# Translations:Dictionary:Alias/2/en

Jump to navigation
Jump to search

(ā’ lē ∂s) **1**. Ambiguity resulting from the sampling process. Where there are fewer than two samples per cycle, an input signal at one frequency yields the same sample values as (and hence appears to be) another frequency (the **sampling theorem**). Half of the frequency of sampling is called the **folding frequency** or **Nyquist frequency**, *f*_{N}. The frequency *f*_{N} + Δ*f* appears to be the smaller frequency, *f*_{N} – Δ*f*. The two frequencies, *f*_{N} + Δ*f* and *f*_{N} – Δ*f*, are *aliases* of each other.

See Figure A-8.