Iterative Interpolation for Parameter Estimation of LFM Signal Based on Fractional Fourier Transform

作者：Song, Jun^*; Wang, Yixiong; Liu, Yunfei

来源：Circuits, Systems, and Signal Processing, 2013, 32(3): 1489-1499.

DOI：10.1007/s00034-012-9517-8

• LFM signal
• Parameter estimation
• Fractional Fourier transform
• Iterative interpolation

This study introduces two iterative interpolation algorithms for the parameter estimation of linear frequency modulation (LFM) signal using fractional Fourier transform (FrFT). The estimated parameter of an LFM signal can be obtained by locating the peak of the periodogram in the FrFT domain. Two interpolation algorithms were proposed to improve the accuracy of parameter estimation by employing the FrFT coefficients relative to the true parameters and applying interpolation algorithms iteratively to refine the parameter estimation approach. The proposed algorithms can utilize more information from FrFT results, thereby achieving improvements in either accuracy or efficiency. Moreover, the simulation results revealed the validity and advantage of the proposed approach.

• 单位
  南京林业大学