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Ileen Roychoudhury
2 months ago
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What is “Aliasing” and what are the methods to reduce aliasing?

What is “Aliasing” and what are the methods to reduce aliasing?

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teacher3

Anusree sanyal 1 month ago

Aliasing can be referred to as "the phenomenon in the spectrum of a signal of a high-frequency component, taking on the identity of a low-frequency component in the spectrum of its sampled version." 

The corrective steps taken to minimise Aliasing's effect are-

A low-pass anti-aliasing filter is used in the transmitter portion of the PCM, before the sampler, to remove unnecessary high-frequency components.

The signal sampled after filtering is sampled at a rate slightly greater than that of Nyquist rate.

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