网络与信息安全学报 ›› 2016, Vol. 2 ›› Issue (7): 42-48.doi: 10.11959/j.issn.2096-109x.2016.00072

• 学术论文 • 上一篇    下一篇

面向差分调制解调的编码码率研究

徐亚冲(),胡东伟   

  1. 中国电子科技集团公司第五十四研究所,河北 石家庄 050081
  • 修回日期:2016-07-02 出版日期:2016-07-15 发布日期:2020-03-26
  • 作者简介:徐亚冲(1984-),男,山东肥城人,硕士,中国电子科技集团公司第五十四研究所工程师,主要研究方向为无线通信、卫星通信。|胡东伟(1980-),男,湖北麻城人,博士,中国电子科技集团公司第五十四研究所高级工程师,主要研究方向为无线通信理论、集成电路设计。

On the coding rate for differential modulation and detections

Ya-chong XU(),Dong-wei HU   

  1. The 54th Research Institute of CETC,Shijiazhuang 050081,China
  • Revised:2016-07-02 Online:2016-07-15 Published:2020-03-26

摘要:

差分调制解调是解决无线通信高动态条件下信息传输的一种重要方法。针对面向差分调制解调的编码码率既不宜过高,也不宜过低的问题,从信息论的角度,分别针对差分BPSK调制和差分QPSK调制,分析了各种不同码率下无差错传输的香农限,得出了最佳的编码码率。通过采用不同码率的卷积编码和 Turbo编码,实验仿真验证了所得理论的正确性。

关键词: 差分调制解调, 编码码率, 卷积编码, Turbo编码

Abstract:

Differential demodulation is an important method of solving the information transmission which is used in the high dynamic condition of the wireless communication.The coding rate for differential modulation and detec-tions neither be too high,nor be too low.To find the optimal coding rate,the Shannon limit of error free transmis-sions with different rates for differential BPSK and differential QPSK were derived.Thereafter,the optimal coding rate was obtained from the view point of information theory.Convolutional codes and Turbo codes with different rates were employed,and simulations were conducted for the verification of the result.

Key words: differential demodulation, coding rate, convolutional code, Turbo code

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