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What is the process of down sampling called?

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What is the process of down sampling called?

(a) Decimation

(b) Fornication

(c) Both Decimation & Fornication

(d) None of the mentioned

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This question is from Sample and Hold topic in chapter Sampling and Reconstruction of Signals of Digital Signal Processing

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Correct answer is (a) Decimation

For explanation: To avoid aliasing, we first filter out the out-of-band (fl, F J 2) noise by processing the wideband signal. The signal is then passed through the low pass filter and re-sampled (down sampled) at the lower rate. The down sampling process is called decimation.

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