[photodetector]]s~~, ~~and other communications system components~~.		<li>[http://www.acymall.com/news/html/?143112.html http://www.acymall.com/news/html/?143112.html]</li>

	Any modulated signal will have an ''infinite'' number of sidebands and hence an infinite bandwidth but in practice all significant sideband energy (98% or more) is concentrated within the bandwidth defined by Carson's rule. It is a useful approximation, but setting the arbitrary definition of occupied bandwidth at 98% of the power still means that the power outside the band is only about <~~math~~>~~10\log\left(\frac{0~~.~~02}{0~~.~~98}\right)~~</~~math~~> ~~= 17 dB less than the carrier inside, therefore Carson's Rule is of little use in~~ [~~[spectrum planning~~]].		<li>[http://www.cqche.net/forum.php?mod=viewthread&tid=5214&fromuid=3455 http://www.cqche.net/forum.php?mod=viewthread&tid=5214&fromuid=3455]</li>

	==~~References~~==		</ul>
	<~~references~~/>
	*{{FS1037C}}
	*''Leon W. ~~Couch II'', "''Digital and Analog Communication Systems, 6th Edition''", ''Prentice-Hall, Inc~~.~~, 2001''~~. ~~ISBN 0-13-081223-4~~

	~~{{DEFAULTSORT~~:~~Carson Bandwidth Rule}}~~
	~~[[Category~~:~~Telecommunication theory]~~]
	~~[[Category:Rules of thumb]]~~

en>Addbot: Bot: Migrating 2 interwiki links, now provided by Wikidata on d:q221656

2013-03-12T13:44:30Z

Bot: Migrating 2 interwiki links, now provided by Wikidata on d:q221656

← Older revision		Revision as of 15:44, 12 March 2013
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	I'~~m Leanne~~ and ~~I live~~ with ~~my husband~~ and ~~our~~ 3 ~~children in Sunrise~~, in ~~the FL south area~~. ~~My hobbies~~ are ~~Rock stacking~~, ~~Dance~~ and ~~Radio-Controlled Car Racing~~.<br><br>~~Feel free to surf to my web blog:~~ [~~http:~~/~~/hi~~-~~fidelity~~.~~biz/read_blog/3899/how~~-to-~~get~~-~~free-fifa-15-coins FIFA 15 coin hack~~]		In [[telecommunication]], '''[[John R. Carson\|Carson]]'s bandwidth rule''' defines the approximate [[Bandwidth (signal processing)\|bandwidth]] requirements of [[communications system]] components for a [[carrier signal]] that is [[frequency modulated]] by a continuous or broad spectrum of frequencies rather than a single frequency. Carson's rule does not apply well when the modulating signal contains discontinuities, such as a square wave. Carson's rule originates from [[John Renshaw Carson]]'s 1922 paper.<ref>J.R. Carson, "Notes on the theory of modulation", [[Proc. IRE]], vol. 10, no. 1 (Feb. 1922), pp. 57-64.</ref>

			Carson's bandwidth rule is expressed by the relation <math>CBR = 2 (\Delta f + f_m)</math> where CBR is the bandwidth requirement, <math>\Delta f</math> is the peak [[frequency deviation]], and <math>f_m</math> is the highest frequency in the modulating signal.

			For example, an FM signal with 5 [[kHz]] peak deviation, and a maximum audio frequency of 3 kHz, would require an approximate bandwidth 2(5+3) = 16 kHz.

			For example, standard broadcast FM has a peak deviation of 75 kHz above and below the carrier. With [[stereo FM]], the highest modulating frequency (which combines L+R and L-R) is 53 kHz.
			So most of the energy of standard stereo FM falls in an approximate bandwidth of 2(75+53) = 256 kHz.
			(Geographically close FM broadcast transmitters are almost always assigned nominal center frequencies at least 500 kHz apart).

			Carson's bandwidth rule is often applied to [[transmitter]]s, [[antenna (radio)\|antenna]]s, optical sources, [[receiver (radio)\|receiver]]s, [[photodetector]]s, and other communications system components.

			Any modulated signal will have an ''infinite'' number of sidebands and hence an infinite bandwidth but in practice all significant sideband energy (98% or more) is concentrated within the bandwidth defined by Carson's rule. It is a useful approximation, but setting the arbitrary definition of occupied bandwidth at 98% of the power still means that the power outside the band is only about <math>10\log\left(\frac{0.02}{0.98}\right)</math> = 17 dB less than the carrier inside, therefore Carson's Rule is of little use in [[spectrum planning]].

			==References==
			<references/>
			*{{FS1037C}}
			*''Leon W. Couch II'', "''Digital and Analog Communication Systems, 6th Edition''", ''Prentice-Hall, Inc., 2001''. ISBN 0-13-081223-4

			{{DEFAULTSORT:Carson Bandwidth Rule}}
			[[Category:Telecommunication theory]]
			[[Category:Rules of thumb]]

en>Mcld: Undid revision 491559748 by Haoluo (talk) - rv spam

2012-05-09T11:10:23Z

Undid revision 491559748 by Haoluo (talk) - rv spam

New page

I'm Leanne and I live with my husband and our 3 children in Sunrise, in the FL south area. My hobbies are Rock stacking, Dance and Radio-Controlled Car Racing.<br><br>Feel free to surf to my web blog: [http://hi-fidelity.biz/read_blog/3899/how-to-get-free-fifa-15-coins FIFA 15 coin hack]