Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > Which of these operations doesn’t affec...
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Which of these operations doesn’t affect the amplitude of the signal:
- a)Time reversal
- b)Amplitude scaling
- c)Signal addition
- d)Signal multiplication
Correct answer is option 'A'. Can you explain this answer?
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Which of these operations doesn’t affect the amplitude of the si...
Time Reversal:
Time reversal operation involves flipping the signal around the vertical axis, essentially reversing the order of samples in the signal. This operation does not affect the amplitude of the signal. The amplitude values remain the same, only the sequence of samples is reversed.
Amplitude Scaling:
Amplitude scaling involves multiplying all the samples in the signal by a constant factor. This operation directly affects the amplitude of the signal. If the scaling factor is greater than 1, the amplitude of the signal will increase. If the scaling factor is less than 1, the amplitude will decrease.
Signal Addition:
Signal addition involves adding two signals together sample by sample. This operation affects the amplitude of the resulting signal. The amplitudes of the samples in the resulting signal are the sum of the corresponding samples in the original signals.
Signal Multiplication:
Signal multiplication involves multiplying two signals together sample by sample. This operation also affects the amplitude of the resulting signal. The amplitudes of the samples in the resulting signal are the product of the corresponding samples in the original signals.
Therefore, out of the given options, time reversal is the operation that doesn't affect the amplitude of the signal. Time reversal only changes the sequence of samples in the signal without altering their amplitudes.
Time reversal operation involves flipping the signal around the vertical axis, essentially reversing the order of samples in the signal. This operation does not affect the amplitude of the signal. The amplitude values remain the same, only the sequence of samples is reversed.
Amplitude Scaling:
Amplitude scaling involves multiplying all the samples in the signal by a constant factor. This operation directly affects the amplitude of the signal. If the scaling factor is greater than 1, the amplitude of the signal will increase. If the scaling factor is less than 1, the amplitude will decrease.
Signal Addition:
Signal addition involves adding two signals together sample by sample. This operation affects the amplitude of the resulting signal. The amplitudes of the samples in the resulting signal are the sum of the corresponding samples in the original signals.
Signal Multiplication:
Signal multiplication involves multiplying two signals together sample by sample. This operation also affects the amplitude of the resulting signal. The amplitudes of the samples in the resulting signal are the product of the corresponding samples in the original signals.
Therefore, out of the given options, time reversal is the operation that doesn't affect the amplitude of the signal. Time reversal only changes the sequence of samples in the signal without altering their amplitudes.
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Which of these operations doesn’t affect the amplitude of the si...
In time reversal only the time variable is affected and not the amplitude.
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Which of these operations doesn’t affect the amplitude of the signal:a)Time reversalb)Amplitude scalingc)Signal additiond)Signal multiplicationCorrect answer is option 'A'. Can you explain this answer?
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