Spatial phase coding with efficient feedback encoder for wireless OFDM systems

Diversity techniques have been widely used in wireless communication systems because they provide better signal quality in fading channel environments, increasing its capacity. Recently, a new diversity scheme called spatial phase coding (SPC) requiring 1-bit feedback in each subcarrier is introduced. In this paper, a feedback encoder which is more efficient than conventional SPC is proposed. Furthermore, the scheme to improve the BER performance of conventional SPC using 1-bit feedback is suggested.