DT-OFDM在Ka频段卫星通信中的应用  

Application of DT-OFDM for Satellite Communications in Ka Band

作　　者：李云云[1] 达新宇[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《上海航天》2006年第1期57-60,共4页Aerospace Shanghai

基　　金：武器装备预先研究基金项目(51421010103jb3202)

摘　　要：为提高Ka频段卫星通信的性能,采用信道编码技术提出了一种差分Turbo码正交频分复用(DT-OFDM)方案,给出了DT-OFDM系统模型的组成和差分软检测方法。仿真试验结果表明,不同子载波数的DT-OFDM误码率均低于传统的卷积编码正交频分复用(CC-OFDM)和网格编码正交频分复用(TCM-OFDM)。To improve the performance for satellite communication in Ka band, a scheme of differential Turbo coded orthogonal frequency division multiplexing （DT-OFDM） was put forward using technology of channel coding in this paper. The composition of DT-OFDM system model and method of differential soft detection were also given. The simulation results showed that the bit error rate of DT-OFDM within various sub-carrier numbers were better than convolutional coded orthogonal frequency division multiplexing （CC-OFDM） and Turbo coding modulation orthogonal frequency division multiplexing （DT-OFDM）.

关 键 词：卫星通信 KA频段 TURBO码 正交频分复用 

分 类 号：TN927.2[电子电信—通信与信息系统]