quotation:		[Copy]
		[Copy]

This Paper:Browse 3254 Download 2894
利用星座扩展降低OFDM PAPR的新方法
尹志伟,万毅
0 Fontlarge +\|Default\|Small
(兰州大学信息科学与工程学院，兰州 730000)

摘要:

通过研究利用星座扩展降低OFDM中峰均功率比(PAPR)的方法，提出了一种寻找次最优映射向量的新方法——联合搜索(JS)算法。该算法联合相邻的若干子载波，通过比较局部的峰值大小搜索次最优映射向量。仿真结果表明，JS算法在降低计算复杂度、提高PAPR抑制增益以及增强应用灵活性等方面都有明显改进。

关键词: 正交频分复用峰均功率比星座扩展联合搜索算法

DOI：

基金项目:

A New PAPR Reduction Method via Constellation Extension for OFDM

YIN Zhi-wei,WAN Yi

(School of Information Science and Engineering, Lanzhou University, Lanzhou 7300 00,China)

Abstract:

Through investigating the PAPR(PeaktoAverage Power Ratio) reduction method via constellation extension, a new method is proposed to find a suboptimal constellation mapping solution,t he joint searching (JS) algorithm. The method searches the suboptimal mapping by combining several adjacent subcarriers and comparing the local peak value. Sim ulation results show that JS method performs better in the aspects of computatio na l complexity, PAPR suppression performance and application flexibility.

Key words: OFDM PAPR constellation extension joint searching algorithm