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Parameter Estimation of LFM Signal Based on Improved Fractional Fourier Transform

Published: 29 June 2022 Publication History

Abstract

Given the current computational complexity and the unsatisfactory anti-noise performance of the linear frequency modulated (LFM) signal parameter estimation method, this paper proposes a rather innovative and efficient method based on improved fractional Fourier transform (FrFT). This method first obtains the energy distribution of time-frequency domain (TFD) through short-time Fourier transform (STFT), which is used to determine the order search range of FrFT. On the other hand, incoherent accumulation is also employed to improve the anti-noise performance under low signal-to-noise-ratio (SNR) environments. Extensive computer simulations verified that the algorithm displays a good anti-noise performance while reducing the amount of calculation.

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  • (2024)Parameter Extraction Method of Overlapping Radar Signals Using Modulation Recognition-Guided Semantic SegmentationIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing10.1109/JSTARS.2024.336190517(4581-4596)Online publication date: 2024
  1. Parameter Estimation of LFM Signal Based on Improved Fractional Fourier Transform

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      cover image ACM Other conferences
      ICDSP '22: Proceedings of the 6th International Conference on Digital Signal Processing
      February 2022
      253 pages
      ISBN:9781450395809
      DOI:10.1145/3529570
      Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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      Published: 29 June 2022

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      Author Tags

      1. chirp signal
      2. fractional Fourier transform
      3. linear frequency modulated signal
      4. parameter estimation
      5. short-time Fourier transform

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      • (2024)Parameter Extraction Method of Overlapping Radar Signals Using Modulation Recognition-Guided Semantic SegmentationIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing10.1109/JSTARS.2024.336190517(4581-4596)Online publication date: 2024

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