# Aliasing

In analog-to-digital conversion, the misrepresentation of a continuous signal in a discrete waveform is called **aliasing**, and it occurs when the continuous signal contains frequency components that are higher than half the sampling rate (i.e. higher than the Nyquist frequency).

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To avoid aliasing, the sampling rate must be increased to capture all the frequency components in the analog signal, or the frequencies above half the sampling rate must be filtered out.