导航卫星星地双基SAR时频同步误差估计方法

doi:10.19665/j.issn1001-2400.2023.02.005

Abstract

Abstract:

In order to verify the mechanism of GEO SAR imaging with a long synthetic aperture time,the equivalence verification is executed by satellite-to-ground bistatic configuration,which is composed of the Beidou 3 IGSO navigation satellite and the ground-stationary receiver.According to the signal characteristics of navigation satellites and the time-frequency synchronization problem of the satellite-to-ground bistatic SAR,based on the echo data a time-frequency synchronization error estimation method of satellite-ground bistatic SAR echo data is proposed to estimate the delay error of navigation satellite ranging code and correct the error.First,the one-dimensional direct wave signal and the reflected wave signal are divided into two dimensions according to the pulse repetition frequency of the navigation satellite,which preserves the integrity of the whole collected signal.The correct peak position sequence under non-ideal sampling environment is obtained by the matching filter on the range of the direct wave signal,and then the peak position sequence is used to complete the time synchronization error compensation of the direct wave signal and the reflected wave signal,and so with the correction of the local ranging code,which solves the problem of the mismatch between the envelope distribution of the distance pulse pressure signal after time synchronization and the theorectical model in the satellite-ground bistatic SAR imaging of the Beidou-3 IGSO navigation satellite.Second,the corrected local ranging code is used to obtain the direct wave peak phase vector by matching filtering the direct wave signal.Finally,the peak phase vector is used to perform frequency error compensation,followed by the bistatic SAR imaging processing of the reflected wave signal.The processing results of the measured data verify the effectiveness of the proposed method.

Key words: GEO SAR, Beidou 3 Navigation Satellite, bistatic SAR, ranging code, time-frequency synchronization

CLC Number:

TN957

TI Jingjing, SUO Zhiyong, WANG Tingting, ZHAO Bingji, ZHANG Leru. Time-frequency synchronization error estimation method for the satellite-to-ground bistatic SAR for a navigation satellite[J].Journal of Xidian University, 2023, 50(2): 42-53.

