A Novel Space-Frequency Block Coding Scheme for SC-FDMA

Single carrier frequency division multiple access (SCFDMA) has been adopted as a possible air interface for future wireless networks as it combines the advantages of Orthogonal Frequency Division Multiple Access (OFDMA) and the low envelope variation properties of single carrier (SC) transmission. The classical transmit antenna diversity technique as Space-Frequency Block Coding (SFBC) will harm single-carrier property and thus enhance the power amplifier efficiency of the mobile terminal. To solve this problem, a modified scheme of SFBC compatible with SC-FDMA is proposed in this paper. The proposed SFBC scheme is based on the groups rather than the symbols which remains the same signal distribution as the equivalent SC transmission. As a result, the PAPR of the proposed SFBC scheme is reduced. Simulation results show that the proposed SFBC scheme has good PAPR and Bit Block Error Rate (BLER) on frequency selective MIMO channels.