双基地宽带成像雷达时间及调频率同步方法

doi:10.12305/j.issn.1001-506X.2024.04.07

摘要/Abstract

摘要：

双基地宽带成像雷达由于不同源会产生时间同步误差和调频率同步误差。针对这一问题, 面向低成本、小型化雷达接收机设计同步方法。针对时间同步问题, 提出了直达波触发的收发脉宽非一致时间同步方案, 通过使用直达波触发接收窗启用时刻, 同时增加接收窗长度和低通匹配滤波, 以完成时间同步。针对调频率同步问题, 提出了采用吕氏分布对调频率误差进行估计, 进而进行补偿, 以完成调频率同步。该时间及调频率同步方法基本不需要增加接收机硬件成本, 可以适应小型化接收雷达需求。基于小型宽带雷达搭建室内的双基宽带雷达模型, 实验实现了双基雷达同步以及数据采集、成像。实验结果验证了所提方法的有效性。

关键词: 双基地雷达, 时间同步, 调频率同步, 宽带成像雷达

Abstract:

Bistatic wideband imaging radar generates time synchronization errors and chirp rate errors due to different sources. To address this issue, for low-cost and miniaturized radar receivers, synchronization methods are designed. To solve the time synchronization problem, the nonuniformity time synchronization scheme with transmitting and receiving pulse width triggered by direct wave is proposed, which is using direct-wave-to trigger receive window enable moments, while increasing the receive window length and low-pass matching filtering to complete the time synchronization. To solve the chirp rate synchronization problem, it is proposed to estimate the chirp rate frequency error using Lv's distribution, and to further compensate it to complete the chirp rate synchronization. The time and chirp synchronization method basically does not need to increase the receiver hardware cost and can be adapted to the miniaturized receiving radar ' s requirements. Based on the small wideband radar to build indoor bistatic wideband radar model, the experimental validation is conducted to realize the bistatic radar synchronization as well as data acquisition and imaging. The experimental results verify the effectiveness of the proposed method.

Key words: bistatic radar, time synchronization, chirp rate synchronization, wideband imaging radar

中图分类号:

TN957

李亮, 黄洋, 金光虎, 董臻, 何峰, 邹慕兰. 双基地宽带成像雷达时间及调频率同步方法[J]. 系统工程与电子技术, 2024, 46(4): 1193-1203.

Liang LI, Yang HUANG, Guanghu JIN, Zhen DONG, Feng HE, Mulan ZOU. Time and chirp rate synchronization method of bistatic wideband imaging radar[J]. Systems Engineering and Electronics, 2024, 46(4): 1193-1203.

