一种降低OFDM峰均比的PTS技术

为有效降低正交频分复用系统峰均功率比,以最大效率开发利用电力线通信资源,提出了一种低复杂度的基于部分传输序列的改进技术。该技术在已调信号实部和虚部分别与相位因子相乘来降低峰均功率比的基础上,采用迭代算法优化相位因子,减小计算复杂度。仿真结果表明,算法以较快的收敛速度取得较优的相位序列,显著地降低了正交频分复用系统的峰均比,提高了低压电力线通信系统的性能。

An Improved PTS Technique for PAPR Reduction in OFDM System

In order to Reduce the high Peak to Average Power Ratio（PAPR）of Orthogonal Frequency Division Multiplexing（OFDM）signal and develop the resource of low voltage power line communication（PLC）efectively,this paper proposes a low-complexity improved technique based on patical transmit sequences（PTS）.To reduce higher computational complexity,the iterative algorithm to is adopted optimize phase factor,in which real and virtual parts of the modulated singal are separately multiplied with phase factors.Simulation result shows that the algorithm could with fast convergence speed,achieve excellent phase factor,reduce remarkably the PAPR of the OFDM system,and improves effectively the performance of PLC.