A Robust Periodogram-Based IFO Estimation Scheme for OFDM-Based Wireless Systems

Date Added: Jul 2011
Format: PDF

In this paper, the authors propose a new periodogram-based Integer Frequency Offset (IFO) estimation scheme robust to the Fractional Frequency Offset (FFO) variation. The authors first observe the reason why the conventional IFO estimation scheme in this paper, which is sensitive to the variation of the FFO, and then, propose a new IFO estimation scheme using the modified Maximum-Likelihood (ML) metric. The numerical results demonstrate that the proposed scheme is more robust to the variation of the FFO and has better IFO estimation performance than the conventional scheme.