Patent ID: 8223624

Claim:
An apparatus for transmitting a data stream over a communication channel, the apparatus comprising: a plurality of transmit antennas; means for dividing data into a first set of data and a second set of data wherein the data comprises eight data symbols S 1 , S 2 , S 3 , S 4 , S 5 , S 6 , S 7 , S 8 , means for coding the first set in accordance with a space time block code to generate a coded set of data; means for creating a plurality of parallel data streams from the coded set and the second set, each parallel data stream being allocated to one of the plurality of antennas and the parallel data streams comprise the data symbols substantially given by:  S 7 - S 2 * S 1 S 8 S 1 * S 2 S 3 - S 4 * S 5 S 4 S 3 * S 6  wherein each row represents a parallel data stream associated with one antenna and each column represents a transmit symbol time and * denotes complex conjugation; and means for transmitting the data in the communication channel by transmitting the parallel data streams in parallel from the plurality of transmit antennas.