东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (4): 503-506.DOI: -

• 论著 • 上一篇    下一篇

一种降低SFBC MIMO-OFDM系统峰均功率比的新算法

沙毅;陈俊鑫;陈进;王光兴;   

  1. 东北大学信息科学与工程学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-04-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(10878017)

A new PAPR reduction algorithm for SFBC MIMO-OFDM system

Sha, Yi (1); Chen, Jun-Xin (1); Chen, Jin (1); Wang, Guang-Xing (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-04-15 Published:2013-06-20
  • Contact: Sha, Y.
  • About author:-
  • Supported by:
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摘要： 为了降低SFBC MIMO-OFDM系统的峰均功率比,提出了二次部分传输序列(twice-partial transmit sequence,T-PTS)算法.该算法首先对序列进行相邻分割,再对每一个相邻分割子块进行交织分割,然后对相邻子块和交织子块进行两次相位旋转,从中选择具有最小峰均功率比的序列进行传输,以降低峰均功率比.为简化权值的搜索过程,利用SFBC的编码特性及IFFT的圆周移位特性和共轭特性,对T-PTS算法进行次优化处理,引出RT-PTS(reduced T-PTS)算法,旨在最大程度地降低运算复杂度.仿真结果表明,与传统抑制算法相比,RT-PTS算法可以在降低运算复杂度的同时,...

关键词: 正交频分复用, 多输入多输出, 空频分组码, 峰值平均功率比, 二次部分传输序列

Abstract: A new algorithm named twice-partial transmit sequence (T-PTS) algorithm is proposed to reduce the PAPR of SFBC MIMO-OFDM system. In this algorithm, a transmit sequence is partitioned adjacently, and then every adjacent partitioned subblock is repartitioned in an interlacing way. After rotating both the adjacent and interlaced subblocks twice, a best sequence whose PAPR is minimal is chosen to transmit so as to reduce PAPR. To simplify the search process of weights, a RT-PTS (reduced T-PTS) algorithm, which takes advantage of SFBC in combination with the circular shift and conjugation of IFFT, is proposed to suboptimize the T-PTS algorithm, thus reducing the computation complexity. Simulation results showed that the RT-PTS algorithm can restrict the PAPR effectively at the same time of keeping low computation complexity in comparison with conventional methods.

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