基于格雷码的低计算量改进PTS方法

An Improved PTS Method with Low Computational Complexity Based on Gray Code

部分传输序列(PTS)方法能够有效地降低OFDM系统峰均功率比(PAPR)过高的问题,但是该方法的主要缺点是计算复杂度高。针对这一缺点,提出一种新的低计算复杂度PTS方法,采用格雷码生成加权系数序列,使之在降低运算量的同时更易于硬件实现。分析和仿真结果表明,和传统PTS方法相比,该方法降低了运算量和实现复杂度,同时保持了系统PAPR的性能。

Partial Transmit Sequence（PTS） scheme is efficient to reduce high Peak-to-Average Power Ratio（PAPR） in OFDM system.However,conventional PTS scheme requires large computational complexity.To overcome this drawback,an existing low computational complexity PTS method is improved,which utilizes Gray code to generate weighting sequence.This method is easier to implement while reducing the computation.Numerical results show that the improved method can perform as better as conventional PTS with lower computational and implemental complexity.