An Improved Cross-Correlation Velocity Measurement Method Based on Fraction Delay Estimation

Conference paper

Abstract

For target detection, identification and imaging, velocity estimation of high-speed targets is very important. Since the target echoes may not locate at the same range bin, and the Doppler velocity is seriously ambiguous, it is difficult to apply the traditional Doppler velocity method into estimation of high speed targets. Currently a wideband cross-correlation method is widely used to estimate the velocity. However, the measurement accuracy is limited by the sampling interval. An improved cross-correlation velocity measurement method based on the fractional delay estimation is proposed in this paper, and corresponding simulations are carried out. The results show that the estimation accuracy of the proposed method is within 1 m/s in the situation of wideband. The proposed method breaks through the limitation of integer sampling interval, as well as results in higher estimation accuracy.

Keywords

Cross-correlation Fractional delay estimation High-speed targets Target detection Velocity measurement Wideband 

Notes

Acknowledgments

This work was supported by Industry-academic Joint Technological Innovations Fund Project of Jiangsu Province (BY2012187).

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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  1. 1.School of Electronic Science and EngineeringNanjing UniversityNanjingPeople’s Republic of China

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