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An Efficient symbol Synchronization Scheme with an Interpolator for Receiving in OFDM  

김동옥 (한국항공대학교 항공통신정보공학과)
윤종호 (한국항공대학교 항공통신정보공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.6, no.4, 2002 , pp. 567-573 More about this Journal
Abstract
In this paper, we propose a new symbol time synchronization scheme suitable for the OFDM system with an interpolator. The proposed scheme performs the following three steps. In the first step, the coarse symbol time synchronization is achieved by continuously measuring the average power of the received envelope signal. Based on this average power, the detection possibility for the symbol time synchronization is determined. It the signal is sufficient for synchronization, we next perform a relatively accurate symbol time synchronization by measuring the correlation between a short training signal and the received envelope signal. Finally, an additional frequency synchronization is performed with a long training signal to correct symbol synchronization errors caused by the phase rotation. From the simulation results, one can see that the proposed synchronization scheme provides a good synchronization performance over frequency selective channels.
Keywords
synchronization; OFDM; symbol;
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