Patent ID: 8248909

Claim:
A device for the baseband process of a space-time diversity transmitter, comprising an M-point DFT module, a space-time encoder and a mapper, wherein: said space-time encoder is connected between the output end of said M-point DFT module and the input end of said mapper, wherein, M represents the amount of sub-carriers allocated to a user; wherein said space-time encoder is operative to encode corresponding symbols from at least two adjacent symbol sets, said two adjacent symbol sets being outputted by the M-point DFT module, and outputting at least two data sets, two data sets of the at least two data sets corresponding to two transmitting antennas under one-to-one correspondence, wherein: each of said symbol sets comprises M symbols; said mapper comprises at least two sub-carrier mappers, said two sub-carrier mappers being operative to map the two data sets to the corresponding antennas, so that the data after mapping satisfy: the symbols mapped onto each antenna keep the same sequence as compared with the M symbols outputted by the M-point DFT module; and/or the mapped symbols keep the same sub-carrier interval; and/or the M data of each mapped SC-FDMA symbol are the M outputted data of the DFT module, or the inverse of the M outputted data, or the complex conjugate of the M outputted data, or the inverse complex conjugate of the M outputted data.