PHYSICAL LAYER AND TRANSMISSION MEDIA
DIGITAL TRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are the problems with the unipolar scheme?
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DC component
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lack of voltage
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Lack of synchronization
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PC component
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Explanation:
Detailed explanation-1: -The signal level does not return to zero for the entire bit interval during the transmission of a signal. In unipolar NRZ encoding, the signal level remains constant throughout the bit-interval. The encoded signal has an undesirable DC component and lack of self synchronizing capabilities.
Detailed explanation-2: -AdvantagesThe advantages of Unipolar RZ are-It is simple. The spectral line present at the symbol rate can be used as a clock. DisadvantagesThe disadvantages of Unipolar RZ are-No error correction. Occupies twice the bandwidth as unipolar NRZ.
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