A partial-response waveform can be designed by using any Nyquist pulse in place of the sinc pulse.
a. What is the equivalent channel for a duobinary partial-response waveform based on the Nyquist pulse
![48_e28a558d-5e2e-4390-a146-86fa269cf6d1.png](https://secure.tutorsglobe.com/CMSImages/48_e28a558d-5e2e-4390-a146-86fa269cf6d1.png)
and the generator polynomial g(x) = x + 1?
b. What is the matched filter for this waveform? Sketch a decision-feedback demodulator. Sketch an alternative implementation that uses a precoder.