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参考文献 32

1	何鹏远, 杨志伟, 谭啸. 星载双基地雷达杂波抑制能力分析与构型优选[J]. 系统工程与电子技术, 2022, 44 (2): 440- 447.
	HE P Y , YANG Z W , TAN X . Performance analysis and configuration optimization of clutter repection ability of spaceborne bistatic radar[J]. Systems Engineering and Electronics, 2022, 44 (2): 440- 447.
2	MAROM H , BAR-SHALOM Y , MILGROM B . Bistatic radar tracking with significantly improved bistatic range accuracy[J]. IEEE Trans.on Aerospace and Electronic Systems, 2022, 1- 29.
3	CHRIS P . An introduction to passive radar[J]. Aeronautical Journal, 2017, 121 (1244): 1601- 1603. doi: 10.1017/aer.2017.85
4	MARTORELLA M . Analysis of the robustness of bistatic inverse synthetic aperture radar in the presence of phase synchro- nization errors[J]. IEEE Trans.on Aerospace and Electronic Systems, 2011, 47 (4): 2673- 2689. doi: 10.1109/TAES.2011.6034658
5	LIANG D , LIU K Y , DENG Y K , et al. A high-accuracy synchronization phase-compensation method based on Kalman filter for bistatic synthetic aperture radar[J]. IEEE Geoscience and Remote Sensing Letters, 2020, 17 (10): 1722- 1726. doi: 10.1109/LGRS.2019.2952475
6	MING H , PAN Q H , HAN S F , et al. Impacts of space-time-frequency synchronization errors on wide-band target echo cha-racteristics of bistatic/multistatic radar[J]. Journal of Systems Engineering and Electronics, 2016, 27 (3): 562- 573. doi: 10.1109/JSEE.2016.00060
7	CHEN J M , WANG T , LIU X Y , et al. Time and phase synchronization using clutter observations in airborne distributed coherent aperture radars[J]. Chinese Journal of Aeronautics, 2022, 35 (3): 432- 449. doi: 10.1016/j.cja.2021.08.040
8	LIANG D, ZHANG H, LIU K Y, et al. The processing of synchronization in bistatic synthetic aperture radar[C]//Proc. of the 21st International Radar Symposium, 2020: 276-280.
9	LIU J Y , CHEN X H . Time synchronization for multistatic radar via microwave and troposcatter[J]. The Journal of Engineer- ing, 2018, 2018 (1): 39- 41.
10	YANG Y , BLUM R S . Phase synchronization for coherent MIMO radar: algorithms and their analysis[J]. IEEE Trans.on Signal Processing, 2011, 59 (11): 5538- 5557. doi: 10.1109/TSP.2011.2162509
11	DONG J , SHANG C X , GAO M G , et al. Modeling and simulation on time synchronization of indirect synchronization continuous sampling mode bistatic ISAR[J]. Journal of Data Acquisition and Processing, 2011, 26 (3): 347- 355.
12	JEAN O , WEISS A J . Synchronization via arbitrary satellite signals[J]. IEEE Trans.on Signal Processing, 2014, 62 (8): 2042- 2055. doi: 10.1109/TSP.2014.2304928
13	YATES G , HOME A , MIDDLETON R , et al. Bistatic SAR image formation[J]. IEE Proceedings, Radar, Sonar and Navigation, 2006, 153 (3): 208- 213. doi: 10.1049/ip-rsn:20045091
14	MA C , YANG J , CHEN J Y , et al. Time synchronization requirement of global navigation satellite system augmentation system based on pseudolite[J]. Measurement and Control (United Kingdom), 2019, 52 (3-4): 303- 313.
15	BEHNER F , REUTER S , NIES H , et al. Synchronization and processing in the Hitchhiker bistatic SAR experiment[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016, 9 (3): 1028- 1035. doi: 10.1109/JSTARS.2015.2471082
16	吴刚, 刘银年, 王建宇. 伪卫星时钟同步方法的研究[J]. 光纤与电缆及其应用技术, 2007, (2): 25- 28.
	WU G , LIU Y N , WANG J Y . Study on pseudo lite clock synchronization[J]. Optical Fiber & Electric Cable and Their Applications, 2007, (2): 25- 28.
17	RODRIGUEZ C M, PRATS P, BAUMGARTNER S, et al. New processing approach and results for bistatic TerraSAR-X/F-SAR spaceborne-airborne experiments[C]//Proc. of the International Geoscience and Remote Sensing Symposium, 2009: 47-52.
