一种OFDM系统峰均比的改良PTS算法  

A kind of the PAPR of OFDM system using improved PTS method

作　　者：李欣[1] 胡晓天[1] 管绍军[1] 孙继明[1] 

机构地区：[1]哈尔滨理工大学测控技术与仪器黑龙江省高校重点实验室,黑龙江哈尔滨150080

出　　处：《电子设计工程》2012年第5期45-47,50,共4页Electronic Design Engineering

摘　　要：部分传输序列(PTS)方法通过选择合适的相位序列以降低信号峰值出现的概率,该方法不会使信号发生畸变。但是传统的PTS技术计算复杂度非常大,需遍历所有可选的相位因子,其计算量随分割子序列数按指数增长。本文提出了一种正倒二叉树多层相位序列方法,该方法通过对称的树形搜索,搜索出最优的相位序列。仿真结果表明,该方法大大降低系统的复杂度,同时PAPR得到更好地抑制。Partial Transmit Sequence （PTS） method by choosing the appropriate phase sequence to reduce the probability of the Signal peak, this method does not make the signal distortion. But conventional PTS technique is very large computational complexity, needing to traverse all the optional phase factor, its calculation sequence as the number of separate exponential growth. In this paper, proposing a multi-phase sequence is inverted binary tree method, this method by symmetrical tree searching, searching out the optimal phase sequence. Simulating results show that the method reduces the system complexity, while better suppress the PAPR.

关 键 词：正交频分复用 峰均比 部分传输序列 二叉树 

分 类 号：TP911[自动化与计算机技术]