Why is pulse shaping done in a digital communication system? State and explain N

Question

Explanation / Answer

It can be of triangular or square type State and explain Nyquist’s sampling theorem. The Nyquist sampling theorem provides a prescription for the nominal sampling in- terval required to avoid aliasing. It may be stated simply as follows: The sampling frequency should be at least twice the highest frequency contained in the signal. Or in mathematical terms: fs >2 fc where fs is the sampling frequency (how often samples are taken per unit of time or space), and fc is the highest frequency contained in the signal NRZ : Advantages: Simplicity in implementation. Doesn’t require a lot of bandwidth for transmission. Disadvantages: Presence of DC level (indicated by spectral line at 0 Hz). Contains low frequency components. Causes “Signal Droop” (explained later). Does not have any error correction capability. Does not posses any clocking component for ease of synchronisation. Is not Transparent. Long string of zeros causes loss of synchronisation. RZ: Advantages: No DC component. Occupies less bandwidth than unipolar and polar RZ schemes. Does not suffer from signal droop (suitable for transmission over AC coupled lines). Possesses single error detection capability. Clock can be extracted by rectifying (a copy of) the received signal. Disadvantages: Is not Transparent

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.