廣電微波數(shù)字化改造可研中市場(chǎng)需求和技術(shù)方案優(yōu)化研究.pdf

1、r1曲啞H鞫l■—■—————Il⑧中國近代第一所大≮’FOUNDEDIN1895天洋大謦TlANJINUNIVERSITY工程碩士學(xué)位論文領(lǐng)域：作者姓名：指導(dǎo)教師：企業(yè)導(dǎo)師：張水波副教授天津大學(xué)研究生院2006年5月ABSTRACTMicrowavetechnologyhasexitedforoverhalfofthecenturyIttransmitstheinformationbygroundvisualdistanceinmic

2、rowavefrequencybandItisakindofwirelesstransmissiontechnologyFromthe1970sbroadcasttelevisionbureaurenttelecommicrowavemainlinetotransmitcentralbroadcasttelevisionprogramandmanyprovinceshavebuiRtheirOWnbroadcasttelevisionm

3、icrowavenetsTheearlymicrowavetransmissionsystemsareallanalogueWiththedevelopmentandprogressofthetechnologytheshortcomingsofanaloguemicrowaveequipments’smalltransmissioncapacityhavebecomemoreandmoreobviousTodaybroadcastte

4、levisionisbecomingdigitalfromproducingtoplaying，andthedigitalprogramneedsdigitaltransmissionmeans，sowemustcarrydigitalizationreformforanaloguemicrowaveequipmentsBytheearlyof1980sand1990s，satellitetransmissionandSDHsynchr

5、onoustransmissiontechnologyhavebeenusedwidelyinbroadcasttelevisionprogramUansmission，andthebigcapacitydigitalmicrowavetransmissionsystemofN155Mb／shasappearedDigitalmicrowavehasbecomeoneofthethreebigsupports(microwave，fib

6、erandsatellite)ofmoderninformationtransmissionInChinasomeprovinceshavecarrieddigitalizationreformforbroadcasttelevisionmicrowaveBecauseoftheprovinces’differencesinthelocation，populmion，economicstateandtransmissionworkmic

7、rowavedigitalizationreform’StechnologyschemesarealsodifferentAtpresent，inthefeasibilitysdudyofbroadcasttelevisionmicrowavesdigitalizationreform，theoptimizationofmarketdemandandtechnologyschemefeasibilitysdudyhasnotbeenre

8、searchednormativelyByputtingtheoryintopractice，thispapergivestheoptimizationresearchformarketdemandandtechnologyschemeofbroadcasttelevisionmicrowave’Sdigitalizationreform，andsomeprovince’sbroadcasttelevisionmicrowavesdig