Patent ID: 7864659

Claim:
A method of increasing capacity in Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) wireless communications, the method comprising: in a receiver, setting an initial target quality of service (QoS t ) metric and a corresponding reference data rate (q r ), wherein the QoS t is a bit error rate (BER) that is either stored, pre-defined or set; measuring a QoS (QoS m ) metric of a received signal and calculating the difference between the QoS m and QoS t ; and generating and sending a channel quality indicator (CQI) to a transmitter, the CQI based on the calculated difference between the QoS m and QoS t ; wherein the received signal is a data frame (j) of a sub-carrier group (i); wherein the difference between the measured QoS m and the target QoS t is calculated according to the equation: Î”QoS mt(i,j) =QoS m(i,j) âˆ’QoS t(i,j) , wherein Î”QoS mt(i,j) represents the calculated difference for the j th data frame in the i th sub-carrier group; generating the CQI based on the calculated difference (Î”QoS mt(i,j) ) being larger than one-half the difference between a QoS value associated with the transmitted data rate (q) and a QoS value associated with the next highest data rate (q+1) (Î”QoSq (i,q) represented by expression: Î”QoS mt(i,j) >Î”QoSq (i,q) /2, wherein the CQI indicates to the transmitter to increase the transmitted data (q) rate to the next highest data rate (q+1); sending the CQI to the transmitter; and increasing the target quality of service (QoS t(i,j) ) metric by increasing the target QoS metric of a previous frame (QoS t(i,jâˆ’1) ) according to expression: QoS t(i,j) =QoS t(i,jâˆ’1) +Î”QoSq (i,q) /2.