A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel

Deng  Yun-Kai; Liu  Ya-Dong; Xing  Kun; Qi Hai-Ming; Chen  Qian

doi:10.3724/SP.J.1146.2010.00153

Volume 33 Issue 1

Feb. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2011 > 33(1): 14-20

Deng Yun-Kai, Liu Ya-Dong, Xing Kun, Qi Hai-Ming, Chen Qian. A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel[J]. Journal of Electronics & Information Technology, 2011, 33(1): 14-20. doi: 10.3724/SP.J.1146.2010.00153

Citation:

Deng Yun-Kai, Liu Ya-Dong, Xing Kun, Qi Hai-Ming, Chen Qian. A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel[J]. Journal of Electronics & Information Technology, 2011, 33(1): 14-20. doi: 10.3724/SP.J.1146.2010.00153

Citation:

Deng Yun-Kai, Liu Ya-Dong, Xing Kun, Qi Hai-Ming, Chen Qian. A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel[J]. Journal of Electronics & Information Technology, 2011, 33(1): 14-20. doi: 10.3724/SP.J.1146.2010.00153

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A High Accurate Method of Estimating Moving Targets Parameters Using Time-frequency Analysis and Dechirp Technology with Multi-channel

doi: 10.3724/SP.J.1146.2010.00153

Received Date: 2010-02-11
Rev Recd Date: 2010-07-12
Publish Date: 2011-01-19

Abstract

Abstract

Traditional approaches, such as the Displaced Phase Center Antenna (DPCA) and Along Track Interferometer (ATI), fail to mitigate the negative impact on the detection of?a target and the estimation of the parameters due to the defocus problem associated with the targets azimuth velocity. In addition, these two approaches also fall short in estimating the targets azimuth velocity. To solve above problems, this paper proposes a multi-channel moving target detection method which combines the time-frequency analysis method of Modified Discrete Chirp-Fourier Transformation (MDCFT) and dechirp technology. Through accurately estimating?a moving target's doppler parameters, the proposed method can realize the focusing of?the moving target. As a result, the accuracy of estimation on the moving targets radical velocity, azimuth position, as well as azimuth velocity can be significantly improved. In all, the proposed method can overcome the disadvantages of the traditional DPCA and ATI approaches, and the e fectiveness of the proposed method is proved through both theoretic analysis and compute simulation.
- SAR,
- GMTI (Ground Moving Target Indication),
- Time-frequency analysis,
- MDCFT (Modified Discrete Chirp-Fourier Transformation),
- Dechirp

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References

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