全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
电子学报  2007 

MIMO系统中级联训练序列的频偏估计性能分析

, PP. 152-156

Keywords: MIMO,频偏估计,训练序列,克拉美罗下界

Full-Text   Cite this paper   Add to My Lib

Abstract:

在MIMO频率选择性衰落信道下,使用级联训练序列是解决频偏估计中相位模糊问题的方法之一.级联训练序列由若干个短序列和若干个长序列组成.短序列是为了获得更大的估计范围而长序列是为了获得更高的估计精度.本文利用克拉美罗下界(Cramer-RaoLowerBound,CRLB)作为衡量标准分析了级联训练序列的频偏估计性能,推导了级联训练序列的均方误差公式,得到了级联训练序列的性能渐进等于长序列的估计性能,并且证明了事实上最优的级联训练序列结构并不是目前广泛采用的级联结构,而是将整个序列全部分割成短序列.最后通过仿真验证了理论分析的结果.

References

[1]  U Tureli,H Liu,M Zoltowski.OFDM blind carrier offset estimation:ESPRIT[J].IEEE Transactions on Communications,2002,48(9):1459-1461.
[2]  张贤达.现代信号处理(第二版)[M].北京:清华大学出版社,2002.
[3]  H Minn,P Tarasak.Improved maximum likelihood frequency offset estimation based on likelihood metric design[J].IEEE Transactions on Signal Processing,2006,54(6):2076-2086.
[4]  C Chen,J Li.Maximum likelihood method for integer frequency offset estimation of OFDM systems[J].Electronic Letters,2004,40(13):813-814.
[5]  Z Lu,J Li,L Zhao,L.Chen.Design of the periodic training sequence for joint channel and frequency estimation in MIMO frequency-selective channels[J].Circuits Systems and Signal Processing,2007,26(3):379-392.
[6]  M Dong,L.Tong.Optimal design and placement of pilot symbols for channel estimation[J].IEEE Transactions on Signal Processing,2002,50(12):3055-3069.
[7]  X Ma,G B Giannakis,S Ohno,Optimal training for block transmissions over doubly selective wireless fading channels[J].IEEE Transactions on Signal Processing,2003,51(5):1351-1365.
[8]  J C L Ng,K B Letaief,R D Murch,Complex optimal sequences with constant magnitude for fast channel estimation initialization[J].IEEE Transactions on Communications,1998,46(3):305-308.
[9]  H Liu,U Tureli.A high-efficiency carrier estimator for OFDM communications[J].IEEE Communication Letters,1998,2(4):104-106.
[10]  M Morelli,U Mengali.Carrier-frequency estimation for spacediversity reception over selective channels[J].IEE Proceedings Communications,2002,149(2):58-64.
[11]  H Minn,S Xing,V K Bhargava.Optimal periodic training signal for frequency offset estimation in frequency-selective fading channels[J].IEEE Transactions on Communications,2006,54(6):1081-1096.
[12]  H Minn,S Xing.An optimal training signal structure for frequency-offset estimation[J].IEEE Transactions on Communications,2005,53(2):343-355.
[13]  T M Schmidl,D C Cox.Robust frequency and timing synchronization for OFDM[J].IEEE Transactions on Communications,1997,45(12):1613-1621.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133