摘要
针对传统部分传输序列(Partial Transmit Sequence,PTS)算法在改善正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)系统峰均功率比(Peak to Average Power Ratio,PAPR)时存在较高计算复杂度问题,文章提出了一种改进PTS算法.该算法利用分治思想对候选相位因子序列进行分组,降低其序列维度;结合相位加权序列的特点,进一步降低需遍历的候选序列个数,从而降低了计算复杂度.与传统的PTS算法对比,所提出的改进算法在改善PAPR性能的同时,较大地降低了计算复杂度.
Abstract
Aiming at the problem of high computational complexity for improving the peak to average ratio of OFDM systems with traditional PTS algorithms,the improved PTS algorithm is proposed in this paper.The algorithm uses the divide and conquer idea to group candidate phase factor sequences,reduce their sequence dimensions,and combines the characteristics of phase weighted sequences to further reduce the number of candidate sequences that need to be traversed,thereby achieving the goal of reducing computational complexity.Compared with the traditional PTS algorithm,the improved algorithm proposed in this paper significantly reduces the computational complexity while ensuring improvement in PAPR performance.
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