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A Novel OFDM frequency Offset Estimation Algorithm Using a Periodogram  

Ahn, Sang-Ho (성균관대학교 정보통신공학부)
Song, Chong-Han (성균관대학교 정보통신공학부)
Lee, Myung-Soo (성균관대학교 정보통신공학부)
Lee, Seong-Ro (목포대학교 정보공학부)
Jung, Min-A (목포대학교 정보공학부)
Choi, Myeong-Soo (목포대학교 정보공학부)
Lee, Jin-Seok (정보통신연구진흥원)
Yoon, Seok-Ho (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.2C, 2009 , pp. 226-233 More about this Journal
Abstract
A novel frequency offset estimation scheme using a periodogram is proposed for orthogonal frequency division multiplexing (OfDM) systems. A conventional scheme proposed by Ren has a problem that the fractional and residual frequency offset estimation steps do not compensate for the difference between the real frequency offset and estimated integer frequency offset in the noise channel. So, the frequency offset estimation performance of Ren's scheme is degraded. In this paper, a frequency offset estimation scheme is proposed, which has a larger estimation range than that of the factional and residual frequency offset estimation steps in Ren's scheme. The proposed scheme can compensate for the difference between the real frequency offset and estimated integer frequency offset, unlike Ren's scheme. From the simulation results, we can observe that the performance of the proposed scheme is better than that of Ren's scheme.
Keywords
Orthogonal frequency division multiplexing (OFDM); Periodogram; Frequency offset; Estimation;
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  • Reference
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