北京邮电大学学报

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北京邮电大学学报

• 学术论文 • 上一篇    

一种二维的自适应调制编码技术

    

  1. 北京邮电大学 电信工程学院 , 北京 100876
  • 基金资助:
    国家“ 863计划”资助项目 ( 2001AA123054) 

A Novel Technology on 2-Dimension Adaptive Modulation Coding 

    

  1. Telecommunication Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Supported by:
     

摘要: 提出了一种新的 AMC概念—— 二维AMC. 将信道信噪比信息和波动信息同时作为信道调 制编码方式的决定因素 ,同时给出了此方案与现有的 AMC方案频谱利用率的仿真结果比较 .尤其 适用于有频率选择性衰落的 OFDM系统或者有时间选择性衰落的单载波系统中高速数据传输的 情形 . 

关键词: 自适应调制编码, 衰落 , 信道波动

Abstract:

In a system with AMC ( adaptive modulation/coding) , the result of the decoder (erroneous or coorrect) is not only dependent on the signal to noise ratio in the block, the channel variation among the symbols of that block have also much impact on the decoder. This inspired us to propose a new concept of 2dimension AMC . With this 2D-AMC, the modulation/coding selection is determined both by the signal noise ratio and the standard deviation of the channel variation. Significant throughput improvement by 2D AMC over 1D-AMC was observed in our simulations. The 2D AMC is suitable for the case where the channel for one code block is not flat such as O FDM with multi-path environment. In addition, the 2D-AMC is completely compatible with 1D-AMC.

Key words: adaptive modulation/coding, fading, channel fluctuation

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