Phase correction of discrete Fourier transform coefficients to reduce frequency estimation bias of single tone complex sinusoid
A phase term in DFT coefficient is a cause of bias in frequency estimation. Propose three different ways to correct the phase and reduce bias. Derive the amount of bias reduction that can be achieved by phase correction. Derive frequency threshold between phase correction and post-estimation correction. Propose a hybrid estimator which switches corrections at threshold.
frequency estimation estimation bias single tone complex sinusoid bias reduction