Historically the appellation aliasing acquired from radio engineering because of the activity of superheterodyne receivers. When the receiver accouterment assorted signals down to lower frequencies, from RF to IF by heterodyning, an exceptionable signal, from an RF abundance appropriately far from the bounded oscillator (LO) abundance as the adapted signal, but on the amiss ancillary of the LO, can end up at the aforementioned IF abundance as the capital one. If it is able abundant it can baffle with accession of the adapted signal. This exceptionable arresting is accepted as an angel or alias of the adapted signal.
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