18	张永胜, 王敏, 梁甸农, 等. 星载寄生式InSAR系统频率同步误差分析[J]. 信号处理, 2007, 23 (6): 927- 931.
	ZHANG Y S , WANG M , LIANG D N , et al. Analysis of frequency synchronization error in spaceborne parasitic interferometric SAR system[J]. Journal of Signal Processing, 2007, 23 (6): 927- 931.
19	任光亮, 常义林, 张辉, 等. 无线OFDM系统时频同步方法研究[J]. 西安电子科技大学学报, 2005, 32 (5): 758-761, 817.
	REN G L , CHANG Y L , ZHANG H , et al. Timing and frequency synchronization method for wireless OFDM systems[J]. Journal of Xidian University, 2005, 32 (5): 758-761, 817.
20	LI W C, ZOU D S, LI Y, et al. An estimation scheme of the linear time synchronization error for bistatic forward-looking SAR[C]//Proc. of the IEEE Radar Conference, 2019: 1-3.
21	YU W C , SU W M , GU H . Fast method for radar maneuvering target detection and motion parameter estimation[J]. Multi- dimensional Systems and Signal Processing, 2018, 29 (4): 1411- 1425. doi: 10.1007/s11045-017-0508-6
22	LI X L , CUI G L , KONG L J , et al. Fast non-searching method for maneuvering target detection and motion parameters esti-mation[J]. IEEE Trans.on Signal Processing, 2016, 64 (9): 2232- 2244. doi: 10.1109/TSP.2016.2515066
23	CUMMING I G , WONG F H . Synthetic aperture radar (SAR) imaging[M]. Beijing: Publishing House of Electronics Industry, 2019: 193- 197.
24	WANG Y , ZHOU X Y , LU X F , et al. An approach of motion compensation and ISAR imaging for micro-motion targets[J]. Journal of Systems Engineering and Electronics, 2021, 32 (1): 68- 80. doi: 10.23919/JSEE.2021.000008
25	ZENG C Z , ZHU W G , JIA X . Bistatic ISAR sparse imaging method for high-speed moving target based on dechirping processing[J]. International Journal of Antennas & Propagation, 2019, 2019 (1): 9710968.
26	HU J M , ZHOU W , FU Y W , et al. Uniform rotational motion compensation for ISAR based on phase cancellation[J]. IEEE Geoscience and Remote Sensing Letters, 2011, 8 (4): 636- 640. doi: 10.1109/LGRS.2010.2098841
27	WANG Y . New method of time-frequency representation for ISAR imaging of ship targets[J]. Journal of Systems Engineering and Electronics, 2012, 23 (4): 502- 511. doi: 10.1109/JSEE.2012.00064
28	LV X L , BI G A , WAN C R , et al. Lv's distribution: principle, implementation, properties, and performance[J]. IEEE Trans.on Signal Processing, 2011, 59 (8): 3576- 3591. doi: 10.1109/TSP.2011.2155651
29	XIA B , YAN W , JUAN Z , et al. A novel long-time coherent integration method for moving target detection[J]. Journal of Beijing Institute of Technology, 2021, 30 (4): 340- 351.
30	薛东方, 朱晓秀, 胡文华, 等. 基于加权l₁范数优化的双基地ISAR稀疏成像算法[J]. 系统工程与电子技术, 2021, 43 (4): 944- 953.
	XUE D F , ZHU X X , HU W H , et al. Bi-ISAR imaging based on weighted l₁ norm optimization algorithm[J]. Systems Engineering and Electronics, 2021, 43 (4): 944- 953.
31	艾小锋. 双/多基地雷达目标探测与识别[M]. 北京: 电子工业出版社, 2020: 28- 30.
	AI X F . Bi/multi-static radar target detection and identification[M]. Beijing: Publishing House of Electronics Industry, 2020: 28- 30.
32	OZDEMIR C . Inverse synthetic aperture radar imaging with MATLAB_Ⓡ algorithms: with advanced SAR/ISAR imaging concepts, algorithms, and MATLAB_Ⓡ codes[M]. 2nd ed. Hoboken: Wiley, 2012: 448- 452.

场景参数	取值
金属球直径D/m	0.1
收发雷达起始间距L/m	1.3
发射雷达与目标起始间距R_t/m	2.6
接收雷达与目标起始间距R_r/m	2.2
初始双基地角β_init/(°)	30
合成孔径长度L_a/m	0.192
最终双基地角β_final/(°)	26

雷达参数	接收雷达	发射雷达
起始频率f_ini/GHz	77	77
调频率S/(MHz/μs)	19.553	19.553
带宽B/MHz	2 002.23	-
采样点数	1 024	-
采样率f_s/MHz	10	-
滤波器截止频率f_cut/MHz	35	-

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