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A Method For Fine Resolution Frequency Estimation From Three DFT Samples
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Date
2011-06-01
Author
Candan, Çağatay
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The parameter estimation of a complex exponential waveform observed under white noise is typically tackled in two stages. In the first stage, a coarse frequency estimate is found by the application of an N-point DFT to the input of length N. In the second stage, a fine search around the peak determined in the first stage is conducted. The method proposed in this paper presents a simpler alternative. The method suggests a nonlinear relation involving three DFT samples already calculated in the first stage to produce a real valued, fine resolution frequency estimate. The estimator approaches Jacobsen's estimator for large N and presents a bias correction which is especially important for small and medium values of N.
Subject Keywords
Frequency estimation
,
Fine doppler estimation
,
Radar signal processing
,
DFT
URI
https://hdl.handle.net/11511/39671
Journal
IEEE SIGNAL PROCESSING LETTERS
DOI
https://doi.org/10.1109/lsp.2011.2136378
Collections
Department of Electrical and Electronics Engineering, Article