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Aliasing - need explanation with regard to sampling signals

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eem2am

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Aliasing

Hello,

Can you explain aliasing? (with regard to sampling signals)

Is it the detection of a sinusoid at a certain frequency which is not actually present in the actual signal being detected?
 

Re: Aliasing

eem2am,
Aliasing is a phenomenon that occurs when the sampling frequency (Fs) is less than 2X the maximum frequency (Fin) of the signal to be sampled. Under these conditions, any signals with a frequency > Fs/2 appear on the output as a signal with a frequency of Fs/2-Fin. For example, If the sampling frequency is 2000Hz, and the input frequency is 1001 Hz, The signal on the output would have a frequency of 1001 - (2000/2) = 1Hz.
Regards,
Kral
 

Aliasing

Hi friend,

see this link and if it is not cleare or not enough then let me know.
 

Aliasing

aliasing is the phenomenon happens when ur sampling rate is less than nyquest rate,in this phenomenon higher frequency compunent of one envalop overlaps with lower frequency compunent of nxt envalop,
 

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