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A Low Complexity Frequency Offset Estimation Scheme for OFDM Systems  

Lee, Young-Yoon (성균관대학교 정보통신공학부)
Chong, Da-Hae (성균관대학교 정보통신공학부)
Yoon, Tae-Ung (성균관대학교 정보통신공학부)
Song, Chong-Han (성균관대학교 정보통신공학부)
Kim, Sang-Hun (성균관대학교 정보통신공학부)
Park, So-Ryoung (가톨릭대학교 정보통신전자공학부)
Yoon, Seok-Ho (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.5C, 2009 , pp. 548-554 More about this Journal
Abstract
OFDM systems are very sensitive to the frequency offset. Therefore, frequency offset estimation is one of the most important procedures in OFDM systems. Ren's periodogram-based frequency offset estimation scheme consists of three steps which estimates the frequency offset accurately. However, there are the drawbacks of the limited frequency offset estimation ranges in the second and third estimation steps of the Ren's scheme. This ranges are insufficient compared with the overall signal bandwidth, making the high complexity of the first estimation step. In this paper, we propose a novel lower complexity frequency offset estimation scheme for OFDM systems which extends the frequency offset estimation range. The simulation results show that the proposed scheme has a wider frequency offset estimation range and lower complexity than those of the Ren's scheme.
Keywords
OFDM; low complexity; frequency offset; estimation;
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