Patent ID: 8111772

Claim:
A method for multi-antenna transmitting based on spatial-frequency encoding, comprising: performing a spatial-frequency encoding on input data and outputting multiple ways of encoded data; mapping the multiple ways of encoded data to the same sub-carrier of each antenna in an antenna group; adding a phase shift to each way of encoded data on different sub-carriers of each antenna; performing orthogonal frequency division multiplexing (OFDM) modulation on each way of phase-shifted encoded data on each antenna; and transmitting the OFDM-modulated data through transmit antennas; grouping multiple transmit antennas, wherein the number of antenna groups is equal to the number of ways of space frequency encoded data when space frequency block code (SFBC) is used; and the number of antenna groups is 1 when spatial multiplexing coding is used; wherein the phase-shifted encoded data on each antenna is added up and then OFDM-modulated when the spatial-frequency encoding is spatial multiplexing coding; wherein the phase shift meets the following conditions: the phase shift of the encoded data on the same transmit antenna changes every n sub-carrier sets; the phase shifts of different ways of data on the same sub-carrier of the same transmit antenna are different; and the phase shifts on the same sub-carrier of different transmit antennas in the same antenna group are different, wherein n is a positive integer.