Side Information Power Allocation for MIMO-OFDM PAPR Reduction by Selected Mapping

Multiple-input-multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) has been receiving a great deal of attention as a solution for high-quality service for next generation wireless communications. However one of main problems of orthogonal frequency division multiplexing (OFDM) is its high peak-to-average power ratio (PAPR) which seriously limits power efficiency of high power amplifier (HPA). In this paper, we present PAPR reduction technique of V-BLAST based MIMO-OFDM system. We use the selected mapping (SLM) technique as a PAPR reduction technique since it does not cause any signal distortion. As a special protection for side information (SI) of SLM technique, we propose SI power allocation technique. Simulation results show that proposed technique gives significantly better BER performance than ordinary SLM technique for MIMO-OFDM systems.