OFDM 系统中利用概率类技术抑制 PAPR 算法的 Matlab 实现和应用【摘要】本文介绍了基于降低 OFDM 系统中峰均功率比的两种概率类方法及其算法，并借助 Matlab 软件对其进行编程仿真与验证。OFDM 是一种多载波调制技术，其特有的调制特性决定了它有较高的峰均功率比。高峰均功率比信号会对实际放大器提出很高的线性要求,因此它是限制 OFDM 技术有用化的主要障碍。本文总结了运用概率类技术降低 OPDM 峰均功率比的方法，包括：选择映射（SLM），部分传输序列（PTS）。SLM 是一种无失真降低信号峰均功率比的有效方法，而 PTS 部分传输序列(PTS）方法通过选择合适的相位旋转因子序列以降低信号峰值出现的概率，从而降低 OFDM 信号的峰均比值。本文对这两种方法进行具体详细的分析整理,最后通过 matlab 软件编程实现实验结果。通过仿真验证,当随机信号通过 SLM 或者 PTS 模块的时候能够有效的降低 PAPR 值。【关键词】正交频分复用； 选择映射; 部分传输序列； Matlab；Matlab Research on probability technique for PAPR reductionin OFDM system【Abstract】This paper introduces two important PAPR reduction techniques and program which are based on reduction peak to average power ratio of OFDM system，and with the help of Matlab software programming and analysing two PAP reduction techniques.Orthogonal frequency division multiplexing （OFDM) is a promising transmission scheme for broadband communications over a wireless channel. In OFDM data is transmitted simultaneously through multiplefrequency bands. Its specific modulating characteristic decide high PAPR appear。A signal of high power will peak of actual proposed high linear amplifier requirements, so it is restricted OFDM technology the main obstacle to practical.Partialtransmit sequence (PTS) and selective mapping （ SLM ） are another two important PAPR reduction techniques.this paper presents a simplified version ofpartial transmit sequences (PTS ） .SLM is a effective ways of no distortion reduce PAPR,and PTS is a way b...
