Comments on "Line tracking using autoregressive spectral estimates"

In [1], it was asserted that a spectral line tracker based upon the maximum entropy spectral estimator provides a "significant improvement in tracking performance" over a line tracker based on the Fourier transform spectral estimator. It is shown that the poor performance of the Fourier transform tracker was due in part to the particular implementation of the tracker. In fact, at low signal-to-noise ratios the capabilities of the maximum entropy and Fourier transform spectral estimates to track time-varying spectral lines ate nearly identical.