Patent ID: 7944985

Claim:
A multiple-input multiple-output (MIMO) transmitter configured to operate in a plurality of modes, the MIMO transmitter comprising: N T transmit antennas for transmitting spatial streams; a precoder; and a space-time or space-frequency matrix construction unit in communication with the precoder and the transmit antennas, wherein the space-time or space-frequency matrix construction unit constructs a matrix that defines a threaded algebraic space-time (TAST) codeword based on a number of virtual antennas, N v , and the number of transmit antennas, N T , wherein the transmitter operates in an open loop mode when no feedback information is available, the transmitter operates in a semi-open loop mode when channel rank feedback information is available, and the transmitter operates in a closed loop mode when channel state information (CSI) is available.