(Orthogonal signal sets) An orthogonal signal set is a set
(a) Compute the spectral efficiency of in bits per two dimensions. Compute the average energy Eb per information bit.
(b) Compute the minimum squared distance d2 min between these signal points. Show that every signal has M -1 nearest neighbors.
(c) Let the noise variance be N0/2 per dimension. Describe a ML detector on this set of M signals.