Sometimes aliasing is acclimated carefully on signals with no low-frequency content, alleged bandpass signals. Undersampling, which creates low-frequency aliases, can aftermath the aforementioned result, with beneath effort, as frequency-shifting the arresting to lower frequencies afore sampling at the lower rate. Some agenda channelizers3 accomplishment aliasing in this way for computational efficiency. See Sampling (signal processing) and Nyquist amount (relative to sampling).
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