Patent ID: 7991063

Claim:
A method for transmission in a communication system, the method comprising: modulating data to be transmitted by using a certain modulation scheme to generate a plurality of modulated symbols; establishing a transmit diversity scheme for at least a group of four symbols S 1 , S 2 , S 3 and S 4 from among the plurality of modulated symbols, with the transmit diversity scheme being established such that two transmission matrices T 1 and T 2 are alternatively applied in a frequency domain, and the two transmission matrices T 1 and T 2 being respectively established by: T 1 = [ T 11 T 12 T 13 T 14 T 21 T 22 T 23 T 24 T 31 T 32 T 33 T 34 T 41 T 42 T 43 T 44 ] = [ S 1 S 2 0 0 - S 2 * S 1 * 0 0 0 0 S 3 S 4 0 0 - S 4 * S 3 * ] , ⁢ and T 2 = [ T 11 T 12 T 13 T 14 T 21 T 22 T 23 T 24 T 31 T 32 T 33 T 34 T 41 T 42 T 43 T 44 ] = [ S 3 S 4 0 0 - S 4 * S 3 * 0 0 0 0 S 1 S 2 0 0 - S 2 * S 1 * ] , where T ij represents the symbol to be transmitted on the ith antenna and the jth subcarrier; and transmitting the four symbols S 1 , S 2 , S 3 and S 4 via four antennas in accordance with the transmit diversity scheme.