Patent ID: 8072899

Claim:
A method for selecting ranks and precoding matrix indices for multiple-input multiple-output (MIMO) communication by a wireless transmitter/receiver unit (WTRU), the method comprising: for each rank of a plurality of ranks, determining a value of a metric indicative of a channel condition of the MIMO communication by the WTRU using that rank; selecting at least two ranks from the plurality of ranks based on the values of the metric; transmitting rank information indicative of the at least two selected ranks for the MIMO communication by the WTRU; for each precoding matrix index (PMI) of a plurality of PMIs, determining a PMI value of the metric using each of the at least two selected ranks; selecting one PMI from the plurality of PMIs based on the PMI values of the metric for each of the at least two selected ranks; and transmitting the selected PMIs for each of the at least two selected ranks.