¥A.
one-to-one correspondence exists between the representation of a given
signal in the time domain and in the frequency domain.
¥B. The character
of the power spectrum allows us to determine if a signal is aperiodic or
periodic in the time domain. A
periodic signal has a discrete frequency spectrum while an aperiodic signal has
a continuous spectrum.
¥C. The amplitude
spectrum and phase spectrum together allow us to reconstruct the signal in the
time domain. If only the amplitude
spectrum or power spectrum is available, it is possible to make some
conclusions about features of the signal in the time domain.
¥D. The presence of a DC offset means that the
signal has a constant component, and the entire signal is shifted along the
voltage axis in the time domain.
¥I.
If all harmonics divisible by a number n are
missing for a rectangular periodic signal, the rectangular signal in the
time domain has a duty cycle d equal to 1/n .
¥F. The power spectrum allows us to determine the
full bandwidth and the effective bandwidth of the signal.
¥G. Bandwidth refers to the range of frequencies
represented in an analog signal.
The bandwidth of an analog signal determines the maximum sampling rate
for a digital signal that is accurately transmitted via this analog signal.