Fine Doppler Frequency Estimation of Windowed Complex Sinusoidal Signals for Radar Systems

Jongmann Kim, Hyunwoo Ko, Sungwon Hong, Chungyong Lee

Research output: Contribution to journalArticlepeer-review


This article presents a new fine Doppler frequency estimation method of complex sinusoidal signals for radar systems. The proposed method can work with nonrectangular window functions to suppress the interference signal caused by the undesired spectral leakage. This method is based on an interpolation curve that uses the sum and difference of two discrete Fourier transform (DFT) magnitudes, and can estimate an accurate frequency between the interpolation curve samples through precise linear approximation. The proposed method exhibits lower computational complexity than the conventional method, which compensates the bias of an arbitrary window function and exhibits high performance. Thus, the proposed method is applicable to radar systems requiring fast processing time. Furthermore, the simulation results show that the proposed method outperforms the conventional method for various window functions.

Original languageEnglish
Article number9210544
Pages (from-to)3860-3870
Number of pages11
JournalIEEE Sensors Journal
Issue number3
Publication statusPublished - 2021 Feb 1

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering


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