Q:
The ideal reconstruction filter is an ideal low pass filter and its impulse response extends for all time.
Answer & Explanation
Answer: A) True
Explanation: The ideal reconstruction filter is an ideal low pass filter and its impulse response extends for all time. Hence the filter is noncausal and physically nonrealizable. Although the interpolation filter with impulse response given can be approximated closely with some delay, the resulting function is still impractical for most applications where D/A conversion are required.
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