Improved Pilot Symbol-Assisted Estimation of Integer Frequency Offset for OFDM

摘要

This paper deals with a simple way of estimating the integer frequency offset (IFO) of orthogonal frequency division multiplexing (OFDM) system. By modifying the conventional maximum likelihood (ML) estimator to have twostage estimation strategy, the IFO estimator is derived. Simulations indicate that the proposed IFO estimator works robustly when compared to ML estimator.