Có 48+ tài liệu thuộc chủ đề "tín hiệu truyền dẫn"
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In addition, and because it is not always possible to achieve the evolution without the entire replacement of the network and equipment, the chapter describes various methods by which network modernization can be achieved without a major disturbance or interruption to the established service.. 41.1 MATCHING NETWORK CAPACITY TO FORECAST DEMAND. Furthermore, higher costs are incurred in rearranging the network...
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The preceding chapter described the factors in outline equipment design which are crucial to the success of the network evolution plan. executing it is another, and in this respect the ordering and delivery of the equipment should receive considerable attention. 42.1 TENDERING FOR EQUIPMENT. Except for some of the largest corporations, very few companies that operate networks also manufacture the...
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The preceding chapter described the factors in outline equipment design which are crucial to the success of the network evolution plan. executing it is another, and in this respect the ordering and delivery of the equipment should receive considerable attention. 42.1 TENDERING FOR EQUIPMENT. Except for some of the largest corporations, very few companies that operate networks also manufacture the...
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dramatic changes in the regulation of industry. This chapter discusses the motivations behind telecommunications deregulation, and explains some of the new regulatory measures which protect customers’ interests by ensuring that quality services are available at a fair price.. 44.1 REASONS FOR DEREGULATION. As with any change in the legal system, a government wants to convince itself of the benefit of...
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0 private network design and operation. 45.1 TELECOMMUNICATIONS MANAGEMENT. He needs to take ownership of the full cost and functional performance of all information flows, by whatever means, throughout his company. This loses sight of the ‘strategic horizon’, the profound effect that effective all-round commu- nication can have on a company’s operations.. The remainder of the chapter, discusses some of...
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Public Networks and Telecommunications Service Providers. Recently, the trend has been to ‘privatize’ the established. This chapter reviews briefly how some of the basic principles of marketing may be applied to a telecommunications marketplace and in addition outlines some of the PTOs’ options for. 46.1 COMPANY ‘MISSION’. 832 PUBLIC NETWORKS AND TELECOMMUNICATIONS SERVICE PROVIDERS. The mission needs to be sufficiently...
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DIGITAL COMMUNICATION. Classification of signals – Random process. random process y(t+ τ. Random process. Spectral density. Energy spectral density (ESD):. Power spectral density (PSD):. Random process:. Power spectral density of white noise. (d) Fractional power containment bandwidth (e) Bounded power spectral density. Bounded power spectral density: the band leaves a certain stated level
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Transform the information source to a form compatible with a digital system. Transform the digital messages to baseband waveforms. Baseband = signal whose spectrum extends from (or near) DC some finite value (<. Pulse waveforms Bit stream. Formatting and transmission of baseband signal. Sources of Corruption 5. Pulse Code Modulation 6. Pulse Code Modulation. Character Coding. Data = text:...