Question

What are the effects produced by Dm by setting up an integrator at the front of DM?

(a) Simplifies the DM decoder

(b) Increases correlation of the signal into the DM input

(c) Emphasizes the low frequencies of x(t)

(d) All of the mentioned

I had been asked this question in examination.

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

Answer 1

Right option is (d) All of the mentioned

To explain I would say: One way to reduce these two types of distortion is to use an integrator in front of the DM. This has two effects. First, it emphasizes the low frequencies of x (t) and increases the correlation of the signal into the DM input. Second, it simplifies the DM decoder because the differentiator (inverse system) required at the decoder is canceled by the DM integrator.