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interviewr asked about sampling theorem and i said the
common def.(i.e ...sam freq must >=s max freq in the signal
for a sampled signal to recover without alising).he asked
that i have a sin signal of freq 1hz and i sampled at two
zero amplitude points can it be recoverable without
aliasing????
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Answer Posted / puneet kapil
We cannot recover the signal although sampled rate is twice the source frequency without aliasing because at zero amplitudes. because it is an ambiguity in sampling theorem that for θ for which sin(θ)= 0, its not applicable this is called critical frequency points in source signal.
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