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An OFDM Frequency Offset Estimation Scheme Robust to Timing Error  

Kim Sang-Hun (성균관대학교 정보통신공학부)
Yoon Seok-Ho (성균관대학교 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.6C, 2006 , pp. 623-628 More about this Journal
Abstract
This paper addresses the frequency offset estimation problem in the presence of the timing error for OFDM systems. When the timing error exists, the correlation value used for the frequency offset estimation could be reduced significantly due to the timing error, resulting in considerable degradation in estimation performance. In this paper, using the coherence phase bandwidth (CPB) and a threshold, a novel frequency offset estimation scheme is proposed and based on which, an efficient timing error estimation scheme is also proposed for the re-estimation of the frequency offset. The performance comparison results show that the proposed frequency offset estimation scheme is not only more robust to the timing error but also has less computational complexity, as compared with the conventional schemes. It is also demonstrated by simulation that theproposed timing error estimation scheme gives a reliable estimate of the timing error.
Keywords
OFDM; threshold; frequency offset; timing error; estimation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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