东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (6): 826-829.DOI: -

• 论著 • 上一篇    下一篇

基于STBC MIMO-OFDM系统特性的并行选择映射算法

高静;汪晋宽;解志斌;   

  1. 东北大学信息科学与工程学院;东北大学信息科学与工程学院;东北大学信息科学与工程学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-06-15 发布日期:2013-06-22
  • 通讯作者: Gao, J.
  • 作者简介:-
  • 基金资助:
    教育部高等学校博士学科点专项科研基金资助项目(20050145019)

Novel concurrent selective mapping algorithm based on property of STBC MIMO-OFDM systems

Gao, Jing (1); Wang, Jin-Kuan (1); Xie, Zhi-Bin (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-06-15 Published:2013-06-22
  • Contact: Gao, J.
  • About author:-
  • Supported by:
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摘要： 正交频分复用(OFDM)技术是第四代移动通信系统的核心技术之一,但是高峰均功率比(PAPR)问题的存在一直是该技术实用化的主要障碍.针对该问题,证明了基于空时分组码的MIMO-OFDM系统中,共轭信号具有相同的峰均功率比特性,提出了基于相同峰均比特性的并行选择映射算法.所提算法不仅保持了已有并行选择映射算法的峰均比降低性能,同时有效地减少了算法复杂度,降低了边带信息的传输量,提高了系统的频带利用率.仿真实验结果证明了所提算法的有效性.

关键词: 多输入多输出, 正交频分复用, 峰均功率比, 选择映射, 空时分组码

Abstract: The orthogonal frequency division multiplexing (OFDM) has been regarded as the core technology of 4 G wireless communications system in the future, but the problem of high peak-to-average power ratio (PAPR) is the main obstacle to limit the applications of OFDM. A novel concurrent selective mapping (SLM) algorithm is thus proposed to reduce the PAPR in space-time block coded (STBC) MIMO-OFDM systems. It is proved that the conjugate symbols of two antennas have the same PAPR property, which results in that PAPR reduction to be done is only for the first symbol period. By using the property in the proposed algorithm, the cost due to computational complexity is significantly reduced with the same PAPR performance kept in comparison with the conventional concurrent SLM algorithm. Simulation results demonstrated that the performance of the proposed algorithm outperforms the conventional concurrent SLM algorithm.

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