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Which process requires low pass filter?(a) Up-sampling(b) Down-sampling(c) Up-sampling & Down-sampling(d) None of the mentionedI got this question in homework.My question is taken from Sampling and Quantization topic in chapter Formatting and Baseband Modulation of Digital Communications

Answer»

The correct choice is (C) Up-sampling & Down-sampling

The explanation is: Up-sampling REQUIRES low PASS filter after increasing the DATA rate and down-sampling requires low pass filter before decimation.



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