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A combined PTS-companding scheme for PAPR reduction in OFDM system

One of the main disadvantages of Orthogonal Frequency Division Multiplexing (OFDM) communication system is its high peak-to-average power ratio (PAPR). A PAPR reduction scheme for OFDM system which combines the partial transmit sequence (PTS) and the companding transformation is proposed. It takes advantage of the PTS, which does not cause signal distortion with linear transform, and the companding transformation, which is simple and direct. The simulation results show that the new scheme improves the PAPR performance about 0.5dB and 6dB respectively compared to the PTS and companding transformation, and ensures the bit error rate (BER) and transmission rate at the same time.