Patent ID: 8670496

Claim:
A base station, comprising: a transmit path circuitry configured to transmit an uplink grant to a subscriber station, the uplink grant indicating a first modulation and coding scheme (MCS) value for a first codeword transmission and a second MCS value for a second codeword transmission; and a receive path circuitry configured to receive a multiple-input multiple-output (MIMO) uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission, wherein acknowledgement/negative acknowledgement (ACK/NACK) information and rank indication (RI) information are mapped onto both the first subset of layers and the second subset of layers, and channel quality information (CQI) is only mapped onto either the first subset of layers or the second subset of layers.