SIGNAL THEORY

What is the Fourier Transform used for?

• Time-domain analysis

• Frequency-domain analysis

• Signal amplification

• Signal filtering

What is the unit of frequency?

• Volt

• Ampere

• Hertz

• Ohm

What is the main purpose of signal modulation?

• Signal amplification

• Signal transmission

• Signal filtering

• Signal storage

What does the impulse response of a system describe?

• Response to a high voltage discharge

• System output to a very short input

• System gain

• System phase

What is the definition of signal bandwidth?

• Signal amplitude

• Signal duration

• Range of frequencies

• Signal power

Which theorem ensures perfect recovery if the sampling frequency exceeds twice the maximum signal frequency?

• Convolution Theorem

• Finite Rate of Innovation

• Shannon–Nyquist Sampling Theorem

• Modulation Theorem

A periodic signal is expressed as a sum of sinusoids. This representation is called:

• Fourier Transform

• Laplace Transform

• Fourier Series

• Trigonometric Series

Which transform converts time-domain signals into a continuous frequency-domain representation?

• Z-Transform

• Fourier Transform

• Wavelet Transform

• Hilbert Transform

What property implies a system’s response to a sum of inputs equals the sum of individual responses?

• Linearity

• Time Variance

• Homogeneity

• Stationarity

Which filter allows frequencies below a cutoff while attenuating higher frequencies?

• High-pass filter

• Band-pass filter

• Low-pass filter

• Notch filter