A PAPR Reduction Method for STBC MIMO-OFDM Systems Using SLM in Combination with Subband Permutation

Abstract

Multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is an attractive transmission technique for high-bit-rate communication systems. MIMO-OFDM has become a promising candidate for high performance 4G broadband wireless communications. However, like OFDM, one main disadvantage of MIMO-OFDM is the high peak-to-average power ratio (PAPR) of the transmitter's output signal on different antennas. The selected mapping (SLM) approach provides good performance for PAPR reduction, but applying separately on each antenna this method doesn't benefit additional degrees of freedom providing by the use of multiple antennas. In this paper, we propose a more efficient solution using SLM in combination with sub band permutation.