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2022 3rd China International SAR Symposium (CISS)最新文献

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Self-excitation debugging of the Ka-band multichannel T/R module ka波段多通道收发模块的自激调试
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971370
Qi Qiao, Cichen Duan, Yabin Li, Zhongyu Hu, Hang Lan
{"title":"Self-excitation debugging of the Ka-band multichannel T/R module","authors":"Qi Qiao, Cichen Duan, Yabin Li, Zhongyu Hu, Hang Lan","doi":"10.1109/CISS57580.2022.9971370","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971370","url":null,"abstract":"Modern active phased array radars (APAR) develop in the direction of high working frequencies and multi-channels with a narrow structural width and short length. The inter-stage coupling of the channels becomes uncontrollable and it is much easier to self-excite for transmitting signals. We have investigated the methods in dealing with the self-excitation phenomenon and spurious signals in the electrical measurement for T/R modules with high working frequencies and compact channel structure, and given specific suggestions from the perspective of amplifier bandwidth, gain of the signal path and precautions for SMT to solve such problems.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114381624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MTRC Compensation and Sparse Aperture ISAR Imaging Based on Sparse Bayesian Learning 基于稀疏贝叶斯学习的MTRC补偿和稀疏孔径ISAR成像
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971380
Bangjie Zhang, Yanyang Liu, Gang Xu
{"title":"MTRC Compensation and Sparse Aperture ISAR Imaging Based on Sparse Bayesian Learning","authors":"Bangjie Zhang, Yanyang Liu, Gang Xu","doi":"10.1109/CISS57580.2022.9971380","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971380","url":null,"abstract":"In inverse synthetic aperture radar (ISAR) imaging, large variation angle contributes to high azimuthal resolution, provided that migration through resolution cell (MTRC) is compensated during the coherent processing interval (CPI). Usually, it is challenging to realize accurate MTRC compensation in the sparse aperture (SA) case, which tends to impede coherent accumulation and degrade the imaging performance. In this paper, a novel high-resolution SA ISAR imaging algorithm based on sparse Bayesian learning (SBL) is proposed, which can effectively incorporate the MTRC compensation and SA imaging simultaneously. In the scheme, the SA imaging is modeled as an inversion process of a linear problem with sparse prior, where chirp-Fourier dictionary is constructed to describe the MTRC during rotational motion. Then, the sparse signal recovery problem is solved using variational Bayesian inference (VBI) algorithm. Experiments on simulated and measured data confirm the effectiveness of the proposal.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114399740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrated System of Side-looking InSAR Altimeter and Nadir-looking Altimeter Based on Signal Coding 基于信号编码的InSAR侧视高度计与下视高度计集成系统
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971255
Hui Yu, Lei Cui, Yanyang Liu, Ruifeng Lu, Haitao Wang, Xiangdong Li
{"title":"Integrated System of Side-looking InSAR Altimeter and Nadir-looking Altimeter Based on Signal Coding","authors":"Hui Yu, Lei Cui, Yanyang Liu, Ruifeng Lu, Haitao Wang, Xiangdong Li","doi":"10.1109/CISS57580.2022.9971255","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971255","url":null,"abstract":"Satellite radar altimeter is an important means to obtain global marine dynamic environmental factors such as sea surface height, significant wave height and sea surface wind speed. Based on the sparse characteristics of the nadir echo, this paper proposes the integrated system design of the nadir-looking altimeter and the side-looking interferometric synthetic aperture radar (InSAR) altimeter by signal coding for the first time. The system transmits the coded signal pulse sequence periodically and selects the appropriate pulse repetition frequency (PRF), so that the echo from nadir and side area are received at the same time, but their corresponding radar transmission signal waveforms are different; The transmitted signal corresponding to the nadir echo signal is used as the matched filter function to compress the received echo signal, and the bottom elevation is inversed by tracking and extracting the nadir echo signal, so as to realize the function of nadir-looking altimeter; Then, the transmitted signal corresponding to the nadir echo signal is used as the anti-matching filter function to carry out the anti-matching filter processing on the signal that removes the nadir echo signal, and then the transmitted signal corresponding to the side echo signal is used as the matching filter function to carry out range compression, and the subsequent azimuth compression and subsequent interferometric processing are carried out to realize the function of interferometric synthetic aperture radar side-looking altimeter. The system design method can provide important support for the development of Spaceborne Radar Altimeter System in China in the future.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"63 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116820998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Thinned Arrays Based on Genetic Algorithm 基于遗传算法的稀疏阵列设计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971240
