Coherent accumulation over a long period of time has been an effective means to enhance radar echo energy. However, for high-speed moving targets, within a long coherent processing interval, across range unit (ARU) and Doppler frequency migration (DFM) caused by their velocity and acceleration in the radar radial direction cannot be ignored. Additionally, the velocity ambiguity problem caused by high speed also needs to be addressed. This paper proposes a high-speed target detection method based on motion parameter estimation. By segmenting coherent accumulation, the ARU under each segment is suppressed. The peak position of the echo after accumulation under each segment is used as a sample point for parameter estimation input. A filter is constructed using the target radial acceleration obtained through searching to compensate for nonlinear components in the echo phase. Finally, keystone transform is used in conjunction with velocity ambiguity term compensation to correct ARU in radar echoes, and coherent accumulation of the high-speed target echo signal is achieved by performing FFT along the azimuth.
GUO Zhenfang
,
SUN Jili
,
WANG Shuai
. Radar high-speed target detection method based on motion parameter estimation[J]. Journal of University of Chinese Academy of Sciences, 2025
, 42(6)
: 792
-805
.
DOI: 10.7523/j.ucas.2024.011
[1] Guo Y F, Zhang Y L, Xue A K. Coherent integration weak target detection algorithm based on short time sliding window[C]//Proceedings of the 10th World Congress on Intelligent Control and Automation. Beijing, China. IEEE, 2012: 4264-4266. DOI: 10.1109/WCICA.2012.6359195.
[2] Cantrell B, de Graaf J, Willwerth F, et al. Development of a digital array radar (DAR)[J]. IEEE Aerospace and Electronic Systems Magazine, 2002, 17(3): 22-27. DOI: 10.1109/62.990350.
[3] Tao R, Zhang N, Wang Y. Analysing and compensating the effects of range and Doppler frequency migrations in linear frequency modulation pulse compression radar[J]. IET Radar, Sonar & Navigation, 2011, 5(1): 12. DOI: 10.1049/iet-rsn.2009.0265.
[4] Carlson B D, Evans E D, Wilson S L. Search radar detection and track with the Hough transform. Ⅰ. system concept[J]. IEEE Transactions on Aerospace and Electronic Systems, 1994, 30(1): 102-108. DOI: 10.1109/7.250410.
[5] Carlson B D, Evans E D, Wilson S L. Search radar detection and track with the Hough transform. Ⅱ. detection statistics[J]. IEEE Transactions on Aerospace and Electronic Systems, 1994, 30(1): 109-115. DOI: 10.1109/7.250411.
[6] Carlson B D, Evans E D, Wilson S L. Search radar detection and track with the Hough transform. Ⅲ. detection statistics[J]. IEEE Transactions on Aerospace and Electronic Systems, 1994, 30(1): 116-125. DOI: 10.1109/7.250412.
[7] Carretero-Moya J, Gismero-Menoyo J, Asensio-Lopez A, et al. Small-target detection in sea clutter based on the Radon Transform[C]//2008 International Conference on Radar. Adelaide, SA, Australia. IEEE, 2008: 610-615. DOI: 10.1109/RADAR.2008.4653995.
[8] Xu J, Yu J, Peng Y N, et al. Radon-fourier transform for radar target detection (Ⅰ): generalized Doppler filter bank[J]. IEEE Transactions on Aerospace and Electronic Systems, 2011, 47(2): 1186-1202. DOI: 10.1109/TAES.2011.5751251.
[9] Xu J, Yu J, Peng Y N, et al. Radon-fourier transform for radar target detection (Ⅱ): blind speed sidelobe suppression[J]. IEEE Transactions on Aerospace and Electronic Systems, 2011, 47(4): 2473-2489. DOI: 10.1109/TAES.2011.6034645.
[10] Yu J, Xu J, Peng Y N, et al. Radon-fourier transform for radar target detection (Ⅲ): optimality and fast implementations[J]. IEEE Transactions on Aerospace and Electronic Systems, 2012, 48(2): 991-1004. DOI: 10.1109/TAES.2012.6178044.
[11] 吴兆平, 符渭波, 苏涛, 等. 基于快速 Radon-Fourier 变换的雷达高速目标检测[J]. 电子与信息学报, 2012, 34(8): 1866-1871. DOI: CNKI:SUN:DZYX.0.2012-08-013.
[12] Rao X, Tao H H, Su J, et al. Axis rotation MTD algorithm for weak target detection[J]. Digital Signal Processing, 2014, 26: 81-86. DOI: 10.1016/j.dsp.2013.12.003.
[13] Chen X L, Guan J, Liu N B, et al. Maneuvering target detection via radon-fractional Fourier transform-based long-time coherent integration[J]. IEEE Transactions on Signal Processing, 2014, 62(4): 939-953. DOI: 10.1109/TSP.2013.2297682.
[14] Xu J, Xia X G, Peng S B, et al. Radar maneuvering target motion estimation based on generalized radon-fourier transform[J]. IEEE Transactions on Signal Processing, 2012, 60(12): 6190-6201. DOI: 10.1109/TSP.2012.2217137.
[15] Sun Z, Li X L, Cui G L, et al. A fast approach for detection and parameter estimation of maneuvering target with complex motions in coherent radar system[J]. IEEE Transactions on Vehicular Technology, 2021, 70(10): 10278-10292. DOI: 10.1109/TVT.2021.3104659.
[16] Zhang J C, Su T, Zheng J B, et al. Novel fast coherent detection algorithm for radar maneuvering target with jerk motion[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017, 10(5): 1792-1803. DOI: 10.1109/JSTARS.2017.2651156.
[17] Tian J, Cui W, Wu S. A novel method for parameter estimation of space moving targets[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 11(2): 389-393. DOI: 10.1109/LGRS.2013.2263332.
[18] Li G, Xia X G, Peng Y N. Doppler keystone transform: an approach suitable for parallel implementation of SAR moving target imaging[J]. IEEE Geoscience and Remote Sensing Letters, 2008, 5(4): 573-577. DOI: 10.1109/LGRS.2008.2000621.
[19] Perry R P, DiPietro R C, Fante R L. SAR imaging of moving targets[J]. IEEE Transactions on Aerospace and Electronic Systems, 1999, 35(1): 188-200. DOI: 10.1109/7.745691.
[20] Zhang S S, Zeng T, Long T, et al. Dim target detection based on keystone transform[C]//IEEE International Radar Conference. Arlington, VA, USA. IEEE, 2005: 889-894. DOI: 10.1109/RADAR.2005.1435953.
[21] Yuan S J, Wu T, Mao M, et al. Application research of keystone transform in weak high-speed target detection in low-PRF narrowband Chirp radar[C]//2008 9th International Conference on Signal Processing. Beijing, China. IEEE, 2008: 2452-2456. DOI: 10.1109/ICOSP.2008.4697645.
[22] Zhu D Y, Li Y, Zhu Z D. A keystone transform without interpolation for SAR ground moving-target imaging[J]. IEEE Geoscience and Remote Sensing Letters, 2007, 4(1): 18-22. DOI: 10.1109/LGRS.2006.882147.
