一种提高TDD系统在快衰落信道中性能的新型时隙结构  

A Novel Time Slot for Combating Fast Fading in TDD Systems

作　　者：雷鸣[1] 徐月善[1] 刘宝玲[1] 张平[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《北京邮电大学学报》2003年第4期94-98,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"863计划""新一代蜂窝移动通信系统无线传输链路技术"项目资助(2001AA123016)

摘　　要：针对TDD(timedivisionduplex)系统提出了一种新型的时隙结构,该时隙由前置导频、数据、后置导频和保护时间4个部分构成.基于这种时隙结构,信道估计的高阶插值可以在一个TDD时隙内完成,从而克服了基于插值的信道估计方法在TDD系统中实现困难的问题.基于新型时隙结构的TDD系统可以采用高阶插值来克服信道快衰落,从而获得性能的改善.In this paper, we put forward a novel time slot structure, which is made up of four parts: pre-pilot, data, post-pilot and guard time. Based on this novel time slot structure, the interpolation of channel estimation can be achieved within every TDD time slot. The simulation results show that BER performance can be improved significantly when the system experiences fast fading.

关 键 词：无线通信 TDD系统 时分双工 快衰落信道 时隙结构 信道估计 插值 

分 类 号：TN92[电子电信—通信与信息系统]