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The frequency transformation in the digital domain involves replacing the variable z^-1 by a rational function g(z^-1).

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The frequency transformation in the digital domain involves replacing the variable z^-1 by a rational function g(z^-1).

(a) True

(b) False

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Enquiry is from Frequency Transformations in the Digital Domain topic in division Digital Filters Design of Digital Signal Processing

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Right answer is (a) True

Best explanation: As in the analog domain, frequency transformations can be performed on a digital low pass filter to convert it to either a band pass, band stop or high pass filter. The transformation involves the replacing of the variable z^-1 by a rational function g(z^-1).

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