快衰落信道下改进的STBC解码性能分析  

Performance Analysis of Improved STBC Decoder in Fast Fading Channels

作　　者：杨柳[1] 刘汉奎[1] 郝希准[1] 李骏[1] 

机构地区：[1]西华师范大学物理与电子信息学院,四川南充637002

出　　处：《计算机仿真》2011年第1期155-157,共3页Computer Simulation

基　　金：四川省教育厅重点实验室专项基金资助项目(2006ZD026)

摘　　要：研究无线移动通信优化问题,在分析传统空时分组码(STBC)的解码原理的基础上,针对其在快衰落信道下存在码间干扰问题,从解码方式上进行研究达到解决快衰落信道下受到的码间干扰问题。提出了一种适合快衰落信道环境下改进的STBC线性解码方法可以成功消除了传统STBC存在的码间干扰。通过仿真看出,与采用传统STBC相比,采用新方法的系统性能得到改善。随着多普勒频移和信噪比的增大,系统性能的改善易实现。仿真表明方法的有效性,并有效地消除了码间干扰。In order to deal with fast fading channel intersymbol interference, based on the analysis of the tradition- al space-time block coding （STBC） and researched in the decoding way to solve fast fading channel intersymbol in- terference problem, a new linear STBC method applied to the fast fading channel environment is derived. This method can overcome the intersymbol interference which exists in the traditional STBC. The simulations show that the new STBC method can improve the system performance compared with the traditional STBC. This improvement will be- come obvious with the increasing of Doppler frequency shift and SNR. The simulations indicate the validity of the method . The algorithm of the new STBC method is simple, and easy to implement.

关 键 词：快衰落信道 多输入多输出 空时分组码 信道估计 多普勒频移 

分 类 号：TN919[电子电信—通信与信息系统]