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It is better to perform the mapping from an analog low pass filter into a digital low pass filter by either of these mappings and then perform the frequency transformation in the digital domain.

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It is better to perform the mapping from an analog low pass filter into a digital low pass filter by either of these mappings and then perform the frequency transformation in the digital domain.

(a) True

(b) False

I have been asked this question in quiz.

Question is taken from Frequency Transformations in the Digital Domain in portion Digital Filters Design of Digital Signal Processing

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Right answer is (a) True

Best explanation: It is better to perform the mapping from an analog low pass filter into a digital low pass filter by either of these mappings and then perform the frequency transformation in the digital domain because by this kind of frequency transformation, problem of aliasing is avoided.

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