D)It is the origin of CDma For a given channel with additive white gaussian noise, the maximal value of the capacity can be implemented when the signal form is also additive white gaussian in nature - noise-like signal This lead to the noise communication and then the pseudo-noise coding communication, or code multiple access -- CDMA CDMA: each user is assigned a different. and also mutual orthogonal, code as its address.D) It is the origin of CDMA For a given channel with additive white Gaussian noise, the maximal value of the capacity can be implemented when the signal form is also additive white Gaussian in nature -- noise-like signal. This lead to the noise communication and then the pseudo-noise coding communication, or code multiple access -- CDMA. CDMA: each user is assigned a different, and also mutual orthogonal, code as its address