A novel parameter estimation method of chirp signal based on Fractional Fourier Transform

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.

Download Full-text

Parameter Estimation and Restoration of Motion-Blurred Images

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.239-240.1138 ◽

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.

Download Full-text

Analysis of Parameter Estimation Using Pei Algorithm of FRFT

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.577.758 ◽

2014 ◽

Vol 577 ◽

pp. 758-761

Author(s):

Bing Deng

Keyword(s):

Fourier Transform ◽

Parameter Estimation ◽

Fractional Fourier Transform ◽

Estimation Accuracy ◽

Chirp Signal ◽

Factors Influencing

Parameter estimation of chirp signal is analyzed using Pei algorithm of FRFT (Fractional Fourier Transform). Firstly, the model of parameter estimation has been made. Secondly, the factors influencing the estimation accuracy have been analyzed. Finally, the simulation has been made to verify the conclusions.

Download Full-text

A Parameter Estimation Method for Poly-Phase Coded Signal Based on the Modified Fractional Fourier Transform

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.588-589.715 ◽

2012 ◽

Vol 588-589 ◽

pp. 715-718

Author(s):

Guo Yi Zhang ◽

Xu Zhou Zhang ◽

Jia Na Li

Keyword(s):

Fourier Transform ◽

Parameter Estimation ◽

Fractional Fourier Transform ◽

Signal To Noise Ratio ◽

Computational Cost ◽

Estimation Method ◽

Wigner Transform ◽

Signal To Noise ◽

Quadratic Phase ◽

Estimate Frequency

To estimate parameters of poly-phase coded radar signals, a modified Fractional Fourier transform (FrFT) is advanced. This algorithm employs Integrated Quadratic Phase function (IQPF) to estimate frequency rate with which the best degree for Frft is computed. Its computational cost is lower than that of Radon-Wigner transform (RWT) and Radon-Ambiguity transform (RAT). When the signal-to-noise ratio (SNR) is -7 dB, Simulations show its parameter estimation performance closes to the Cramer-Rao Lower Bounds (CRLB).

Download Full-text

Detection and Parameter Estimation of Chirp Signal Based on Time-Frequency Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.989-994.3989 ◽

2014 ◽

Vol 989-994 ◽

pp. 3989-3992

Author(s):

Guang Zhi Wu ◽

Gang Fu ◽

Yan Jun Wu

Keyword(s):

Fourier Transform ◽

Parameter Estimation ◽

Fractional Fourier Transform ◽

Chirp Signal ◽

Wigner Transform ◽

Time Frequency ◽

The Relationship ◽

Generic Time ◽

Time Frequency Distribution ◽

Better Than

Based on the relationship between the Radon-Wigner transform and fractional Fourier transform and the time frequency distribution, using the property that Radon-Wigner transform has better performance in time and frequency domain, detection and parameter estimation of Chirp signal have been done by Radon-Wigner transform or fractiona1 Fourier transform. The theoretica1 analysis and simulation prove that two techniques are better than generic time-frequency transform, such as Wigner-Ville transform.

Download Full-text