多中继无线协作网络基于双块导频的信道估计  

Channel estimation method based on double-block pilots-assisted for multi-relay wireless cooperative networks

作　　者：刘亚楠[1] 王丹 杨松领 李丹丹[1] 

机构地区：[1]河南科技大学信息工程学院,河南洛阳471023

出　　处：《电视技术》2016年第7期94-98,共5页Video Engineering

基　　金：国家自然科学基金项目(61101167);河南科技大学博士科研启动基金项目(09001409);河南科技大学"青年学术技术带头人"项目(2014);河南省科技攻关计划项目(112102210431);河南省基础与前沿技术研究计划项目(142300410343);大学生研究训练计划(SRTP)项目(2015039)

摘　　要：在频率选择性衰落信道下的AF多中继无线协作网络中,由于传统的信道估计方法只能估计级联信道的CSI,结合单载波频域均衡技术,提出了一种基于双块导频的分段式频域信道估计方法。双块导频分别由源节点和中继节点做短序列重复变换移位(Short Sequence Repeat Transformation Shift,SSRTS)处理得到,在目的节点结合最小二乘和加窗(Least Squares Windowing,LSW)算法估计出S-R-D信道和R-D信道的CSI,再计算得到S-R信道的CSI。仿真结果表明,该方法可以有效地估计分段信道,提高了信道估计精度,减少了信道训练时隙。The traditional channel estimation methods can only estimate the Channel State Information （CSI） of cascade channels for Amplify-and-Forward（AF） multi-relay wireless cooperative networks over frequency-selective fading channel. A double-block pilots-assisted disintegrated frequency domain channel estimation method is proposed combining with the Single Carrier Frequency Domain Equalization（SC-FDE） technology. The double-block pilots obtained from making a Short Sequence Repeat Transforma- tion Shift （SSRTS） process both in the source and the relay nodes, respectively. This method estimates the CSI of the S-R-D and R-D channels through combining Least Squares and Windowing（LSW） algorithms in the destination node, and calculates the CSI of S-R channels. The simulation results show that this method can effectively estimate the channels of the two section link, with high accuracy and less channel estimation time.

关 键 词：多中继 协作通信 单载波频域均衡 双块导频 信道估计 

分 类 号：TN925[电子电信—通信与信息系统]