High-speed ground moving target detection research using triangular modulation FMCW

doi:10.1007/s11460-009-0032-z

Front Elect Electr Eng Chin

2009, Vol. 4

Issue (2) : 127-133 https://doi.org/10.1007/s11460-009-0032-z

RESEARCH ARTICLE

High-speed ground moving target detection research using triangular modulation FMCW

Yi LIANG¹(

), Mengdao XING¹, Zheng BAO¹, Long ZHANG²

1. National Key Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China; 2. Xi’an Polytechnic University, Xi’an 710048, China

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Abstract

The frequency modulated continuous wave (FMCW) radar has the characteristics of low probability of interception, good hidden property and the ability to counter anti-radiation missiles. This paper proposes a new method for high-speed ground moving target detection (GMTD) using triangular modulation FMCW. According to the characteristic of the opposite range shift induced by the upslope and downslope modulation FMCW, the upslope and downslope are imaged, respectively. After compensation of continuous motion of the platform and time difference between upslope and downslope signals for imaging, the moving target can be detected through displaced phase center antenna (DPCA) technology. When the moving target is detected, the moving target image is extracted, and correlation processing is used to obtain the range shift, which can be used to estimate the target radial velocity, and further to find the real position of the target. The effectiveness of this method is verified by the result of computer simulation.

Keywords ground moving target detection (GMTD) triangular modulation frequency modulated continuous wave (FMCW) correlation processing

Corresponding Author(s): LIANG Yi,Email:liangyi227@163.com

Issue Date: 05 June 2009

Cite this article:

Yi LIANG,Mengdao XING,Zheng BAO, et al. High-speed ground moving target detection research using triangular modulation FMCW[J]. Front Elect Electr Eng Chin, 2009, 4(2): 127-133.

URL:

https://academic.hep.com.cn/fee/EN/10.1007/s11460-009-0032-z
https://academic.hep.com.cn/fee/EN/Y2009/V4/I2/127

Fig.1 Time frequency relation of triangular modulation FMCW signal

Fig.2 Moving target geometry model

Fig.3 Processing block diagram of moving target detection using triangular modulation FMCW

Tab.1 System parameters

Fig.4 Imaging result of moving target with radial velocity -2 m/s. (a) Upslope FMCW SAR image; (b) result after cancellation

Fig.5 Imaging result of moving target with radial velocity -6 m/s. (a) Upslope FMCW SAR image; (b) result after cancellation

Fig.6 Imaging result of moving target with radial velocity -13 m/s. (a) Upslope FMCW SAR image; (b) result after cancellation

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