Novel Parameter Estimation Method for Chirp Signals Using Bowtie Chirplet and Discrete Fractional Fourier Transform

2008 ◽  
Author(s):  
Ahmed Mostayed ◽  
Sikyung Kim ◽  
Saurav Zaman Khan Sajib
Keyword(s):  
Fourier Transform ◽  
Parameter Estimation ◽  
Fractional Fourier Transform ◽  
Estimation Method ◽  
Parameter Estimation Method ◽  
Discrete Fractional Fourier Transform ◽  
Chirp Signals

Parameter Estimation Method of the Non-Cooperative Radar Target Based on Fractional Fourier Transform

2013 ◽  
Vol 333-335 ◽  
pp. 611-615
Author(s):  
Hua Ling Guo ◽  
Bin Zheng ◽  
Li Ping Liu
Keyword(s):  
Fourier Transform ◽  
Parameter Estimation ◽  
Frequency Modulation ◽  
High Speed ◽  
Fractional Fourier Transform ◽  
Estimation Method ◽  
Doppler Imaging ◽  
Low Snr ◽  
Parameter Estimation Method

To solve the effect of the range imaging broadening, the speed estimation of high-speed non-cooperative target of inverse synthetic aperture lidar translated for the estimation of the frequency modulation slope. A parameter estimation method of fractional Fourier transform (FRFT) was presented. This method could effectively estimate the frequency modulation slope. Under low SNR, the error of the estimate was less than 0.03. The research laid the foundation for velocity compensation and 2-D range-Doppler imaging of the follow-up.

Parameter Estimation and Restoration of Motion-Blurred Images

2012 ◽  
Vol 239-240 ◽  
pp. 1138-1141
Author(s):  
Pei Zhi Wen ◽  
Kai Guo ◽  
Li Fang Li
Keyword(s):  
Image Processing ◽  
Fourier Transform ◽  
Parameter Estimation ◽  
Image Restoration ◽  
Estimation Method ◽  
Parameter Estimation Method ◽  
Length Estimation ◽  
Blurred Image ◽  
Blurred Images

The motion-blurred image restoration has been the difficulty of the field of image processing. In this paper, proposed a motion-blurred length method based on Fourier transform of the parameter estimation method. The method improved the accuracy of the blurred length estimation. The method improved the effect of the motion-blurred image restoration. The experiments verified that the accuracy and feasibility of the method proposed.

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