Patent ID: 8711828

Claim:
A method for transmitting data using spatial multiplexing, the method comprising: modulating at least one codeword to generate at least one modulation symbol; mapping the at least one modulation symbol to a layer whose number is determined according to its rank, to generate a layer-mapped symbol stream; performing discrete Fourier transform (DFT) on the layer-mapped symbol stream to generate a frequency domain symbol stream; performing precoding on the frequency domain symbol stream; mapping the precoded frequency domain symbol stream to subcarriers, and then performing inverse fast Fourier transform (IFFT) on the precoded frequency domain symbol stream-mapped subcarriers to generate SC-FDMA symbols; and transmitting the SC-FDMA symbols by using a plurality of transmission antennas, wherein the performing of precoding comprises: separately mapping the plurality of transmission antennas to each virtual antenna or mapping the plurality of transmission antennas to a single virtual antenna; and performing permutation so that the at least one codeword can be distributedly transmitted through all of the plurality of transmission antennas.