Development of radar technology needs to address the two-dimensional high resolution of range and velocity simultaneously for high-speed targets. Taking advantage of the superior coherent performance of synthetic wideband pulse Doppler radar, this paper elaborates the principles of phase-derived range and velocity measurements. Moreover, this paper explores the key technologies of unwrapping phase ambiguity, and discusses the phase unwrapping strategy at a low signal-to-noise ratio (SNR). The proposed method can be applied to the conditions of low SNR and has comparatively strong practicality in engineering. Both the ejection ball and civil aircraft experiments have validated the correctness and feasibility of the proposed method. In particular, the experimental results reveal that the accuracy of phase-derived range and velocity measurement has reached a level of submillimeter or millimeter and centimeter/second or submillimeter/second, respectively.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Liu H B, Lu J D. Target motion compensation algorithm based on Keystone transform for wideband pulse Doppler radar. Trans Beijing Inst Tech, 2012, 32: 625–630
Long T, Ren L X. HPRF pulse Doppler stepped frequency radar. Sci China Ser F-Inf Sci, 2009, 52: 883–893
Bao Y X. Signal processing algorithms in stepped frequency wideband radar. Dissertation for PH.D. Degree. Beijing: Beijing Institute of Technology, 2010. 40–106
Gao W B, Ding Z G, Zhu D L, et al. Improved spectrum reconstruction technique based on chirp rate modulation in stepped-frequency SAR. Sci China Inf Sci, 2015, 58: 102308
Jin K, Wang W D, Wang D J. The study on a new radar waveform (PCSF) with high range resolution. J Univ Sci Tech China, 2006, 36: 137–142
Steudel F. An Improved Process for Phase-Derived-Range Measurements. World Intellectual Property Organization Patent, 1651978, 2005-2-24
Steudel F. Process for Phase-Derived-Range Measurements. U.S. Patent, 7046190, 2005-2-10
Skolnik M I. Introduction to Radar Systems. 3rd ed. Beijing: Publishing House of Electronics Industry, 2007. 313–402
Liu Y, Hou Q K, Xu S Y, et al. System distortion analysis and compensation of DIFS signals for wideband imaging radar. Sci China Inf Sci, 2015, 58: 020304
Wang H F, Ren L X. Velocity estimation of moving targets with stepped-frequency radar based on Doppler frequency difference. J Beijing Inst Tech, 2014, 23: 78–82
Li L. Theory and implementation of stepped-frequency radar signal processing. Dissertation for PH.D. Degree. Beijing: Beijing Institute of Technology, 2010. 55–68
Tian J, Cui W, Shen Q, et al. High-speed maneuvering target detection approach based on joint RFT and keystone transform. Sci China Inf Sci, 2013, 56: 062309
Gao M G, Zhou D Y, Mao E K. A method of digital moving target track based on waveform analysis. Chinese J Electron, 1998, 26: 112–114
Liu Y X, Zhu D K, Li X, et al. Micromotion characteristic acquisition based on wideband radar phase. IEEE Trans Geosci Remote Sens, 2014, 52: 3650–3657
Bao Y X, Ren L X, He P K, et al. Velocity measurement and compensation method based on range profile crosscorrelation in stepped-frequency radar. Syst Eng Electron, 2008, 30: 2112–2115
Li L, Ren L X, Mao E K, et al. Accurate velocity measurement of range profile cross correlation in stepped-frequency signal. Trans Beijing Inst Tech, 2011, 31: 708–712
Wang G Y, Bao Z. The minimum entropy criterion of range alignment in ISAR motion compensation. In: Proceedings of Conference Radar, Edinburgh, 1997. 14–16
This work was supported by 111 Project of China (Grant No. B14010) and National Natural Science Foundation of China (Grant No. 61301189).
About this article
Cite this article
Fan, H., Ren, L., Long, T. et al. A high-precision phase-derived range and velocity measurement method based on synthetic wideband pulse Doppler radar. Sci. China Inf. Sci. 60, 082301 (2017). https://doi.org/10.1007/s11432-016-0097-4
- synthetic wideband PD radar
- phase-derived range measurement
- phase-derived velocity measurement
- unwrapping phase ambiguity
- track filtering
- minimum entropy method