Apparatus and method for data transmission using transmit diversity in SC-FDMA system

An apparatus for data transmission, the apparatus comprising:

• a data processor encoding an information bit and generating a modulation symbol by performing constellation mapping on the encoded information bit;
• a discrete Fourier transform (DFT) unit performing DFT on the modulation symbol to generate a frequency-domain symbol;
• a space time block coding (STBC) processor performing STBC on the frequency-domain symbol to generate an STBC code having 1st and 2nd STBC streams;
• a subcarrier mapper mapping the 1st STBC stream to a 1st subcarrier and mapping the 2nd STBC stream to a 2nd subcarrier, wherein the 1st subcarrier belongs to a 1st rsource block and the 2nd subcarrier belongs to a 2nd resource block while the 1st and 2nd resource blocks are located at the same frequency band of different slots;
• an inverse fast Fourier transform (IFFT) unit performing IFFT on the 1st subcarrier to generate a 1st single carrier-frequency division multiple access (SC-FDMA) symbol and performing IFFT on the 2nd subcarrier to generate a 2nd SC-FDMA symbol;
• and
• a plurality of transmit antennas transmitting the 1st and 2nd SC-FDMA symbols,
• wherein the 1st SC-FDMA symbol and the 2nd SC-FDMA symbol are included in different slots.