基于正交频分复用的超正交空时网格码  

Super-orthogonal space-time trellis code based on orthogonal frequency division multiplexing

作　　者：邵朝[1] 李国彬[1] 周谋[2] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]重庆科技学院电气与信息工程学院,重庆401331

出　　处：《西安邮电大学学报》2017年第3期1-5,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金重点资助项目(61136002);陕西省自然科学基金资助项目(2014JM8331;2014JQ5183;2014JM8307);陕西省教育厅科学研究计划资助项目(2015JK1654)

摘　　要：为提高超正交空时网格码在多径衰落信道中的传输性能,引入正交频分复用技术对其加以改进。借助编码矩阵和最佳分区对输入序列进行超正交空时网格编码,之后进行串并转换得到输出符号;将输出符号进行离散傅里叶变换,完成发射端调制;在接收端,对各子载波先分离,再进行独立的维特比译码。数值仿真结果显示,相对于超正交空时网格码,当信噪比相同时,改进后的编码误比特率更优,译码复杂度更低。In order to improve the transmission performance of super orthogonal space-time trellis codes （SOSTTC） in multipath fading channels, orthogonal frequency division multiplexing （OFDM） is introduced into the wireless communication systems. By means of the coding matrix and the optimal partition, the super orthogonal space-time trellis coding is performed on the input sequence, and then, the string is deserialized to output symbols. Whereafter, the discrete Fourier transform is applied on these output symbols to complete the transmitter modulation. At the receiver, the sub carriers are separated first, and then the independent Viterbi decoding is performed. Numerical simulation results show that, as OFDM is introduced into SOSTTC, when the signal to noise ratio is the same, the bit error rate is better and the decoding complexity is lower.

关 键 词：超正交空时网格码 正交频分复用技术 编码矩阵 最佳分区 维特比译码 

分 类 号：TN914.1[电子电信—通信与信息系统]