Patent ID: 8488705

Claim:
A symbol generation apparatus comprising: a plurality of space-time channel encoders respectively corresponding to a plurality of channels, wherein each of the plurality of space-time channel encoders performs space-time encoding of a digital-modulated symbol group received from a corresponding channel with respect to a plurality of space areas and at least one time area and shifts phases by using a plurality of phase values to generate a plurality of phase-shifted space-time codewords; and an inverse Fourier transformer group for performing an inverse Fourier transform operation with the plurality of phase-shifted space-time codewords in a plurality of subcarriers respectively corresponding to the plurality of channels to generate a plurality of inverse Fourier transformed signals, wherein each of the space-time channel encoders comprise: a space-time encoder for encoding the received digital-modulated symbol group with respect to a plurality of space areas and at least one time area to generate a space-time codeword; and a plurality of phase shifter groups respectively corresponding to the plurality of space areas, wherein each of the plurality of phase shifter groups shifts phases of a symbol corresponding to the corresponding space area among symbols in the space-time codeword by using the plurality of phase values to generate a phase-shifted space-time codeword.