NDLI: Low-complexity blind carrier frequency recovery for OFDM signals over frequency-selective radio channels

Content Provider	IEEE Xplore Digital Library
Author	Luise, M. Marselli, M. Reggiannini, R.
Copyright Year	1972
Abstract	This paper introduces a blind (i.e., data independent) algorithm for carrier frequency offset recovery in an orthogonal frequency-division multiplexing (OFDM) receiver operating over frequency-selective fading channels. The main idea behind this algorithm is to exploit the time-frequency-domain exchange inherent to the modulation scheme. Due to this feature, a carrier frequency offset has a similar impact on OFDM as a clock timing offset has in a quadrature amplitude modulation (QAM) system. The scheme we propose is a variant of Oerder-Meyr's (1988) feedforward clock recovery. Its performance is assessed by simulation, and the results are compared to those obtained from Van de Beek-Sandell-Borjesson's (1997) frequency synchronizer, which bears comparable complexity. The new scheme is shown to outperform the latter over frequency-selective fading channels, notably at medium to high signal-to-noise ratios. We also evaluated the efficiency of two different (time domain and frequency domain) offset correction strategies embedded in a particular OFDM receiver.
Starting Page	1182
Ending Page	1188
Page Count	7
File Size	304745
File Format	PDF
ISSN	00906778
Volume Number	50
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	RF signals Frequency-selective fading channels Clocks Quadrature amplitude modulation Frequency division multiplexing Receivers OFDM modulation Timing Frequency synchronization Signal to noise ratio
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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