Patent ID: 7227905

Claim:
A method for use in a system adapted to transmit at least four series of transmit sequences over at least four transmit antennas, the method comprising the step of: space-time coding at least two pairs of symbol sub-streams, each of the pairs of symbol sub-streams being space-time coded to form a respective pair of the transmit-sequence chains, the space-time coding being such that at least one of the formed pairs of the transmit-sequence chains is a function of symbols of the respective pair of symbol sub-streams and not a function of the symbols of the other pair of symbol sub-streams; wherein each transmit sequence of a particular transmit-sequence chain is a function of 1) a symbol of one of the symbol sub-streams of the respective symbol sub-stream pair and 2) a complex conjugate of a symbol of the other symbol sub-stream of the respective symbol sub-stream pair.