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毕业设计论文

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中转数字系统对讲机设计,毕业设计论文

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华南理工大学硕士学位论文AbstractRecently, as the need of information communications growing fast and informationtechnologys development, mobile communication technology get the environment forquick development, such as public cellular system, Trunked network and Ad HocMobile Communication Network. They all have made great progress in their own field.But as those new and complex system are the focus of the world today, some relativesimple mobile wireless communication systems are still competent in daily life,because of their low cost and easy usage. This article will describe one kind ofsingle-hop digital interphone system, which provides better profermance than analoginterphone system.The content first focus on the signaling of the Single-Hop Digital Interphone System,and later, introduce SMV codec of the 3a Generation Mobile System into theSingle-Hop Digital lnterphone System.First, give out the principle of the Single-hop Digital lnterphone in detail, discuss thefeasibility of the system and indicates the advantages of the system.Second, the signaling protocol of the Single-hop Digital lnterphone system isinvestigated. Its a digital protocol instead of an analog one, providing data transferwithout complex routing computing.Third, study the SMV codee and introduce the codec into the interphone system bymodifying the judging terms. The excellent performance of SMV codec can work innarrow band environment as well as in those board-band environment, such asinterphone system.Fourth, simulate the signaling protocol of the Single-hop Digital Interphone system byusing NS2 (Network Simulator 2). And comparing the result to the protocol withoutthe transfer functionFifth, migrate the SMV programme onto the DSP platform. Talk about the real-timeSMV decoder on PATHUS DSP2410. At last, summarize the technology andexperience of developing