An efficient companding transform combined with iterative filtering is proposed to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing with offset quadrature amplitude modulation (OFDM/OQAM) signals. The proposed method can jointly optimize PAPR and BER performance, and effectively eliminate out-of-band radiation caused by signal amplitude distortion in the iterative process. Moreover, by adaptively adjusting transform parameters in the iterative process, more design flexibility in companding and lower out-of-band radiation are given to satisfy various system requirements. The proposed method had a simple functional form and less computational complexity, the theoretical PAPR reduction gain and the impact of companding distortion were derived. Simulation results show that this scheme can substantially offer better overall performances in terms of PAPR reduction, BER performance and bandwidth efficiency.

提出了一种有效的压扩变换与迭代滤波相结合的方法，以降低正交正交频分复用与正交正交幅度调制（OFDM / OQAM）信号的峰均功率比（PAPR）。所提出的方法可以共同优化PAPR和BER性能，并有效消除迭代过程中信号幅度失真引起的带外辐射。此外，通过在迭代过程中自适应地调整变换参数，可以在压扩和降低带外辐射方面提供更多的设计灵活性，以满足各种系统要求。该方法具有简单的函数形式和较少的计算复杂度，推导了理论上的PAPR降低增益和压扩失真的影响。