Simple Alternative Multisequences for PAPR Reduction Without Side Information in SFBC MIMO-OFDM Systems

In this paper, we propose a novel alternative multisequence (AMS) scheme for the peak-to-average power ratio (PAPR) reduction in multiple-input-multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems with space-frequency block coding (SFBC). The key idea of the proposed scheme is keeping the advantage of the SFBC structure to generate some AMSs via combining the signals at different transmit antennas. Specifically, when the proposed scheme is employed in SFBC MIMO OFDM systems with quadrature-amplitude modulation (QAM), one of the big advantages is that the side information (SI) does not need to be sent to the receiver. Theoretical analysis and simulation results validate that the proposed scheme has the ability to provide large PAPR reduction, a low bit error rate, and low computational complexity without SI in SFBC MIMO-OFDM systems.