NDLI: A Simplified NLS Frequency Offset Estimator for OFDM Systems

Content Provider	IEEE Xplore Digital Library
Author	Yun Wu Wen Chen Wu-Jun Xu
Copyright Year	2009
Abstract	A simplified nonlinear least square (NLS) carrier frequency offset (CFO) estimation scheme is proposed based on an OFDM training symbol with L identical parts. Since the NLS CFO estimate scheme has no close-solution, the estimate process is divided into two steps of fine and coarse estimations. The fine estimation is obtained by the correlation of two identical halves in the training symbol. After compensating the fine estimation, the coarse estimation is easily obtained based on NLS by searching the peak on the L-point frequency grids.Moreover, to reduce the computational complexity of coarse CFO estimation, a strategy of adaptive adjusting the number of used sub-symbols based on estimate reliability evaluation is devised. Computer simulations demonstrate that the proposed CFO estimator has a satisfying estimate performance, while maintaining a low computer complexity.
Starting Page	181
Ending Page	185
File Size	375537
Page Count	5
File Format	PDF
ISBN	9780769535074
DOI	10.1109/CSIE.2009.451
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Computer simulation Delay estimation Educational institutions Frequency estimation Least squares approximation Computational complexity Computer science identical parts Information science Intersymbol interference nonlinear least square frequency offset estimation
Content Type	Text
Resource Type	Article

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