Patent ID: 8064428

Claim:
A method for ordering retransmissions in a Multi-Input Multi-Output (MIMO) system using N×M antennas, the method comprising: splitting, at a transmitter, a coded data stream into N sub-packets, and transmitting the N sub-packets to a receiver via N transmission antennas; removing, at the receiver, interferences of the N sub-packets received via M reception antennas, and independently decoding the interference-removed sub packets; transmitting, at the receiver to the transmitter, one of an acknowledgement (ACK) and a negative acknowledgement (NACK) depending on errors included in the decoded sub-packets; and upon receipt of the NACK, retransmitting to the receiver, at the transmitter, a sub-packet retransmission based on an Alamouti space-time coding scheme in descending order of signal to noise ratios (SNRs).