电信科学 ›› 2009, Vol. 25 ›› Issue (8): 46-50.doi: 10.3969/j.issn.1000-0801.2009.08.012

• 研究与开发 • 上一篇    下一篇

子载波间隔自适应OFDM系统研究

贾国庆1,2,熊勇1,2,杨秀梅1,2   

  1. 1 中国科学院上海微系统与信息技术研究所 上海 200050
    2 上海无线通信研究中心 上海 200335
  • 出版日期:2009-08-15 发布日期:2009-08-15
  • 基金资助:
    国际科技合作基金资助项目;中国科学院上海微系统与信息技术研究所青年创新基金资助项目

Research on Spectrum Efficiency Maximizing of OFDM System

Guoqing Jia1,2,Yong Xiong1,2,Xiumei Yang1,2   

  1. 1 Shanghai Institute of Micro-system and Information Technology，Chinese Academy of Sciences，Shanghai 200050，China
    2 Shanghai Research Center for Wireless Communications，Shanghai 200335，China
  • Online:2009-08-15 Published:2009-08-15

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被引次数

5

摘要：

随着无线技术的发展，对正交频分复用系统的频谱效率要求越来越高，子载波间隔是影响系统频谱效率的主要因素。本文推导出了时变频率选择性信道下OFDM系统容量表达式，然后分析了子载波间隔对OFDM系统频谱效率的影响，提出了子载波间隔自适应以最大化频谱效率的方法，仿真结果证明此类自适应技术能大幅提高OFDM系统的频谱效率。

关键词: OFDM, 频谱效率, 子载波间隔, 自适应

Abstract:

The development of wireless communications technology OFDM demands higher and higher spectrum efficiency. The spacing of sub-carrier bandwidth is key factors that infect the spectrum efficiency.This paper deducted the OFDM capacity in the time-varying spectrum selective channe1，analyzed the influence of sub-carrier spacing to spectrum efficiency，and proposed the method of adaptive sub-carrier spacing to maximum spectrum efficiency. Simulation proved that adaptive technology can prompt spectrum efficiency greatly.

Key words: OFDM, spectrum efficiency, sub-carrier spacing, adaptive

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