摘要
OFDM系统的一个主要缺点是信号的PAPR很高.如何降低OFDM中的PAPR是有效应用OFDM技术的关键之一.由于PTS算法的复杂度太大,不容易在应用中实现.而IPTS算法可以降低PTS算法的复杂度,但性能与PTS算法性能相比还有一定的差距.本文提出一种改进算法,该算法通过设置不同的门限值,对属于不同门限值的PAPR符号采用不同的算法来降低PA-PR.仿真结果表明,改进算法在大幅度降低复杂度的同时,可以得到较好的性能.如果适当改变门限值,可以在复杂度与性能之间达到折衷.
Orthogonal frequency division multiplexing （OFDM） system＇s one of the main characteristic is the signal peak power and average power ratio （PAPR） high. How to reduce the OFDM of PAPR is the key to effective application technology of the OFDM. Due to the complexity of the PTS algorithm is too big, Its not easy to realize in the application. While IPTS algorithm can reduce the complexity of the PTS algorithm, but the performance and PTS algorithm performance has a certain gap. This paper proposed a kind of improved algorithm, this algorithm through setting different threshold, In a sign of OFDM PAPR belong to different threshold use different algorithms to reduce PAPR. Simulation results show that. The improved algorithm at the same time at greatly reduced complexity, PAPR can get good performance. If appropriate change the threshold value, in the complexity and performance can be reached between compromise.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第2期223-226,共4页
Journal of Central China Normal University：Natural Sciences
关键词
正交频分复用
峰均比
部分传输序列
复杂度
OFDM （Orthogonal Frequency Division Multiplexing）
PAPR （Peak-to-Av erage Power Ratio）
PTS （Partial Transmit Sequence）
complexity
