Patent ID: 7430244

Claim:
A transmitter for transmitting data through a plurality of transmit antennas in a wireless communication system including the transmitter and a receiver for receiving the data through a plurality of receive antennas, the transmitter comprising: a constellation-rotating precoder for generating P m th -order sub-rotated vectors {right arrow over (r)} i by constellation-rotating an L th -order input vector {right arrow over (x)} including a plurality of input symbols modulated in at least one modulation scheme; an accumulator for generating m p th -order sub-vectors {right arrow over (u)} i using the sub-rotated vectors {right arrow over (r)} i ; and a space-time block coder for generating codeword matrices A i ({right arrow over (u)} i ) by performing orthogonal space-time block coding on the sub-vectors {right arrow over (u)} i .