In order to solve the problem of calculation and storage in traditional Hough transform and improve the computation speed and veracity in the LFM signal parameter estimation, the time-fre- quency character of single- component LFM signal with noise was obtained by Wigner-Ville distribution (WVD), the instantaneous frequency was estimated using a maximum value method; the parameter estimation was realized though randomized Hough transform (RHT) based on a section of the frequen-cy. The computed and analyzed results show that, compared with the traditional WVD-HT, WVD- RHT has lower computation load and better practicability, in which the computation time is about one third of WVD-HT, but the estimation precision is higher than WVD-HT.
Key words
information processing technique /
Wigner-Ville distribution /
randomized Hough trans?form /
parameter estimation /
instantaneous frequency
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Footnotes
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