Directed Selected Mapping for Peak-to-Average Power Ratio Reduction in Single-Antenna OFDM

The high peak-to-average power ratio of the transmit signal is a serious drawback of multicarrier transmission. To cope with this problem, peak power reduction schemes have been developed. One popular method is selected mapping (SLM), where several alternative representations are generated from the information carrying signal and that one which exhibits the lowest peak power is selected for transmission. Increasing the number of alternative candidates, i.e., spending higher computational complexity, better peak power reduction can be achieved. In this paper, a novel approach of SLM is presented, which considers a number of consecutive OFDM frames, a hyper frame, jointly. A trade-off between complexity and introduced delay is possible. Choosing an appropriate combination of number of assessed candidates and hyper frame lengths significant gains over conventional SLM can be achieved.