Yuhuan Zhang, Xinzhong Zhu, Yuchen Zhang, Xiaochun Xiang, Tianle Zhang
{"title":"Design of Thinned Arrays Based on Genetic Algorithm","authors":"Yuhuan Zhang, Xinzhong Zhu, Yuchen Zhang, Xiaochun Xiang, Tianle Zhang","doi":"10.1109/CISS57580.2022.9971240","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971240","url":null,"abstract":"Genetic algorithm (GA) is employed for thinned array synthesis in this paper, and the side lobe level is used as the optimization target to optimize the position of the array elements. The simulation results show that the −17dB side lobe level is achieved under the condition of 50% sparse rate, which verifies the effectiveness of the algorithm. By adopting thinned array, the channel number of phased arrays is reduced, thus reducing the antenna cost.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114459527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Research on the Evaluation Mechanism of Spaceborne SAR system to Ground-Based Radar Co-Frequency Interference 星载SAR系统对地基雷达共频干扰的评估机制研究
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971188
Qian Sun, Fei Peng, Hui Liu, Lei Xing, Rui Pan, Fan Jiang
{"title":"Research on the Evaluation Mechanism of Spaceborne SAR system to Ground-Based Radar Co-Frequency Interference","authors":"Qian Sun, Fei Peng, Hui Liu, Lei Xing, Rui Pan, Fan Jiang","doi":"10.1109/CISS57580.2022.9971188","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971188","url":null,"abstract":"Synthetic Aperture Radar (SAR) is an active sensor that can be installed on satellites and other flight platforms to observe the earth with high resolution, which is widely used in environmental monitoring, resource surveying, and military applications and so on. It has become a hot issue to evaluate the time-varying interference of spaceborne SAR system for protecting the ground-based radars from harmful interference. This study proposes a co-frequency interference evaluation mechanism of spaceborne SAR systems to ground-based radars. First, the time-probability based interference evaluation threshold is discussed. Second, the algorithms to calculate the power level of the interfering pulsed signal are introduced and the impacts of the key parameters are analyzed. Finally, simulation results of the interference caused by typical domestic and foreign spaceborne SAR systems to China’s ground-based meteorological radars are provided, and the validity of the proposed mechanism is verified.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128688745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Overview of dual bus solar array design for SAR satellite SAR卫星双母线太阳能电池阵设计综述
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971190
Qiu Hengkang, Han Jifeng, Wu Xianhua, You Qianlin, Chu Hong, Su Baofa, Zhang Lisheng, Chen Kaijian
{"title":"Overview of dual bus solar array design for SAR satellite","authors":"Qiu Hengkang, Han Jifeng, Wu Xianhua, You Qianlin, Chu Hong, Su Baofa, Zhang Lisheng, Chen Kaijian","doi":"10.1109/CISS57580.2022.9971190","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971190","url":null,"abstract":"Space solar array is the main energy source of spacecraft in orbit. Synthetic aperture radar (SAR) satellites consume a large amount of power. Generally, the power demand of the whole satellite is in the 10000 watt level. Its solar array usually adopts a dual bus design. The high-voltage (68V) is the SAR load bus and the low-voltage (30V) is the satellite platform bus. The solar cell usually adopts Triple-junction GaAs solar cell with an photoelectric conversion efficiency better than 30%. Based on the energy demand characteristics of SAR satellite, according to the relevant criteria of satellite power design, and combined with the design example of SAR satellite solar array, this paper gives the basic ideas and methods of SAR satellite solar array design.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132734851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of spaceborne Ku-band four-channel delay module 星载ku波段四通道延迟模块设计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971233
Hongying Zhang, Xiaojing Fan, Hanbing Luo, Yuan Chen, Long Huang
{"title":"Design of spaceborne Ku-band four-channel delay module","authors":"Hongying Zhang, Xiaojing Fan, Hanbing Luo, Yuan Chen, Long Huang","doi":"10.1109/CISS57580.2022.9971233","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971233","url":null,"abstract":"Ku band four-channel delay module is mainly used for dual polarization SAR. The main first function of delay module is to receive the feed RF pulse signal, then delay and power amplification, output to the T/R module. The second function is to receive the echo signal input of the T/R component, after amplification and delay output. The delay module is a four-channel module, the large bit delay is distributed in the main chain, which is used for rough tuning, and the small bit delay is distributed in four branches, which is used for fine tuning. In the delay module, the LTCC microwave multilayer is used in the substrate, the delay is realized by GaAs MMIC delay chip, and the assembly is realized by micro-assembly process. The power / control interface of the module adopts J30JM low frequency connector, which is flexible to plug and pull, and the high frequency interface is in the form of SSMA interface. Finally, the 0-30 wavelength delay is realized in the frequency band 15.8-17GHz range.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121978962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wide-Beam Unmanned Vehicle SAR Imaging Without Inertial Navigation System 无惯性导航的宽波束无人驾驶车辆SAR成像
