NDLI: Blind adaptive scheme for joint frequency offset and channel estimation in OFDM systems

Content Provider	IEEE Xplore Digital Library
Author	Tangdi Zhang Caixiang Wang Xiaowen Li
Copyright Year	2010
Description	Author affiliation: School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing, China (Tangdi Zhang; Caixiang Wang; Xiaowen Li)
Abstract	OFDM systems are very sensitive to frequency offset. This frequency offset results in inter-carrier interference (ICI) and, as a result, the performance of the OFDM system degrades drastically. In this paper, a blind adaptive method for joint frequency offset and channel estimation is proposed to reduce ICI effects and estimate frequency offset and channel. Adaptive technique is used to suppress these ICI effects. The channel impulse response (CIR) affected by frequency offset is tracked by a channel tracker in frequency domain. The result of the tracker is used to estimate the frequency offset and the channel. Then the frequency offset estimate is feedback to compensate the receipt signal. A blind estimation method is used, in consequence the efficiency and security of system are not reduced. The simulated results show that this scheme can reduce ICI effects significantly and the frequency and channel can be estimated effectually.
File Size	427228
File Format	PDF
ISBN	9781424468928
e-ISBN	9781424468935
DOI	10.1109/ICSPS.2010.5555700
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-05
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	carrier frequency offset (CFO) estimation channel estimation orthogonal frequency division multiplexing OFDM Channel estimation Estimation Adaptive filters Frequency estimation Mathematical model Equations intercarrier interference
Content Type	Text
Resource Type	Article

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