A method for creating and transmitting an encoded data stream comprises receiving a data stream that includes a number M of same-rate data streams x.sub.1, x.sub.2, . . . , x.sub.M, where each data stream in the M same-rate data streams has an ordered number of bits with each bit having a period of T.sub.sym and a clock pulse signal that includes a plurality of pulses where a time duration of each pulse in the plurality of pulses corresponds to T.sub.sym/M. A number M of pulse signals is generated, and an encoded data stream is created by multiplying a value of one bit of each data stream in the ordered number M of data streams by a value of a corresponding of a pulse signal in the ordered number M of orthogonal pulse signals to provide M results, and summing the M results. Once summed, the encoded data stream can be transmitted.