Patent ID: 6956907

Claim:
A method for communication in a multiple-input multiple-output (MIMO) wireless system, comprising: receiving a plurality of signals at a receiver via a plurality of receive antennas, wherein each of the received signals at each of the plurality of receive antennas comprises a combination of one or more signals transmitted from a transmitter, processing the plurality of received signals to derive channel state information (CSI) indicative of characteristics of a plurality of transmission channels between the receiver and the transmitter; transmitting the CSI to the transmitter, wherein the transmitter calculates frequency bin energies for a plurality of frequency bins on a plurality of transmit antennas at the transmitter according to a limited power available at each transmit antenna and in accordance with water-pouring equations based in part on the CSI and using an iterative method, and further wherein the transmitter conditions modulation symbols in accordance with the calculated frequency bin energies.