详细信息
基于隐含ZCZ训练序列的MIMO信道估计性能改进 ( EI收录)
Enhanced Performance for MIMO Channel Estimation Based on Implicit ZCZ Training Sequences
文献类型:期刊文献
中文题名:基于隐含ZCZ训练序列的MIMO信道估计性能改进
英文题名:Enhanced Performance for MIMO Channel Estimation Based on Implicit ZCZ Training Sequences
作者:袁伟娜[1,2];王平[2];范平志[2]
机构:[1]华东理工大学信息科学与工程学院,上海200237;[2]西南交通大学信息编码与传输四川省重点实验室,四川成都610031
年份:2010
卷号:38
期号:1
起止页码:74
中文期刊名:电子学报
外文期刊名:Acta Electronica Sinica
收录:CSTPCD;;EI(收录号:20101212786527);Scopus;北大核心:【北大核心2008】;CSCD:【CSCD2011_2012】;
基金:国家自然科学基金(No.60772087;60902023;60975004;50803016);国家863高技术研究发展计划(No.2007AA01Z228);西南交通大学信息编码与传输四川省重点实验室开放研究基金
语种:中文
中文关键词:MIMO;多径信道;ZCZ;隐含训练序列
外文关键词:multiple-input multiple-output(MIMO) multi-path channels zero correlation zone(ZCZ) implicit training
摘要:本文研究了采用隐含训练序列无直流偏移影响的MIMO频率选择性信道的估计问题.通过选用具有平衡特性的二进制ZCZ序列作为训练序列,可以在不增加任何复杂度的情况下直接消除直流偏移量的影响.由于每根天线的发射数据经过预处理后再算术叠加到训练序列上,从而消除了传统隐含估计方法中未知数据对信道估计性能的影响.本文推导了采用新方法的MIMO信道估计误差方差表达式,并从时域的角度给出了分析.理论分析和仿真结果表明,本文方法性能优于已有的隐含信道估计方法.
This paper addresses the problem of multiple-input multiple-output(MIMO) frequency selective channel estimation using implicit training without dc-offset(direct current).In order to remove the dc-offset directly without introducing extra complexity,the ZCZ(Zero correlation zone) set with balance properties can be used as training sequences.Since the transmitted data from each antenna is first pre-processed and then arithmetically added onto the training sequences,thus the influence of the unknown data to the channel estimation existed in normal implicit method can be cancelled.In this paper,error variance of channel estimation vector is derived,and time-domain analysis is performed.Our theoretical analysis and simulation results validate the superiority of the new method compared with the conventional implicit estimation method.
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