Patent ID: 7751368

Claim:
A method comprising: measuring, at a receiver station, channel qualities associated with receiving signals from a transmitter station for a first and a second spatial channel, the transmitter and receiver stations employing a closed-loop multiple-input multiple-output (MIMO) system; selecting a first modulation coding scheme (MCS) entry among a plurality of ordered MCS entries, the first MCS entry identifying a first MCS for use by the transmitter station to transmit signals to the receiver station; selecting, among the plurality of ordered MCS entries, a subset of lower ordered MCS entries relative to the first MCS entry; selecting a second MCS entry from one of the selected subset of lower ordered MCS entries, the second MCS entry identifying a second MCS for use by the transmitter station to transmit signals to the receiver station; determining a first channel Quality indicator (CQI) and a second CQI based at least in part on the measured channel qualities, wherein the first CQI directly indexes the first MCS entry in the ordered MCS entries, and the second CQI indirectly indexes the second MCS in the ordered MCS entries by indexing an MCS entry within the selected subset of lower ordered MCS entries relative to the indexed first MCS entry; and transmitting from the receiver station to the transmitter station the first and the second CQI.