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What is the difference between periodic and aperiodic signals?

A signal which repeats itself after a specific interval of time is called periodic signal. A signal which does not repeat itself after a specific interval of time is called aperiodic signal.A signals that repeats its pattern over a period is called periodic signal,A signal that does not repeats its pattern over a period is called aperiodic signal or non periodic.Both the Analog and Digital can be periodic or aperiodic. but in data communication periodic analog sigals and aperiodic digital signals are used.


Why cannot aperiodic signal be represented using fourier series?

An aperiodic signal cannot be represented using fourier series because the definition of fourier series is the summation of one or more (possibly infinite) sine wave to represent a periodicsignal. Since an aperiodic signal is not periodic, the fourier series does not apply to it. You can come close, and you can even make the summation mostly indistinguishable from the aperiodic signal, but the math does not work.


How data communication and digital communication differ?

In digital communication we talk about signal while in data communication we talk about data and the could be in the form of packets or frames.


Difference between analog communication and digital communication?

Analog communication considers infinite amplitude levels. But in digital communication only 2 levels of signal is present.


Analog & digital communication?

In Analog communication, the analog message signal modulates some high carrier frequency inside the transmitter to produce modulated signal.this modulated signal is then transmitted with the help of a transmitting antenna to travel through the transmission channel. At the receiver, this modulated signal is received and processed to recover the original message signal. Example: AM , FM radio transmission an TV transmission. In digital communication, the message signal to be transmitted is digital in nature. This means that digital communication involves the transmission information in digital form Example: ASK, FSK, PSK.


What is wide dynamic range in digital communication system?

ratio of the strongest transmittable signal to weakest discernible signal


Why the received signal in analog communication is distorted by the channel noise than that of digital communication?

If an RF signal is AM modulated with a analogue signal any noise will add or subtract to the amplitude of the RF signal and will be present in the audio signal after detection, also will the noise add itself to the audio signal, where as in digital communication a slight variation in the amplitude of the signal is of no concern because you only work with ones and zeros, it's high or it's low


Define line coding in data communication?

process oftransfer of digital data to digital signal is known as line coding


What are analog and digital modes of operation of an instrument?

In Analog communication, the analog message signal modulates some high carrier frequency inside the transmitter to produce modulated signal.this modulated signal is then transmitted with the help of a transmitting antenna to travel through the transmission channel. At the receiver, this modulated signal is received and processed to recover the original message signal. Example: AM , FM radio transmission an TV transmission. In digital communication, the message signal to be transmitted is digital in nature. This means that digital communication involves the transmission information in digital form Example: ASK, FSK, PSK.


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

yes and no


What are the subjects in the electronics and communication?

signal and system,digital logic design , engineering maths,


Why you are using sampling theorem in communication systems?

sampling is a one type of process use for converting into analog signal to digital signal.