对称双二叉树PTS相位搜索

doi:10.3969/j.issn.0255-8297.2013.03.009

应用科学学报 ›› 2013, Vol. 31 ›› Issue (3): 271-277.doi: 10.3969/j.issn.0255-8297.2013.03.009

对称双二叉树PTS相位搜索

何选森，曾庆芳，吴良敏

湖南大学信息科学与工程学院，长沙410082

收稿日期:2011-10-04 修回日期:2011-11-16 出版日期:2013-05-28 发布日期:2011-11-16
通信作者: 何选森，副教授，研究方向：信号处理，E-mail: hxs2010@hnu.edu.cn，hxshf@vip.sina.com
作者简介:何选森，副教授，研究方向：信号处理，E-mail: hxs2010@hnu.edu.cn，hxshf@vip.sina.com
基金资助:
国家自然科学基金(No. 61072122)资助

PTS Phase Search with Symmetrical Dual Binary Tree

HE Xuan-sen, ZENG Qing-fang, WU Liang-min

College of Information Science and Engineering, Hunan University, Changsha 410082, China

Received:2011-10-04 Revised:2011-11-16 Online:2013-05-28 Published:2011-11-16

摘要/Abstract

摘要： 为降低OFDM系统中部分传输序列的计算复杂度，提出一种对称双二叉树的相位搜索方法，将最优相位因子的搜索映射为满二叉树中代价最小通路的搜索. 通过选择中间节点数量与二叉树的搜索深度，在有效抑制OFDM峰值平均功率比的同时大幅度降低了计算复杂度. 仿真结果表明，该方法能很好地协调OFDM系统性
能和计算复杂度.

关键词: 正交频分复用, 部分传输序列, 峰值平均功率比, 对称双二叉树

Abstract: To reduce computation complexity of the partial transmit sequence (PTS) for OFDM systems, a symmetrical dual binary tree search method is proposed, in which the search of the optimum phase factor is mapped to the search of a minimum cost path of a full binary tree. By selecting the number of intermediate
nodes and the search depth, the proposed method effectively reduce both peak-to-average power ratio (PAPR) and the computation complexity of PTS. Simulation results show that the method can make a good tradeoff between the computation complexity and the OFDM performance.

Key words: orthogonal frequency division multiplexing (OFDM), partial transmit sequence (PTS), peak-toaverage power ratio (PAPR), symmetrical dual binary tree

中图分类号:

TN929.5

何选森，曾庆芳，吴良敏. 对称双二叉树PTS相位搜索[J]. 应用科学学报, 2013, 31(3): 271-277.

HE Xuan-sen, ZENG Qing-fang, WU Liang-min. PTS Phase Search with Symmetrical Dual Binary Tree[J]. Journal of Applied Sciences, 2013, 31(3): 271-277.

参考文献

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对称双二叉树PTS相位搜索

PTS Phase Search with Symmetrical Dual Binary Tree

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