One dimension (real or imaginary) is selected for each of a first plurality of devices that receives one-dimensional modulated complex signals from an access point (AP). The AP uses the selected dimension to generate a modulated complex signal for transmission to each such device, where the signal received by such devices is substantially free of inter-user interference on the dimension selected for the corresponding device. The AP then transmits the complex signal to the devices. As a result, the AP puts the modulated symbols received by of the first plurality of devices are received on either a real part or an imaginary part, but not both, and thus reduces the energy consumption associated with the transmission. Each of the first plurality of wireless devices considers either the real part or the imaginary part of the received signals.