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PIMRC
2010
IEEE

Fast varying channel estimation in downlink LTE systems

13 years 1 months ago
Fast varying channel estimation in downlink LTE systems
This paper tackles the problem of fast varying channel estimation in LTE systems. Particular attention is given to downlink transmission where OFDMA is used as the multiple access technique for the air interface. In OFDMA, fast variation of the channel results in significant inter-carrier interference (ICI) which cannot be mitigated with conventional estimation and equalization techniques. In this paper, we investigate the polynomial modeling of rapidly time varying channels. Specifically, we propose a time-domain estimation method and a low-complexity frequency-domain estimation method both of which leverage the special structure of the approximated channel matrix to compute ICI channel components. It is shown by simulations that these two methods provide a considerable performance improvement over conventional methods by means of improved ICI mitigation. We further study the robustness of these two methods to both partial and full channel profile knowledge. It has been shown that the...
Youssef El Hajj Shehadeh, Serdar Sezginer
Added 14 Feb 2011
Updated 14 Feb 2011
Type Journal
Year 2010
Where PIMRC
Authors Youssef El Hajj Shehadeh, Serdar Sezginer
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