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应用科学学报 ›› 2007, Vol. 25 ›› Issue (1): 103-107.

• 论文 • 上一篇    下一篇

无线OFDM系统中自适应交织的设计

徐晓东, 井雅, 尤肖虎, 陈明   

  1. 东南大学移动通信国家重点实验室, 江苏南京 210096
  • 收稿日期:2005-12-16 修回日期:2006-04-12 出版日期:2007-01-31 发布日期:2007-01-31
  • 作者简介:徐晓东,博士生,研究方向:移动通信系统中的自适应调制技术,E-mail:xudong@seu.edu.cn;尤肖虎,教授,博导,研究方向:智能信号处理与通信等,E-mail:xhyu@seu.edu.cn;陈明,教授,研究方向:无线通信中基带信号处理算法研究等,E-mail:chenming@seu.edu.cn
  • 基金资助:

    国家自然科学基金资助项目(60496311)

Design of Adaptive Interleaving in Wireless OFDM Systems

XU Xiao-dong, JING Ya, YOU Xiao-hu, CHEN Ming   

  1. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
  • Received:2005-12-16 Revised:2006-04-12 Online:2007-01-31 Published:2007-01-31

PDF

117

被引次数

6

摘要：

在无线OFDM系统中,利用信道状态信息,实时改变交织图案的自适应交织技术较固定的分组交织,可以更有效地将突发错误离散为随机错误,从而有效提高了系统性能.该文提出了一种改进的自适应交织技术,不仅进一步提高了系统性能,尤其是系统的误帧率性能,而且使算法实现的复杂度有所降低.

关键词: 正交频分复用, 自适应交织, 频选衰落信道

Abstract:

In modern communication systems, only combined with interleaving techniques can error correction codes effectively improve the system performance.In wireless OFDM systems, adaptive interleaving techniques based on instantaneous subcarrier channel state information can break burst errors more effectively into random errors, achieving a better system performance than traditional block interleaving.This paper proposes an improved adaptive interleaving scheme that not only achieves a better system performance, especially the frame error rate (FER), but also reduces the algorithm complexity.

Key words: OFDM, adaptive interleaving, frequency-sective fading channels

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