A Simple Method for Improving the Performance of Three DFT Coefficients Based Frequency Estimators

In this work, a simple method for improving the performance of three DFT coefficients based fine frequency estimators is proposed. The computational complexity of the proposed method is quite low that it requires only a few additional multiplications and additions. Conducted simulations implies that the estimator improved by the proposed method has lower bias error, shows a better RMS error performance at all SNR levels and achieves the CRLB as the SNR increases.