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citekey: "ME2046_Sampled_Data_Analysis_Reading_Chapter_2pdf2254ME"
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[!attention] Highlight The result is illustrated in Figure 2.8. Note that the reconstructed signal is lagging behind the original signal. The reason is that the sampled signal did not contain values before t = 0 and only has finite terms. The interpolation formula is based on infinite series with both past and future samples available.
[!attention] Highlight ( ) mod( ) 1 N S N
[!note] Note NOTE! This uses the NYQUIST frequency. NOT the sampling frequency.
[!attention] Highlight One serious problem with the ideal low-pass filter given by Eq. (2.10) is that the filter is non-causal, since h(t) is nonzero for t < 0. h(t) starts at t while the impulse that triggers the response does not occur until t 0