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Question
Data communications deals with the transmission of signals in a reliable and efficient manner.Answer
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Delay distortion occurs because the velocity of propagation of a signal through a guided medium varies with frequency.
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An analog signal can be transmitted only a limited distance before attenuation, noise, and other impairments endanger the integrityof the data.
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A familiar example of analog data is audio, which, in the form of acoustic sound waves, can be perceived directly by human beings.
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A ________ error can occur in the presence of white noise when a slight random deterioration of the signal to noise ratio is sufficient to confuse the receiver's decision of a single bit.
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________ is one of the most fundamental requirements in the transmission of a stream of bits from one device to another.
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The ratio of data bits to total bits is called the code rate .
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In an __________ , there is a cluster of bits in which a number of errors occur, although not necessarily all of the bits in the cluster suffer an error.
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Multiple signals, each at a different position on the spectrum, sharing the same transmission medium, is known as frequency division ________.
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In ________ the phase of the carrier signal is shifted to represent data.
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Because of their simplicity and relatively low frequency response characteristics, ________ codes are commonly used for digital magnetic recording.
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B) AMI
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