Abstract: A phase domain multiplexed communication system generates N carrier frequencies each with a unique phase according to a selected orthogonal vector containing N elements. A subscriber information signal is first divided through a signal divider (215, FIG. 6). Each divided signal is then upconverted through a mixer (220) and phase shifted according to the selected orthogonal vector. The resulting signal is then combined through a summing element (250) and transmitted. At a receiver, the incoming signal is coupled to a signal divider (315, FIG. 7) where the signal is divided into N signal components. Each signal component is downconverted and phase shifted so that the transmitted subscriber information can be extracted at a summing element (350). At the summing element (350) the desired subscriber signal components add in-phase while the signal components corresponding to other subscribers add out-of-phase.