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Pilot-Aided Iterative Frequency Offset Estimation for Digital Video Broadcasting Systems  

Lee, Kyung-Taek (전자부품연구원 DxB.통신융합연구센터, 연세대학교 대학원 전기공학과)
Seo, Jong-Soo (연세대학교 전기전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.5A, 2007 , pp. 484-489 More about this Journal
Abstract
The main disadvantage of orthogonal frequency division multiplexing (OFDM) systems is its sensitivity to carrier frequency offset and timing offset. This paper proposes a simple way of improving the performance of the integer frequency offset (IFO) estimator in OFDM-based digital video broadcasting (DVB) system. By modifying the conventional maximum likelihood (ML) estimator to have multi-stage estimation strategy, IFO estimator is derived. Simulations indicate that the proposed IFO estimator works robustly with reduced computational burden when compared to ML estimator.
Keywords
OFDM; Digital Video Broadcasting(DVB); Synchronization; frequency offset; maximum likelihood(ML);
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