Determine the frequency-response characteristic

Question

Response to the following problem:

M = 4 PAM modulation is used for transmitting at a bit rate of 9600 bits/s on a channel having a frequency response

C(ƒ) = 1/1+j(ƒ/2400)

or | f | ≤ 2400, and C( f ) = 0 otherwise. The additive noise is zero-mean white Gaussian with power spectral density 1 2 N₀ W/Hz. Determine the (magnitude) frequency-response characteristic of the optimum transmitting and receiving filters.