A Method For Fine Resolution Frequency Estimation From Three DFT Samples

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2011-06-01

Author

Candan, Çağatay

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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

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Department of Electrical and Electronics Engineering, Article

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Citation Formats

Ç. Candan, “A Method For Fine Resolution Frequency Estimation From Three DFT Samples,” IEEE SIGNAL PROCESSING LETTERS, pp. 351–354, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39671.