NDLI: Enhanced DFT Interpolation-based Channel Estimation for OFDM Systems with Virtual Subcarriers

Content Provider	IEEE Xplore Digital Library
Author	Dong Li Feng Guo Guosong Li Liyu Cai
Copyright Year	2006
Description	Author affiliation: R&I Center, Alcatel Shanghai Bell Co. Ltd. (Dong Li; Feng Guo; Guosong Li; Liyu Cai)
Abstract	In practical OFDM systems, some virtual subcarriers are reserved for easing the requirements on the filter. In this case, the channel impulse response (CIR) estimated by DFT approaches appears a spectral leakage, which results in an error floor for the MSE performance. This paper proposes two enhanced DFT interpolation-based channel estimation methods, termed as EDFTI-CE-A and EDFTI-CE-B, based on the robust Wiener filtering, which can eliminate most of the leakage effect owning to the absence of pilot symbols in the virtual subcarriers and further suppress the effect of additive noise. The analysis and simulation results show that the proposed EDFTI-CE-A can almost eliminate the MSE floor of conventional DFTI-CE with small complexity increase and the proposed EDFTI-CE-B can achieve the same performance as linear MMSE channel estimator but with much lower computational complexity
Starting Page	1580
Ending Page	1584
File Size	2456386
Page Count	5
File Format	PDF
ISBN	0780393910
ISSN	15502252
DOI	10.1109/VETECS.2006.1683112
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-07
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation OFDM Discrete Fourier transforms Interpolation Frequency estimation Frequency domain analysis Wiener filter Wireless LAN Digital video broadcasting Costs interpolation channel estimation virtual subcarriers DFT
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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