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Q: Why sampling theorem is used in digital communication?
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Statement of sampling theorem?

sampling theorem is used to know about sample signal.


What does the central limit theorem say about the shape of the sampling distribution of?

The Central Limit THeorem say that the sampling distribution of .. is ... It would help if you read your question before posting it.


What is the use of de Morgan's theorem?

De Morgan's theorem is used to help simplify Boolean Expressions. Digital Circuits can be simplified by the application of this theorem.


Why must sound and video input to a PC be converted from analog to digital?

Because in order to preserve the original sound, a digital sampling rate must be twice the frequency of the analog signalAnalog data is smooth and continuous, where as digital data, such as the binary data used in computers, has distinct gradations. The process of producing digital data by measuring data at a series of representative points is called sampling.


What is meant by sampling in computer graphics?

Sampling is the key technique used to digitize analog information. For example, music CDs are produced by sampling live sound at frequent intervals and then digitizing each sample. The term sampling is also used to describe a similar process in digital photography.


Why fourier transform is used in digital communication why not laplace or z transform?

.....


What are the Advantages of analog and digital communications?

Disadvantage of Analog Communication: 1)Analog Communication systems are costlier than digital communication system. 2)Less Security in Analog Communication 3)More prone to noise interference. Advantage of Analog Communication: 1)Transmission bandwidth required is less. 2)No need of synchronization. Advantage of Digital Communication: 1)Digital Communication systems are simpler and cheaper. 2)Using data encryption only permitted user are allowed to detect the transmitted data. 3)Since in Digital Communication, channel coding is used, therefore a large amount of errors may be detected 4)Since transmitted signal is digital in nature,large amount of noise tolerance may be tolerated Disadvantage of Digital Communication: 1)More transmission bandwidth required. 2)Digital Communication needs synchronization in case of synchronous modulation.


An open standard that uses digital communication of data, and is accepted and used worldwide?

GSM


Why mostly periodic analog and non-periodic digital signal used in communication?

yes and no


Can a corollary be used to prove a theorem?

Yes, the corollary to one theorem can be used to prove another theorem.


What type of sampling is used to estimate the percentage of defects?

random sampling


How is the channel used in the digital communucation system?

The channel used in a digital communication system is used to convey an information signal. A channel has certain capacity for putting in information that is measured by bandwidth in Hz or data rate.