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Comments on “Iterative Estimation of Sinusoidal Signal Parameters”

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2 Author(s)
Prabhu Babu ; Dept. of Information Technology, Uppsala University, Uppsala, Sweden ; Petre Stoica

In this note, we show that the iterative frequency estimation technique proposed in is nothing but an approximate Gauss-Newton (GN) algorithm for minimizing the standard nonlinear least squares fitting criterion. Starting from the complex sinusoidal data model used in , we derive the GN algorithm for frequency estimation and show that by approximating some steps in the GN algorithm we arrive at the estimator proposed in . We then numerically compare the performances of GN and approximate GN algorithms with that of zero padded FFT.

Published in:

IEEE Signal Processing Letters  (Volume:17 ,  Issue: 12 )