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

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.