Curve Fitting Based Tone Reservation Method with Low Complexity for PAPR Reduction in OFDM Systems

In this letter, a novel curve fitting based tone reservation (CF-TR) method is proposed to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems, and its key idea is to utilize the clipping noise introduced by clipping to generate an ideal peak-canceling signal. To effectively eliminate the peaks of the OFDM signal, the CF-TR method generates the peak-canceling signal by directly fitting the waveform of the peak-canceling signal to the waveform of clipping noise. The proposed CF-TR method obtains significant PAPR reduction with very few iterations, and only one IFFT operation is required at each iteration, resulting in dramatic reduction of the computational complexity.