Patent ID: 8837272

Claim:
A communication system comprising: a plurality of local antennas configured to receive a respective plurality of receive signals from a channel in response to a transmission of a plurality of OFDM signals by a remote system, wherein the OFDM signals utilize a common set of subcarriers, wherein the OFDM signals are transmitted onto the channel by respective remote antennas belonging to the remote system; a controller, wherein, for each of the OFDM sub-carriers, the controller is configured to: estimate a corresponding channel matrix based on the receive signals; compute a corresponding channel condition based on the corresponding channel matrix; determine a corresponding transmission type decision based on the corresponding channel condition, wherein the transmission type decision represents a selection between space-time transmit diversity (STTD) and spatial multiplexing (SM); wherein the controller is further configured to transmit feedback information to the remote system, wherein the feedback information encodes the transmission type decisions of the respective subcarriers.