1. A method for use by a remote unit in an Evolution Data Optimized (EVDO) network, the method comprising: sending a plurality of transmissions to a base station, each of the transmissions corresponding to a respective one of a plurality of hypotheses of multiple antenna usage; receiving feedback from the base station in response to the plurality of transmissions, the feedback being uninformed of multiple antenna usage; using the feedback to select at least one of the hypotheses; and transmitting data using a multiple-antenna scheme associated with the selected at least one of the hypotheses.