Exercise 7 Many DSP systems use "oversampling" to lessen the require- ments on the design of an analog reconstruction fi

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Exercise 7 Many Dsp Systems Use Oversampling To Lessen The Require Ments On The Design Of An Analog Reconstruction Fi 1 (396.29 KiB) Viewed 27 times

Exercise 7 Many DSP systems use "oversampling" to lessen the require- ments on the design of an analog reconstruction filter. They use (a finite approximation of) the sinc-interpolation formula to multiply the sampling frequency fs of the initial sampled signal by a factor N before passing it to the digital-to-analog converter. While this requires more CPU operations and a faster D/A converter, the requirements on the subsequently applied analog reconstruction filter are much less stringent. Explain why, and draw schematic representations of the signal spectrum before and after all the relevant signal-processing steps.