Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (10): 147-151.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Sinusoidal Frequency Estimation ßased on Inversion Integral Equation

Wei Gang  Li Dao-yuan  Chen Fang-jiong   

  1. School of Electronic and Information Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2007-03-01 Online:2007-10-25 Published:2007-10-25
  • Contact: Wei Gang( born in 1963), male,professor , Ph. D.tutor , mainly researches on communication systems. E-mail:ecgwei@ scut. edu. cn
  • About author:Wei Gang( born in 1963), male,professor , Ph. D.tutor , mainly researches on communication systems.
  • Supported by:

    Supported by the National Nature Science Foundation of China (60402014 ,60625101)

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Abstract:

In traditional frequency estimation algorithms , there exists a general problem arising from the discrepancy between the costly computation and the unsatisfactory performance under low SNRs (Signal-to-Noise Ratios). In order to solve this problem , this paper proposes a new frequency estimation algorithm based on the IIE (Inversion Integral Equation) approach. In this algorithm , FIT (Fast Fourier Transform) is used to roughly estimate the frequency , based on which an IIE is constructed according to the narrow-band signal resulting from FIT. Then , the fine frequency is estimated by calculating the parameters and characteristic frequency of the IIE. Simulated results show that the proposed algorithm is of good performance and moderate computationaI requirement under low SNRs.

Key words: frequency estimation, integral equation, characteristic frequency