Dynamic Feedback Carrier Frequency Offset Estimator for OFDM Systems

This paper presents an efficient feedback synchronization technique for joint estimation of integer and fractional carrier frequency offsets in orthogonal frequency division multiplexing (OFDM) systems. The proposed technique has high accuracy, broad estimation range, and works effectively over frequency-selective radio channels. A dynamic self-noise reduction technique is introduced to enhance the estimation accuracy over a wide range of signal-to-noise ratios by changing the synchronizer S-curve.