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SLM and PTS based on an IMD reduction strategy to improve the error probability performance of non-linearly distorted OFDM signals

In this paper, we propose using selective mapping (SLM) and partial transmit sequences (PTS) based on an intermodulation distortion (IMD) reduction strategy to improve the error probability performance of non-linearly distorted orthogonal frequency division multiplex (OFDM) signals. Simulation results demonstrate that in the presence of nonlinearities OFDM systems using SLM or PTS with IMD reduction perform better than those with peak-to-average power ratio (PAPR) reduction. Additionally, simulation results demonstrate that the average out-of-band power generated by IMD reduction strategies is lower than that generated by PAPR reduction strategies. Finally, we propose a sub-optimum solution for the practical realization of SLM OFDM and PTS OFDM systems based on IMD reduction which does not result in a significant loss in performance.