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971378
Xinshuai Sun, Linghao Li, Yan Wang, Han Li, Zegang Ding, Junjie Yan
{"title":"Wide-Beam Unmanned Vehicle SAR Imaging Without Inertial Navigation System","authors":"Xinshuai Sun, Linghao Li, Yan Wang, Han Li, Zegang Ding, Junjie Yan","doi":"10.1109/CISS57580.2022.9971378","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971378","url":null,"abstract":"Unmanned vehicles (UV) synthetic aperture radar (SAR) imaging has the characteristics of all-weather, all-time and flexibility, so it can be used as a complementary means of optical imaging in autonomous driving, which has developed rapidly and become a hot topic in recent years. However, the accuracy of inertial navigation system (INS) carried by UV is low or no INS is mounted, which makes the image to be severely defocused. In this paper, an imaging algorithm independent of inertial navigation data is proposed. The precise trajectory of the UV radar is estimated based on the echo data, and well-focused UV SAR images can be obtained by this method. The proposed algorithm has been verified by the crawler-type UV SAR experiment and well-focused two-dimensional and three-dimensional radar images are obtained.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125190379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Path Planning for Satellite Formation Configuration Changes 卫星编队构型变化时的路径规划研究
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971313
Han Wu, Fei Han
{"title":"Research on Path Planning for Satellite Formation Configuration Changes","authors":"Han Wu, Fei Han","doi":"10.1109/CISS57580.2022.9971313","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971313","url":null,"abstract":"For different observation tasks, synthetic aperture radar(SAR) satellite formation needs to adopt different configurations. In this case, how to realize the path planning is an important research problem for configuration transition. In this paper, a sequential convex programming(SCP) is proposed for the swarm reconfiguration that involve avoiding collisions and minimizing fuel. The quadratic performance index of the control variable represents the optimization index of path planning to ensure the optimal fuel consumption. Then, a linear discrete relative orbital dynamic model under the J2 perturbation is constructed. Regarding the dynamic constraints and the prevention of inter-satellite collisions as basic constraints, the path planning problem of configuration transformation is solved as a discretized convex programming problem. The SCP is introduced to realize iterated optimal planning. This algorithm reduces the computational complexity while developing the high control precision. Through experimental analysis, this method can ensure that there is no collision risk between satellites, and the planning converges to complete configuration reconstruction.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127959771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Orientation Estimation for Airplane Targets in SAR Images Based on Keypoint Detection 基于关键点检测的SAR图像中飞机目标方位估计
2022 3rd China International SAR Symposium (CISS) Pub Date : 2022-11-02 DOI: 10.1109/CISS57580.2022.9971383
Xinyang Pu, He Jia, Yutong Qian, F. Xu
{"title":"Orientation Estimation for Airplane Targets in SAR Images Based on Keypoint Detection","authors":"Xinyang Pu, He Jia, Yutong Qian, F. Xu","doi":"10.1109/CISS57580.2022.9971383","DOIUrl":"https://doi.org/10.1109/CISS57580.2022.9971383","url":null,"abstract":"Object detection in aerial images is a challenging task since objects distribute in arbitrary orientations under the top view of remote sensing images (RSIs). Recent methods exploit oriented bounding boxes (OBB) to represent oriented objects accurately. However, airplane targets in different orientations appear very differently in Synthetic Aperture Radar (SAR) images due to the complicated imaging mechanism and various scattering conditions. Most SAR image datasets for airplanes are annotated with horizontal bounding boxes (HBB) and related research focuses on HBB without orientation information. This paper proposes a method for predicting the orientation of airplane targets in SAR images based on keypoints detection. Specifically, the object detection module is adopted to generate proposal regions of airplane targets in the first stage. Then, the proposal regions are utilized in the orientation prediction module to detect the head and tail of an airplane. The proposed method provides semantic orientation information for airplane targets in SAR images labeled by HBB. The experiments are conducted on Gaofen-3 (GF-3) dataset with labels of aircraft keypoints, and the accuracy of orientation estimation is achieved 85.8%. The Mean Average orientation Error is 18.24°. Furthermore, the orientation estimation model is applied on SAR Aircraft Detection Dataset (SADD) to supplement orientation information for airplane targets.","PeriodicalId":331510,"journal":{"name":"2022 3rd China International SAR Symposium (CISS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127978114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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