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It does not have to be. Voltage can be DC, sinusoidal, square wave, triangular wave, etc.
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Why cosine wave is used as carrier signal in all modulation techniques. why not sine wave?
The sinusoidal wave is harmonically pure, i.e. it only has one frequency in the frequency domain. If it were not harmonically pure, i.e. if it were not sinusoidal, it would be more difficult, if not impossible, to demodulate it at the receiver.
What is a signal generator for a speedometer?
if the speedometer works off of an input wave (sinusoidal signal) you would think the signal generator would be a source of reference
Why carrier signal is always in analog signal?
It isn't always. Baseband analog signals have no carrier.
Why sinusoidal signal is called basic signal?
The sinusoidal signal is called a basic signal because, by Fourier Analysis, you can not further reduce it. It is one sine wave of one frequency of one amplitude of one phase. It has no harmonics. If you converted it from time domain to frequency domain you would only get one line, at the fundamental frequency.
How is sinusoidal signal produced?
You may use a filter which will round off the square pulse to sine wave.The higher order the filter the better the SINE wave . The Square pulse and the sine wave must both be tuned to our required frequency
What colleges offer Electrical Engineering Courses in Maryland?
In the previous sections of this chapter, we investigated the effect of slowly varying the amplitude of a sinusoidal carrier wave in accordance with the baseband (information carrying) signal. There is another way of modulating a sinusoidal carrier wave, an
Is sinusoidal signal be an energy signal?
they have an infinite energy
Why cosine wave is used as carrier signal in all modulation techniques. why not sine wave?
The sinusoidal wave is harmonically pure, i.e. it only has one frequency in the frequency domain. If it were not harmonically pure, i.e. if it were not sinusoidal, it would be more difficult, if not impossible, to demodulate it at the receiver.
Which type of signal oscillated between maximum and minimum values overtime?
A sinusoidal signal.
When does Carrier Signal occur?
The carrier signal occurs at the beginning to transmit information.
What are the difference between carrier signal modulating signal modulated signal baseband and passband?
carrier signal- use for the purpose of conveying information. modulating signal- causes variations in some characteristics of carrier signal. modulated signal - carrier signal after altration in its characteristics is called modulated signal. example- if you want to see an object (suppose it is an modulating signal),you need light(light is carrier signal) and when light will reflect on object you will be able to see if (that is modulated signal)
Is there a difference between the Crest and the Peak Dilation of Sinusoidal Signal?
They are the same thing.
What is a signal generator for a speedometer?
if the speedometer works off of an input wave (sinusoidal signal) you would think the signal generator would be a source of reference
Why carrier signal is always in analog signal?
It isn't always. Baseband analog signals have no carrier.
Why sinusoidal signal is called basic signal?
The sinusoidal signal is called a basic signal because, by Fourier Analysis, you can not further reduce it. It is one sine wave of one frequency of one amplitude of one phase. It has no harmonics. If you converted it from time domain to frequency domain you would only get one line, at the fundamental frequency.
Why does am modulation produce separate frequencies?
AM modulation produces separate frequencies because you are effectively mixing two signals together, the carrier and the signal. Recall that Fourier Analysis states that, if you mix two sinusoidal waveforms together, you can a frequency distribution of four waves - the original two - their sum - and their difference. In normal AM modulation, the carrier is much higher in frequency than the signal, so the sum and difference are not far from the carrier, but you can still pick them out with a sufficiently precise spectrum analyzer.
Is carrier signal present at output of double side band suppressed carrier?
No, the carrier signal is not present at the output of double side band suppressed carrier. That is what suppressed carrier means. However, the receiver has enough information to regenerate the carrier if need be. The advantage of suppressed carrier mode is that more power can be deployed to the signal-carrying portion of the modulated carrier.
