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Adaptive Algorithm for Chirp-Rate Estimation

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Abstract

Chirp-rate, as a second derivative of signal phase, is an important feature of nonstationary signals in numerous applications such as radar, sonar, and communications. In this paper, an adaptive algorithm for the chirp-rate estimation is proposed. It is based on the confidence intervals rule and the cubic-phase function. The window width is adaptively selected to achieve good tradeoff between bias and variance of the chirp-rate estimate. The proposed algorithm is verified by simulations and the results show that it outperforms the standard algorithm with fixed window width.

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Correspondence to Igor Djurović.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Djurović, I., Ioana, C., Stanković, L. et al. Adaptive Algorithm for Chirp-Rate Estimation. EURASIP J. Adv. Signal Process. 2009, 727034 (2009) doi:10.1155/2009/727034

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Keywords

  • Confidence Interval
  • Radar
  • Information Technology
  • Quantum Information
  • Sonar