Term · Analog, RF & Mixed-Signal
Aliasing
The folding of signal or noise energy above half the sampling rate down into the baseband, where it is indistinguishable from real signal. It is prevented by band-limiting the input with an anti-alias filter before sampling.
- Also known as
- Fold-back
- Type
- Term
- Domain
- Analog, RF & Mixed-Signal, Data converters
Notes
Deliberate aliasing, called bandpass or undersampling, is sometimes used to downconvert an IF signal without a mixer.
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