面向差分调制解调的编码码率研究  

On the coding rate for differential modulation and detections

作　　者：徐亚冲[1] 胡东伟[1] XU Ya-chong HU Dong-wei(The 54th Research Institute of CETC, Shijiazhuang 050081, China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《网络与信息安全学报》2016年第7期42-48,共7页Chinese Journal of Network and Information Security

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。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 detections neither be too high, nor be too low. To find the optimal coding rate, the Shannon limit of error free transmissions 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.

关 键 词：差分调制解调 编码码率 卷积编码 TURBO编码 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]