NDLI: A novel OFDM receiver in the flat-fading channel

Content Provider	IEEE Xplore Digital Library
Author	Zhangyong Ma Young-il Kim
Copyright Year	2005
Description	Author affiliation: Portable Internet Syst. Res. Team, Electron. & Telecommun. Res. Inst., Daejeon (Zhangyong Ma; Young-il Kim)
Abstract	Coherent orthogonal frequency division multiple access (OFDM) systems are highly sensitive to the carrier frequency offset (CFO) and the channel estimation errors. In this paper, we develop a novel scheme for joint carrier frequency offset and channel estimation in a Rayleigh flat-fading channel. Unlike existing alternatives, the proposed CFO estimators relying on second-order statistics of OFDM signals don't require the transmission of known sequences. A simple time-domain weighted algorithm based channel estimation with pilot-data multiplexed scheme is investigated. The only necessary assumption for CFO correction is the use of different powers for different subcarrier transmitter (weighted subcarrier, WSC). The simulation results show that the proposed methods achieve more accurate estimation of the CFO and the time-variant channel parameter than the conventional schemes, and the system performance is improved dramatically
Sponsorship	IEEE Comm. Soc. (IEEE ComSoc) IEEE Region 10 and IEEE Daejeon Sect. Open Stand. and Internet Assoc. (OSIA) Korean Inst. of Comm. Sci. (KICS) Korea Info-comm. infrastructure Forum (KIF) IEEK Comm. Soc. (IEEK ComSoc)
Starting Page	1052
Ending Page	1054
File Size	477616
Page Count	3
File Format	PDF
DOI	10.1109/ICACT.2005.246139
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-02-21
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	National Computerization Agency
Subject Keyword	Channel estimation Transmitters Frequency estimation Frequency conversion OFDM modulation Baseband Discrete Fourier transforms Oscillators Internet Statistics
Content Type	Text
Resource Type	Article

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