5 6 Consider the 8-PSK constellation shown in the figure. Where d is the distance between two signal points and the circle's radius is 2. Find the distance d. A QPSK

has the transmitted waveforms S₁ (t) = 4 cos (2nfet +) where i = 0,1, 2, 3 and 0 < t < Ts Draw its signal space diagram.