An Improved Integer Frequency Offset Estimation in OFDM Systems Using Maximum Likelihood Function 


Vol. 31,  No. 2, pp. 103-109, Feb.  2006


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  Abstract

OFDM system has a disadvantage of sensitiveness about the effect of the frequency offset caused by the discord of oscillators in transmitter and receiver. The frequency offset can be divided into integral part and decimal part. Although the frequency offset of integral part do not effect orthogonality between subcarriers, it makes the bit error probability become to 0.5 because of circular transient among transmitted data symbols. This paper proposes a new estimation scheme of the frequency offset of integral part by Maximum Likelihood (ML) demanding only one training symbol in multipath fading channel environment. This proposed scheme not only can reduce the number of training symbol but do not increase the complexity and it shows the better performance by simulation.

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  Cite this article

[IEEE Style]

D. W. Nam, D. Yoon, S. K. Park, "An Improved Integer Frequency Offset Estimation in OFDM Systems Using Maximum Likelihood Function," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 2, pp. 103-109, 2006. DOI: .

[ACM Style]

Do Won Nam, Dongweon Yoon, and Sang Kyu Park. 2006. An Improved Integer Frequency Offset Estimation in OFDM Systems Using Maximum Likelihood Function. The Journal of Korean Institute of Communications and Information Sciences, 31, 2, (2006), 103-109. DOI: .

[KICS Style]

Do Won Nam, Dongweon Yoon, Sang Kyu Park, "An Improved Integer Frequency Offset Estimation in OFDM Systems Using Maximum Likelihood Function," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 2, pp. 103-109, 2. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880