Integer Frequency Offset Estimation Scheme Robust to Timing Offset for OFDM-Based CR Systems 


Vol. 35,  No. 6, pp. 554-561, Jun.  2010


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  Abstract

This paper proposes an integer frequency offset estimation scheme robust to timing offset for the orthogonal frequency division multiplexing (OFDM)-based cognitive radio (CR) systems. The proposed scheme exploits a feature that a sample distance between a continual pilot and a scattered pilot nearest to it in an OFDM symbol belongs to one of predetermined distances. First after calculating a correlation value of every continual pilot and its nearest scattered pilot. Then, it is divided into several groups according to the sample distances. Since correlation values with the same sample distance undergo the same effect of the timing offset, the effect of the timing offset can be removed by re-correlating these correlation values. From the simulation results we can confirm that the proposed algorithm estimates the integer frequency offset with the robustness to the timing offset when compared to a conventional scheme.

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  Cite this article

[IEEE Style]

Y. Lee, C. Song, S. Yoon, "Integer Frequency Offset Estimation Scheme Robust to Timing Offset for OFDM-Based CR Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 6, pp. 554-561, 2010. DOI: .

[ACM Style]

Youngyoon Lee, Chonghan Song, and Seokho Yoon. 2010. Integer Frequency Offset Estimation Scheme Robust to Timing Offset for OFDM-Based CR Systems. The Journal of Korean Institute of Communications and Information Sciences, 35, 6, (2010), 554-561. DOI: .

[KICS Style]

Youngyoon Lee, Chonghan Song, Seokho Yoon, "Integer Frequency Offset Estimation Scheme Robust to Timing Offset for OFDM-Based CR Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 35, no. 6, pp. 554-561, 6. 2010.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880