首页 | 官方网站   微博 | 高级检索  
     

基于PN序列的MIMO-OFDM系统信道估计
引用本文:陆震,葛建华,王勇.基于PN序列的MIMO-OFDM系统信道估计[J].华中科技大学学报(自然科学版),2007,35(4):44-47.
作者姓名:陆震  葛建华  王勇
作者单位:1. 上海交通大学,电子信息与电气工程学院,上海,200240
2. 上海交通大学,电子信息与电气工程学院,上海,200240;西安电子科技大学,ISN国家重点实验室,陕西,西安,710071
3. 西安电子科技大学,ISN国家重点实验室,陕西,西安,710071
摘    要:基于为MIMO-OFDM系统设计了一种训练序列,并给出了相应的信道估计算法.提出使用PN序列代替传统OFDM系统中的循环前缀作为训练序列,并且不同发射天线选择相互正交的PN序列,利用PN序列的自相关性和互相关性,采用时域相关的方法估计多信道.与传统采用频域导频的信道估计器相比,该方法由于无需矩阵求逆,能够大大降低计算复杂度,同时PN序列作为OFDM符号的一部分可以实时估计信道,具有跟踪时变信道的能力.仿真结果表明该估计是无偏的,而且均方估计误差极小.

关 键 词:多输入多输出-正交频分复用  信道估计  训练序列  PN序列  序列  系统  信道估计器  systems  估计误差  均方  仿真结果  能力  时变信道  跟踪  实时估计  符号  计算复杂度  矩阵求逆  频域导频  多信道  方法  时域相关  互相关性  利用
文章编号:1671-4512(2007)04-0044-04
修稿时间:02 20 2006 12:00AM

PN sequences-based channel estimation for MIMO-OFDM systems
Lu Zhen,Ge Jianhua,Wang Yong.PN sequences-based channel estimation for MIMO-OFDM systems[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2007,35(4):44-47.
Authors:Lu Zhen  Ge Jianhua  Wang Yong
Abstract:A new training sequence is designed for MIMO-OFDM systems,and the corresponding channel estimation algorithm is proposed.The method uses PN sequence as training sequence instead of cyclic prefix,and the PN sequences are orthogonal at different transmit antennas.Due to the autocorrelation and cross-correlation of PN sequences,the channel estimation was acquried by correlation in the time-domain.Compare to traditional estimators that used pilots in the frequency-domain,the proposed estimator need not matrix inversion that can reduce computational complexly.Because PN sequence is a part of OFDM symbol,the channels can be real-time estimated and time varying channels can be tracked.The computer simulation results show that the proposed estimator is unbiased and has significantly smaller MSE.
Keywords:multiple-input multiple-output orthogonal frequency-division multiplexing(MIMO-OFDM)  channel estimation  training sequence  PN sequence
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号