降低PTS方法复杂度的原理及应用  

The Principle and Application to the Reduction of PTS' Complexity

作　　者：王林[1] 江秀萍[1] 

机构地区：[1]西安理工大学自动化学院,西安710048

出　　处：《电子与信息学报》2007年第11期2585-2588,共4页Journal of Electronics & Information Technology

摘　　要：传统的降低OFDM信号峰均比值的部分传输序列(PTS)方法需计算全部相位旋转因子序列所对应的峰均比值,因而计算复杂度很大。该文分析了OFDM信号峰值出现的规律,提出了搜索合乎需求的相位旋转因子序列的一般性原则,并在此基础上提出了一种全新的降低PTS方法复杂度的方案。理论分析和仿真结果表明,该方法在大幅降低系统复杂度的同时,性能损失较少。The conventional PTS method of reducing OFDM signal＇s PAPR has large computation complexity because of the computation of all sets of the phase rotation vectors. In this paper, a general principle of finding appropriate phase rotation vectors by analyzing the rule of the appearance of peak value for OFDM signals is presented. Based on the principle, a novel method is proposed which can remarkably reduce the complexity of PTS with little degradation of system＇s performance, as illustrated by theoretical analysis and simulation results.

关 键 词：正交频分复用 峰均比 部分传输序列 复杂度 

分 类 号：TN919.3[电子电信—通信与信息系统]