我同學在那邊無依無靠,想問這些是非題的答案是否正確.還有第伍提的答案,
謝謝,如果不正確的話,也請告知為什麼?萬般感謝囉!!
1. The aliasing phenomenon takes place when the sampling frequency
is strictly less than the Nyquist rate.
YES
2. The reconstruction of a continuous signal using its discrete
samples and an ideal low-pass filter will lead to a continuous
signal which has the same values at the sampling instances but
it has different behavior between samples.
YES
3. Increasing the number of coding bits decrease the error magnitude,
but decrease the bandwidth of the sampled signal.
NO
4. Discrete non-integer delay system cannot be implemented using
discrete system, but can easily be implemented using the method of
continuous-time processing of discrete signals.
NO
5. If the ROC of a discrete sequence is a ring, then the sequence is
non-causal.
6. Increasing the sampling rate by an integer factor reduces the bandwidth
of the main lobe in the signal spectrum.
NO
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