Latest ELECTRONICS Aptitude Question SOLUTION: When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency?

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(#M40019059) ELECTRONICS Programming question ELECTRONICS QUESTIONS Keep an EYE

When transmitting digital signals is
it necessary to transmit some harmonics in addition to
fundamental frequency?

Asked In ELECTRONICS (10 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

raghu  (10 years ago)

yes.
see the Fourier series expansion of a square wave:
4/(n*pi)*sin(n*2*pi*f*t) where n=0123....
f:fundamental frequency=1/time period.
so for good reconstruction of the square wave at the receiver side we need to send more frequencies rather than only fundamental frequency. because only one sine wave cannot make the square wave.

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utkarsh  (9 years ago)

Yes, A one frequency signal may not be sufficient, since the
analog and digital signals may look different and the
receiver may not recognize it correctly. To improve the
shape of the signal for better communication, particularly
for high data rates, we need to add some harmonics

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sai kumar  (9 years ago)

yes it is necessary to get a pure sine waveform

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