2D-PAM5 code The questions below refer to a communications channel constructed with two twisted pairs of wires, employing a 2D-PAM5 (also called PAM5 × 5) encoder-decoder pair at each end operating in fullduplex mode (simultaneous communication in both directions).
a. How many information bits are conveyed by each encoder (channel) symbol?
b. If the information bits are fed to the encoder at the rate of 200 Mbps, with what symbol rate must the encoder operate? In other words, after how many information bits must one 2D symbol be transmitted?
c. Suppose that the following sequence of symbols must be transmitted: (-2, +2), (0, 0), (+2, -2), (0, 0), (-2, +2), (0, 0), . . . . Draw the corresponding waveform in each pair of wires (use the clock period, T, as your time unit).