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AssigneeResearch & Business Foundation Sungkyunkwan University
InventorsYoungpo Lee, Seokho Yoon
Estimating the term…
The present invention provides an apparatus and method for estimating a frequency offset which are robust against non-Gaussian noise. In a frequency offset estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system using a training symbol, the method includes receiving a reception signal, setting a specific initial frequency offset corresponding to the reception signal, and calculating a log-likelihood function based on a Complex Isotropic Symmetric α Stable (CISαS) probability density function obtained by modeling non-Gaussian noise included in the reception signal and estimating an optimum frequency offset based on the log-likelihood function and the initial frequency offset through a Maximum Likelihood Estimator (MLE). Accordingly, in a non-Gaussian noise environment, frequency offset estimated performance can be improved as compared with a conventional method in which noise is assumed to be a normal distribution.
A frequency offset estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system performed by a communication signal receiver, comprising:
A frequency offset estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system performed by a communication signal receiver, comprising:
A frequency offset estimation apparatus of an Orthogonal Frequency Division Multiplexing (OFDM) system comprising:
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