Figures/Tables 9

References 25

[1]	MELZI M, HU C, DONG X C, et al. Velocity Estimation of Multiple Moving Targets in Single-Channel Geosynchronous SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2020, 58(8):5861-5879. doi: 10.1109/TGRS.2020.2971853
[2]	HU C, CHEN Z Y, DONG X C, et al. Multistatic Geosynchronous SAR Resolution Analysis and Grating Lobe Suppression Based on Array Spatial Ambiguity Function[J]. IEEE Transactions on Geoscience and Remote Sensing, 2020, 58(9):6020-6038. doi: 10.1109/TGRS.36
[3]	ZHOU B, QI X, ZHANG H. An Accurate GEO SAR Range Model for Ultralong Integration Time Based on Mth-Order Taylor Expansion[J]. Remote Sensing, 2021, 13(2):255. doi: 10.3390/rs13020255
[4]	ZHANG Y, XIONG W, DONG X, HU C. A Novel Azimuth Spectrum Reconstruction and Imaging Method for Moving Targets in Geosynchronous SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2020, 58(8):5976-5991. doi: 10.1109/TGRS.36
[5]	AZCUETA M, TEBALDINI S. Potential for Absolute Ionosphere and Clock Correction in Noncooperative Bistatic SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2020, 58(1):363-377. doi: 10.1109/TGRS.36
[6]	SUN ZC, AN H Y, WU J J, YANG J Y. A Novel Unambiguous Imaging Method for Geosynchronous Spaceborne-Airborne Bistatic SAR[C]//Proceedings of the IEEE International Geoscience and Remote Sensing Symposium. Piscataway:IEEE, 2021:2975-2978.
[7]	杨军, 周芳. 分布式小卫星MIMO-SAR超高分辨成像方法[J]. 西安电子科技大学学报, 2021, 48(2):99-108.
	YANG Jun, ZHOU Fang. Distributed Small Satellite MIMO-SAR Ultra-High Resolution Imaging Method[J]. Journal of Xidian University, 2021, 48(2):99-108.
[8]	LI Y, LI W C, LI Z Y, et al. Frequency Reference Error Analysis for Bistatic SAR[C]//Proceedings of the IEEE International Geoscience and Remote Sensing Symposium. Piscataway:IEEE, 2019:3527-3530.
[9]	吴刚, 刘银年. 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 Gang, LIU Yinnian. Research on Pseudolite Clock Synchronization Method[J]. Optical Fiber and Cable and Its Application Technology, 2007(2):25-28.
[10]	SU C C. Reinterpretation of the Michelson-Morley Experiment Based on the GPS Sagnac Correction[J]. Europhysics Letters Edp Sciences, 2001, 56(2):170-174.
[11]	王晓晗, 杨旭海. 卫星双向法时间频率传递中Sagnac效应的计算分析[J]. 仪器仪表学报, 2006 (S1):628-630.
	WANG Xiaohan, YANG Xuhai. Computational Analysis of Sagnac Effect in Two-Way Satellite Time and Frequence Transfer[J]. Journal of Instrument and Instrumentation, 2006 (S1):628-630.
[12]	王淑芳, 王礼亮. 卫星导航定位系统时间同步技术[J]. 全球定位系统, 2005, 30(2):10-14.
	WANG Shufang, WANG Liliang. Time Synchronization Technology of Satellite Navigation and Positioning System[J]. Global Positioning System, 2005, 30(2):10-14.
[13]	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]//Proceedings of the IEEE Radar Conference. Piscataway:IEEE, 2019:1-3.
[14]	JIN GD, LIU K Y, LIU D C, et al. An Advanced Phase Synchronization Scheme for LT-1[J]. IEEE Transactions on Geoscience and Remote Sensing, 2019, 58(3):1735-1746. doi: 10.1109/TGRS.36
[15]	LIANGD, LIU K Y, YUE H X, et al. An Advanced Non-Interrupted Synchronization Scheme for Bistatic Synthetic Aperture Radar[C]//Proceedings of the IEEE International Geoscience and Remote Sensing Symposium. Piscataway:IEEE, 2019:1116-1119.
[16]	LIANG D, LIU K Y, ZHANG H, et al. A High-Accuracy Synchronization Phase-Compensation Method Based on Kalman Filter for Bistatic Synthetic Aperture Radar[C]//Proceedings of the IEEE Geoscience and Remote Sensing Letters. Piscataway:IEEE, 2019:1722-1726.
[17]	ESPETER T, WALTERSCHEID I, KLARE J, et al. Synchronization Techniques for the Bistatic Spaceborne/Airborne SAR Experiment with TerraSAR-X and PAMIR[C]//Proceedings of the IEEE International Geoscience & Remote Sensing Symposium. Piscataway:IEEE, 2007:2160-2163.
[18]	ZHANG H, DENG Y, ROBERT W, et al. Spaceborne/Stationary Bistatic SAR Imaging with TerraSAR-X as an Illuminator in Staring-Spotlight Mode[J]. IEEE Transactions on Geoscience and Remote Sensing, 2016, 54(9):5203-5216. doi: 10.1109/TGRS.2016.2558294
[19]	BEHNER F, REUTER S, NIES H, et al. Synchronization andProcessing in the HITCHHIKER Bistatic SAR Experiment[J]. IEEE Journal of Selected Topics in Applied Earth Observations & Remote Sensing, 2016, 9(3):1028-1035.
[20]	ANGHEL A, CACOVEANU R, MOLDOVAN A S, et al. Simplified Bistatic SAR Imaging with a Fixed Receiverand TerraSAR-X as Transmitter of Opportunity-First Results[C]// Proceedings of the IEEE International Geoscience and Remote Sensing Symposium.Piscataway: 2016:2094-2097.
[21]	谢辉, 谢军伟, 冯广飞. 双/多基地雷达时间同步的一种新方法[J]. 现代防御技术, 2012, 40(6):135-139.
	XIE Hui, XIE Junwei, FENG Guangfei. A New Method for Time Synchronization of Bistatic/Multistatic Radar[J]. Modern Defense Technology, 2012, 40(6):135-139.
[22]	张天. 基于导航卫星的双基地差分干涉SAR形变反演技术研究[D]. 北京: 北京理工大学, 2017.
	ZHANG Tian. Research on Deformation Inversion Technology of Bistatic Differential Interferometry SAR Based on Navigation Satellite[D]. Beijing: Beijing Institute of Technology, 2017.
[23]	田卫明, 曾涛, 胡程. 基于导航信号的BiSAR成像技术[J]. 雷达学报, 2013, 2(1):39-45.
	TAI Weiming, ZENG Tao, HU Cheng. BiSAR Imaging Technology Based on Navigation Signals[J]. Journal of Radar,IEEE. 2013, 2(1):39-45.
[24]	北斗网. 关于发布《北斗卫星导航系统空间信号接口控制文件——公开服务信号B3I(1.0)版》公告[EB/OL].[2018-02-09]. http://www.beidou.gov.cn/yw/xwzx/201802/t20180209_14125.html.
[25]	ZHANG Q L, CHANG W G, ZENG Z F, et al. AnIntegrative Synchronization and Imaging Algorithm for GNSS-based BSAR[J]. Sciece China Information Sciences, 2015, 58(6):1-15.

指标	理论值	实测值	展宽/%
方位向分辨率/m	4.193 2	4.228 2	0.83
地距向分辨率/m	21.210 7	21.404 2	0.91

Time-frequency synchronization error estimation method for the satellite-to-ground bistatic SAR for a navigation satellite

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 25

Related Articles 7

Metrics

Comments

Recommended 10

[1]	XIAO Shanghui,CHEN Yanming,WANG Ziyu,GUO Wenbo,SHAO Shihai. Impact of cooperative jamming time-frequency synchronization errors on secure communication performance [J]. Journal of Xidian University, 2022, 49(3): 1-9.
[2]	LIU Wenkang;SUN Guangcai;CHEN Jianlai;XING Mengdao. Design method for bandwidth and synthetic aperture time in GEOSAR [J]. Journal of Xidian University, 2017, 44(5): 58-63.
[3]	CHEN Jianlai;ZHANG Rui;SUN Guangcai;JING Guobin;XING Mengdao. Azimuth variation correction method for geosynchronous synthetic aperture radar [J]. Journal of Xidian University, 2016, 43(5): 18-23+62.
[4]	XUE Rui;WEI Qiang;XU Xichao. Performance research on ranging codes based on the chaotic sequence [J]. J4, 2015, 42(3): 103-108.
[5]	LIU Xin;ZHANG Linrang;LIU Nan. Ambiguity function of the ground-satellite bistatic SAR system [J]. J4, 2013, 40(4): 65-71.
[6]	LIU Yuchun;WANG Jun;LI Hongwei. New method of deriving the spectrum for general bistatic SAR processing [J]. J4, 2012, 39(3): 72-79.
[7]	LIANG Yi;WANG Hongxian;XING Mengdao;BAO Zheng. Modified RMA for the tandem bistatic FMCW SAR with frequency non-linearity correction [J]. J4, 2011, 38(1): 71-79+84.