A Frequency Estimator for Real Valued Sinusoidal Signals Using Three DFT Samples

This paper presents a simple frequency estimator for real valued sinusoidal signals using only three DFT samples. Simulations confirm that our proposed method outperforms traditional alternatives based on three DFT samples. Compared with estimators for complex sinusoidal signals, our method increases the estimation accuracy thanks to its consideration of negative spectrum components. Compared with the estimators with windowing technique, our method also has better performance in spite of lower complexity.