Widely-linear selected mapping for peakto-average power ratio reduction in OFDM

Peak-to-average power ratio reduction in OFDM using selected mapping (SLM) is considered. A new low-complexity version of SLM is introduced which employs the principle of widely-linear signal processing, i.e. real and imaginary parts of the candidate OFDM frames are treated separately. Thereby, investing the numerical complexity of conventional SLM with U candidates, a performance almost equal to U candidates can be obtained with widely-linear SLM. Numerical simulations cover this performance.